chore(release): 2.10.0

test(core): migrate a database 2.8.2 wrote, with ops in every state
A dump of a database the 2.8.2 build wrote, with queued ops due, parked, failing, deferred for access and claimed, and creates queued below a folder made offline. Its migration checks every column of the queue and the sealed revisions, as the real-database test now does too.
2026-11-05 17:02:11 +01:00 · 2026-10-03 21:57:23 +02:00 · 2026-10-03 21:55:15 +02:00 · 2026-10-03 16:53:31 +02:00 · 2026-10-03 16:53:31 +02:00 · 2026-10-03 16:41:26 +02:00
213 changed files with 137982 additions and 8901 deletions
@@ -0,0 +1,101 @@
+name: AUR
+
+on:
+  # The -git package computes its pkgver from git at build time, so a new commit
+  # upstream needs no AUR push. Only a changed -git recipe is published.
+  push:
+    branches: [main]
+    paths:
+      - 'packaging/aur/proton-drive-for-linux-git/**'
+  # Called by release.yml once the GitHub release and its assets exist.
+  workflow_call:
+    inputs:
+      version:
+        required: true
+        type: string
+    secrets:
+      AUR_SSH_PRIVATE_KEY:
+        required: true
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Release to publish, such as 2.1.0. Leave empty to publish only the -git package.'
+        required: false
+        type: string
+
+permissions:
+  contents: write
+
+concurrency:
+  group: aur
+  cancel-in-progress: false
+
+jobs:
+  publish:
+    name: Publish AUR packages
+    runs-on: ubuntu-24.04
+    container: archlinux:base-devel
+    env:
+      # makepkg refuses to run as root, so the packaging steps run as `builder`.
+      HOME: /home/builder
+      VERSION: ${{ inputs.version }}
+
+    steps:
+      - name: Install packaging tools
+        run: pacman -Syu --noconfirm --needed git openssh pacman-contrib
+
+      - name: Checkout repository
+        uses: actions/checkout@v7
+        with:
+          # The updated recipes are committed back to main, not to the tag.
+          ref: main
+
+      - name: Create build user
+        run: |
+          useradd --create-home builder
+          chown -R builder: "$GITHUB_WORKSPACE"
+
+      - name: Configure AUR access
+        env:
+          AUR_SSH_PRIVATE_KEY: ${{ secrets.AUR_SSH_PRIVATE_KEY }}
+        run: |
+          install -d -m700 -o builder -g builder "$HOME/.ssh"
+          printf '%s\n' "$AUR_SSH_PRIVATE_KEY" > "$HOME/.ssh/aur"
+          cat > "$HOME/.ssh/config" <<'EOF'
+          Host aur.archlinux.org
+            IdentityFile ~/.ssh/aur
+            User aur
+          EOF
+          # Pin the host key to the fingerprint published on aur.archlinux.org.
+          ssh-keyscan -t ed25519 aur.archlinux.org > "$HOME/.ssh/known_hosts"
+          ssh-keygen -lf "$HOME/.ssh/known_hosts" | grep -q 'SHA256:RFzBCUItH9LZS0cKB5UE6ceAYhBD5C8GeOBip8Z11+4'
+          chown -R builder: "$HOME/.ssh"
+          chmod 600 "$HOME/.ssh/aur"
+          runuser -u builder -- git config --global user.name 'Nils Pukropp'
+          runuser -u builder -- git config --global user.email 'contact@narl.io'
+
+      - name: Update release packages
+        if: env.VERSION != ''
+        run: runuser -u builder -- packaging/aur/update.sh "${VERSION#v}"
+
+      - name: Refresh the -git metadata
+        if: env.VERSION == ''
+        working-directory: packaging/aur/proton-drive-for-linux-git
+        run: runuser -u builder -- sh -c 'makepkg --printsrcinfo > .SRCINFO'
+
+      - name: Publish to the AUR
+        run: |
+          if [ -n "$VERSION" ]; then
+            runuser -u builder -- packaging/aur/push.sh
+          else
+            runuser -u builder -- packaging/aur/push.sh proton-drive-for-linux-git
+          fi
+
+      - name: Commit the updated recipes to main
+        if: env.VERSION != ''
+        run: |
+          runuser -u builder -- git add packaging/aur
+          if ! runuser -u builder -- git diff --cached --quiet; then
+            runuser -u builder -- git commit -m "chore(aur): update packages to ${VERSION#v}"
+            runuser -u builder -- git push origin HEAD:main
+          fi
@@ -13,7 +13,7 @@ jobs:
  rust:
    runs-on: ubuntu-24.04
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7

      - name: Install native dependencies
        run: |
@@ -32,8 +32,14 @@ jobs:
        with:
          toolchain: '1.96'
          components: rustfmt, clippy
+          cache: false

+      # Tags can only restore caches saved on main, so only main saves one. The
+      # release workflow restores this key for its quality gates.
      - uses: swatinem/rust-cache@v2
+        with:
+          shared-key: debug
+          save-if: ${{ github.ref == 'refs/heads/main' }}

      - name: Formatting
        run: cargo fmt --all -- --check
@@ -57,3 +63,74 @@ jobs:

  # Real Proton credentials and /dev/fuse deliberately do not run on pull
  # requests. Follow docs/TESTING.md on a dedicated test-account runner.
+
+  # The seeded simulation runs (docs/MILESTONE-3.0.0.md §8.2): real FUSE
+  # daemons against an in-memory Drive, so they need /dev/fuse but no account.
+  simulation:
+    if: github.event_name != 'pull_request'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 30
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - name: Install native dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            pkg-config \
+            fuse3 \
+            libfuse3-dev \
+            libgtk-4-dev \
+            libadwaita-1-dev \
+            libwebkitgtk-6.0-dev \
+            libsecret-1-dev \
+            libdbus-1-dev
+
+      - name: Install minimum supported Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          toolchain: '1.96'
+          cache: false
+
+      - uses: swatinem/rust-cache@v2
+        with:
+          shared-key: debug
+          save-if: false
+
+      - name: Simulation runs
+        run: 'cargo test -p pdfs-fuse --lib --locked sim:: -- --ignored --test-threads=1'
+
+  # Keeps the release-profile dependencies cached on main, where the release
+  # workflow can restore them; a tag cannot reuse the caches of earlier tags.
+  release-cache:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-24.04
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - name: Install native dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            pkg-config \
+            libfuse3-dev \
+            libgtk-4-dev \
+            libadwaita-1-dev \
+            libwebkitgtk-6.0-dev \
+            libsecret-1-dev \
+            libdbus-1-dev
+
+      - name: Install minimum supported Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          toolchain: '1.96'
+          cache: false
+
+      - uses: swatinem/rust-cache@v2
+        with:
+          shared-key: release
+
+      - name: Release build
+        run: cargo build --release --locked
@@ -10,14 +10,13 @@ permissions:
  contents: write

 jobs:
-  build-release:
-    name: Build and Release
+  checks:
+    name: Release quality gates
    runs-on: ubuntu-24.04
-    environment: 'rpm signing'

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7

      - name: Install system dependencies
        run: |
@@ -29,18 +28,22 @@ jobs:
            libadwaita-1-dev \
            libwebkitgtk-6.0-dev \
            libsecret-1-dev \
-            libdbus-1-dev \
-            desktop-file-utils \
-            rpm
+            libdbus-1-dev

      - name: Set up Rust
        uses: actions-rust-lang/setup-rust-toolchain@v1
        with:
          toolchain: '1.96'
          components: rustfmt, clippy
+          cache: false

+      # A tag can read the caches of main but its own caches are useless to the next
+      # tag, so this only restores what CI saved on main.
      - name: Cache Cargo target
        uses: swatinem/rust-cache@v2
+        with:
+          shared-key: debug
+          save-if: false

      - name: Verify tag and manifest versions
        if: startsWith(github.ref, 'refs/tags/')
@@ -59,6 +62,43 @@ jobs:
          cargo test --workspace --locked
          scripts/fuse-acceptance.sh --offline-only

+  build-release:
+    name: Build packages
+    runs-on: ubuntu-24.04
+    environment: 'rpm signing'
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v7
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            pkg-config \
+            libfuse3-dev \
+            libgtk-4-dev \
+            libadwaita-1-dev \
+            libwebkitgtk-6.0-dev \
+            libsecret-1-dev \
+            libdbus-1-dev \
+            desktop-file-utils \
+            gettext \
+            rpm
+
+      - name: Set up Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          toolchain: '1.96'
+          cache: false
+
+      # Restores the release-profile dependencies that CI builds on main.
+      - name: Cache Cargo target
+        uses: swatinem/rust-cache@v2
+        with:
+          shared-key: release
+          save-if: false
+
      - name: Build release binaries
        run: |
          cargo build --release --locked
@@ -84,6 +124,7 @@ jobs:
          cp target/release/pdfs-tray dist/binaries/
          cp target/release/pdfs-app dist/binaries/
          cp target/release/pdfs-prompt dist/binaries/
+          po/build.sh dist/binaries/locale
          
          # Create tarball
          tar -czf proton-drive-linux-${{ env.VERSION }}-x86_64.tar.gz -C dist/binaries .
@@ -110,6 +151,7 @@ jobs:
          cp packaging/io.narl.proton-drive-linux.svg deb/usr/share/icons/hicolor/scalable/apps/
          cp packaging/proton-drive.service deb/usr/lib/systemd/user/
          cp LICENSE deb/usr/share/licenses/proton-drive-linux/
+          po/build.sh deb/usr/share/locale

          # Calculate Installed-Size in KB for the control file
          INSTALLED_SIZE=$(du -sk deb | cut -f1)
@@ -124,7 +166,7 @@ jobs:
          Maintainer: Nils Pukropp <contact@narl.io>
          Depends: fuse3, libgtk-4-1 (>= 4.12.0), libadwaita-1-0 (>= 1.5.0), libsecret-1-0, libwebkitgtk-6.0-4, libimage-exiftool-perl
          Installed-Size: ${INSTALLED_SIZE}
-          Homepage: https://github.com/narrrl/proton-drive-linux
+          Homepage: https://proton-drive.narl.io
          Description: Unofficial Proton Drive client for Linux
           Files-on-demand Proton Drive for the Linux desktop, unaffiliated with Proton AG:
           - FUSE virtual mount with block-level caching
@@ -149,6 +191,7 @@ jobs:
            --define "_topdir $PWD/rpmbuild" \
            --define "_sourcedir $PWD" \
            --define "git_dir $PWD" \
+            --define "prebuilt 1" \
            --define "version ${RPM_VERSION}" \
            --define "_dbpath $PWD/rpmbuild/db" \
            packaging/proton-drive-linux.spec
@@ -178,7 +221,7 @@ jobs:


      - name: Upload Workflow Artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
        with:
          name: proton-drive-linux-builds
          path: |
@@ -187,9 +230,20 @@ jobs:
            *.rpm
          if-no-files-found: error

+  publish:
+    name: Create GitHub Release
+    needs: [checks, build-release]
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Download packages
+        uses: actions/download-artifact@v8
+        with:
+          name: proton-drive-linux-builds
+
      - name: Create GitHub Release
-        if: startsWith(github.ref, 'refs/tags/')
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v3
        with:
          files: |
            *.deb
@@ -199,3 +253,13 @@ jobs:
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  aur:
+    name: Publish AUR packages
+    needs: publish
+    if: startsWith(github.ref, 'refs/tags/')
+    uses: ./.github/workflows/aur.yml
+    with:
+      version: ${{ github.ref_name }}
+    secrets:
+      AUR_SSH_PRIVATE_KEY: ${{ secrets.AUR_SSH_PRIVATE_KEY }}
@@ -6,9 +6,10 @@ deliberately high — everything else is ordinary Rust review.

 ## Before you start

- Read [`AGENTS.md`](AGENTS.md) for repository conventions and
-  [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md) for how the daemon, front ends, and SDK fit
-  together.
+- Read [`AGENTS.md`](AGENTS.md) for repository conventions,
+  [`docs/DEVELOPMENT.md`](docs/DEVELOPMENT.md) for building, running and debugging from source,
+  and [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md) for how the daemon, front ends, and SDK fit
+  together. [`docs/README.md`](docs/README.md) indexes the rest.
 - Check [`docs/BUGS.md`](docs/BUGS.md) — it is the authoritative issue ledger, and your problem may
  already be tracked there with context.
 - For anything larger than a fix, open an issue first so the design can be discussed before you
@@ -23,8 +24,9 @@ cargo build --workspace
 ```

 GUI and FUSE targets need the GTK4, libadwaita, WebKitGTK 6, libsecret, D-Bus, and FUSE3
-development packages listed in the [README](README.md#prerequisites). Minimum supported Rust
-version is 1.96.
+development packages listed in [`docs/INSTALL.md`](docs/INSTALL.md#build-dependencies). Minimum
+supported Rust version is 1.96. [`docs/DEVELOPMENT.md`](docs/DEVELOPMENT.md#running-from-source)
+explains how to run your build next to, or instead of, the installed service.

 ## Quality gates

@@ -51,6 +53,13 @@ use a dedicated test account, never one holding data you cannot lose.
  control-socket work stays off GTK's main thread.
 - **`staging/` and `recovery/` may hold the only copy of user data.** Nothing may clear or purge
  them opportunistically.
+- **The GUI is fully translated.** Wrap every user-visible string in the helpers from
+  `crates/pdfs-gui/src/i18n.rs`, run `po/update.sh`, and translate the new entries in every
+  catalog in `po/LINGUAS` in the same change. See [`docs/TRANSLATING.md`](docs/TRANSLATING.md).
+  The CLI and daemon messages stay in English.
+- **Document what users see.** A new command, setting or behaviour belongs in the matching page
+  under `docs/` (user guide, CLI reference or configuration) and in the `[Unreleased]` section of
+  [`docs/CHANGELOG.md`](docs/CHANGELOG.md).

 ## Commits and pull requests

@@ -467,6 +467,12 @@ dependencies = [
 "digest 0.10.7",
 ]

+[[package]]
+name = "block"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
+
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -1814,6 +1820,26 @@ dependencies = [
 "wasm-bindgen",
 ]

+[[package]]
+name = "gettext-rs"
+version = "0.7.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d5857dc1b7f0fee86961de833f434e29494d72af102ce5355738c0664222bdf"
+dependencies = [
+ "gettext-sys",
+ "locale_config",
+]
+
+[[package]]
+name = "gettext-sys"
+version = "0.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ea859ab0dd7e70ff823032b3e077d03d39c965d68c6c10775add60e999d8ee9"
+dependencies = [
+ "cc",
+ "temp-dir",
+]
+
 [[package]]
 name = "ghash"
 version = "0.5.1"
@@ -2829,6 +2855,19 @@ version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "47d9d19d1d6efa0109d2f65ff4c85cddd50bd572e5a00127ab10987290bcefae"

+[[package]]
+name = "locale_config"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08d2c35b16f4483f6c26f0e4e9550717a2f6575bcd6f12a53ff0c490a94a6934"
+dependencies = [
+ "lazy_static",
+ "objc",
+ "objc-foundation",
+ "regex",
+ "winapi",
+]
+
 [[package]]
 name = "lock_api"
 version = "0.4.14"
@@ -2868,6 +2907,15 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4050469837a6ff301cd14c1f8f24f88549e6d548f24f64e2148eb0f72cebc51f"

+[[package]]
+name = "malloc_buf"
+version = "0.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62bb907fe88d54d8d9ce32a3cceab4218ed2f6b7d35617cafe9adf84e43919cb"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "matchers"
 version = "0.2.0"
@@ -3189,6 +3237,35 @@ dependencies = [
 "syn 2.0.119",
 ]

+[[package]]
+name = "objc"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "915b1b472bc21c53464d6c8461c9d3af805ba1ef837e1cac254428f4a77177b1"
+dependencies = [
+ "malloc_buf",
+]
+
+[[package]]
+name = "objc-foundation"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1add1b659e36c9607c7aab864a76c7a4c2760cd0cd2e120f3fb8b952c7e22bf9"
+dependencies = [
+ "block",
+ "objc",
+ "objc_id",
+]
+
+[[package]]
+name = "objc_id"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c92d4ddb4bd7b50d730c215ff871754d0da6b2178849f8a2a2ab69712d0c073b"
+dependencies = [
+ "objc",
+]
+
 [[package]]
 name = "ocb3"
 version = "0.1.0"
@@ -3312,6 +3389,31 @@ dependencies = [
 "system-deps 9.0.0",
 ]

+[[package]]
+name = "pangocairo"
+version = "0.22.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd199a0fef965b3ebda91a929a1ab5e7729538882c68e8de38e1904d2e094757"
+dependencies = [
+ "cairo-rs",
+ "glib",
+ "pango",
+ "pangocairo-sys",
+]
+
+[[package]]
+name = "pangocairo-sys"
+version = "0.22.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a649a616d67ae68539bc85f00fb45d36fba742ed20fc20e6712a15d8ee52bd3f"
+dependencies = [
+ "cairo-sys-rs",
+ "glib-sys",
+ "libc",
+ "pango-sys",
+ "system-deps 9.0.0",
+]
+
 [[package]]
 name = "parking"
 version = "2.2.1"
@@ -3372,7 +3474,7 @@ checksum = "2ee67f1008b1ba2321834326597b8e186293b049a023cdef258527550b9935b4"

 [[package]]
 name = "pdfs-cli"
-version = "1.11.1"
+version = "2.10.0"
 dependencies = [
 "anyhow",
 "clap",
@@ -3387,7 +3489,7 @@ dependencies = [

 [[package]]
 name = "pdfs-core"
-version = "1.11.1"
+version = "2.10.0"
 dependencies = [
 "async-trait",
 "dbus-secret-service-keyring-store",
@@ -3411,8 +3513,9 @@ dependencies = [

 [[package]]
 name = "pdfs-fuse"
-version = "1.11.1"
+version = "2.10.0"
 dependencies = [
+ "async-trait",
 "base64 0.23.1",
 "fuser",
 "futures",
@@ -3426,20 +3529,24 @@ dependencies = [
 "sha1 0.11.0",
 "tokio",
 "tracing",
+ "tracing-subscriber",
 "zip",
 ]

 [[package]]
 name = "pdfs-gui"
-version = "1.11.1"
+version = "2.10.0"
 dependencies = [
 "anyhow",
 "async-channel",
+ "gettext-rs",
 "gtk4",
 "kamadak-exif",
 "ksni",
 "libadwaita",
+ "pangocairo",
 "pdfs-core",
+ "reqwest",
 "serde",
 "serde_json",
 "tokio",
@@ -3668,9 +3775,9 @@ dependencies = [

 [[package]]
 name = "proton-drive-rs"
-version = "0.6.5"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46cbe05623d9b73bd48b1473f42d43180142b2ee676b1cb9e9a06b562c60ba26"
+checksum = "d6ce113d234474821d34787436ee80e1458e3d8a8f97212219615ed315eb70be"
 dependencies = [
 "async-trait",
 "base64 0.23.1",
@@ -3695,9 +3802,9 @@ dependencies = [

 [[package]]
 name = "proton-sdk"
-version = "0.6.5"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7310d93bed440dfe4fd60306923f6a491901ee0d618b65ace4e5e22ff0387c1f"
+checksum = "2a33c67df9694f90ce60e5b34984275956244138511b4640ca0d100e1dac8b3d"
 dependencies = [
 "aes-gcm 0.11.1",
 "async-trait",
@@ -4055,6 +4162,18 @@ dependencies = [
 "syn 3.0.5",
 ]

+[[package]]
+name = "regex"
+version = "1.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f020237b6c8eed93db2e2cb53c00c60a8e1bc73da7d073199a1180401450218d"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
 [[package]]
 name = "regex-automata"
 version = "0.4.18"
@@ -4796,6 +4915,12 @@ version = "0.13.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "adb6935a6f5c20170eeceb1a3835a49e12e19d792f6dd344ccc76a985ca5a6ca"

+[[package]]
+name = "temp-dir"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83176759e9416cf81ee66cb6508dbfe9c96f20b8b56265a39917551c23c70964"
+
 [[package]]
 name = "tempfile"
 version = "3.27.0"
@@ -3,20 +3,20 @@ resolver = "2"
 members = ["crates/pdfs-core", "crates/pdfs-fuse", "crates/pdfs-cli", "crates/pdfs-gui"]

 [workspace.package]
-version = "1.11.1"
+version = "2.10.0"
 edition = "2024"
 license = "MIT"
 authors = ["Nils Pukropp <contact@narl.io>"]
 rust-version = "1.96"
 repository = "https://github.com/narrrl/proton-drive-linux"
-homepage = "https://github.com/narrrl/proton-drive-linux"
+homepage = "https://proton-drive.narl.io"
 readme = "README.md"
 keywords = ["proton", "drive", "fuse", "sync", "linux"]
 categories = ["filesystem", "command-line-utilities"]

 [workspace.dependencies]
-proton-sdk = { version = "0.6.5" }
-proton-drive-rs = { version = "0.6.5" }
+proton-sdk = { version = "0.7.2" }
+proton-drive-rs = { version = "0.7.2" }

 # Internal crates.
 pdfs-core = { path = "crates/pdfs-core" }
@@ -4,488 +4,164 @@

 # Proton Drive for Linux

-**Files-on-demand Proton Drive for the Linux desktop** — a FUSE virtual mount with block-level
-caching, a scriptable CLI, and a native GTK4 app with tray and search launcher.
+**Proton Drive on the Linux desktop.** Your files as a folder that downloads on demand, synced
+local folders, Photos, sharing, and a native GTK4 app with tray and search launcher, plus a
+scriptable CLI.
+
+**[proton-drive.narl.io](https://proton-drive.narl.io)**

 [![CI](https://github.com/narrrl/proton-drive-linux/actions/workflows/ci.yml/badge.svg)](https://github.com/narrrl/proton-drive-linux/actions/workflows/ci.yml)
 [![Release](https://img.shields.io/github/v/release/narrrl/proton-drive-linux?sort=semver)](https://github.com/narrrl/proton-drive-linux/releases/latest)
+[![AUR](https://img.shields.io/aur/version/proton-drive-for-linux)](https://aur.archlinux.org/packages/proton-drive-for-linux)
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 [![Rust 1.96+](https://img.shields.io/badge/rust-1.96%2B-orange.svg)](https://www.rust-lang.org)
-[![Platform: Linux](https://img.shields.io/badge/platform-linux-lightgrey.svg)](#prerequisites)

-<img src="images/files.png" alt="The GTK4 file browser" width="820">
+<img src="images/files.png" alt="My files in the Proton Drive app" width="820">

 </div>

 > [!IMPORTANT]
 > This is an **unofficial**, community-built client. It is not affiliated with, endorsed by, or
 > supported by Proton AG. "Proton" and "Proton Drive" are trademarks of Proton AG, used here only
-> to describe what the software talks to. Use a test account first, and read
-> [`docs/RECOVERY.md`](docs/RECOVERY.md) before trusting it with data you cannot lose.
-
-## Install
-
-```bash
-# Debian / Ubuntu
-sudo apt install ./proton-drive-linux_*.deb
-
-# Fedora
-sudo dnf install ./proton-drive-linux-*.rpm
-
-# Arch Linux
-cd packaging && makepkg -fi
-```
-
-Packages for each release are attached to the [latest
-release](https://github.com/narrrl/proton-drive-linux/releases/latest); see
-[Installation & Packages](#installation--packages) for details and
-[Building from Source](#building-from-source) to compile it yourself.
-
-```bash
-pdfs login          # sign in (SRP + 2FA, credentials go to the system keyring)
-pdfs status         # mount state, queued writes, cache usage
-pdfs-app            # the desktop app
-```
-
-## Contents
-
- [Features](#features) · [Quick search](#quick-search-and-media-opening) · [Opening files](#choosing-how-files-open)
- [Selective sync](#selective-sync-pdfsignore) · [Diagnostics](#diagnostics--maintenance) · [Scripting](#scripting---json)
- [Performance](#performance--caching) · [Filesystem safety](#filesystem-safety) · [Screenshots](#screenshots)
- [Prerequisites](#prerequisites) · [Building](#building-from-source) · [Packages](#installation--packages) · [Releases](#automated-releases-cicd)
-
-**Documentation:** [Architecture](docs/ARCHITECTURE.md) · [Testing](docs/TESTING.md) ·
-[Recovery](docs/RECOVERY.md) · [Development](docs/DEVELOPMENT.md) ·
-[Known issues](docs/BUGS.md) · [Changelog](docs/CHANGELOG.md) ·
-[Contributing](CONTRIBUTING.md) · [Security policy](SECURITY.md)
+> to describe what the software talks to. Try it with data you have another copy of first, and
+> read [what survives a lost machine](docs/RECOVERY.md) before you rely on it.

 ## Features

- **Files-on-Demand (FUSE)**: Mount your Proton Drive as a virtual filesystem where files are downloaded only when opened, utilizing smart block-level caching and disk-backed writes.
- **Command-Line Interface (CLI)**: Manage your drive, authenticate, and monitor sync status directly from the terminal.
- **Non-Blocking GTK4 Desktop App**: Browse files, manage pins, configure options, and monitor active transfers through a modern, native GUI with a fully non-blocking asynchronous main loop.
- **File Thumbnails**: Browse locally cached image previews in Files, Shared, and Trash, including embedded previews from camera RAW files. Build a whole folder tree from the Files toolbar and resize the grid from the status bar.
- **Shared Links & Invites**: Browse files shared with you by other users, and view/manage your own public shared links directly in the GUI.
- **Local Backup (Computers)**: Sync and back up local directories (like Downloads, Documents, Pictures, etc.) directly to your Proton Drive account.
- **Locations**: One page (and `pdfs locations`) listing every place Proton Drive occupies on this machine — the main mount plus each backed-up folder — with its mode, sync state, and whether it is read-only. Switching a folder between a full local copy and on-demand happens here.
- **System Tray Integration**: Background indicator for status monitoring, quick actions, and fast sync controls.
- **Unified Search Launcher (HUD)**: A resident Google Drive-style launcher (`pdfs-prompt`) that searches Proton Drive and local files together, ranks the best matches, tolerates abbreviations and typos, and is ideal for a system-wide hotkey. It can also present the same search in your own launcher (`--dmenu`) or, searching live as you type, in `fzf` (`--fzf`).
- **Secure Credential Storage**: Integrates with the system Secret Service (GNOME Keyring, KWallet, etc.) with smart in-memory credential caching to avoid UI thread blockages.
- **Proton Photos Support**: Access your Proton Photos timeline, view thumbnails, and download backed-up media natively (available in the GUI as a navigation tab and via the CLI).
- **File Version History**: Every revision Proton Drive still holds for a file, from the browser's details pane (**Versions**) or `pdfs versions list|restore|save|rm`. Restoring is server-side — no re-upload — and an old version can be written out to a local file without touching the live one.
- **Photo Favourites**: Star a photo in the lightbox, filter the gallery to favourites, or use `pdfs favorite <uid>` / `pdfs photos --favorites`.
- **Photo Albums**: Browse your albums — including the ones shared with you — from the Albums view of the Photos page, or with `pdfs albums` / `pdfs album <uid>`. Album contents open in the same gallery as the timeline.
- **Human Verification (CAPTCHA) Recovery**: Detects sign-in gates (VPN/new IP challenges) and launches an embedded `WebKitWebView` dialog to safely complete the challenge, transparently retrying authentication with the earned token.
- **Selective Sync (`.pdfsignore`)**: Keep build trees, dependency directories, and editor leftovers out of synced folders using gitignore-style rules.
- **Data-Safe Offline Writes**: Durable scratch/staging files and a transactional pending queue preserve acknowledged writes across network failures and restarts.
+**Files**

-## Quick Search and Media Opening
+- **Your Drive as a folder.** `~/ProtonDrive` works with every program. Files download when they
+  are opened, a block at a time, so a video starts playing and a large archive can be read
+  without fetching all of it.
+- **Available offline.** Keep chosen files and folders fully downloaded; everything else is
+  cached within a size limit you set.
+- **Synced folders.** Back up folders such as `~/Documents` under your computer in Proton Drive,
+  as a full two-way copy or online only. Gitignore-style `.pdfsignore` rules, conflict copies
+  instead of overwrites, pause and bandwidth limits.
+- **Safe writes.** Changes are staged on disk and queued before they are acknowledged, so they
+  survive a lost connection, a crash or a reboot and upload when they can.

-`pdfs-prompt` searches Drive metadata and the local home-directory index in one request. Results are ranked together rather than split by source. Matching is case-insensitive and supports exact names, prefixes, parent paths, multiple terms, punctuation-separated words, ordered abbreviations, common typos, and adjacent transpositions.
+**Desktop app**

-The prompt stays resident after its first launch, so invoking the shortcut again reuses and resets the existing window. Drive folders open from the mount. Audio and video results also open through FUSE, allowing media players to seek and request ranges without downloading the entire file first; ordinary Drive files are materialized into the local cache before opening.
+- **Browse** My files, Shared with me, Shared by me, Computers and Trash, with thumbnails
+  (including camera RAW), drag and drop, details and **version history**.
+- **Photos.** Timeline with favorites, albums, and Places on a map; RAW+JPEG pairs shown as one
+  photo; duplicate finder; slideshow; **import from Google Photos** (Takeout).
+- **Sharing.** Invite people as viewer, editor or admin, create public links with password and
+  expiry, accept invitations.
+- **Sync overview.** What is uploading, what is waiting, what failed and why, and a history of
+  what happened.
+- **Tray icon** with status, pause and quick actions, and a **search launcher** (`pdfs-prompt`)
+  that searches Proton Drive and your home folder together, as its own window, through fuzzel,
+  rofi or wofi, or live in `fzf`.
+- **Restore a computer.** Continue a backup on a new machine and bring its folders back in one
+  step.
+- **Sign-in** with two-factor authentication and CAPTCHA; the session is kept in the system
+  keyring.
+- Available in English, German, Spanish, French, Italian, Dutch, Polish and Brazilian
+  Portuguese.

-### Using your own launcher (fuzzel, rofi, wofi, …)
+**Command line**

-`pdfs-prompt --dmenu` runs the same search through an external dmenu-style
-launcher instead of the built-in window, so the HUD matches the rest of a
-tiling-WM desktop:
+- About 55 `pdfs` commands cover files, sync, sharing, Photos, Trash, versions and diagnostics.
+  Query commands print JSON with `--json`.

-```bash
-pdfs-prompt --dmenu                                   # fuzzel/rofi/wofi/tofi/bemenu/dmenu, whichever is installed
-pdfs-prompt --dmenu --menu 'fuzzel --dmenu --width 60'
-pdfs-prompt --dmenu --query invoice                   # skip straight to a search
-```
+## Install

-A launcher filters a fixed list — it cannot ask for a new one per keystroke — so
-searching takes two steps, and the prompt says which step you are on:
-
- `Search Drive ›` lists your pinned files. Type anything that isn't one of them
-  and press Enter to search for it.
- `Drive: invoice ›` lists the results. Enter opens one; typing something else
-  and pressing Enter searches again. Escape closes.
-
-`--query` skips the first step. fuzzel and rofi also get file-type icons.
-
-To make an existing keybinding use it without re-binding, and to pin the
-launcher command, set them in `config.json`:
-
-```json
-{
-  "prompt": {
-    "mode": "dmenu",
-    "menu": ["fuzzel", "--dmenu", "--width", "60"],
-    "menu_limit": 50
-  }
-}
-```
-
-`--gtk` overrides `"mode": "dmenu"` for one invocation. A `{prompt}` token
-anywhere in `menu` is replaced by the prompt text; without one, the launcher's
-own prompt flag is appended.
-
-### Live launcher search (fzf)
-
-The two-step above exists because no dmenu-style launcher can call back for new
-results per keystroke. `fzf` can, so `pdfs-prompt --fzf` searches as you type,
-exactly like the built-in window:
-
-```bash
-pdfs-prompt --fzf                    # pinned files, then live results as you type
-pdfs-prompt --fzf --query invoice    # start on a search
-```
-
-Every keystroke re-queries the daemon (debounced, like the GTK prompt) and fzf's
-own matcher is switched off, so the ordering you see is the daemon's ranking —
-abbreviations and typos included, which a launcher filtering a fixed list cannot
-do. Enter opens; Escape closes.
-
-fzf is a terminal program, so when it is started without one — from a WM
-keybinding — it spawns a terminal for itself: foot, ghostty, kitty, alacritty,
-wezterm or xterm, whichever is installed. Each is launched with the app-id/class
-`pdfs-prompt`, so one window rule floats it whichever terminal you have. In
-Hyprland:
-
-```
-windowrulev2 = float, class:^(pdfs-prompt)$
-windowrulev2 = size 900 500, class:^(pdfs-prompt)$
-windowrulev2 = center, class:^(pdfs-prompt)$
-bind = SUPER, space, exec, pdfs-prompt --fzf
-```
-
-Set it as the default front end, and pick the terminal explicitly, in
-`config.json`:
-
-```json
-{
-  "prompt": {
-    "mode": "fzf",
-    "terminal": ["foot", "--app-id=pdfs-prompt", "--"],
-    "menu_limit": 50
-  }
-}
-```
-
-A `{cmd}` token anywhere in `terminal` is replaced by the command to run;
-without one it is appended, which is what every detected terminal expects.
-
-## Choosing How Files Open
-
-By default every result is handed to `xdg-open`. An `open_with` block in
-`config.json` overrides that per file type — for instance opening text in
-Neovim inside Alacritty, while everything else still goes to the desktop:
-
-```json
-{
-  "open_with": {
-    "terminal": ["alacritty", "-e"],
-    "rules": [
-      { "match": ["@text"], "command": ["nvim"], "terminal": true },
-      { "match": ["*.png", "*.jpg"], "command": ["imv"] }
-    ]
-  }
-}
-```
-
- `match` takes file-name globs (`*.md`, `notes-*.txt`) or the classes `@dir`,
-  `@text`, `@document`, `@image`, `@media`, `@any`. First matching rule wins.
- `command` is argv, not a shell line. A `{}` token is replaced by the path;
-  without one the path is appended. `$VAR` tokens expand from the environment,
-  so `["$EDITOR"]` follows your editor.
- `"terminal": true` wraps the command in `terminal`. When that is unset, the
-  terminal comes from `$PDFS_TERMINAL`, then `$TERMINAL`, then the first known
-  emulator on `PATH`; a bare name like `TERMINAL=alacritty` gains the right
-  "run this" flag automatically.
- `"default": [...]` replaces `xdg-open` for everything unmatched.
-
-The rules apply to the prompt (both front ends) and to the GTK browser, so a
-file opens the same way wherever it was picked. Patterns are matched against the
-Drive name — a downloaded file is stored in the cache under its content hash,
-which says nothing about its type, so matching that would send everything to
-`xdg-open`.
-
-## Selective Sync (`.pdfsignore`)
-
-Two-way synced folders skip paths matched by ignore rules, so syncing a project
-directory does not upload `node_modules/`, `target/`, or `.git/`.
-
-Rules come from two places, and both apply:
-
-1. **Per folder** — a `.pdfsignore` file at the root of the synced folder
-   (`.protonignore` also works). Gitignore syntax, including negation:
-
-   ```gitignore
-   # everything build-related
-   build/
-   *.log
-
-   # ...except this one
-   !important.log
-   ```
-
-2. **Globally** — an `ignore_patterns` list in `config.json`, applied to every
-   synced folder. When unset, sensible defaults apply: `.git/`, `.hg/`, `.svn/`,
-   `node_modules/`, `target/`, `.venv/`, `__pycache__/`, `*~`, `*.swp`, `*.tmp`,
-   `.DS_Store`, and `Thumbs.db`.
-
-   ```json
-   {
-     "ignore_patterns": ["node_modules/", "target/", "*.iso"]
-   }
-   ```
-
-   Set it to `[]` to opt out of the defaults entirely.
-
-Rules are re-read at the start of every sync pass, so edits take effect on the
-next pass without restarting the daemon.
-
-**Ignoring is never destructive.** If a rule starts matching a file that was
-already synced, its copy on Drive is left untouched — the file simply stops
-being tracked. Removing the rule later picks the existing remote file back up
-rather than re-uploading it.
-
-## Diagnostics & Maintenance
-
-When something looks wrong, `pdfs diagnose` checks the installation and prints a
-report. It runs without a daemon on purpose — the state worth diagnosing is
-usually the state where the daemon will not start:
-
-```console
-$ pdfs diagnose
-Paths
-[ok  ]   state dir: /home/you/.local/state/proton-drive-linux
-[ok  ]   database: /home/you/.local/state/proton-drive-linux/cache.db (170.3 MiB)
-
-Account
-[ok  ]   keyring session: you@proton.me
-
-Daemon
-[ok  ]   daemon responding
-[ok  ]   mounted at: /home/you/ProtonDrive
-[ok  ]   queued writes: none
-
-No problems found.
-```
-
-It exits non-zero if any check fails, so it works in a health-check script.
-
-For the local metadata database and content cache:
-
-| Command | What it does |
+| Distribution | Package |
 |---|---|
-| `pdfs cache inspect` | Database size, reclaimable space, per-table row counts, cache usage against budget |
-| `pdfs cache inspect --deep` | Also runs SQLite's integrity check — reads every page, so it is slow on a large database |
-| `pdfs cache vacuum` | Checkpoints the write-ahead log and compacts the database |
-| `pdfs cache clear` | Deletes cached file content, keeping pinned files |
+| Debian, Ubuntu 24.04 or newer | `.deb` from the [latest release](https://github.com/narrrl/proton-drive-linux/releases/latest) |
+| Fedora 44 or newer | `.rpm` from the [latest release](https://github.com/narrrl/proton-drive-linux/releases/latest) |
+| Arch Linux | [`proton-drive-for-linux`](https://aur.archlinux.org/packages/proton-drive-for-linux) (also `-bin` and `-git`) in the AUR |
+| Anything else | [Build from source](docs/INSTALL.md#build-from-source) |

-`vacuum` takes a write lock for its duration and needs room for a second copy of
-the database while it runs, so it is a deliberate operation rather than
-something the daemon does on a timer.
-
-Before a release, run the real-kernel acceptance suite against a dedicated test
-account and mount. See [`docs/TESTING.md`](docs/TESTING.md); it includes optional
-two-mount convergence checks and confines destructive operations to a fresh
-test directory.
-
-## Scripting (`--json`)
-
-Query commands accept a global `--json` flag and emit machine-readable output:
-
-```console
-$ pdfs --json sync list | jq '.items[] | select(.state != "idle") | .local_path'
-$ pdfs --json cache inspect | jq '.db_reclaimable_bytes'
-$ pdfs --json status | jq -r '.mount.mountpoint'
+```bash
+sudo apt install ./proton-drive-linux_*.deb        # Debian, Ubuntu
+sudo dnf install ./proton-drive-linux-*.rpm        # Fedora
+paru -S proton-drive-for-linux                     # Arch
 ```

-Supported on `status`, `ls`, `pins`, `sync list`, `devices list`, `transfers`,
-`activity`, and `cache inspect`. Commands that perform an action keep their
-human output — a script that needs to know whether one worked has the exit code.
+Then open **Proton Drive** from your applications menu and sign in. The app starts the background
+service, and your files appear in `~/ProtonDrive`.

-Two things worth relying on:
+Signing in from a terminal instead? `pdfs login` stores the session but does not start the
+service. Enable it once:

- **The payload is unwrapped.** Output is `{"items": […]}`, not the daemon's
-  internal `{"SyncFolders": {"items": […]}}`, so scripts never name an internal
-  variant.
- **Errors still fail.** A daemon-side error prints its JSON body (with a
-  machine-readable `kind`) on stdout *and* exits non-zero, so `set -e` and
-  `if pdfs …` behave as expected rather than treating a failed lookup as
-  success.
+```bash
+pdfs login
+systemctl --user enable --now proton-drive.service
+pdfs status
+```

-## Performance & Caching
+[docs/INSTALL.md](docs/INSTALL.md) has the requirements, optional extras (tray on GNOME, RAW and
+video thumbnails), headless use and uninstalling.

-The client includes several optimizations designed for high efficiency, a low memory footprint, and a responsive user experience:
+## Documentation

- **On-Demand Block Cache**: Files are read in fixed 4 MiB blocks. For unpinned files, the client fetches and caches only the blocks containing the requested byte ranges. This enables fast sequential and sparse reads (e.g. media streaming or metadata scanning) without downloading entire files.
- **Disk-Backed Writes**: Large file writes are staged on disk in temporary scratch files (rather than fully buffered in RAM) and track modified byte intervals. Only the unedited remote segments are fetched at commit time, keeping memory usage minimal.
- **Non-Blocking GTK4 Loop**: To prevent UI freezes, all synchronous D-Bus credential checks, control socket requests, and cache usage calculations are offloaded to background worker threads or fetched asynchronously.
- **Flicker-Free UI Rendering**: The GTK4 application performs differential rendering of the pins list, only modifying list rows when the list content changes, preserving the user's scroll position and widget focus.
- **Durable Staging**: Scratch metadata and staged writes are synced and atomically published before an upload is acknowledged locally. Rapid revisions supersede pending work transactionally.
-
-## Filesystem Safety
-
-Version 1.0 strengthens the boundaries around local-only data and destructive reconciliation:
-
- Truncate composes with queued revisions, preserving the authoritative prefix and correct zero-filled growth.
- Combined move-and-rename operations are queued durably and tolerate partially completed remote state.
- Session tombstones prevent successfully unlinked entries from reappearing through eventually consistent listings.
- Names are valid UTF-8 and no longer than Linux's 255-byte component limit.
- Incomplete mirror scans are non-destructive, and total-wipe protection covers every non-empty baseline.
- Failed conflict preservation, local deletion, or staging publication does not settle a new baseline or discard the only local copy.
- State, cache, and config directories must be real, current-user-owned `0700` directories; control sockets are `0600`.
+| | |
+|---|---|
+| [User guide](docs/USER_GUIDE.md) | Everything the app, tray and launcher do |
+| [Command-line reference](docs/CLI.md) | Every `pdfs` command and scripting with `--json` |
+| [Configuration](docs/CONFIGURATION.md) | `config.json`, file locations, environment variables, the service |
+| [Troubleshooting](docs/TROUBLESHOOTING.md) | Diagnosing problems and fixing common ones |
+| [Recovering on a new computer](docs/RECOVERY.md) | Getting your synced folders back after a reinstall or a lost machine |
+| [Changelog](docs/CHANGELOG.md) | What changed in each release |

+For contributors: [development guide](docs/DEVELOPMENT.md), [architecture](docs/ARCHITECTURE.md),
+[testing](docs/TESTING.md), [translating](docs/TRANSLATING.md), [roadmap](docs/ROADMAP.md) and the
+[bug ledger](docs/BUGS.md). The [documentation index](docs/README.md) lists everything.

 ## Screenshots

-### GUI Application & Launcher
-
 <table>
  <tr>
-    <td align="center" width="50%"><img src="images/login.png" alt="Login Screen" width="100%"><br><sub><b>Login Screen</b></sub></td>
-    <td align="center" width="50%"><img src="images/files.png" alt="Files Browser" width="100%"><br><sub><b>Files Browser</b></sub></td>
+    <td align="center" width="50%"><img src="images/files.png" alt="My files" width="100%"><br><sub><b>My files</b></sub></td>
+    <td align="center" width="50%"><img src="images/photos.png" alt="Photos timeline" width="100%"><br><sub><b>Photos</b></sub></td>
  </tr>
  <tr>
-    <td align="center" width="50%"><img src="images/shared.png" alt="Shared Links" width="100%"><br><sub><b>Shared Links</b></sub></td>
-    <td align="center" width="50%"><img src="images/shared_with_me.png" alt="Shared with me" width="100%"><br><sub><b>Shared with me</b></sub></td>
+    <td align="center" width="50%"><img src="images/photos_map.png" alt="Photos places map" width="100%"><br><sub><b>Places</b></sub></td>
+    <td align="center" width="50%"><img src="images/computers.png" alt="Computers" width="100%"><br><sub><b>Computers</b></sub></td>
  </tr>
  <tr>
-    <td align="center" width="50%"><img src="images/computers.png" alt="Local Backups (Computers)" width="100%"><br><sub><b>Local Backups (Computers)</b></sub></td>
-    <td align="center" width="50%"><img src="images/photos.png" alt="Photos Timeline" width="100%"><br><sub><b>Photos Timeline</b></sub></td>
+    <td align="center" width="50%"><img src="images/sync.png" alt="Sync folders" width="100%"><br><sub><b>Sync</b></sub></td>
+    <td align="center" width="50%"><img src="images/conflicts.png" alt="Sync history showing resolved conflicts" width="100%"><br><sub><b>Sync history</b></sub></td>
  </tr>
  <tr>
-    <td align="center" width="50%"><img src="images/prompt.png" alt="Search Launcher Prompt" width="100%"><br><sub><b>Search Launcher Prompt</b></sub></td>
-    <td align="center" width="50%"><img src="images/settings.png" alt="Settings" width="100%"><br><sub><b>Settings</b></sub></td>
+    <td align="center" width="50%"><img src="images/prompt_gtk.png" alt="Search launcher" width="100%"><br><sub><b>Search launcher</b></sub></td>
+    <td align="center" width="50%"><img src="images/prompt_fzf.png" alt="Search launcher in fzf" width="100%"><br><sub><b>Search launcher in fzf</b></sub></td>
+  </tr>
+  <tr>
+    <td align="center" width="50%"><img src="images/login.png" alt="Sign in" width="100%"><br><sub><b>Sign in</b></sub></td>
+    <td></td>
  </tr>
 </table>

---
+## How it works

-## Prerequisites
+A background service (`proton-drive.service`, the `pdfs daemon` command) holds your session,
+mounts `~/ProtonDrive` through FUSE, runs the upload queue and the sync engine, and follows
+Proton's event stream for changes made elsewhere. The app, the tray, the launcher and the CLI are
+clients of that service over a local socket. Everything is end-to-end encrypted with your Proton
+keys before it leaves the machine, through a Rust implementation of Proton's Drive SDK.

-To compile the application from source or run the built binaries, ensure you have the following system libraries installed on your distribution:
-
-### Ubuntu / Debian (24.04+)
-```bash
-sudo apt-get update
-sudo apt-get install -y \
-  pkg-config \
-  libfuse3-dev \
-  libgtk-4-dev \
-  libadwaita-1-dev \
-  libwebkitgtk-6.0-dev \
-  libsecret-1-dev \
-  libdbus-1-dev \
-  libimage-exiftool-perl
-```
-
-### Arch Linux
-```bash
-sudo pacman -S --needed pkgconf fuse3 gtk4 libadwaita libsecret dbus webkitgtk-6.0 perl-image-exiftool
-```
-
-### Fedora (44+)
-```bash
-sudo dnf install -y \
-  pkgconf-pkg-config fuse3-devel gtk4-devel libadwaita-devel \
-  webkitgtk6.0-devel libsecret-devel dbus-devel glib2-devel \
-  perl-Image-ExifTool cargo rust
-```
-
-Runtime extras (pick your desktop):
-```bash
-# GNOME — keyring + tray (AppIndicator)
-sudo dnf install -y gnome-keyring gnome-shell-extension-appindicator xdg-utils
-
-# KDE Plasma — KWallet (Secret Service); tray works via built-in SNI
-sudo dnf install -y kwallet xdg-utils
-```
-
---
-
-## Building from Source
-
-Ensure you have Rust and Cargo installed (minimum supported Rust version is 1.96).
-
-1. Clone the repository and navigate into the project directory:
-   ```bash
-   git clone https://github.com/narrrl/proton-drive-linux.git
-   cd proton-drive-linux
-   ```
-2. Build the workspace in release mode:
-   ```bash
-   cargo build --release --locked
-   ```
-
-The compiled binaries will be available under `target/release/`:
- `pdfs`: The CLI utility.
- `pdfs-app`: The GTK4 application.
- `pdfs-tray`: The tray status notifier.
- `pdfs-prompt`: The launcher prompt for quick HUD search.
-
---
-
-## Installation & Packages
-
-### 1. Debian / Ubuntu (.deb)
-Install the debian package via `dpkg` or `apt`:
-```bash
-sudo apt install ./proton-drive-linux_*.deb
-```
-
-### 2. Arch Linux
-A local `PKGBUILD` is available under the `packaging/` directory. You can build and install it using:
-```bash
-cd packaging && makepkg -fi
-```
-
-### 3. Fedora (local RPM)
-A local `.spec` is available under `packaging/`. From the repository root:
-```bash
-sudo dnf install -y rpm-build
-rpmbuild -bb packaging/proton-drive-linux.spec \
-  --define "git_dir $PWD" \
-  --define "_rpmdir $PWD/packaging/out" \
-  --define "_builddir $PWD/packaging/build" \
-  --define "_sourcedir $PWD" \
-  --define "_specdir $PWD/packaging" \
-  --define "_srcrpmdir $PWD/packaging/out"
-sudo dnf install packaging/out/x86_64/proton-drive-linux-*.rpm
-```
-
---
-
-## Automated Releases (CI/CD)
-
-This project has a GitHub Actions CI workflow configured under `.github/workflows/release.yml`.
-
-### How it works:
-1. **Triggers**: 
-   - Pushing a git tag matching `v*` (e.g. `git tag v0.1.0 && git push origin v0.1.0`).
-   - Manual runs via the **Actions** tab in GitHub (**workflow_dispatch**).
-2. **Quality Gates and Build Process**:
-   - For tagged builds, verifies that the tag, workspace version, and `packaging/PKGBUILD` version agree.
-   - Runs `cargo fmt`, Clippy with warnings denied, the locked workspace test suite, and the account-free FUSE acceptance contract.
-   - Spawns an Ubuntu runner and installs GTK4, Libadwaita, FUSE3, and Secret Service packages.
-   - Sets up the Rust compiler and caches build targets to speed up runs.
-   - Compiles the workspace members in release mode.
-3. **Artifact Packaging**:
-   - Generates a `.tar.gz` containing the raw binaries (`pdfs`, `pdfs-app`, `pdfs-tray`, `pdfs-prompt`).
-   - Packs them into Debian (`.deb`) and Fedora (`.rpm`) packages.
-   - Includes the systemd user service and tray autostart entry in the Debian package.
-4. **Publishing**:
-   - Creates a GitHub Release matching the pushed tag and uploads the `.deb`, `.rpm`, and `.tar.gz` packages as release assets.
-   - For manual runs, compiles and exposes the packages as workflow run artifacts for testing.
-
---
+Files you open are decrypted into a local cache so programs can read them. What that means for
+the security of the machine is spelled out in the
+[threat model](docs/ARCHITECTURE.md#8-threat-model-what-this-client-writes-to-disk-in-plaintext).

 ## Contributing

-Bug reports, packaging fixes, and patches are welcome — see [CONTRIBUTING.md](CONTRIBUTING.md) for
-the workflow and the quality gates CI enforces, and [SECURITY.md](SECURITY.md) for reporting a
-vulnerability privately.
+Bug reports, translations and patches are welcome. See [CONTRIBUTING.md](CONTRIBUTING.md) for the
+workflow and the checks CI runs, and [SECURITY.md](SECURITY.md) to report a vulnerability
+privately.

 ## License

 Released under the [MIT License](LICENSE).

+The Places map uses [GeoNames](https://www.geonames.org/) data (CC BY 4.0) and
+[Natural Earth](https://www.naturalearthdata.com/) outlines (public domain). The optional street
+map comes from [OpenFreeMap](https://openfreemap.org/), © [OpenStreetMap](https://www.openstreetmap.org/copyright)
+contributors.
+
 Proton Drive is a service of Proton AG. This project is an independent client and carries no
 affiliation with or endorsement from Proton AG.
@@ -30,5 +30,10 @@ the interesting boundaries are:
 - **Cryptography.** Key derivation, signature handling, and anything that could publish plaintext
  or the wrong key material to Proton.

+What the client deliberately keeps in plaintext on disk, and why, is documented in the
+[threat model](docs/ARCHITECTURE.md#8-threat-model-what-this-client-writes-to-disk-in-plaintext).
+Behaviour described there is known and not a vulnerability by itself; a way to make it worse
+than described is.
+
 Out of scope: vulnerabilities in Proton's own service (report those to Proton AG), and issues that
 require an attacker who already has your user account on the machine.
@@ -13,12 +13,46 @@ use pdfs_core::auth;
 use pdfs_core::cache::ContentCache;
 use pdfs_core::config::AppDirs;
 use pdfs_core::control::{
-    ErrorKind, MountKind, RefreshScope, Request as CtlRequest, Response as CtlResponse,
-    RestoreItem as CtlRestoreItem, ShareEntryKind, SyncPhase, pending_summary,
+    ConflictKeep, ErrorKind, MountKind, RefreshScope, Request as CtlRequest,
+    Response as CtlResponse, RestoreItem as CtlRestoreItem, ShareEntryKind, SyncPhase,
+    pending_summary,
 };
 use pdfs_core::db::Db;
 use pdfs_core::service;

+/// `println!` for this binary, shadowing std's, which panics when stdout is
+/// closed: `pdfs ls | head` ended in a "Broken pipe" panic once `head` had its
+/// lines. This one hands the failure to [`stdout_written`] instead.
+///
+/// Restoring the default `SIGPIPE` would also stop the panic, but the same
+/// binary runs the daemon, which must not die when a socket's peer goes away.
+macro_rules! println {
+    ($($arg:tt)*) => {{
+        use std::io::Write as _;
+        $crate::stdout_written(writeln!(std::io::stdout(), $($arg)*))
+    }};
+}
+
+/// [`println!`] without the newline.
+macro_rules! print {
+    ($($arg:tt)*) => {{
+        use std::io::Write as _;
+        $crate::stdout_written(write!(std::io::stdout(), $($arg)*))
+    }};
+}
+
+/// Exit on a failed write to stdout. A closed pipe means the reader has all it
+/// wanted, so that exit is a success.
+fn stdout_written(result: std::io::Result<()>) {
+    if let Err(error) = result {
+        if error.kind() == std::io::ErrorKind::BrokenPipe {
+            std::process::exit(0);
+        }
+        eprintln!("Error: writing to stdout: {error}");
+        std::process::exit(1);
+    }
+}
+
 #[derive(Parser)]
 #[command(
    name = "pdfs",
@@ -29,7 +63,7 @@ struct Cli {
    /// Emit machine-readable JSON instead of formatted text.
    ///
    /// Applies to the query commands (`status`, `ls`, `pins`, `sync list`,
-    /// `devices list`, `locations`, `transfers`, `activity`, `cache inspect`). Commands that
+    /// `devices list`, `locations`, `transfers`, `activity`, `trash`, `cache inspect`). Commands that
    /// perform an action keep their human output — a script that needs to know
    /// whether one succeeded has the exit code.
    #[arg(long, global = true)]
@@ -145,11 +179,11 @@ enum Command {
        /// Skip this many photos from the start of the timeline.
        #[arg(long, default_value_t = 0)]
        offset: usize,
-        /// List only favourited photos.
+        /// List only favorited photos.
        #[arg(long)]
        favorites: bool,
    },
-    /// Add or remove a photo's favourite mark.
+    /// Add or remove a photo's favorite mark.
    Favorite {
        /// Photo node uid in `volume~link` form (from `pdfs photos`).
        uid: String,
@@ -187,7 +221,7 @@ enum Command {
    /// and rewrites them at the right time.
    ///
    /// Proton cannot edit a sealed capture time, so a rewrite means re-uploading
-    /// the photo and trashing the original — favourites and albums are carried
+    /// the photo and trashing the original — favorites and albums are carried
    /// across, and the original goes to Proton's trash, not away. Run it with
    /// `--dry-run` first.
    RedatePhotos {
@@ -229,6 +263,43 @@ enum Command {
        #[arg(long, default_value_t = 0)]
        offset: usize,
    },
+    /// Create a photo album and print its uid.
+    NewAlbum {
+        /// Album name.
+        name: String,
+    },
+    /// Rename a photo album.
+    RenameAlbum {
+        /// Album node uid in `volume~link` form (from `pdfs albums`).
+        uid: String,
+        /// New name.
+        name: String,
+    },
+    /// Delete a photo album. Its photos stay in the timeline.
+    DeleteAlbum {
+        /// Album node uid in `volume~link` form (from `pdfs albums`).
+        uid: String,
+        /// Also delete photos that exist only in this album (saved from a
+        /// shared album); without it the server refuses to delete such an album.
+        #[arg(long)]
+        with_photos: bool,
+    },
+    /// Add photos to an album.
+    AddToAlbum {
+        /// Album node uid in `volume~link` form (from `pdfs albums`).
+        uid: String,
+        /// Photo node uids (from `pdfs photos`).
+        #[arg(required = true)]
+        photos: Vec<String>,
+    },
+    /// Take photos out of an album. They stay in the timeline.
+    RemoveFromAlbum {
+        /// Album node uid in `volume~link` form (from `pdfs albums`).
+        uid: String,
+        /// Photo node uids (from `pdfs album <uid>`).
+        #[arg(required = true)]
+        photos: Vec<String>,
+    },
    /// Download a photo by uid (`volume~link`) and print its cached path.
    OpenPhoto {
        /// Photo node uid in `volume~link` form (from `pdfs photos`).
@@ -241,29 +312,40 @@ enum Command {
        /// Max hits to return.
        #[arg(long, default_value_t = 50)]
        limit: usize,
+        /// Only search below this folder (under the mountpoint).
+        #[arg(long = "in", value_name = "FOLDER")]
+        scope: Option<PathBuf>,
    },
    /// Rename a file or folder via the running daemon.
    Rename {
-        /// File/folder path, inside the mountpoint or relative to it.
+        /// File/folder path, inside My files or an on-demand synced folder, or
+        /// relative to the mountpoint.
        path: PathBuf,
        /// New name (a single path component).
        new_name: String,
    },
-    /// Move a file or folder into another folder via the running daemon.
+    /// Move files or folders into another folder via the running daemon.
+    ///
+    /// The paths may be in different locations: My files and any synced
+    /// folder, on-demand or mirrored. The move happens on Proton Drive, so
+    /// nothing is downloaded or uploaded again, unlike `mv` between two
+    /// locations. The last path is the destination folder.
    Move {
-        /// File/folder path, inside the mountpoint or relative to it.
-        path: PathBuf,
-        /// Destination folder path, inside the mountpoint or relative to it.
-        new_parent: PathBuf,
+        /// Files/folders to move, then the destination folder: each inside a
+        /// location, or relative to the mountpoint.
+        #[arg(required = true, num_args = 2.., value_name = "PATH")]
+        paths: Vec<PathBuf>,
    },
    /// Trash a file or folder via the running daemon.
    Rm {
-        /// File/folder path, inside the mountpoint or relative to it.
+        /// File/folder path, inside My files or an on-demand synced folder, or
+        /// relative to the mountpoint.
        path: PathBuf,
    },
    /// Create a folder via the running daemon.
    Mkdir {
-        /// Parent folder path, inside the mountpoint or relative to it.
+        /// Parent folder path, inside My files or an on-demand synced folder,
+        /// or relative to the mountpoint.
        parent: PathBuf,
        /// New folder name (a single path component).
        name: String,
@@ -327,6 +409,11 @@ enum Command {
        #[command(subcommand)]
        action: SyncCmd,
    },
+    /// List `(sync-conflict …)` copies, or resolve one.
+    Conflicts {
+        #[command(subcommand)]
+        action: Option<ConflictCmd>,
+    },
    /// Share a file or folder with Proton and/or external email addresses.
    Share {
        /// File/folder path, inside the mountpoint or relative to it.
@@ -357,14 +444,18 @@ enum Command {
        /// New role: viewer, editor or admin.
        role: String,
    },
-    /// Remove a member or pending invitation from a node's share.
+    /// Stop sharing a node, or remove one member or pending invitation.
+    ///
+    /// With only a path, removes the public link, every invitation and every
+    /// member. With an id and kind (from `pdfs members`), removes that entry.
    Unshare {
        /// File/folder path, inside the mountpoint or relative to it.
        path: PathBuf,
        /// Entry id (membership or invitation id), from `pdfs members`.
-        id: String,
+        #[arg(requires = "kind")]
+        id: Option<String>,
        /// Entry kind: member, proton or external.
-        kind: ShareKindArg,
+        kind: Option<ShareKindArg>,
    },
    /// Inspect and restore a file's earlier versions.
    Versions {
@@ -521,6 +612,22 @@ enum DeviceCmd {
    },
 }

+#[derive(Subcommand)]
+enum ConflictCmd {
+    /// Decide which side of a conflict to keep. Whatever is removed goes to Trash.
+    Resolve {
+        /// The conflict copy, absolute or relative to the mountpoint.
+        path: PathBuf,
+        /// `original` trashes the copy; `copy` trashes the original and gives the
+        /// copy its name; `both` renames the copy to `--name`.
+        #[arg(long, value_parser = ["original", "copy", "both"])]
+        keep: String,
+        /// New name for the copy with `--keep both`.
+        #[arg(long, required_if_eq("keep", "both"))]
+        name: Option<String>,
+    },
+}
+
 #[derive(Subcommand)]
 enum SyncCmd {
    /// Add a local folder to this machine's device and upload its contents.
@@ -543,6 +650,38 @@ enum SyncCmd {
        /// Optional synced-folder id; omit to reconcile every folder.
        id: Option<i64>,
    },
+    /// Pause syncing: queued uploads and mirror folders wait, reads keep working.
+    Pause {
+        /// End the pause by itself after this long, e.g. `30m`, `1h`, `2d`.
+        /// Omit to pause until `pdfs sync resume`.
+        #[arg(long = "for", value_parser = parse_pause_duration, conflicts_with = "folder")]
+        duration: Option<u64>,
+        /// Pause only this mirror folder (id from `sync list`) until resumed.
+        #[arg(long)]
+        folder: Option<i64>,
+    },
+    /// Resume syncing after `pdfs sync pause`.
+    Resume {
+        /// Resume only this folder, paused with `sync pause --folder`.
+        #[arg(long)]
+        folder: Option<i64>,
+    },
+    /// Cap upload and download speed, or show the caps with no options.
+    Limit {
+        /// Upload cap per second, e.g. `500K` or `2M`; `0` removes it.
+        #[arg(long, value_parser = parse_rate)]
+        up: Option<u64>,
+        /// Download cap per second, e.g. `500K` or `2M`; `0` removes it.
+        #[arg(long, value_parser = parse_rate)]
+        down: Option<u64>,
+    },
+    /// List uploads and changes not yet on Proton Drive.
+    Queue,
+    /// Retry a queued operation now (by id from `sync queue`), or every failed one.
+    Retry {
+        /// Queue id; omit to retry every failed operation.
+        id: Option<i64>,
+    },
    /// Switch a folder between full-copy sync and on-demand (FUSE, no local storage).
    Mode {
        /// Synced-folder id (from `sync list`).
@@ -557,6 +696,10 @@ enum SyncCmd {
        /// Accept every proposed local path without asking.
        #[arg(long)]
        yes: bool,
+        /// Restore another computer's folders instead, by device uid (from
+        /// `pdfs devices list`).
+        #[arg(long)]
+        device: Option<String>,
    },
 }

@@ -675,10 +818,33 @@ fn main() -> Result<()> {
        Command::ImportStatus => cmd_import_status(),
        Command::CancelImport => cmd_cancel_import(),
        Command::Album { uid, limit, offset } => cmd_album(uid, limit, offset),
+        Command::NewAlbum { name } => cmd_new_album(name),
+        Command::RenameAlbum { uid, name } => {
+            ok_or_bail(control_request(CtlRequest::RenameAlbum { uid, name })?)
+        }
+        Command::DeleteAlbum { uid, with_photos } => {
+            ok_or_bail(control_request(CtlRequest::DeleteAlbum {
+                uid,
+                delete_photos: with_photos,
+            })?)
+        }
+        Command::AddToAlbum { uid, photos } => {
+            cmd_album_change(CtlRequest::AddToAlbum { uid, photos }, "added")
+        }
+        Command::RemoveFromAlbum { uid, photos } => {
+            cmd_album_change(CtlRequest::RemoveFromAlbum { uid, photos }, "removed")
+        }
        Command::OpenPhoto { uid } => cmd_open_photo(uid),
-        Command::Search { query, limit } => cmd_search(query, limit),
+        Command::Search {
+            query,
+            limit,
+            scope,
+        } => cmd_search(query, limit, scope),
        Command::Rename { path, new_name } => cmd_rename(path, new_name),
-        Command::Move { path, new_parent } => cmd_move(path, new_parent),
+        Command::Move { mut paths } => {
+            let new_parent = paths.pop().expect("clap requires at least two paths");
+            cmd_move(paths, new_parent)
+        }
        Command::Rm { path } => cmd_rm(path),
        Command::Mkdir { parent, name } => cmd_mkdir(parent, name),
        Command::Upload { sources, parent } => cmd_upload(sources, parent),
@@ -691,6 +857,7 @@ fn main() -> Result<()> {
        Command::Refresh { target, full } => cmd_refresh(target, full),
        Command::Devices { action } => cmd_devices(action),
        Command::Sync { action } => cmd_sync(action),
+        Command::Conflicts { action } => cmd_conflicts(action),
        Command::Share {
            path,
            emails,
@@ -798,6 +965,10 @@ fn cmd_sync(action: SyncCmd) -> Result<()> {
                            Some(pending) => format!("{} → {pending}", f.mode),
                            None => f.mode.clone(),
                        };
+                        let mode = match f.paused {
+                            true => format!("{mode}, paused"),
+                            false => mode,
+                        };
                        println!(
                            "[{}]  {}  ({mode}, {}, synced: {sync})",
                            f.id, f.local_path, f.state
@@ -834,10 +1005,114 @@ fn cmd_sync(action: SyncCmd) -> Result<()> {
            })?)?
        }
        SyncCmd::Now { id } => ok_or_bail(control_request(CtlRequest::SyncNow { id })?)?,
+        SyncCmd::Pause {
+            folder: Some(id), ..
+        } => ok_or_bail(control_request(CtlRequest::SetSyncFolderPaused {
+            id,
+            paused: true,
+        })?)?,
+        SyncCmd::Resume { folder: Some(id) } => {
+            ok_or_bail(control_request(CtlRequest::SetSyncFolderPaused {
+                id,
+                paused: false,
+            })?)?
+        }
+        SyncCmd::Pause {
+            duration,
+            folder: None,
+        } => {
+            let until = duration.map(|secs| unix_now().saturating_add(secs as i64));
+            ok_or_bail(control_request(CtlRequest::SetSyncPaused {
+                paused: true,
+                until,
+            })?)?
+        }
+        SyncCmd::Queue => return cmd_sync_queue(),
+        SyncCmd::Limit { up, down } => return cmd_sync_limit(up, down),
+        SyncCmd::Retry { id } => ok_or_bail(control_request(CtlRequest::RetryPendingOp { id })?)?,
+        SyncCmd::Resume { folder: None } => {
+            ok_or_bail(control_request(CtlRequest::SetSyncPaused {
+                paused: false,
+                until: None,
+            })?)?
+        }
        SyncCmd::Mode { id, mode } => {
            ok_or_bail(control_request(CtlRequest::SetSyncFolderMode { id, mode })?)?
        }
-        SyncCmd::Restore { yes } => return cmd_sync_restore(yes),
+        SyncCmd::Restore { yes, device } => return cmd_sync_restore(yes, device),
+    }
+    Ok(())
+}
+
+/// `pdfs conflicts`: list conflict copies, or resolve one.
+fn cmd_conflicts(action: Option<ConflictCmd>) -> Result<()> {
+    if let Some(ConflictCmd::Resolve { path, keep, name }) = action {
+        let keep = match keep.as_str() {
+            "original" => ConflictKeep::Original,
+            "copy" => ConflictKeep::Copy,
+            _ => ConflictKeep::Both {
+                name: name.unwrap_or_default(),
+            },
+        };
+        let path = path_arg(&path)?;
+        return ok_or_bail(control_request(CtlRequest::ResolveConflict { path, keep })?);
+    }
+    let response = control_request(CtlRequest::ListConflicts)?;
+    if emit_json(&response)? {
+        return Ok(());
+    }
+    match response {
+        CtlResponse::Conflicts { items } if items.is_empty() => println!("No conflicts."),
+        CtlResponse::Conflicts { items } => {
+            for c in items {
+                println!("{}", c.path);
+                let verdict = match (c.original_exists, c.identical) {
+                    (false, _) => "original is gone".to_string(),
+                    (true, true) => format!("identical to {}", c.original_path),
+                    (true, false) => format!(
+                        "differs from {} ({} vs {})",
+                        c.original_path,
+                        human_bytes(c.size),
+                        human_bytes(c.original_size.unwrap_or_default()),
+                    ),
+                };
+                println!("      {verdict}");
+            }
+        }
+        CtlResponse::Error { message, kind } => bail!("{}", cli_error(kind, &message)),
+        other => bail!("unexpected response: {other:?}"),
+    }
+    Ok(())
+}
+
+/// `pdfs sync queue`: what has not reached Proton Drive yet, and why.
+fn cmd_sync_queue() -> Result<()> {
+    let response = control_request(CtlRequest::ListPendingOps)?;
+    if emit_json(&response)? {
+        return Ok(());
+    }
+    match response {
+        CtlResponse::PendingOps { items } if items.is_empty() => {
+            println!("Nothing queued: everything is on Proton Drive.");
+        }
+        CtlResponse::PendingOps { items } => {
+            let now = unix_now();
+            for op in items {
+                let state = match (op.parked, op.next_attempt_at) {
+                    (true, _) => "waiting for its final name".to_string(),
+                    (false, Some(at)) if at > now => {
+                        format!("next try in {}", human_age((at - now) as u64))
+                    }
+                    (false, _) => "due now".to_string(),
+                };
+                println!("[{}]  {}  {}  ({state})", op.id, op.kind, op.path);
+                if let Some(error) = &op.last_error {
+                    println!("      failed {} time(s): {error}", op.attempts);
+                }
+            }
+        }
+        CtlResponse::Error { message, kind } => bail!("{}", cli_error(kind, &message)),
+        other => bail!("unexpected response: {other:?}"),
    }
    Ok(())
 }
@@ -848,8 +1123,13 @@ fn cmd_sync(action: SyncCmd) -> Result<()> {
 /// The daemon only ever *proposes* local paths — a path recorded by another
 /// machine may name a home directory that does not exist here — so the default
 /// flow is propose-and-confirm. `--yes` accepts the proposals for scripting.
-fn cmd_sync_restore(yes: bool) -> Result<()> {
-    let response = control_request(CtlRequest::ListRestorableFolders)?;
+fn cmd_sync_restore(yes: bool, device: Option<String>) -> Result<()> {
+    let response = control_request(match &device {
+        Some(device) => CtlRequest::ListDeviceRestorableFolders {
+            device: device.clone(),
+        },
+        None => CtlRequest::ListRestorableFolders,
+    })?;
    if emit_json(&response)? {
        return Ok(());
    }
@@ -899,8 +1179,12 @@ fn cmd_sync_restore(yes: bool) -> Result<()> {
        println!("Nothing selected.");
        return Ok(());
    }
-    ok_or_bail(control_request(CtlRequest::RestoreSyncFolders {
-        items: chosen,
+    ok_or_bail(control_request(match device {
+        Some(device) => CtlRequest::RestoreDeviceFolders {
+            device,
+            items: chosen,
+        },
+        None => CtlRequest::RestoreSyncFolders { items: chosen },
    })?)
 }

@@ -1038,12 +1322,17 @@ fn cmd_share_role(path: PathBuf, id: String, kind: ShareKindArg, role: String) -
    })?)
 }

-fn cmd_unshare(path: PathBuf, id: String, kind: ShareKindArg) -> Result<()> {
-    ok_or_bail(control_request(CtlRequest::RemoveShareEntry {
-        path: path_arg(&path)?,
-        id,
-        kind: kind.to_kind(),
-    })?)
+fn cmd_unshare(path: PathBuf, id: Option<String>, kind: Option<ShareKindArg>) -> Result<()> {
+    let path = path_arg(&path)?;
+    let request = match (id, kind) {
+        (Some(id), Some(kind)) => CtlRequest::RemoveShareEntry {
+            path,
+            id,
+            kind: kind.to_kind(),
+        },
+        _ => CtlRequest::StopSharing { path },
+    };
+    ok_or_bail(control_request(request)?)
 }

 fn cmd_public_link(action: PublicLinkCmd) -> Result<()> {
@@ -1472,9 +1761,15 @@ fn cmd_status() -> Result<()> {
            failing_error,
            staged_bytes,
            staged_oldest_secs,
+            paused,
+            paused_until,
            ..
        }) => {
-            let state = if online { "" } else { ", offline" };
+            let state = match (online, paused) {
+                (_, true) => ", sync paused",
+                (false, false) => ", offline",
+                (true, false) => "",
+            };
            let queued = match pending_summary(pending_uploads, pending_changes) {
                Some(s) => format!(", {s}"),
                None => String::new(),
@@ -1490,6 +1785,10 @@ fn cmd_status() -> Result<()> {
                    human_age(staged_oldest_secs),
                );
            }
+            if let Some(until) = paused_until {
+                let left = until.saturating_sub(unix_now()).max(0) as u64;
+                println!("Paused     sync resumes in {}", human_age(left.max(1)));
+            }
            if parked_uploads > 0 {
                println!("Parked     {parked_uploads} upload(s) waiting for a final filename");
            }
@@ -1682,6 +1981,8 @@ fn mount_once(mountpoint: Option<PathBuf>) -> Result<pdfs_fuse::MountOutcome> {
        pdfs_fuse::MountOptions {
            username,
            sweep_mode: config.resolved_conflict_sweep(),
+            upload_limit: config.upload_limit.unwrap_or(0),
+            download_limit: config.download_limit.unwrap_or(0),
        },
    );

@@ -1817,6 +2118,7 @@ fn cmd_photos(limit: usize, offset: usize, favorites: bool) -> Result<()> {
        kind: None,
        range: None,
        favorites,
+        not_in_album: false,
    })? {
        CtlResponse::Photos {
            available: false, ..
@@ -1886,6 +2188,42 @@ fn cmd_albums() -> Result<()> {
    Ok(())
 }

+fn cmd_new_album(name: String) -> Result<()> {
+    match control_request(CtlRequest::CreateAlbum { name })? {
+        CtlResponse::AlbumCreated { uid } => println!("{uid}"),
+        CtlResponse::Error { message, kind } => bail!("{}", cli_error(kind, &message)),
+        other => bail!("unexpected response: {other:?}"),
+    }
+    Ok(())
+}
+
+/// Send an album add or remove and report it per photo; any failed photo
+/// fails the command.
+fn cmd_album_change(request: CtlRequest, verb: &str) -> Result<()> {
+    match control_request(request)? {
+        CtlResponse::AlbumChanged { changed, failed } => {
+            println!("{} {verb}", photo_count(changed.len()));
+            for failure in &failed {
+                eprintln!("{}: {}", failure.uid, failure.message);
+            }
+            if !failed.is_empty() {
+                bail!("{} failed", photo_count(failed.len()));
+            }
+        }
+        CtlResponse::Error { message, kind } => bail!("{}", cli_error(kind, &message)),
+        other => bail!("unexpected response: {other:?}"),
+    }
+    Ok(())
+}
+
+fn photo_count(n: usize) -> String {
+    if n == 1 {
+        "1 photo".to_string()
+    } else {
+        format!("{n} photos")
+    }
+}
+
 fn cmd_import_google_photos(archives: Vec<PathBuf>, dry_run: bool, wait: bool) -> Result<()> {
    // The daemon opens the archives itself off the shared filesystem, so it gets
    // absolute paths — the same arrangement `pdfs upload` uses.
@@ -2112,8 +2450,13 @@ fn cmd_open_photo(uid: String) -> Result<()> {
    Ok(())
 }

-fn cmd_search(query: String, limit: usize) -> Result<()> {
-    match control_request(CtlRequest::Search { query, limit })? {
+fn cmd_search(query: String, limit: usize, scope: Option<PathBuf>) -> Result<()> {
+    let scope = scope.map(|p| path_arg(&p)).transpose()?;
+    match control_request(CtlRequest::Search {
+        query,
+        limit,
+        scope,
+    })? {
        CtlResponse::SearchResults { hits } if hits.is_empty() => println!("(no matches)"),
        CtlResponse::SearchResults { hits } => {
            for h in hits {
@@ -2140,14 +2483,33 @@ fn cmd_rename(path: PathBuf, new_name: String) -> Result<()> {
    Ok(())
 }

-fn cmd_move(path: PathBuf, new_parent: PathBuf) -> Result<()> {
-    match control_request(CtlRequest::Move {
-        path: path_arg(&path)?,
-        new_parent: path_arg(&new_parent)?,
-    })? {
-        CtlResponse::Ok { message } => println!("{message}"),
-        CtlResponse::Error { message, kind } => bail!("{}", cli_error(kind, &message)),
-        other => bail!("unexpected response: {other:?}"),
+/// Move each of `sources` into `new_parent`, one request each. A refusal names
+/// its source and the rest still move; the command fails if any did not.
+fn cmd_move(sources: Vec<PathBuf>, new_parent: PathBuf) -> Result<()> {
+    let new_parent = path_arg(&new_parent)?;
+    let mut failed = 0;
+    for source in &sources {
+        let outcome = path_arg(source).and_then(|path| {
+            match control_request(CtlRequest::Move {
+                path,
+                new_parent: new_parent.clone(),
+            })? {
+                CtlResponse::Ok { message } => Ok(message),
+                CtlResponse::Error { message, kind } => bail!("{}", cli_error(kind, &message)),
+                other => bail!("unexpected response: {other:?}"),
+            }
+        });
+        match outcome {
+            Ok(message) => println!("{message}"),
+            Err(e) if sources.len() == 1 => return Err(e),
+            Err(e) => {
+                eprintln!("{}: {e:#}", source.display());
+                failed += 1;
+            }
+        }
+    }
+    if failed > 0 {
+        bail!("{failed} of {} could not be moved", sources.len());
    }
    Ok(())
 }
@@ -2225,7 +2587,11 @@ fn cmd_diagnostics() -> Result<()> {
 }

 fn cmd_trash() -> Result<()> {
-    match control_request(CtlRequest::ListTrash)? {
+    let response = control_request(CtlRequest::ListTrash)?;
+    if emit_json(&response)? {
+        return Ok(());
+    }
+    match response {
        CtlResponse::Entries { entries } if entries.is_empty() => println!("(trash is empty)"),
        CtlResponse::Entries { entries } => {
            for e in entries {
@@ -2384,6 +2750,72 @@ fn path_arg(path: &Path) -> Result<String> {

 /// Format an age in seconds for a report line, coarsely — the point of the
 /// number is whether it is minutes or weeks.
+/// Parse a `sync pause --for` duration: a whole number followed by `m`, `h` or
+/// `d`. Returns seconds.
+fn parse_pause_duration(text: &str) -> Result<u64, String> {
+    let text = text.trim();
+    let split = text.char_indices().last().map_or(0, |(at, _)| at);
+    let (number, unit) = text.split_at(split);
+    let per_unit: u64 = match unit {
+        "m" => 60,
+        "h" => 3600,
+        "d" => 86_400,
+        _ => return Err("use a number followed by m, h or d, e.g. 30m".to_string()),
+    };
+    match number.parse::<u64>() {
+        Ok(n) if n > 0 => Ok(n.saturating_mul(per_unit)),
+        _ => Err("use a positive whole number, e.g. 30m".to_string()),
+    }
+}
+
+/// Read a bytes-per-second rate: a whole number with an optional `K`, `M` or
+/// `G` suffix in the same binary units `human_bytes` prints.
+fn parse_rate(text: &str) -> Result<u64, String> {
+    let text = text.trim();
+    let (number, scale) = match text.char_indices().last() {
+        Some((at, 'K' | 'k')) => (&text[..at], 1024),
+        Some((at, 'M' | 'm')) => (&text[..at], 1_048_576),
+        Some((at, 'G' | 'g')) => (&text[..at], 1_073_741_824),
+        _ => (text, 1),
+    };
+    number
+        .parse::<u64>()
+        .map(|n| n.saturating_mul(scale))
+        .map_err(|_| "use a whole number with an optional K, M or G, e.g. 2M".to_string())
+}
+
+fn human_rate(rate: u64) -> String {
+    if rate == 0 {
+        "unlimited".to_string()
+    } else {
+        format!("{}/s", human_bytes(rate))
+    }
+}
+
+/// `pdfs sync limit`: set the bandwidth caps, keeping whichever one is not
+/// given, or print both when neither is.
+fn cmd_sync_limit(up: Option<u64>, down: Option<u64>) -> Result<()> {
+    let config = AppDirs::new()?.load_config();
+    let upload = up.or(config.upload_limit).unwrap_or(0);
+    let download = down.or(config.download_limit).unwrap_or(0);
+    if up.is_none() && down.is_none() {
+        println!("Upload     {}", human_rate(upload));
+        println!("Download   {}", human_rate(download));
+        return Ok(());
+    }
+    ok_or_bail(control_request(CtlRequest::SetBandwidthLimits {
+        upload,
+        download,
+    })?)
+}
+
+fn unix_now() -> i64 {
+    std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .map(|d| d.as_secs() as i64)
+        .unwrap_or(0)
+}
+
 fn human_age(secs: u64) -> String {
    const UNITS: [(&str, u64); 4] = [("d", 86_400), ("h", 3_600), ("m", 60), ("s", 1)];
    for (unit, scale) in UNITS {
@@ -2847,6 +3279,40 @@ fn control_request(req: CtlRequest) -> Result<CtlResponse> {
        .with_context(|| format!("talk to mount daemon at {}", socket.display()))
 }

+#[cfg(test)]
+mod pause_tests {
+    use super::*;
+
+    #[test]
+    fn pause_durations_read_minutes_hours_and_days() {
+        assert_eq!(parse_pause_duration("30m"), Ok(1800));
+        assert_eq!(parse_pause_duration("1h"), Ok(3600));
+        assert_eq!(parse_pause_duration("2d"), Ok(172_800));
+    }
+
+    #[test]
+    fn pause_durations_reject_what_they_cannot_read() {
+        assert!(parse_pause_duration("").is_err());
+        assert!(parse_pause_duration("0h").is_err());
+        assert!(parse_pause_duration("1w").is_err());
+        assert!(parse_pause_duration("h").is_err());
+        assert!(parse_pause_duration("-1h").is_err());
+        assert!(parse_pause_duration("1ä").is_err());
+    }
+
+    #[test]
+    fn rates_read_plain_bytes_and_binary_suffixes() {
+        assert_eq!(parse_rate("0"), Ok(0));
+        assert_eq!(parse_rate("1500"), Ok(1500));
+        assert_eq!(parse_rate("500K"), Ok(512_000));
+        assert_eq!(parse_rate("2m"), Ok(2_097_152));
+        assert!(parse_rate("").is_err());
+        assert!(parse_rate("M").is_err());
+        assert!(parse_rate("1.5M").is_err());
+        assert!(parse_rate("2MB").is_err());
+    }
+}
+
 #[cfg(test)]
 mod diagnose_tests {
    use super::*;
@@ -2965,6 +3431,8 @@ mod login_wait_tests {
            shared_by: String::new(),
            shared_at: 0,
            shared_by_unverified: false,
+            trashed_at: 0,
+            trashed_from: None,
        };
        assert_eq!(shared_by_line(&entry), None, "no invitation, no line");
        entry.shared_by = "alice@proton.me".into();
@@ -2977,3 +3445,36 @@ mod login_wait_tests {
        assert!(shared_by_line(&entry).unwrap().contains("WARNING"));
    }
 }
+
+#[cfg(test)]
+mod unshare_tests {
+    use super::*;
+    use clap::Parser;
+
+    #[test]
+    fn unshare_with_only_a_path_stops_sharing() {
+        let cli = Cli::try_parse_from(["pdfs", "unshare", "docs/report.pdf"]).unwrap();
+        assert!(matches!(
+            cli.command,
+            Command::Unshare {
+                id: None,
+                kind: None,
+                ..
+            }
+        ));
+    }
+
+    #[test]
+    fn unshare_with_an_id_needs_its_kind() {
+        assert!(Cli::try_parse_from(["pdfs", "unshare", "docs", "abc"]).is_err());
+        let cli = Cli::try_parse_from(["pdfs", "unshare", "docs", "abc", "member"]).unwrap();
+        assert!(matches!(
+            cli.command,
+            Command::Unshare {
+                id: Some(_),
+                kind: Some(_),
+                ..
+            }
+        ));
+    }
+}
@@ -0,0 +1,250 @@
+AD	Andorra
+AE	United Arab Emirates
+AF	Afghanistan
+AG	Antigua and Barbuda
+AI	Anguilla
+AL	Albania
+AM	Armenia
+AO	Angola
+AQ	Antarctica
+AR	Argentina
+AS	American Samoa
+AT	Austria
+AU	Australia
+AW	Aruba
+AX	Åland Islands
+AZ	Azerbaijan
+BA	Bosnia and Herzegovina
+BB	Barbados
+BD	Bangladesh
+BE	Belgium
+BF	Burkina Faso
+BG	Bulgaria
+BH	Bahrain
+BI	Burundi
+BJ	Benin
+BL	Saint Barthélemy
+BM	Bermuda
+BN	Brunei Darussalam
+BO	Bolivia, Plurinational State of
+BQ	Bonaire, Sint Eustatius and Saba
+BR	Brazil
+BS	Bahamas
+BT	Bhutan
+BV	Bouvet Island
+BW	Botswana
+BY	Belarus
+BZ	Belize
+CA	Canada
+CC	Cocos (Keeling) Islands
+CD	Congo, The Democratic Republic of the
+CF	Central African Republic
+CG	Congo
+CH	Switzerland
+CI	Côte d'Ivoire
+CK	Cook Islands
+CL	Chile
+CM	Cameroon
+CN	China
+CO	Colombia
+CR	Costa Rica
+CU	Cuba
+CV	Cabo Verde
+CW	Curaçao
+CX	Christmas Island
+CY	Cyprus
+CZ	Czechia
+DE	Germany
+DJ	Djibouti
+DK	Denmark
+DM	Dominica
+DO	Dominican Republic
+DZ	Algeria
+EC	Ecuador
+EE	Estonia
+EG	Egypt
+EH	Western Sahara
+ER	Eritrea
+ES	Spain
+ET	Ethiopia
+FI	Finland
+FJ	Fiji
+FK	Falkland Islands (Malvinas)
+FM	Micronesia, Federated States of
+FO	Faroe Islands
+FR	France
+GA	Gabon
+GB	United Kingdom
+GD	Grenada
+GE	Georgia
+GF	French Guiana
+GG	Guernsey
+GH	Ghana
+GI	Gibraltar
+GL	Greenland
+GM	Gambia
+GN	Guinea
+GP	Guadeloupe
+GQ	Equatorial Guinea
+GR	Greece
+GS	South Georgia and the South Sandwich Islands
+GT	Guatemala
+GU	Guam
+GW	Guinea-Bissau
+GY	Guyana
+HK	Hong Kong
+HM	Heard Island and McDonald Islands
+HN	Honduras
+HR	Croatia
+HT	Haiti
+HU	Hungary
+ID	Indonesia
+IE	Ireland
+IL	Israel
+IM	Isle of Man
+IN	India
+IO	British Indian Ocean Territory
+IQ	Iraq
+IR	Iran, Islamic Republic of
+IS	Iceland
+IT	Italy
+JE	Jersey
+JM	Jamaica
+JO	Jordan
+JP	Japan
+KE	Kenya
+KG	Kyrgyzstan
+KH	Cambodia
+KI	Kiribati
+KM	Comoros
+KN	Saint Kitts and Nevis
+KP	Korea, Democratic People's Republic of
+KR	Korea, Republic of
+KW	Kuwait
+KY	Cayman Islands
+KZ	Kazakhstan
+LA	Lao People's Democratic Republic
+LB	Lebanon
+LC	Saint Lucia
+LI	Liechtenstein
+LK	Sri Lanka
+LR	Liberia
+LS	Lesotho
+LT	Lithuania
+LU	Luxembourg
+LV	Latvia
+LY	Libya
+MA	Morocco
+MC	Monaco
+MD	Moldova, Republic of
+ME	Montenegro
+MF	Saint Martin (French part)
+MG	Madagascar
+MH	Marshall Islands
+MK	North Macedonia
+ML	Mali
+MM	Myanmar
+MN	Mongolia
+MO	Macao
+MP	Northern Mariana Islands
+MQ	Martinique
+MR	Mauritania
+MS	Montserrat
+MT	Malta
+MU	Mauritius
+MV	Maldives
+MW	Malawi
+MX	Mexico
+MY	Malaysia
+MZ	Mozambique
+NA	Namibia
+NC	New Caledonia
+NE	Niger
+NF	Norfolk Island
+NG	Nigeria
+NI	Nicaragua
+NL	Netherlands
+NO	Norway
+NP	Nepal
+NR	Nauru
+NU	Niue
+NZ	New Zealand
+OM	Oman
+PA	Panama
+PE	Peru
+PF	French Polynesia
+PG	Papua New Guinea
+PH	Philippines
+PK	Pakistan
+PL	Poland
+PM	Saint Pierre and Miquelon
+PN	Pitcairn
+PR	Puerto Rico
+PS	Palestine, State of
+PT	Portugal
+PW	Palau
+PY	Paraguay
+QA	Qatar
+RE	Réunion
+RO	Romania
+RS	Serbia
+RU	Russian Federation
+RW	Rwanda
+SA	Saudi Arabia
+SB	Solomon Islands
+SC	Seychelles
+SD	Sudan
+SE	Sweden
+SG	Singapore
+SH	Saint Helena, Ascension and Tristan da Cunha
+SI	Slovenia
+SJ	Svalbard and Jan Mayen
+SK	Slovakia
+SL	Sierra Leone
+SM	San Marino
+SN	Senegal
+SO	Somalia
+SR	Suriname
+SS	South Sudan
+ST	Sao Tome and Principe
+SV	El Salvador
+SX	Sint Maarten (Dutch part)
+SY	Syrian Arab Republic
+SZ	Eswatini
+TC	Turks and Caicos Islands
+TD	Chad
+TF	French Southern Territories
+TG	Togo
+TH	Thailand
+TJ	Tajikistan
+TK	Tokelau
+TL	Timor-Leste
+TM	Turkmenistan
+TN	Tunisia
+TO	Tonga
+TR	Türkiye
+TT	Trinidad and Tobago
+TV	Tuvalu
+TW	Taiwan, Province of China
+TZ	Tanzania, United Republic of
+UA	Ukraine
+UG	Uganda
+UM	United States Minor Outlying Islands
+US	United States
+UY	Uruguay
+UZ	Uzbekistan
+VA	Holy See (Vatican City State)
+VC	Saint Vincent and the Grenadines
+VE	Venezuela, Bolivarian Republic of
+VG	Virgin Islands, British
+VI	Virgin Islands, U.S.
+VN	Viet Nam
+VU	Vanuatu
+WF	Wallis and Futuna
+WS	Samoa
+XK	Kosovo
+YE	Yemen
+YT	Mayotte
+ZA	South Africa
+ZM	Zambia
+ZW	Zimbabwe
@@ -298,6 +298,10 @@ pub struct Pin {
    /// which is why it is defaulted.
    #[serde(default)]
    pub is_dir: Option<bool>,
+    /// A pinned file whose content is on disk right now. The daemon fills it
+    /// in when it answers `ListPins`; folders and older daemons say `false`.
+    #[serde(default)]
+    pub cached: bool,
 }

 /// The legacy JSON pin registry, kept only to import a pre-P5 `pins.json` into
@@ -361,6 +365,14 @@ pub struct StagedWrite {
    pub based_on: Option<Baseline>,
 }

+impl StagedWrite {
+    /// Whether `authored` ranges cover a file of `len` bytes, so the staged
+    /// bytes are its complete new content. An empty file has nothing to cover.
+    pub fn covers(authored: &[(u64, u64)], len: u64) -> bool {
+        len == 0 || authored == [(0, len)]
+    }
+}
+
 /// The identity of a remote revision, as far as we can observe it.
 ///
 /// `revision_id` is the authoritative identity when present: the server assigns a
@@ -726,6 +738,60 @@ impl ContentCache {
        Some(buf)
    }

+    /// Write the whole content of `uid` at `(mtime, size)` to `dst` from the
+    /// cache alone, and report whether that worked.
+    ///
+    /// A whole-file blob is cloned. Otherwise every block of the revision has to
+    /// be cached, under its recorded geometry or, failing that, the uniform one
+    /// the read path would use. Anything short of the full content leaves
+    /// nothing at `dst`, so a caller falls back to a download with a clean slate.
+    ///
+    /// This is what lets a mirror folder take a file an on-demand mount has
+    /// already read, after a move between them, without fetching it again. The
+    /// trust is the read path's: the same `(mtime, size)` key, and blocks that
+    /// were validated when they were fetched.
+    pub fn copy_cached_to(&self, uid: &NodeUid, mtime: i64, size: u64, dst: &Path) -> bool {
+        if size == 0 {
+            return false;
+        }
+        if let Some(blob) = self.valid_blob(uid, mtime, size) {
+            if Self::clone_or_copy(&blob, dst).is_ok_and(|len| len == size) {
+                self.touch(Self::key(uid));
+                return true;
+            }
+            let _ = std::fs::remove_file(dst);
+            return false;
+        }
+        let geometry = self
+            .block_geometry(uid, mtime, size)
+            .unwrap_or_else(|| BlockGeometry::uniform(size));
+        if geometry.size() != size {
+            return false;
+        }
+        let spans = geometry.spans(0, size);
+        // Checked up front so a file with one block missing costs stats, not a
+        // copy of every block before it.
+        if !spans
+            .iter()
+            .all(|&span| self.has_block(uid, mtime, size, span))
+        {
+            return false;
+        }
+        let written = (|| -> Option<()> {
+            use std::io::Write;
+            let mut out = std::fs::File::create(dst).ok()?;
+            for span in spans {
+                out.write_all(&self.cached_block(uid, mtime, size, span)?)
+                    .ok()?;
+            }
+            (out.metadata().ok()?.len() == size).then_some(())
+        })();
+        if written.is_none() {
+            let _ = std::fs::remove_file(dst);
+        }
+        written.is_some()
+    }
+
    /// Store `bytes` as the cached content for `uid`, tagged with `(mtime,
    /// size)`. The blob is written to a temp file then renamed so a concurrent
    /// reader never sees a partial blob; the meta tag is written last so a
@@ -1854,6 +1920,7 @@ impl ContentCache {
                path: row.path,
                recursive: row.recursive,
                is_dir: row.is_dir,
+                cached: false,
            })
            .collect()
    }
@@ -1997,6 +2064,17 @@ mod tests {
        NodeUid::new(VolumeId::from("vol"), LinkId::from(link))
    }

+    #[test]
+    fn an_empty_write_covers_the_file_and_a_gap_does_not() {
+        assert!(
+            StagedWrite::covers(&[], 0),
+            "an empty file has nothing to cover"
+        );
+        assert!(StagedWrite::covers(&[(0, 7)], 7));
+        assert!(!StagedWrite::covers(&[(0, 3), (4, 7)], 7));
+        assert!(!StagedWrite::covers(&[], 7));
+    }
+
    /// A unique temp directory removed on drop; avoids a dev-dependency.
    struct TempDir(PathBuf);
    impl TempDir {
@@ -2556,6 +2634,46 @@ mod tests {
        assert!(c.cached_block(&u, 100, 5000, blk(5000, 0)).is_none());
    }

+    #[test]
+    fn a_cached_blob_is_copied_out_whole() {
+        let (c, d) = cache();
+        let u = uid("blob");
+        c.store(&u, 7, 5, b"hello").unwrap();
+        let dst = d.path().join("out");
+        assert!(c.copy_cached_to(&u, 7, 5, &dst));
+        assert_eq!(std::fs::read(&dst).unwrap(), b"hello");
+        // Another revision is not this one.
+        assert!(!c.copy_cached_to(&u, 8, 5, &d.path().join("stale")));
+        assert!(!d.path().join("stale").exists());
+    }
+
+    #[test]
+    fn cached_blocks_are_copied_out_in_order() {
+        let (c, d) = cache();
+        let u = uid("blocks");
+        let size = BLOCK_SIZE + 3;
+        let first = vec![1_u8; BLOCK_SIZE as usize];
+        c.store_block(&u, 7, size, blk(size, 0), &first).unwrap();
+        c.store_block(&u, 7, size, blk(size, 1), b"end").unwrap();
+        let dst = d.path().join("out");
+        assert!(c.copy_cached_to(&u, 7, size, &dst));
+        let bytes = std::fs::read(&dst).unwrap();
+        assert_eq!(bytes.len() as u64, size);
+        assert_eq!(&bytes[..BLOCK_SIZE as usize], first.as_slice());
+        assert_eq!(&bytes[BLOCK_SIZE as usize..], b"end");
+    }
+
+    #[test]
+    fn a_file_with_a_block_missing_is_not_copied_out() {
+        let (c, d) = cache();
+        let u = uid("partial");
+        let size = BLOCK_SIZE + 3;
+        c.store_block(&u, 7, size, blk(size, 1), b"end").unwrap();
+        let dst = d.path().join("out");
+        assert!(!c.copy_cached_to(&u, 7, size, &dst));
+        assert!(!dst.exists(), "a partial copy must not be left behind");
+    }
+
    /// The [`BlockSpan`] the uniform geometry gives block `idx` of a file of
    /// `size` bytes — the shape these tests were written against, and the one
    /// this client's own uploads still have.
@@ -85,6 +85,15 @@ pub struct AppConfig {
    /// writes an explicit value here. Defaulted for configs predating the field.
    #[serde(default)]
    pub cache_budget: Option<u64>,
+    /// Upload cap in bytes per second shared by every upload. `None` or `0`
+    /// means no cap. Defaulted for configs predating the field.
+    #[serde(default)]
+    pub upload_limit: Option<u64>,
+    /// Download cap in bytes per second shared by every download, FUSE reads
+    /// included. `None` or `0` means no cap. Defaulted for configs predating
+    /// the field.
+    #[serde(default)]
+    pub download_limit: Option<u64>,
    /// Mountpoint the daemon mounts at. `None` means
    /// [`AppDirs::default_mountpoint`]; the Settings page writes an explicit
    /// path here. Defaulted for configs predating the field.
@@ -119,6 +128,85 @@ pub struct AppConfig {
    /// field.
    #[serde(default)]
    pub prompt: Option<PromptConfig>,
+    /// Paint the desktop app in Proton's colours instead of the system theme
+    /// and accent colour. `None` means "follow the system". Defaulted for
+    /// configs predating the field; also read from `proton_accent`, its name
+    /// while it only changed the accent.
+    #[serde(default, alias = "proton_accent")]
+    pub proton_theme: Option<bool>,
+    /// How the desktop app's My Files page lays out and orders a folder.
+    /// Defaulted for configs predating the field.
+    #[serde(default)]
+    pub files_view: FilesView,
+    /// The user hid the tray icon from its own menu. The tray exits at start
+    /// while this is set, and the app does not spawn it; Preferences turns it
+    /// back on. Defaulted for configs predating the field.
+    #[serde(default)]
+    pub tray_hidden: bool,
+    /// Language for the desktop app, tray and search prompt, as a gettext code
+    /// such as `de` or `pt_BR`. `None` means "follow the system locale".
+    /// Defaulted for configs predating the field.
+    #[serde(default)]
+    pub language: Option<String>,
+    /// Draw the Places map from OpenFreeMap's street map instead of the
+    /// built-in outline. Off by default: the tiles come from a third party,
+    /// which then learns which parts of the world are looked at. Defaulted for
+    /// configs predating the field.
+    #[serde(default)]
+    pub online_map: bool,
+}
+
+/// The My Files page's view choices, remembered between runs.
+#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
+#[serde(default)]
+pub struct FilesView {
+    /// Columns instead of the icon grid.
+    pub list: bool,
+    pub sort: FileSort,
+    pub descending: bool,
+    /// Folders ahead of files, whatever the sort.
+    pub folders_first: bool,
+}
+
+impl Default for FilesView {
+    fn default() -> Self {
+        Self {
+            list: false,
+            sort: FileSort::Name,
+            descending: false,
+            folders_first: true,
+        }
+    }
+}
+
+/// The key a My Files listing is ordered by.
+#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq, Eq, Default)]
+#[serde(rename_all = "lowercase")]
+pub enum FileSort {
+    #[default]
+    Name,
+    Size,
+    Modified,
+}
+
+impl FileSort {
+    /// The name used in the desktop app's actions and the config file.
+    pub fn as_str(self) -> &'static str {
+        match self {
+            FileSort::Name => "name",
+            FileSort::Size => "size",
+            FileSort::Modified => "modified",
+        }
+    }
+
+    pub fn parse(value: &str) -> Option<Self> {
+        match value {
+            "name" => Some(FileSort::Name),
+            "size" => Some(FileSort::Size),
+            "modified" => Some(FileSort::Modified),
+            _ => None,
+        }
+    }
 }

 impl Default for AppConfig {
@@ -127,12 +215,19 @@ impl Default for AppConfig {
            app_version: APP_VERSION.to_string(),
            user_agent: USER_AGENT.to_string(),
            cache_budget: None,
+            upload_limit: None,
+            download_limit: None,
            mountpoint: None,
            ignore_patterns: None,
            device_uid: None,
            conflict_sweep: None,
            open_with: None,
            prompt: None,
+            proton_theme: None,
+            files_view: FilesView::default(),
+            tray_hidden: false,
+            language: None,
+            online_map: false,
        }
    }
 }
@@ -471,17 +566,54 @@ mod tests {
            app_version: "external-drive-test-client@1.0.0".to_string(),
            user_agent: "test-agent/1.0".to_string(),
            cache_budget: Some(1234),
+            upload_limit: Some(500_000),
+            download_limit: None,
            mountpoint: Some("/tmp/x".to_string()),
            ignore_patterns: Some(vec!["build/".to_string()]),
            device_uid: Some("dev-uid".to_string()),
            conflict_sweep: Some(SweepMode::Enforce),
            open_with: None,
            prompt: None,
+            proton_theme: Some(true),
+            files_view: FilesView {
+                list: true,
+                sort: FileSort::Modified,
+                descending: true,
+                folders_first: false,
+            },
+            tray_hidden: true,
+            language: Some("de".to_string()),
+            online_map: true,
        };
        let json = serde_json::to_string(&config).unwrap();
        let decoded: AppConfig = serde_json::from_str(&json).unwrap();
        assert_eq!(decoded.app_version, "external-drive-test-client@1.0.0");
        assert_eq!(decoded.user_agent, "test-agent/1.0");
+        assert_eq!(decoded.proton_theme, Some(true));
+        assert!(decoded.tray_hidden);
+        assert!(decoded.online_map);
+        assert_eq!(decoded.language.as_deref(), Some("de"));
+        assert_eq!(decoded.upload_limit, Some(500_000));
+        assert_eq!(decoded.download_limit, None);
+        assert_eq!(decoded.files_view, config.files_view);
+    }
+
+    #[test]
+    fn a_config_without_a_files_view_gets_the_default() {
+        let decoded: AppConfig =
+            serde_json::from_str(r#"{"app_version":"a","user_agent":"b"}"#).unwrap();
+        assert_eq!(decoded.files_view, FilesView::default());
+        let partial: FilesView = serde_json::from_str(r#"{"sort":"size"}"#).unwrap();
+        assert_eq!(partial.sort, FileSort::Size);
+        assert!(partial.folders_first);
+    }
+
+    #[test]
+    fn the_old_proton_accent_setting_turns_on_the_proton_theme() {
+        let decoded: AppConfig =
+            serde_json::from_str(r#"{"app_version":"a","user_agent":"b","proton_accent":true}"#)
+                .unwrap();
+        assert_eq!(decoded.proton_theme, Some(true));
    }

    #[test]
@@ -554,6 +686,11 @@ mod tests {
        let json = r#"{"app_version":"v","user_agent":"u"}"#;
        let decoded: AppConfig = serde_json::from_str(json).unwrap();
        assert!(decoded.ignore_patterns.is_none());
+        assert!(!decoded.tray_hidden, "an old config keeps the tray icon");
+        assert!(
+            decoded.language.is_none(),
+            "an old config follows the system"
+        );
        assert_eq!(
            decoded.resolved_ignore_patterns().len(),
            DEFAULT_IGNORE_PATTERNS.len(),
@@ -29,6 +29,17 @@ impl Db {
        Ok(())
    }

+    /// Whether the kept log already holds an entry of `kind` for `target`. Lets
+    /// the daemon report something once across restarts rather than once per
+    /// run, without keeping a second table in step with the log.
+    pub fn activity_has(&self, kind: ActivityKind, target: &str) -> Result<bool> {
+        let kind = serde_json::to_string(&kind)?;
+        let conn = self.read();
+        let mut stmt =
+            conn.prepare("SELECT 1 FROM activity WHERE kind = ?1 AND target = ?2 LIMIT 1")?;
+        Ok(stmt.exists(params![kind, target])?)
+    }
+
    /// The most recent activity, newest first, capped at `limit` entries. Rows
    /// whose stored `kind` no longer parses (written by an older build) are
    /// skipped rather than failing the whole read.
@@ -178,7 +178,7 @@ impl Db {
                    ratio: r.get(3)?,
                    thumb_state: r.get(4)?,
                    kind: crate::control::PhotoKind::from_i64(r.get(5)?),
-                    // Album rows have no favourite state of their own: an album
+                    // Album rows have no favorite state of their own: an album
                    // photo on someone else's volume is not in our timeline, and
                    // favouriting one is not supported yet anyway.
                    favorite: false,
@@ -239,7 +239,7 @@ impl Db {
                    ratio: r.get(3)?,
                    thumb_state: r.get(4)?,
                    kind: crate::control::PhotoKind::from_i64(r.get(5)?),
-                    // Album rows have no favourite state of their own: an album
+                    // Album rows have no favorite state of their own: an album
                    // photo on someone else's volume is not in our timeline, and
                    // favouriting one is not supported yet anyway.
                    favorite: false,
@@ -0,0 +1,249 @@
+/* WARNING: Script requires that SQLITE_DBCONFIG_DEFENSIVE be disabled */
+PRAGMA foreign_keys=OFF;
+BEGIN TRANSACTION;
+CREATE TABLE sync_state (key TEXT PRIMARY KEY, value TEXT);
+INSERT INTO sync_state VALUES('schema_version','35');
+CREATE TABLE nodes (
+  uid           TEXT PRIMARY KEY,
+  parent_uid    TEXT,
+  name          TEXT NOT NULL,
+  is_dir        INTEGER NOT NULL,
+  size          INTEGER,
+  mtime         INTEGER NOT NULL,
+  revision_hash TEXT,
+  trashed       INTEGER NOT NULL DEFAULT 0
+, node_json TEXT, listed INTEGER NOT NULL DEFAULT 0, path TEXT);
+INSERT INTO nodes VALUES('vol~root',NULL,'My Files',1,0,200,NULL,0,'{"uid":{"volume_id":"vol","link_id":"root"},"parent_uid":null,"kind":"Folder","name":"My Files","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',0,'');
+INSERT INTO nodes VALUES('vol~docs','vol~root','Docs',1,0,200,NULL,0,'{"uid":{"volume_id":"vol","link_id":"docs"},"parent_uid":{"volume_id":"vol","link_id":"root"},"kind":"Folder","name":"Docs","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',0,'Docs');
+INSERT INTO nodes VALUES('vol~report','vol~docs','report.txt',0,10,200,NULL,0,'{"uid":{"volume_id":"vol","link_id":"report"},"parent_uid":{"volume_id":"vol","link_id":"docs"},"kind":{"File":{"media_type":"text/plain","total_size_on_storage":20,"active_revision_state":null,"active_revision_id":null,"claimed_size":10,"claimed_modification_time":null,"content_sha1":null}},"name":"report.txt","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',0,'Docs/report.txt');
+INSERT INTO nodes VALUES('vol~old','vol~docs','old.txt',0,3,200,NULL,0,'{"uid":{"volume_id":"vol","link_id":"old"},"parent_uid":{"volume_id":"vol","link_id":"docs"},"kind":{"File":{"media_type":"text/plain","total_size_on_storage":13,"active_revision_state":null,"active_revision_id":null,"claimed_size":3,"claimed_modification_time":null,"content_sha1":null}},"name":"old.txt","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',0,'Docs/old.txt');
+INSERT INTO nodes VALUES('vol~shared','vol~docs','shared.txt',0,4,200,NULL,0,'{"uid":{"volume_id":"vol","link_id":"shared"},"parent_uid":{"volume_id":"vol","link_id":"docs"},"kind":{"File":{"media_type":"text/plain","total_size_on_storage":14,"active_revision_state":null,"active_revision_id":null,"claimed_size":4,"claimed_modification_time":null,"content_sha1":null}},"name":"shared.txt","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',0,'Docs/shared.txt');
+INSERT INTO nodes VALUES('local~dir','vol~root','Offline folder',1,0,200,NULL,0,'{"uid":{"volume_id":"local","link_id":"dir"},"parent_uid":{"volume_id":"vol","link_id":"root"},"kind":"Folder","name":"Offline folder","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',1,'Offline folder');
+INSERT INTO nodes VALUES('local~inner','local~dir','inner.txt',0,5,200,NULL,0,'{"uid":{"volume_id":"local","link_id":"inner"},"parent_uid":{"volume_id":"local","link_id":"dir"},"kind":{"File":{"media_type":"text/plain","total_size_on_storage":15,"active_revision_state":null,"active_revision_id":null,"claimed_size":5,"claimed_modification_time":null,"content_sha1":null}},"name":"inner.txt","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',0,'Offline folder/inner.txt');
+INSERT INTO nodes VALUES('local~part','vol~root','movie.part',0,7,200,NULL,0,'{"uid":{"volume_id":"local","link_id":"part"},"parent_uid":{"volume_id":"vol","link_id":"root"},"kind":{"File":{"media_type":"text/plain","total_size_on_storage":17,"active_revision_state":null,"active_revision_id":null,"claimed_size":7,"claimed_modification_time":null,"content_sha1":null}},"name":"movie.part","creation_time":100,"modification_time":200,"trashed":false,"is_shared":false,"is_shared_publicly":false,"signature_email":null,"membership":null,"direct_role":null,"share_id":null,"photo":null,"album":null,"verification":{"name":"NotSigned","passphrase":"NotSigned","content_key":null,"extended_attributes":null}}',0,'movie.part');
+CREATE TABLE cache_entries (
+  cache_key     TEXT PRIMARY KEY,
+  size_bytes    INTEGER,
+  last_accessed INTEGER,
+  is_pinned     INTEGER NOT NULL DEFAULT 0
+, kind TEXT NOT NULL DEFAULT 'blob');
+CREATE TABLE pins (
+  uid       TEXT PRIMARY KEY,
+  path      TEXT NOT NULL,
+  recursive INTEGER NOT NULL DEFAULT 0
+);
+CREATE TABLE local_files (
+  id       INTEGER PRIMARY KEY,
+  path     TEXT NOT NULL UNIQUE,
+  name     TEXT NOT NULL,
+  is_dir   INTEGER NOT NULL,
+  size     INTEGER NOT NULL DEFAULT 0,
+  mtime    INTEGER NOT NULL DEFAULT 0,
+  scan_gen INTEGER NOT NULL DEFAULT 0
+);
+CREATE TABLE photos (
+  uid          TEXT PRIMARY KEY,
+  capture_time INTEGER NOT NULL,
+  name         TEXT,
+  ratio        REAL,
+  thumb_state  INTEGER NOT NULL DEFAULT 0,
+  seq          INTEGER NOT NULL
+, media_type TEXT, kind INTEGER NOT NULL DEFAULT 0, favorite INTEGER NOT NULL DEFAULT 0, content_hash TEXT, main_uid TEXT, group_key TEXT, resolved_at INTEGER, latitude REAL, longitude REAL, place_id INTEGER, similar_hash INTEGER);
+CREATE TABLE trash (
+  uid    TEXT PRIMARY KEY,
+  name   TEXT NOT NULL,
+  is_dir INTEGER NOT NULL,
+  size   INTEGER NOT NULL DEFAULT 0,
+  mtime  INTEGER NOT NULL DEFAULT 0
+, parent_uid TEXT, trashed_at INTEGER);
+CREATE TABLE device (
+  uid      TEXT PRIMARY KEY,
+  share_id TEXT NOT NULL,
+  root_uid TEXT NOT NULL,
+  name     TEXT NOT NULL,
+  created  INTEGER NOT NULL DEFAULT 0
+);
+CREATE TABLE sync_folder (
+  id              INTEGER PRIMARY KEY,
+  local_path      TEXT NOT NULL UNIQUE,
+  remote_uid      TEXT NOT NULL,
+  remote_share_id TEXT NOT NULL,
+  mode            TEXT NOT NULL DEFAULT 'mirror',
+  state           TEXT NOT NULL DEFAULT 'idle',
+  last_sync       INTEGER NOT NULL DEFAULT 0
+, pending_mode TEXT);
+CREATE TABLE sync_entry (
+  folder_id   INTEGER NOT NULL,
+  rel_path    TEXT NOT NULL,
+  remote_uid  TEXT,
+  local_mtime INTEGER NOT NULL DEFAULT 0,
+  local_size  INTEGER NOT NULL DEFAULT 0,
+  remote_hash TEXT,
+  remote_rev  TEXT, local_mtime_ns INTEGER,
+  PRIMARY KEY (folder_id, rel_path)
+);
+CREATE TABLE activity (
+  id     INTEGER PRIMARY KEY,
+  time   INTEGER NOT NULL,
+  kind   TEXT NOT NULL,
+  target TEXT NOT NULL,
+  detail TEXT NOT NULL DEFAULT '',
+  ok     INTEGER NOT NULL DEFAULT 1
+);
+CREATE TABLE pending_op (
+  id              INTEGER PRIMARY KEY,
+  kind            TEXT NOT NULL,
+  uid             TEXT NOT NULL,
+  blob_path       TEXT,
+  meta_json       TEXT,
+  created_at      INTEGER NOT NULL,
+  attempts        INTEGER NOT NULL DEFAULT 0,
+  last_error      TEXT,
+  next_attempt_at INTEGER NOT NULL DEFAULT 0
+, parent_uid TEXT, name TEXT, claimed_at INTEGER NOT NULL DEFAULT 0, access_deferred_since INTEGER NOT NULL DEFAULT 0);
+INSERT INTO pending_op VALUES(1,'mkdir','local~dir',NULL,NULL,1700000000000,0,NULL,0,'vol~root','Offline folder',4611686018427387903,0);
+INSERT INTO pending_op VALUES(2,'create','local~inner','/blobs/inner','{"len":5,"mtime":1700000000,"based_on":null}',1700000000000,0,NULL,0,'local~dir','inner.txt',0,0);
+INSERT INTO pending_op VALUES(3,'create','local~part','/blobs/part','{"len":5,"mtime":1700000000,"based_on":null}',1700000000000,0,NULL,8000000000000,'vol~root','movie.part',0,0);
+INSERT INTO pending_op VALUES(4,'revision','vol~report','/blobs/report','{"len":5,"mtime":1700000000,"based_on":null}',1700000000000,2,'network unreachable',1700000900000,NULL,NULL,0,0);
+INSERT INTO pending_op VALUES(5,'rename','vol~shared',NULL,'{"original_parent_uid":"vol~docs","original_name":"shared.txt"}',1700000000000,0,NULL,1700000700000,'vol~root','shared-moved.txt',0,1700000100000);
+INSERT INTO pending_op VALUES(6,'trash','vol~old',NULL,NULL,1700000000000,0,NULL,0,NULL,NULL,0,0);
+CREATE TABLE IF NOT EXISTS 'local_fts_data'(id INTEGER PRIMARY KEY, block BLOB);
+INSERT INTO local_fts_data VALUES(1,x'000000');
+INSERT INTO local_fts_data VALUES(10,x'00000000000000');
+CREATE TABLE IF NOT EXISTS 'local_fts_idx'(segid, term, pgno, PRIMARY KEY(segid, term)) WITHOUT ROWID;
+CREATE TABLE IF NOT EXISTS 'local_fts_docsize'(id INTEGER PRIMARY KEY, sz BLOB);
+CREATE TABLE IF NOT EXISTS 'local_fts_config'(k PRIMARY KEY, v) WITHOUT ROWID;
+INSERT INTO local_fts_config VALUES('version',4);
+CREATE TABLE share_access (
+  root_uid TEXT PRIMARY KEY,
+  access   TEXT NOT NULL
+           CHECK (access IN ('owner', 'editor', 'viewer', 'unknown'))
+);
+CREATE TABLE mount (
+  id              INTEGER PRIMARY KEY,
+  kind            TEXT NOT NULL
+                  CHECK (kind IN ('myfiles', 'device', 'shared')),
+  sync_folder_id  INTEGER REFERENCES sync_folder(id) ON DELETE CASCADE,
+  share_root_uid  TEXT,
+  local_path      TEXT NOT NULL DEFAULT '',
+  root_uid        TEXT NOT NULL DEFAULT '',
+  root_share_id   TEXT NOT NULL DEFAULT '',
+  mode            TEXT NOT NULL DEFAULT 'unknown',
+  access          TEXT NOT NULL DEFAULT 'rw'
+                  CHECK (access IN ('rw', 'ro')),
+  CHECK (
+    (kind = 'myfiles' AND sync_folder_id IS NULL AND share_root_uid IS NULL)
+    OR
+    (kind = 'device' AND sync_folder_id IS NOT NULL AND share_root_uid IS NULL)
+    OR
+    (kind = 'shared' AND sync_folder_id IS NULL AND share_root_uid IS NOT NULL)
+  )
+);
+CREATE TABLE albums (
+  uid           TEXT PRIMARY KEY,
+  name          TEXT NOT NULL,
+  photo_count   INTEGER NOT NULL DEFAULT 0,
+  cover_uid     TEXT,
+  last_activity INTEGER,
+  shared        INTEGER NOT NULL DEFAULT 0,
+  seq           INTEGER NOT NULL
+);
+CREATE TABLE album_photos (
+  album_uid    TEXT NOT NULL,
+  uid          TEXT NOT NULL,
+  capture_time INTEGER NOT NULL,
+  name         TEXT,
+  media_type   TEXT,
+  kind         INTEGER NOT NULL DEFAULT 0,
+  ratio        REAL,
+  thumb_state  INTEGER NOT NULL DEFAULT 0,
+  seq          INTEGER NOT NULL,
+  PRIMARY KEY (album_uid, uid)
+);
+CREATE TABLE IF NOT EXISTS 'nodes_fts_data'(id INTEGER PRIMARY KEY, block BLOB);
+INSERT INTO nodes_fts_data VALUES(1,x'083850');
+INSERT INTO nodes_fts_data VALUES(10,x'000000000108080008010101020101030101040101050101060101070101080101');
+INSERT INTO nodes_fts_data VALUES(137438953473,x'000000340430206669010204010366696c0102050103696c6501020601036c657301020701036d79200102020103792066010203040808080808');
+INSERT INTO nodes_fts_data VALUES(274877906945,x'0000001a0430646f6302080201010201036f6373020803010103040b');
+INSERT INTO nodes_fts_data VALUES(412316860417,x'0000008b04302e747803080801010d01032f72650306010106010363732f03060101040103646f630306010102010365706f03080301010801036f637303060101030202727403080501010a0103706f7203080401010901037265700308020101070202742e03080601010b0103732f7203060101050103742e7403080701010c0202787403080901010e040b0a0a0a0b0a0a0b0b0a0a0b');
+INSERT INTO nodes_fts_data VALUES(549755813889,x'0000006b04302e747804080501010a01032f6f6c0406010106010363732f04060101040103642e7404080401010902026f63040601010201036c642e04080301010801036f6373040601010302026c640408020101070103732f6f0406010105010374787404080601010b040b0a0a0b090b0a0a0a');
+INSERT INTO nodes_fts_data VALUES(687194767361,x'0000008c04302e747805080801010d01032f736805060101060103617265050804010109010363732f05060101040103642e7405080701010c02026f630506010102010365642e05080601010b010368617205080301010801036f63730506010103010372656405080501010a0103732f73050601010502026861050802010107010374787405080901010e040b0a0b0a0b090b0b0a0b0a0a');
+INSERT INTO nodes_fts_data VALUES(824633720833,x'00000084043020666f060809010109010364657206080d01010d0103652066060808010108010366666c06080301010302026c6906080401010402026f6c06080a01010a0103696e6506080601010601036c646506080c01010c0202696e06080501010501036e652006080701010701036f666606080201010202026c6406080b01010b040b0b0b0b0a0a0b0b0a0b0b');
+INSERT INTO nodes_fts_data VALUES(962072674305,x'000000da043020666f070601010901032e747807080701011601032f696e07060101100103646572070601010d010365206607060101080202722e07080501011403012f070601010e010366666c070601010302026c69070601010402026f6c070601010a0103696e65070601010603016e07080201011101036c6465070601010c0202696e070601010501036e6520070601010703017207080401011302026e6507080301011201036f6666070601010202026c64070601010b0103722e7407080601011502022f69070601010f0103747874070808010117040a0b0a0a0a0a080a09090a090a090a090a0a090b09');
+INSERT INTO nodes_fts_data VALUES(1099511627777,x'0000005c04302e706108080701010701036172740808090101090103652e70080806010106010369652e08080501010501036d6f7608080201010201036f766908080301010301037061720808080101080103766965080804010104040b0b0b0b0b0b0b');
+CREATE TABLE IF NOT EXISTS 'nodes_fts_idx'(segid, term, pgno, PRIMARY KEY(segid, term)) WITHOUT ROWID;
+INSERT INTO nodes_fts_idx VALUES(1,x'',2);
+INSERT INTO nodes_fts_idx VALUES(2,x'',2);
+INSERT INTO nodes_fts_idx VALUES(3,x'',2);
+INSERT INTO nodes_fts_idx VALUES(4,x'',2);
+INSERT INTO nodes_fts_idx VALUES(5,x'',2);
+INSERT INTO nodes_fts_idx VALUES(6,x'',2);
+INSERT INTO nodes_fts_idx VALUES(7,x'',2);
+INSERT INTO nodes_fts_idx VALUES(8,x'',2);
+CREATE TABLE IF NOT EXISTS 'nodes_fts_content'(id INTEGER PRIMARY KEY, c0, c1);
+INSERT INTO nodes_fts_content VALUES(1,'My Files','');
+INSERT INTO nodes_fts_content VALUES(2,'Docs','Docs');
+INSERT INTO nodes_fts_content VALUES(3,'report.txt','Docs/report.txt');
+INSERT INTO nodes_fts_content VALUES(4,'old.txt','Docs/old.txt');
+INSERT INTO nodes_fts_content VALUES(5,'shared.txt','Docs/shared.txt');
+INSERT INTO nodes_fts_content VALUES(6,'Offline folder','Offline folder');
+INSERT INTO nodes_fts_content VALUES(7,'inner.txt','Offline folder/inner.txt');
+INSERT INTO nodes_fts_content VALUES(8,'movie.part','movie.part');
+CREATE TABLE IF NOT EXISTS 'nodes_fts_docsize'(id INTEGER PRIMARY KEY, sz BLOB);
+INSERT INTO nodes_fts_docsize VALUES(1,x'0600');
+INSERT INTO nodes_fts_docsize VALUES(2,x'0202');
+INSERT INTO nodes_fts_docsize VALUES(3,x'080d');
+INSERT INTO nodes_fts_docsize VALUES(4,x'050a');
+INSERT INTO nodes_fts_docsize VALUES(5,x'080d');
+INSERT INTO nodes_fts_docsize VALUES(6,x'0c0c');
+INSERT INTO nodes_fts_docsize VALUES(7,x'0716');
+INSERT INTO nodes_fts_docsize VALUES(8,x'0808');
+CREATE TABLE IF NOT EXISTS 'nodes_fts_config'(k PRIMARY KEY, v) WITHOUT ROWID;
+INSERT INTO nodes_fts_config VALUES('version',4);
+CREATE TABLE own_sealed_rev (
+  uid         TEXT PRIMARY KEY,
+  revision_id TEXT NOT NULL,
+  sealed_at   INTEGER NOT NULL
+);
+INSERT INTO own_sealed_rev VALUES('vol~report','rev-1',1700000000000);
+PRAGMA writable_schema=ON;
+INSERT INTO sqlite_schema(type,name,tbl_name,rootpage,sql)VALUES('table','local_fts','local_fts',0,'CREATE VIRTUAL TABLE local_fts USING fts5(
+  name, path, content=''local_files'', content_rowid=''id'', tokenize=''trigram''
+)');
+INSERT INTO sqlite_schema(type,name,tbl_name,rootpage,sql)VALUES('table','nodes_fts','nodes_fts',0,'CREATE VIRTUAL TABLE nodes_fts USING fts5(
+  name, path, tokenize=''trigram''
+)');
+CREATE TRIGGER mount_sync_folder_insert
+AFTER INSERT ON sync_folder
+BEGIN
+  INSERT OR IGNORE INTO mount (kind, sync_folder_id)
+  VALUES ('device', NEW.id);
+END;
+CREATE INDEX idx_nodes_parent ON nodes(parent_uid);
+CREATE INDEX idx_photos_seq ON photos(seq);
+CREATE INDEX pending_op_uid ON pending_op(uid);
+CREATE INDEX pending_op_parent ON pending_op(parent_uid);
+CREATE INDEX cache_entries_lru ON cache_entries(kind, last_accessed);
+CREATE INDEX idx_nodes_name_nocase ON nodes(name COLLATE NOCASE);
+CREATE INDEX idx_local_files_name_nocase
+  ON local_files(name COLLATE NOCASE);
+CREATE UNIQUE INDEX mount_myfiles
+  ON mount(kind) WHERE kind = 'myfiles';
+CREATE UNIQUE INDEX mount_device
+  ON mount(sync_folder_id) WHERE kind = 'device';
+CREATE UNIQUE INDEX mount_shared
+  ON mount(share_root_uid) WHERE kind = 'shared';
+CREATE INDEX idx_album_photos_seq ON album_photos(album_uid, seq);
+CREATE INDEX idx_album_photos_uid ON album_photos(uid);
+CREATE INDEX idx_photos_favorite ON photos(favorite, seq);
+CREATE INDEX idx_sync_entry_remote_uid ON sync_entry(remote_uid);
+CREATE INDEX idx_local_files_scan_gen ON local_files(scan_gen);
+CREATE INDEX idx_nodes_parent_live ON nodes(parent_uid) WHERE trashed = 0;
+CREATE INDEX idx_pending_op_claimed
+    ON pending_op(uid) WHERE claimed_at <> 0;
+CREATE INDEX idx_trash_parent ON trash(parent_uid);
+CREATE INDEX idx_photos_group ON photos(group_key);
+CREATE INDEX idx_photos_unresolved ON photos(resolved_at);
+CREATE INDEX idx_photos_place ON photos(place_id);
+PRAGMA writable_schema=OFF;
+COMMIT;
@@ -9,7 +9,7 @@ use super::Db;
 use crate::Result;

 /// Current schema version. Bump on every forward migration added below.
-pub(super) const SCHEMA_VERSION: i64 = 31;
+pub(super) const SCHEMA_VERSION: i64 = 36;

 impl Db {
    pub(super) fn migrate(&self) -> Result<()> {
@@ -270,6 +270,84 @@ impl Db {
                tx.execute_batch(MIGRATION_V31)?;
            }
        }
+        if current < 32 {
+            // Data only, so safe to repeat; each table is guarded for a very
+            // old fixture that never had it.
+            for table in ["photos", "album_photos"] {
+                let has_table: bool = tx.query_row(
+                    "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = ?1",
+                    [table],
+                    |row| row.get::<_, i64>(0),
+                )? > 0;
+                if has_table {
+                    tx.execute(&MIGRATION_V32.replace("{table}", table), [])?;
+                }
+            }
+        }
+        if current < 33 {
+            // Same guards as V26-V31.
+            let has_column: bool = tx.query_row(
+                "SELECT COUNT(*) FROM pragma_table_info('photos') WHERE name = 'place_id'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            let has_photos: bool = tx.query_row(
+                "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'photos'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            if has_photos && !has_column {
+                tx.execute_batch(MIGRATION_V33)?;
+            }
+        }
+        if current < 34 {
+            // Same guards as V26-V33.
+            let has_column: bool = tx.query_row(
+                "SELECT COUNT(*) FROM pragma_table_info('photos') WHERE name = 'similar_hash'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            let has_photos: bool = tx.query_row(
+                "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'photos'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            if has_photos && !has_column {
+                tx.execute_batch(MIGRATION_V34)?;
+            }
+        }
+        if current < 35 {
+            // Same guards as V26-V34.
+            let has_column: bool = tx.query_row(
+                "SELECT COUNT(*) FROM pragma_table_info('trash') WHERE name = 'trashed_at'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            let has_trash: bool = tx.query_row(
+                "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'trash'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            if has_trash && !has_column {
+                tx.execute_batch(MIGRATION_V35)?;
+            }
+        }
+        if current < 36 {
+            // Same guards as V26-V35.
+            let has_column: bool = tx.query_row(
+                "SELECT COUNT(*) FROM pragma_table_info('nodes') WHERE name = 'lid'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            let has_nodes: bool = tx.query_row(
+                "SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name = 'nodes'",
+                [],
+                |row| row.get::<_, i64>(0),
+            )? > 0;
+            if has_nodes && !has_column {
+                tx.execute_batch(MIGRATION_V36)?;
+            }
+        }
        tx.execute(
            "INSERT INTO sync_state (key, value) VALUES ('schema_version', ?1)
             ON CONFLICT(key) DO UPDATE SET value = excluded.value",
@@ -684,7 +762,7 @@ CREATE INDEX idx_album_photos_seq ON album_photos(album_uid, seq);
 CREATE INDEX idx_album_photos_uid ON album_photos(uid);
 ";

-/// V20: whether a photo is a favourite.
+/// V20: whether a photo is a favorite.
 ///
 /// A column rather than a tag table: `Favorite` is the only Proton photo tag a
 /// user sets by hand (the rest — Video, Screenshot, Selfie, Raw… — are the
@@ -938,7 +1016,7 @@ CREATE INDEX IF NOT EXISTS idx_photos_group ON photos(group_key);
 /// Schema v31: which photos a refresh still has to read from the server.
 ///
 /// A refresh used to resolve every photo's node to learn its name, media type,
-/// favourite tag, content hash and photo relation — minutes of round-trips for a
+/// favorite tag, content hash and photo relation — minutes of round-trips for a
 /// library of any size, repeated every time the timeline went stale. `resolved_at`
 /// records that the work was already done, so a refresh only reads the photos it
 /// has never read and the ones a remote event marked stale (`resolved_at = NULL`).
@@ -952,3 +1030,85 @@ ALTER TABLE photos ADD COLUMN resolved_at INTEGER;
 CREATE INDEX IF NOT EXISTS idx_photos_unresolved ON photos(resolved_at);
 UPDATE photos SET resolved_at = strftime('%s','now') WHERE name IS NOT NULL;
 ";
+
+/// V32: give videos written off as un-thumbnailable another chance.
+///
+/// Before local video thumbnails, the fallback fed a video's bytes to the image
+/// decoder, which could only fail, and that failure was recorded as the
+/// permanent "no thumbnail" verdict. Run once per table in `{table}`.
+const MIGRATION_V32: &str = "UPDATE {table} SET thumb_state = 0 WHERE kind = 1 AND thumb_state = 2";
+
+/// Schema v33: where each photo was taken.
+///
+/// `latitude` and `longitude` come from the location other clients write into
+/// a photo's extended attributes; `place_id` is the GeoNames id of the nearest
+/// town (see `crate::places`), so the Places view is a plain `GROUP BY`.
+///
+/// Every photo is marked unresolved, so the next refresh reads the location of
+/// the whole library once. That is the backfill: the metadata is on the node
+/// the refresh reads anyway, and nothing has to be downloaded.
+const MIGRATION_V33: &str = "
+ALTER TABLE photos ADD COLUMN latitude REAL;
+ALTER TABLE photos ADD COLUMN longitude REAL;
+ALTER TABLE photos ADD COLUMN place_id INTEGER;
+CREATE INDEX IF NOT EXISTS idx_photos_place ON photos(place_id);
+UPDATE photos SET resolved_at = NULL;
+";
+
+/// Schema v34: what each photo looks like, for finding similar ones.
+///
+/// `similar_hash` is a 64-bit difference hash of the photo's thumbnail (see
+/// `crate::similar`): resized and re-encoded copies of one picture land a few
+/// bits apart, where the server's `content_hash` only matches byte-identical
+/// files. `NULL` until the daemon has hashed the thumbnail, which it does as
+/// thumbnails arrive and when the similar-photo finder asks for the rest.
+const MIGRATION_V34: &str = "
+ALTER TABLE photos ADD COLUMN similar_hash INTEGER;
+";
+
+/// Schema v35: when each trashed node went to the trash.
+///
+/// The API does not tell this client, so `trashed_at` is when the daemon first
+/// saw the node in the trash, in epoch seconds. `NULL` when it cannot say: rows
+/// from before this version, and nodes found by a refresh that did not follow a
+/// complete one, which may have been in the trash for a long time already.
+const MIGRATION_V35: &str = "
+ALTER TABLE trash ADD COLUMN trashed_at INTEGER;
+";
+
+/// Schema v36: every node row has a local id (`lid`), phase 2 of
+/// docs/MILESTONE-3.0.0.md.
+///
+/// The `uid` was the row's key, so a node had no identity until Drive minted
+/// one, and a create that landed moved its row to a new key. The `lid` is given
+/// when the row is first written and never changes or comes back, which is what
+/// `AUTOINCREMENT` adds over a plain rowid. It takes the old rowid, so the
+/// search index, keyed by rowid since v15, stays valid. The `uid` becomes
+/// nullable for a node that is not on Drive yet.
+const MIGRATION_V36: &str = "
+CREATE TABLE nodes_v36 (
+  lid           INTEGER PRIMARY KEY AUTOINCREMENT,
+  uid           TEXT UNIQUE,
+  parent_uid    TEXT,
+  name          TEXT NOT NULL,
+  is_dir        INTEGER NOT NULL,
+  size          INTEGER,
+  mtime         INTEGER NOT NULL,
+  revision_hash TEXT,
+  trashed       INTEGER NOT NULL DEFAULT 0,
+  node_json     TEXT,
+  listed        INTEGER NOT NULL DEFAULT 0,
+  path          TEXT
+);
+INSERT INTO nodes_v36
+  (lid, uid, parent_uid, name, is_dir, size, mtime, revision_hash, trashed, node_json, listed,
+   path)
+  SELECT rowid, uid, parent_uid, name, is_dir, size, mtime, revision_hash, trashed, node_json,
+         listed, path
+    FROM nodes;
+DROP TABLE nodes;
+ALTER TABLE nodes_v36 RENAME TO nodes;
+CREATE INDEX idx_nodes_parent ON nodes(parent_uid);
+CREATE INDEX idx_nodes_name_nocase ON nodes(name COLLATE NOCASE);
+CREATE INDEX idx_nodes_parent_live ON nodes(parent_uid) WHERE trashed = 0;
+";
@@ -56,10 +56,11 @@ pub use local::LocalFileHit;
 pub use maintenance::{DbStats, VacuumOutcome};
 pub use nodes::{PublishedSharedRoot, SearchHit, StoredNode};
 pub use ops::{
-    AttachedBlob, LOCAL_VOLUME, OP_CREATE, OP_MKDIR, OP_RENAME, OP_REVISION, OP_TRASH,
-    PARK_EXPIRY_MS, PARK_UNTIL, PendingCounts, PendingOp, RenameMeta, op_supersedes,
+    AttachedBlob, CreateLanding, FAILING_ATTEMPTS, LOCAL_VOLUME, OP_CREATE, OP_MKDIR, OP_RENAME,
+    OP_REVISION, OP_TRASH, PARK_EXPIRY_MS, PARK_UNTIL, PendingCounts, PendingOp, RenameMeta,
+    op_supersedes,
 };
-pub use photos::{StoredPhoto, THUMB_HAVE, THUMB_NONE, THUMB_UNKNOWN, TimelineRow};
+pub use photos::{StoredPhoto, StoredPlace, THUMB_HAVE, THUMB_NONE, THUMB_UNKNOWN, TimelineRow};
 pub use pins::PinRow;
 pub use sync::{StoredSyncEntry, StoredSyncFolder};
 pub use trash::StoredTrash;
@@ -171,6 +171,7 @@ impl Db {
                pending_mode: pending_mode.as_deref().map(MountMode::from),
                mounted: false,
                progress: None,
+                paused: false,
            });
        }
        Ok(mounts)
@@ -17,6 +17,8 @@ use super::utils::{
 pub struct StoredNode {
    pub node: Node,
    pub listed: bool,
+    /// The row's local id ([`Db::lid_of`]).
+    pub lid: i64,
 }

 /// One full-text search match: the stored [`Node`] plus its mountpoint-relative
@@ -289,7 +291,8 @@ impl Db {
        let uid_str = parent_uid.to_string();
        let conn = self.read();
        let count: i64 = conn.query_row(
-            "SELECT COUNT(*) FROM nodes WHERE parent_uid = ?1 AND trashed = 0",
+            "SELECT COUNT(*) FROM nodes
+             WHERE parent_uid = ?1 AND trashed = 0 AND node_json IS NOT NULL",
            params![uid_str],
            |row| row.get(0),
        )?;
@@ -305,9 +308,11 @@ impl Db {
    pub fn node_path(&self, uid: &str) -> Result<Option<String>> {
        let conn = self.read();
        let exists: Option<i64> = conn
-            .query_row("SELECT 1 FROM nodes WHERE uid = ?1", params![uid], |r| {
-                r.get(0)
-            })
+            .query_row(
+                "SELECT 1 FROM nodes WHERE uid = ?1 AND node_json IS NOT NULL",
+                params![uid],
+                |r| r.get(0),
+            )
            .optional()?;
        if exists.is_none() {
            return Ok(None);
@@ -355,6 +360,22 @@ impl Db {
    /// than [`TRIGRAM_MIN`] fall back to a `LIKE` scan since trigram indexes
    /// nothing below 3 chars.
    pub fn search(&self, query: &str, limit: usize) -> Result<Vec<SearchHit>> {
+        self.search_in(query, limit, None)
+    }
+
+    /// [`search`](Self::search) restricted to the subtree under the
+    /// mountpoint-relative folder `scope`. `None` or an empty scope searches
+    /// everything.
+    pub fn search_in(
+        &self,
+        query: &str,
+        limit: usize,
+        scope: Option<&str>,
+    ) -> Result<Vec<SearchHit>> {
+        let scope = scope.map(|s| s.trim_matches('/')).filter(|s| !s.is_empty());
+        // Rows whose path is not persisted yet pass the SQL filter and are
+        // checked once their path is walked below.
+        let scope_pat = scope.map(|s| format!("{}/%", like_escape(s)));
        let query = query.trim();
        if query.is_empty() {
            return Ok(Vec::new());
@@ -365,9 +386,10 @@ impl Db {
            let mut stmt = conn.prepare(
                "SELECT node_json, uid, path FROM nodes
                 WHERE name LIKE ?1 ESCAPE '\\' AND trashed = 0 AND node_json IS NOT NULL
+                   AND (?3 IS NULL OR path IS NULL OR path LIKE ?3 ESCAPE '\\')
                 ORDER BY name LIMIT ?2",
            )?;
-            collect_hits(stmt.query_map(params![pat, limit as i64], hit_row)?)?
+            collect_hits(stmt.query_map(params![pat, limit as i64, scope_pat], hit_row)?)?
        } else {
            // Escape double quotes and quote each term, then combine with AND so
            // all terms must match but can appear in any order or position.
@@ -380,9 +402,10 @@ impl Db {
                "SELECT n.node_json, n.uid, n.path
                 FROM nodes_fts f JOIN nodes n ON n.rowid = f.rowid
                 WHERE f.name MATCH ?1 AND n.trashed = 0 AND n.node_json IS NOT NULL
+                   AND (?3 IS NULL OR n.path IS NULL OR n.path LIKE ?3 ESCAPE '\\')
                 ORDER BY f.rank LIMIT ?2",
            )?;
-            collect_hits(stmt.query_map(params![phrase, limit as i64], hit_row)?)?
+            collect_hits(stmt.query_map(params![phrase, limit as i64, scope_pat], hit_row)?)?
        };

        let mut hits = Vec::with_capacity(rows.len());
@@ -392,6 +415,13 @@ impl Db {
                Some(path) => path,
                None => walk_path_of(&conn, &uid)?,
            };
+            if let Some(scope) = scope
+                && !path
+                    .strip_prefix(scope)
+                    .is_some_and(|rest| rest.starts_with('/'))
+            {
+                continue;
+            }
            hits.push(SearchHit { node, path });
        }
        Ok(hits)
@@ -486,17 +516,17 @@ impl Db {
    pub fn load_all(&self) -> Result<Vec<StoredNode>> {
        let conn = self.read();
        let mut stmt =
-            conn.prepare("SELECT node_json, listed FROM nodes WHERE node_json IS NOT NULL")?;
+            conn.prepare("SELECT node_json, listed, lid FROM nodes WHERE node_json IS NOT NULL")?;
        let rows = stmt.query_map([], |row| {
            let json: String = row.get(0)?;
            let listed: i64 = row.get(1)?;
-            Ok((json, listed != 0))
+            Ok((json, listed != 0, row.get(2)?))
        })?;
        let mut out = Vec::new();
        for row in rows {
-            let (json, listed) = row?;
+            let (json, listed, lid) = row?;
            let node: Node = serde_json::from_str(&json)?;
-            out.push(StoredNode { node, listed });
+            out.push(StoredNode { node, listed, lid });
        }
        Ok(out)
    }
@@ -519,6 +549,57 @@ impl Db {
        }
    }

+    /// The local id of the node stored under `uid`, or `None` when it has no
+    /// row. It stays the same for as long as the row exists, including when a
+    /// create lands and the row takes the uid Drive gave it.
+    pub fn lid_of(&self, uid: &str) -> Result<Option<i64>> {
+        let conn = self.read();
+        Ok(conn
+            .query_row("SELECT lid FROM nodes WHERE uid = ?1", params![uid], |r| {
+                r.get(0)
+            })
+            .optional()?)
+    }
+
+    /// The local id of each node, in order, giving a row to each that has none.
+    ///
+    /// A new row is only a stub: it has no `node_json`, so no listing or search
+    /// returns it until the node is upserted, which the caller still owes. That
+    /// keeps this cheap enough to call with the inode lock held, which is
+    /// where an inode number is first needed.
+    pub fn lids_for(&self, nodes: &[&Node]) -> Result<Vec<i64>> {
+        let mut conn = self.conn.lock();
+        let tx = conn.transaction()?;
+        let mut lids = Vec::with_capacity(nodes.len());
+        {
+            let mut known = tx.prepare_cached("SELECT lid FROM nodes WHERE uid = ?1")?;
+            let mut stub = tx.prepare_cached(
+                "INSERT INTO nodes (uid, parent_uid, name, is_dir, mtime, trashed)
+                 VALUES (?1, ?2, ?3, ?4, ?5, ?6)",
+            )?;
+            for node in nodes {
+                let uid = node.uid.to_string();
+                let lid = match known.query_row(params![uid], |r| r.get(0)).optional()? {
+                    Some(lid) => lid,
+                    None => {
+                        stub.execute(params![
+                            uid,
+                            node.parent_uid.as_ref().map(ToString::to_string),
+                            node.name,
+                            node.is_folder() as i64,
+                            node.modification_time,
+                            node.trashed as i64,
+                        ])?;
+                        tx.last_insert_rowid()
+                    }
+                };
+                lids.push(lid);
+            }
+        }
+        tx.commit()?;
+        Ok(lids)
+    }
+
    /// Read the persisted incremental-sync cursor (a `DriveEventId`), if any.
    /// The daemon resumes from this on restart instead of reseeding to the
    /// server head, so changes made while unmounted are still applied (P2).
@@ -534,6 +615,15 @@ impl Db {
        if listed != Some(1) {
            return Ok(None);
        }
+        drop(conn);
+        self.known_children(parent).map(Some)
+    }
+
+    /// The children the DB knows under `parent`, whether or not the folder's
+    /// listing is still marked complete. Only for when nothing better can be
+    /// had: a listing dropped as stale may miss or keep a child.
+    pub fn known_children(&self, parent: &NodeUid) -> Result<Vec<Node>> {
+        let conn = self.read();
        let mut stmt = conn.prepare(
            "SELECT node_json FROM nodes
             WHERE parent_uid = ?1 AND node_json IS NOT NULL AND trashed = 0",
@@ -543,7 +633,7 @@ impl Db {
        for json in rows {
            out.push(serde_json::from_str(&json?)?);
        }
-        Ok(Some(out))
+        Ok(out)
    }

    // --- Content-cache LRU index (P4) -------------------------------------
@@ -565,6 +655,60 @@ struct PriorRow {
    trashed: bool,
 }

+/// Hand a drained placeholder's row, and the rows below it, to the real uid it
+/// landed as.
+///
+/// Dropping the placeholder row and waiting for the server's copy of the real
+/// node left a window with no row for either uid. A queued child drained in
+/// that window found no authority for its parent, re-read it over the network
+/// and was deferred five seconds behind a folder that had just landed
+/// (`docs/BUGS.md` B120). The placeholder's own node, readdressed, stands in
+/// until the server's copy is upserted over it. A row the real uid already
+/// has is newer than the placeholder, so its node is kept, under the
+/// placeholder's `lid`: the node was known by that one first.
+pub(super) fn adopt_placeholder_row_tx(
+    tx: &Transaction<'_>,
+    local: &str,
+    real: &str,
+) -> Result<()> {
+    tx.execute(
+        "UPDATE nodes SET parent_uid = ?2 WHERE parent_uid = ?1",
+        params![local, real],
+    )?;
+    let row: Option<(i64, Option<String>)> = tx
+        .query_row(
+            "SELECT lid, node_json FROM nodes WHERE uid = ?1",
+            params![local],
+            |row| Ok((row.get(0)?, row.get(1)?)),
+        )
+        .optional()?;
+    let Some((lid, json)) = row else {
+        return Ok(());
+    };
+    let known: Option<(i64, Option<String>)> = tx
+        .query_row(
+            "SELECT lid, node_json FROM nodes WHERE uid = ?1",
+            params![real],
+            |row| Ok((row.get(0)?, row.get(1)?)),
+        )
+        .optional()?;
+    if let Some((known_lid, _)) = known {
+        tx.execute("DELETE FROM nodes WHERE lid = ?1", params![known_lid])?;
+        tx.execute("DELETE FROM nodes_fts WHERE rowid = ?1", params![known_lid])?;
+    }
+    tx.execute(
+        "UPDATE nodes SET uid = ?2 WHERE lid = ?1",
+        params![lid, real],
+    )?;
+    let json = known.and_then(|(_, known_json)| known_json).or(json);
+    let (Some(json), Some(real)) = (json, parse_node_uid(real)) else {
+        return Ok(());
+    };
+    let mut node: Node = serde_json::from_str(&json)?;
+    node.uid = real;
+    upsert_node_tx(tx, &node)
+}
+
 fn upsert_node_tx(tx: &Transaction<'_>, node: &Node) -> Result<()> {
    let json = serde_json::to_string(node)?;
    let uid = node.uid.to_string();
@@ -716,8 +860,10 @@ fn reindex_subtree_tx(
    let mut set_path = tx.prepare("UPDATE nodes SET path = ?2 WHERE rowid = ?1")?;
    let mut unindex = tx.prepare("DELETE FROM nodes_fts WHERE rowid = ?1")?;
    let mut index = tx.prepare(
+        // Not a stub row (`Db::lids_for`): it is indexed when its node is
+        // written.
        "INSERT INTO nodes_fts (rowid, name, path)
-         SELECT rowid, name, ?2 FROM nodes WHERE rowid = ?1",
+         SELECT rowid, name, ?2 FROM nodes WHERE rowid = ?1 AND node_json IS NOT NULL",
    )?;
    for (rowid, path, blocked) in descendants {
        set_path.execute(params![rowid, path])?;
@@ -6,6 +6,7 @@ use rusqlite::{OptionalExtension, params};
 use serde::{Deserialize, Serialize};

 use super::Db;
+use super::nodes::adopt_placeholder_row_tx;
 use crate::Result;

 /// The `kind` of a [`PendingOp`] that uploads a staged file as a new revision.
@@ -44,6 +45,12 @@ pub const OP_RENAME: &str = "rename";
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct RenameMeta {
    pub original_parent_uid: String,
+    /// The node's name on Drive when the first of its queued renames was made,
+    /// kept across the renames that replace the row, like the parent. With it
+    /// the drain knows where the node should still be when the op lands.
+    /// `None` on a row queued before this field existed.
+    #[serde(default)]
+    pub original_name: Option<String>,
 }

 /// The `kind` of a [`PendingOp`] that trashes a node the server knows about
@@ -66,6 +73,63 @@ pub fn op_supersedes(kind: &str) -> bool {
    matches!(kind, OP_REVISION | OP_RENAME | OP_TRASH)
 }

+/// Delete the ops that removing `uid` takes with it, returning the staged blobs
+/// they held.
+///
+/// That is every op for `uid` or for anything queued beneath it, plus the
+/// revisions of files the node tree places beneath it. A revision op carries
+/// no `parent_uid`, so the queue alone cannot tell that its file sits inside
+/// a removed folder: the upload outlived the folder, failed forever against a
+/// trashed node, and kept its blob on disk (`docs/BUGS.md` B102).
+///
+/// "Queued beneath it" starts from every folder the node tree places there,
+/// not only from `uid`. A create in a subfolder that already exists on Drive
+/// names that subfolder as its parent, so following the queue from `uid` alone
+/// missed it: a parked one kept its blob for good, and a due one would have
+/// been made in the root once its folder turned out trashed (`docs/BUGS.md`
+/// B116).
+///
+/// Other ops are taken from the node tree only for revisions. A queued rename
+/// that moved a node *into* the folder has to land, or the node would stay
+/// where it was on the server instead of going to the trash with the folder.
+fn drop_doomed_ops(tx: &rusqlite::Transaction<'_>, uid: &str) -> Result<Vec<String>> {
+    const DOOMED: &str = "
+        WITH RECURSIVE
+          below(uid) AS (
+            SELECT ?1
+            UNION
+            SELECT n.uid FROM nodes n JOIN below b ON n.parent_uid = b.uid
+          ),
+          queued(uid) AS (
+            SELECT ?1
+            UNION
+            SELECT p.uid FROM pending_op p
+            WHERE p.kind IN ('create', 'mkdir')
+              AND p.parent_uid IN (SELECT uid FROM below)
+            UNION
+            SELECT p.uid FROM pending_op p JOIN queued q ON p.parent_uid = q.uid
+          ),
+          doomed(id) AS (
+            SELECT id FROM pending_op
+            WHERE uid IN (SELECT uid FROM queued)
+               OR (kind = 'revision' AND uid IN (SELECT uid FROM below))
+          )";
+    let blobs: Vec<String> = {
+        let mut stmt = tx.prepare(&format!(
+            "{DOOMED}
+             SELECT blob_path FROM pending_op
+             WHERE id IN (SELECT id FROM doomed) AND blob_path IS NOT NULL"
+        ))?;
+        let rows = stmt.query_map(params![uid], |r| r.get::<_, String>(0))?;
+        rows.collect::<std::result::Result<Vec<_>, _>>()?
+    };
+    tx.execute(
+        &format!("{DOOMED} DELETE FROM pending_op WHERE id IN (SELECT id FROM doomed)"),
+        params![uid],
+    )?;
+    Ok(blobs)
+}
+
 /// The volume id given to a node that exists only on this machine, so far. A
 /// real [`NodeUid`] is `{volume}~{link}`, so a placeholder is `local~<uuid>` and
 /// round-trips through the same `Display`/parse path as any other uid.
@@ -164,6 +228,28 @@ pub struct PendingCounts {
 /// is retrying at the slowest rate it ever will and has been for minutes.
 pub const FAILING_ATTEMPTS: i64 = 6;

+/// A queued create that has landed, for [`Db::finish_create`].
+#[derive(Debug, Clone, Copy)]
+pub struct CreateLanding<'a> {
+    /// The placeholder the node was known by.
+    pub local: &'a str,
+    /// The uid Drive gave it.
+    pub real: &'a str,
+    /// The parent and name the op held when the drain took it.
+    pub sent: (&'a str, &'a str),
+    /// The parent and name the node has on Drive. They differ from `sent`
+    /// when the name was taken or the folder was gone.
+    pub landed: (&'a str, &'a str),
+}
+
+struct CreateRow {
+    blob: Option<String>,
+    meta: Option<String>,
+    parent_uid: Option<String>,
+    name: Option<String>,
+    created_at: i64,
+}
+
 /// The outcome of folding freshly written bytes into a queued create.
 #[derive(Debug, Clone)]
 pub struct AttachedBlob {
@@ -174,6 +260,24 @@ pub struct AttachedBlob {
 }

 impl Db {
+    /// Whether a queued trash still holds `name` somewhere.
+    ///
+    /// A replacing rename or a delete-then-recreate queues the trash of the old
+    /// node ahead of the op that wants its name. With several drain workers the
+    /// later op can run first and find the name still taken; this tells it to
+    /// wait for the trash rather than land under a conflict name.
+    pub fn has_pending_trash_named(&self, name: &str) -> Result<bool> {
+        let conn = self.read();
+        conn.query_row(
+            "SELECT EXISTS(
+                SELECT 1 FROM pending_op WHERE kind = ?1 AND name = ?2
+             )",
+            params![OP_TRASH, name],
+            |row| row.get(0),
+        )
+        .map_err(Into::into)
+    }
+
    /// Whether a specific desired-state operation is still queued for a node.
    pub fn has_pending_op(&self, uid: &str, kind: &str) -> Result<bool> {
        let conn = self.read();
@@ -252,27 +356,9 @@ impl Db {
        name: &str,
        created_at: i64,
    ) -> Result<(i64, Vec<String>)> {
-        const SUBTREE: &str = "
-            WITH RECURSIVE doomed(uid) AS (
-              SELECT ?1
-              UNION
-              SELECT p.uid FROM pending_op p JOIN doomed d ON p.parent_uid = d.uid
-            )";
        let mut conn = self.conn.lock();
        let tx = conn.transaction()?;
-        let blobs: Vec<String> = {
-            let mut stmt = tx.prepare(&format!(
-                "{SUBTREE}
-                 SELECT blob_path FROM pending_op
-                 WHERE uid IN (SELECT uid FROM doomed) AND blob_path IS NOT NULL"
-            ))?;
-            let rows = stmt.query_map(params![uid], |row| row.get::<_, String>(0))?;
-            rows.collect::<std::result::Result<Vec<_>, _>>()?
-        };
-        tx.execute(
-            &format!("{SUBTREE} DELETE FROM pending_op WHERE uid IN (SELECT uid FROM doomed)"),
-            params![uid],
-        )?;
+        let blobs = drop_doomed_ops(&tx, uid)?;
        tx.execute(
            "INSERT INTO pending_op
               (kind, uid, parent_uid, name, blob_path, meta_json, created_at, next_attempt_at)
@@ -326,6 +412,102 @@ impl Db {
        Ok(Some(AttachedBlob { id, superseded }))
    }

+    /// Retire a queued create that has just landed as `real`, and repoint
+    /// everything that named its placeholder, in one transaction.
+    ///
+    /// The drain uploads the blob the create held when it was picked up. A
+    /// write that closes while that upload is on the wire attaches a newer blob
+    /// to the *same row* (`attach_blob_to_create`), so deleting the row by id
+    /// threw that write away: the server kept the older bytes and nothing was
+    /// left queued to replace them. When the row no longer holds `uploaded`, it
+    /// becomes a revision of `real` instead, with its sidecar passed through
+    /// `rewrite` so it names the real node. Returns that blob and sidecar, or
+    /// `None` when the create is simply done.
+    ///
+    /// A rename while the create is on the wire rewrites the row's target
+    /// ([`Db::rewrite_op_target`]), which the create no longer reads. When the
+    /// row names another parent or name than `landing.sent`, a rename of `real`
+    /// to that target is queued in the same transaction, or the move would be
+    /// lost with the row.
+    pub fn finish_create(
+        &self,
+        id: i64,
+        uploaded: Option<&str>,
+        landing: &CreateLanding<'_>,
+        rewrite: impl FnOnce(&str) -> Option<String>,
+    ) -> Result<Option<(String, String)>> {
+        let (local, real) = (landing.local, landing.real);
+        let mut conn = self.conn.lock();
+        let tx = conn.transaction()?;
+        let row: Option<CreateRow> = tx
+            .query_row(
+                "SELECT blob_path, meta_json, parent_uid, name, created_at
+                 FROM pending_op WHERE id = ?1",
+                params![id],
+                |r| {
+                    Ok(CreateRow {
+                        blob: r.get(0)?,
+                        meta: r.get(1)?,
+                        parent_uid: r.get(2)?,
+                        name: r.get(3)?,
+                        created_at: r.get(4)?,
+                    })
+                },
+            )
+            .optional()?;
+        let newer = match &row {
+            Some(CreateRow {
+                blob: Some(blob),
+                meta: Some(meta),
+                ..
+            }) if uploaded != Some(blob.as_str()) => rewrite(meta).map(|meta| (blob.clone(), meta)),
+            _ => None,
+        };
+        match &newer {
+            Some((_, meta)) => {
+                tx.execute(
+                    "UPDATE pending_op
+                     SET kind = ?2, uid = ?3, parent_uid = NULL, name = NULL, meta_json = ?4,
+                         attempts = 0, last_error = NULL, next_attempt_at = 0
+                     WHERE id = ?1",
+                    params![id, OP_REVISION, real, meta],
+                )?;
+            }
+            None => {
+                tx.execute("DELETE FROM pending_op WHERE id = ?1", params![id])?;
+            }
+        }
+        if let Some(CreateRow {
+            parent_uid: Some(parent),
+            name: Some(name),
+            created_at,
+            ..
+        }) = &row
+            && (parent.as_str(), name.as_str()) != landing.sent
+        {
+            let meta = serde_json::to_string(&RenameMeta {
+                original_parent_uid: landing.landed.0.to_string(),
+                original_name: Some(landing.landed.1.to_string()),
+            })?;
+            tx.execute(
+                "DELETE FROM pending_op WHERE uid = ?1 AND kind = ?2",
+                params![real, OP_RENAME],
+            )?;
+            tx.execute(
+                "INSERT INTO pending_op (kind, uid, parent_uid, name, meta_json, created_at)
+                 VALUES (?1, ?2, ?3, ?4, ?5, ?6)",
+                params![OP_RENAME, real, parent, name, meta, created_at],
+            )?;
+        }
+        tx.execute(
+            "UPDATE pending_op SET parent_uid = ?2 WHERE parent_uid = ?1",
+            params![local, real],
+        )?;
+        adopt_placeholder_row_tx(&tx, local, real)?;
+        tx.commit()?;
+        Ok(newer)
+    }
+
    /// Replace the sidecar of a queued op, for a baseline that has moved under
    /// it.
    ///
@@ -428,36 +610,20 @@ impl Db {
    /// and in the user's pending count, for the life of the database.
    ///
    /// Only `create`/`mkdir` ops carry a `parent_uid`, so for a file this
-    /// recursion finds nothing and costs one query.
+    /// recursion finds nothing and costs one query. Revisions of files the
+    /// node tree places beneath `uid` go too; see [`drop_doomed_ops`].
    pub fn delete_ops_for_uid(&self, uid: &str) -> Result<Vec<String>> {
-        const SUBTREE: &str = "
-            WITH RECURSIVE doomed(uid) AS (
-              SELECT ?1
-              UNION
-              SELECT p.uid FROM pending_op p JOIN doomed d ON p.parent_uid = d.uid
-            )";
        let mut conn = self.conn.lock();
        let tx = conn.transaction()?;
-        let blobs: Vec<String> = {
-            let mut stmt = tx.prepare(&format!(
-                "{SUBTREE}
-                 SELECT blob_path FROM pending_op
-                 WHERE uid IN (SELECT uid FROM doomed) AND blob_path IS NOT NULL"
-            ))?;
-            let rows = stmt.query_map(params![uid], |r| r.get::<_, String>(0))?;
-            rows.collect::<std::result::Result<Vec<_>, _>>()?
-        };
-        tx.execute(
-            &format!("{SUBTREE} DELETE FROM pending_op WHERE uid IN (SELECT uid FROM doomed)"),
-            params![uid],
-        )?;
+        let blobs = drop_doomed_ops(&tx, uid)?;
        tx.commit()?;
        Ok(blobs)
    }

    /// Rewrite every queued op that points at a placeholder parent, once that
    /// parent has drained and has a real uid. Also moves the node rows whose
-    /// parent column still names the placeholder, so listings keep resolving.
+    /// parent column still names the placeholder, so listings keep resolving,
+    /// and readdresses the placeholder's own row.
    pub fn remap_local_uid(&self, local: &str, real: &str) -> Result<()> {
        let mut conn = self.conn.lock();
        let tx = conn.transaction()?;
@@ -465,11 +631,7 @@ impl Db {
            "UPDATE pending_op SET parent_uid = ?2 WHERE parent_uid = ?1",
            params![local, real],
        )?;
-        tx.execute(
-            "UPDATE nodes SET parent_uid = ?2 WHERE parent_uid = ?1",
-            params![local, real],
-        )?;
-        tx.execute("DELETE FROM nodes WHERE uid = ?1", params![local])?;
+        adopt_placeholder_row_tx(&tx, local, real)?;
        tx.commit()?;
        Ok(())
    }
@@ -765,6 +927,19 @@ impl Db {
    /// drain replaces it with the uid the server assigns.
    pub const LOCAL_VOLUME: &str = "local";

+    /// Whether op `id` is still queued. A drain worker that claimed it can find
+    /// it gone: the node was deleted, or a newer write superseded it, while the
+    /// worker was talking to the server.
+    pub fn op_exists(&self, id: i64) -> Result<bool> {
+        let conn = self.read();
+        let count: i64 = conn.query_row(
+            "SELECT COUNT(*) FROM pending_op WHERE id = ?1",
+            params![id],
+            |row| row.get(0),
+        )?;
+        Ok(count > 0)
+    }
+
    /// Drop a queued op, once its upload has actually landed.
    pub fn delete_op(&self, id: i64) -> Result<()> {
        let conn = self.conn.lock();
@@ -772,6 +947,31 @@ impl Db {
        Ok(())
    }

+    /// Make one backed-off op due now, for the user's "Retry now". Parked ops are
+    /// left alone: they wait for a rename, not for time, and un-parking one would
+    /// upload a file its writer has not finished. Returns whether a row changed.
+    pub fn retry_op_now(&self, id: i64, now: i64) -> Result<bool> {
+        let conn = self.conn.lock();
+        let changed = conn.execute(
+            "UPDATE pending_op SET next_attempt_at = ?2
+             WHERE id = ?1 AND next_attempt_at > ?2 AND next_attempt_at < ?3",
+            params![id, now, PARK_UNTIL],
+        )?;
+        Ok(changed > 0)
+    }
+
+    /// [`retry_op_now`](Self::retry_op_now) for every op that has failed at
+    /// least once. Returns how many rows changed.
+    pub fn retry_failed_ops_now(&self, now: i64) -> Result<usize> {
+        let conn = self.conn.lock();
+        let changed = conn.execute(
+            "UPDATE pending_op SET next_attempt_at = ?1
+             WHERE attempts > 0 AND next_attempt_at > ?1 AND next_attempt_at < ?2",
+            params![now, PARK_UNTIL],
+        )?;
+        Ok(changed)
+    }
+
    /// Record a failed attempt and when to next try. Leaves the row in place —
    /// the staged bytes are still the only copy of the user's write.
    ///
@@ -3,7 +3,7 @@

 use rusqlite::params;

-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};

 use super::Db;
 use crate::Result;
@@ -42,6 +42,15 @@ pub struct StoredPhoto {
    pub has_raw: bool,
 }

+/// A town photos were taken in: its GeoNames id (see [`crate::places`]), how
+/// many photos it holds, and the newest of them.
+#[derive(Clone, Debug, PartialEq)]
+pub struct StoredPlace {
+    pub id: u32,
+    pub count: usize,
+    pub cover: StoredPhoto,
+}
+
 /// One row of a timeline replacement. Everything but the uid and the capture
 /// time is "what this refresh learned": a `None` keeps whatever is already
 /// stored rather than clearing it, because the timeline DTO carries only the uid
@@ -58,6 +67,8 @@ pub struct TimelineRow {
    /// The main photo this one is *related* to (a live-photo video, a burst
    /// sibling), when the server says it belongs to one.
    pub main_uid: Option<String>,
+    /// Where the photo was taken, as `(latitude, longitude)` in decimal degrees.
+    pub location: Option<(f64, f64)>,
    /// When this refresh resolved the photo's node, if it did at all. `Some`
    /// makes every other field authoritative — including a `None` that means
    /// "the server no longer reports one" — while `None` means the refresh
@@ -86,6 +97,9 @@ struct Learned {
    favorite: bool,
    content_hash: Option<String>,
    main_uid: Option<String>,
+    location: Option<(f64, f64)>,
+    /// What its thumbnail looks like (see [`crate::similar`]).
+    similar_hash: Option<i64>,
    /// When this photo's node was last resolved, kept so a refresh that skips it
    /// does not make it look unresolved again.
    resolved_at: Option<i64>,
@@ -281,7 +295,7 @@ impl Db {
        let learned: HashMap<String, Learned> = {
            let mut stmt = tx.prepare(
                "SELECT uid, name, ratio, thumb_state, media_type, favorite, content_hash, \
-                 main_uid, resolved_at FROM photos",
+                 main_uid, resolved_at, latitude, longitude, similar_hash FROM photos",
            )?;
            let rows = stmt.query_map([], |r| {
                Ok((
@@ -295,6 +309,10 @@ impl Db {
                        content_hash: r.get(6)?,
                        main_uid: r.get(7)?,
                        resolved_at: r.get(8)?,
+                        location: r
+                            .get::<_, Option<f64>>(9)?
+                            .zip(r.get::<_, Option<f64>>(10)?),
+                        similar_hash: r.get(11)?,
                    },
                ))
            })?;
@@ -317,14 +335,20 @@ impl Db {
                    carried.name = row.name.clone();
                    carried.media_type = row.media_type.clone();
                    carried.favorite = row.favorite.unwrap_or(false);
+                    // New bytes may show another picture: hash it again.
+                    if row.content_hash != carried.content_hash {
+                        carried.similar_hash = None;
+                    }
                    carried.content_hash = row.content_hash.clone();
                    carried.main_uid = row.main_uid.clone();
+                    carried.location = row.location;
                } else {
                    carried.name = row.name.clone().or(carried.name);
                    carried.media_type = row.media_type.clone().or(carried.media_type);
                    carried.favorite = row.favorite.unwrap_or(carried.favorite);
                    carried.content_hash = row.content_hash.clone().or(carried.content_hash);
                    carried.main_uid = row.main_uid.clone().or(carried.main_uid);
+                    carried.location = row.location.or(carried.location);
                }
                carried.resolved_at = row.resolved_at.or(carried.resolved_at);
                // The tab this photo lands in is derived here, once, so a page or
@@ -355,8 +379,10 @@ impl Db {
            let mut stmt = tx.prepare(
                "INSERT INTO photos
                   (uid, capture_time, name, ratio, thumb_state, seq, media_type, kind, favorite,
-                    content_hash, main_uid, group_key, resolved_at)
-                 VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13)",
+                    content_hash, main_uid, group_key, resolved_at, latitude, longitude,
+                    place_id, similar_hash)
+                 VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15,
+                         ?16, ?17)",
            )?;
            for (seq, ((row, carried, kind), group_key)) in
                resolved.iter().zip(group_keys.iter()).enumerate()
@@ -375,6 +401,13 @@ impl Db {
                    carried.main_uid,
                    group_key,
                    carried.resolved_at,
+                    carried.location.map(|(lat, _)| lat),
+                    carried.location.map(|(_, lon)| lon),
+                    carried
+                        .location
+                        .and_then(|(lat, lon)| crate::places::nearest(lat, lon))
+                        .map(|city| city.id),
+                    carried.similar_hash,
                ])?;
            }
        }
@@ -447,6 +480,14 @@ impl Db {
                albums.execute([uid])?;
            }
        }
+        // A group whose representative went is left pointing at nothing, which
+        // drops its other files off every page. Make them stand alone until the
+        // next refresh groups them again.
+        tx.execute(
+            "UPDATE photos SET group_key = NULL WHERE group_key IS NOT NULL \
+             AND group_key NOT IN (SELECT uid FROM photos)",
+            [],
+        )?;
        tx.commit()?;
        Ok(removed)
    }
@@ -455,7 +496,8 @@ impl Db {
    /// restricts the page to one tab (Photos / Videos / Raw); `range`, when set,
    /// restricts it to a `[from, to)` capture-time window (epoch seconds) — the
    /// date scrubber's jump. `offset` is relative to whatever the filters leave.
-    /// `favorites` restricts the page to favourited photos.
+    /// `favorites` restricts the page to favorited photos, and `not_in_album`
+    /// to the shots no album holds any file of.
    ///
    /// The page holds one row per *group*: the RAW and the JPEG of one shot are
    /// one tile. The Raw tab is the exception and lists every raw file, because
@@ -467,6 +509,7 @@ impl Db {
        kind: Option<crate::control::PhotoKind>,
        range: Option<(i64, i64)>,
        favorites: bool,
+        not_in_album: bool,
    ) -> Result<Vec<StoredPhoto>> {
        let conn = self.read();
        // Built up so any combination of the optional filters is one indexed
@@ -490,6 +533,15 @@ impl Db {
        if favorites {
            conds.push("p.favorite = 1".to_string());
        }
+        // By group, not by file: a shot filed as its JPEG is filed, even though
+        // its RAW was never added anywhere.
+        if not_in_album {
+            conds.push(
+                "NOT EXISTS (SELECT 1 FROM album_photos a JOIN photos m ON m.uid = a.uid \
+                 WHERE COALESCE(m.group_key, m.uid) = COALESCE(p.group_key, p.uid))"
+                    .to_string(),
+            );
+        }
        if !conds.is_empty() {
            sql.push_str(" WHERE ");
            sql.push_str(&conds.join(" AND "));
@@ -577,6 +629,256 @@ impl Db {
        Ok(rows)
    }

+    /// Photos taken on `today`'s calendar day in earlier years, newest first —
+    /// the "On this day" strip. `today` is epoch seconds: its local month and day
+    /// pick the date, and its own year is left out, because today's photos are
+    /// what the timeline already opens on. One row per group, like the timeline.
+    pub fn photos_on_this_day(&self, today: i64, limit: usize) -> Result<Vec<StoredPhoto>> {
+        let conn = self.read();
+        let sql = format!(
+            "{PHOTO_SELECT} WHERE p.uid = COALESCE(p.group_key, p.uid) \
+             AND strftime('%m-%d', p.capture_time, 'unixepoch', 'localtime') \
+                 = strftime('%m-%d', ?1, 'unixepoch', 'localtime') \
+             AND strftime('%Y', p.capture_time, 'unixepoch', 'localtime') \
+                 < strftime('%Y', ?1, 'unixepoch', 'localtime') \
+             ORDER BY p.seq LIMIT ?2"
+        );
+        let mut stmt = conn.prepare(&sql)?;
+        let rows = stmt
+            .query_map(params![today, limit as i64], stored_photo)?
+            .collect::<rusqlite::Result<_>>()?;
+        Ok(rows)
+    }
+
+    /// Every town photos were taken in, with how many and the newest one as its
+    /// cover, most photographed first. Counted per group, like the timeline;
+    /// photos without a location, or taken far from any town, are in none.
+    pub fn photo_places(&self) -> Result<Vec<StoredPlace>> {
+        let rows: Vec<(u32, usize, String)> = {
+            let conn = self.read();
+            // SQLite fills the bare `uid` from the row `MIN(seq)` picked, which
+            // is the newest photo of the place.
+            let mut stmt = conn.prepare(
+                "SELECT place_id, COUNT(*), uid, MIN(seq) FROM photos \
+                 WHERE uid = COALESCE(group_key, uid) AND place_id IS NOT NULL \
+                 GROUP BY place_id ORDER BY COUNT(*) DESC, MIN(seq)",
+            )?;
+            stmt.query_map([], |r| {
+                Ok((r.get(0)?, r.get::<_, i64>(1)? as usize, r.get(2)?))
+            })?
+            .collect::<rusqlite::Result<_>>()?
+        };
+        let uids: Vec<String> = rows.iter().map(|(_, _, uid)| uid.clone()).collect();
+        let mut covers: HashMap<String, StoredPhoto> = self
+            .photos_by_uid(&uids)?
+            .into_iter()
+            .map(|photo| (photo.uid.clone(), photo))
+            .collect();
+        Ok(rows
+            .into_iter()
+            .filter_map(|(id, count, uid)| {
+                Some(StoredPlace {
+                    id,
+                    count,
+                    cover: covers.remove(&uid)?,
+                })
+            })
+            .collect())
+    }
+
+    /// One page of the photos taken in a town, newest first, one per group.
+    pub fn photos_at_place(
+        &self,
+        id: u32,
+        offset: usize,
+        limit: usize,
+    ) -> Result<Vec<StoredPhoto>> {
+        let conn = self.read();
+        let sql = format!(
+            "{PHOTO_SELECT} WHERE p.uid = COALESCE(p.group_key, p.uid) AND p.place_id = ?1 \
+             ORDER BY p.seq LIMIT ?2 OFFSET ?3"
+        );
+        let mut stmt = conn.prepare(&sql)?;
+        let rows = stmt
+            .query_map(params![id, limit as i64, offset as i64], stored_photo)?
+            .collect::<rusqlite::Result<_>>()?;
+        Ok(rows)
+    }
+
+    /// Every photo taken in a town, one per group as in [`Self::photos_at_place`],
+    /// with where exactly it was taken. A group's own location is that of the
+    /// photo standing for it.
+    pub fn photo_locations_at_place(&self, id: u32) -> Result<Vec<(StoredPhoto, (f64, f64))>> {
+        let photos = self.photos_at_place(id, 0, usize::MAX >> 1)?;
+        let located: HashMap<String, (f64, f64)> = {
+            let conn = self.read();
+            let mut stmt = conn.prepare(
+                "SELECT uid, latitude, longitude FROM photos \
+                 WHERE place_id = ?1 AND latitude IS NOT NULL AND longitude IS NOT NULL",
+            )?;
+            stmt.query_map(params![id], |r| Ok((r.get(0)?, (r.get(1)?, r.get(2)?))))?
+                .collect::<rusqlite::Result<_>>()?
+        };
+        Ok(photos
+            .into_iter()
+            .filter_map(|photo| {
+                let at = *located.get(&photo.uid)?;
+                Some((photo, at))
+            })
+            .collect())
+    }
+
+    /// Sets of photos with the same content hash, each set ordered with the
+    /// copy worth keeping first, and the sets newest first.
+    ///
+    /// The copy to keep is the one in the most albums, then the one that is part
+    /// of a larger group (the JPEG's RAW is filed with it, a stray re-upload is
+    /// not), then the earliest in server order. At most one file per group is
+    /// listed: the files of one RAW+JPEG shot are not copies of each other, and a
+    /// set left with one member is no set.
+    pub fn photo_duplicates(&self) -> Result<Vec<Vec<StoredPhoto>>> {
+        let rows: Vec<(String, String, String)> = {
+            let conn = self.read();
+            let mut stmt = conn.prepare(
+                "SELECT p.uid, p.content_hash, COALESCE(p.group_key, p.uid) AS k FROM photos p \
+                 WHERE p.content_hash IN (SELECT content_hash FROM photos \
+                     WHERE content_hash IS NOT NULL GROUP BY content_hash HAVING COUNT(*) > 1) \
+                 ORDER BY p.content_hash, \
+                     (SELECT COUNT(*) FROM album_photos a WHERE a.uid = p.uid) DESC, \
+                     (SELECT COUNT(*) FROM photos m WHERE COALESCE(m.group_key, m.uid) = COALESCE(p.group_key, p.uid)) DESC, \
+                     p.seq",
+            )?;
+            stmt.query_map([], |r| Ok((r.get(0)?, r.get(1)?, r.get(2)?)))?
+                .collect::<rusqlite::Result<_>>()?
+        };
+        let uids: Vec<String> = rows.iter().map(|(uid, _, _)| uid.clone()).collect();
+        let mut stored: HashMap<String, StoredPhoto> = self
+            .photos_by_uid(&uids)?
+            .into_iter()
+            .map(|photo| (photo.uid.clone(), photo))
+            .collect();
+
+        let mut sets: Vec<Vec<StoredPhoto>> = Vec::new();
+        let mut hash_of_set: Option<&str> = None;
+        let mut groups_in_set: HashSet<&str> = HashSet::new();
+        for (uid, hash, group) in &rows {
+            if hash_of_set != Some(hash.as_str()) {
+                hash_of_set = Some(hash);
+                groups_in_set.clear();
+                sets.push(Vec::new());
+            }
+            if !groups_in_set.insert(group) {
+                continue;
+            }
+            if let (Some(set), Some(photo)) = (sets.last_mut(), stored.remove(uid)) {
+                set.push(photo);
+            }
+        }
+        sets.retain(|set| set.len() > 1);
+        sets.sort_by_key(|set| std::cmp::Reverse(set.iter().map(|p| p.capture_time).max()));
+        Ok(sets)
+    }
+
+    /// Shots whose look hasn't been hashed yet, by the uid of the photo the
+    /// grid shows for each, newest first, at most `limit`. Videos, and photos
+    /// with no thumbnail to hash, are left out. A shot counts as hashed once
+    /// any of its files is, since they all show one picture.
+    pub fn photos_unhashed(&self, limit: usize) -> Result<Vec<StoredPhoto>> {
+        let uids: Vec<String> = {
+            let conn = self.read();
+            let mut stmt = conn.prepare(
+                "SELECT COALESCE(group_key, uid) AS k FROM photos \
+                 GROUP BY k \
+                 HAVING MAX(similar_hash) IS NULL \
+                    AND MAX(kind != ?1 AND thumb_state != ?2) \
+                 ORDER BY MAX(capture_time) DESC LIMIT ?3",
+            )?;
+            stmt.query_map(
+                params![
+                    crate::control::PhotoKind::Video.as_i64(),
+                    THUMB_NONE,
+                    limit as i64
+                ],
+                |r| r.get(0),
+            )?
+            .collect::<rusqlite::Result<_>>()?
+        };
+        self.photos_by_uid(&uids)
+    }
+
+    /// Record the look of photo `uid`: its difference hash, or
+    /// [`crate::similar::NO_HASH`] when its thumbnail gave none.
+    pub fn photo_set_similar_hash(&self, uid: &str, hash: u64) -> Result<()> {
+        let conn = self.conn.lock();
+        conn.execute(
+            "UPDATE photos SET similar_hash = ?2 WHERE uid = ?1",
+            params![uid, hash as i64],
+        )?;
+        Ok(())
+    }
+
+    /// How many shots have been hashed, out of how many could be.
+    pub fn similar_progress(&self) -> Result<(usize, usize)> {
+        let conn = self.read();
+        let (hashed, total): (i64, i64) = conn.query_row(
+            "SELECT COUNT(*) FILTER (WHERE hashed), COUNT(*) FROM \
+               (SELECT MAX(similar_hash) IS NOT NULL AS hashed FROM photos \
+                GROUP BY COALESCE(group_key, uid) \
+                HAVING MAX(similar_hash) IS NOT NULL \
+                    OR MAX(kind != ?1 AND thumb_state != ?2))",
+            params![crate::control::PhotoKind::Video.as_i64(), THUMB_NONE],
+            |r| Ok((r.get(0)?, r.get(1)?)),
+        )?;
+        Ok((hashed.max(0) as usize, total.max(0) as usize))
+    }
+
+    /// Sets of shots that look alike (see [`crate::similar`]), one photo per
+    /// shot in capture order, and the sets newest first. A set whose photos
+    /// are all byte-identical copies is left to [`Self::photo_duplicates`].
+    pub fn photo_similar(&self) -> Result<Vec<Vec<StoredPhoto>>> {
+        let rows: Vec<(String, u64, Option<String>)> = {
+            let conn = self.read();
+            let mut stmt = conn.prepare(
+                "SELECT COALESCE(group_key, uid) AS k, MAX(similar_hash), \
+                        MAX(content_hash) FILTER (WHERE uid = COALESCE(group_key, uid)) \
+                 FROM photos GROUP BY k \
+                 HAVING MAX(similar_hash) IS NOT NULL AND MAX(similar_hash) != ?1",
+            )?;
+            stmt.query_map(params![crate::similar::NO_HASH as i64], |r| {
+                Ok((r.get(0)?, r.get::<_, i64>(1)? as u64, r.get(2)?))
+            })?
+            .collect::<rusqlite::Result<_>>()?
+        };
+        let hashes: Vec<u64> = rows.iter().map(|(_, hash, _)| *hash).collect();
+        let found: Vec<Vec<usize>> = crate::similar::sets(&hashes)
+            .into_iter()
+            .filter(|set| {
+                let first = &rows[set[0]].2;
+                first.is_none() || set.iter().any(|&i| rows[i].2 != *first)
+            })
+            .collect();
+        let uids: Vec<String> = found.iter().flatten().map(|&i| rows[i].0.clone()).collect();
+        let mut stored: HashMap<String, StoredPhoto> = self
+            .photos_by_uid(&uids)?
+            .into_iter()
+            .map(|photo| (photo.uid.clone(), photo))
+            .collect();
+        let mut sets: Vec<Vec<StoredPhoto>> = found
+            .iter()
+            .map(|set| {
+                let mut photos: Vec<StoredPhoto> = set
+                    .iter()
+                    .filter_map(|&i| stored.remove(&rows[i].0))
+                    .collect();
+                photos.sort_by_key(|p| p.capture_time);
+                photos
+            })
+            .filter(|set| set.len() > 1)
+            .collect();
+        sets.sort_by_key(|set| std::cmp::Reverse(set.iter().map(|p| p.capture_time).max()));
+        Ok(sets)
+    }
+
    /// Per-tab counts for the Photos page subtitle: `(photos, videos, raw)`.
    pub fn photos_counts(&self) -> Result<(usize, usize, usize)> {
        use crate::control::PhotoKind;
@@ -620,7 +922,7 @@ impl Db {
        Ok(photos)
    }

-    /// Record a photo's favourite flag locally, after the server accepted the
+    /// Record a photo's favorite flag locally, after the server accepted the
    /// change. A uid the timeline does not hold is a no-op — an album photo on
    /// someone else's volume is never in our own `photos` table.
    pub fn photos_set_favorite(&self, uid: &str, favorite: bool) -> Result<()> {
@@ -98,7 +98,7 @@ impl Db {
    pub fn effective_node_access(&self, uid: &NodeUid) -> Result<Option<Access>> {
        let conn = self.read();
        let exists: bool = conn.query_row(
-            "SELECT EXISTS(SELECT 1 FROM nodes WHERE uid = ?1)",
+            "SELECT EXISTS(SELECT 1 FROM nodes WHERE uid = ?1 AND node_json IS NOT NULL)",
            [uid.to_string()],
            |row| row.get(0),
        )?;
@@ -260,6 +260,88 @@ impl Db {
        Ok(())
    }

+    /// Drop the baseline rows of `rel_path` and everything under it.
+    ///
+    /// Used when a subtree leaves a mirror folder through a move on Drive: its
+    /// local copy is about to be removed, and rows left behind would read as
+    /// "deleted locally" and trash the moved nodes at their new place.
+    pub fn sync_entries_remove_subtree(&self, folder_id: i64, rel_path: &str) -> Result<()> {
+        let conn = self.conn.lock();
+        conn.execute(
+            "DELETE FROM sync_entry
+              WHERE folder_id = ?1
+                AND (rel_path = ?2 OR substr(rel_path, 1, length(?2) + 1) = ?2 || '/')",
+            params![folder_id, rel_path],
+        )?;
+        Ok(())
+    }
+
+    /// Move the baseline rows of `from_rel` and everything under it to `to_rel`
+    /// in folder `to_folder`, in one transaction.
+    ///
+    /// Used when a move on Drive took a mirror subtree along with its local
+    /// copy: the rows still describe both sides correctly, only under a new
+    /// path, so the next pass on either folder has nothing to do. The two
+    /// folders may be the same one.
+    pub fn sync_entries_move(
+        &self,
+        from_folder: i64,
+        from_rel: &str,
+        to_folder: i64,
+        to_rel: &str,
+    ) -> Result<()> {
+        let mut conn = self.conn.lock();
+        let tx = conn.transaction()?;
+        {
+            let mut select = tx.prepare(
+                "SELECT rel_path, remote_uid, local_mtime, local_size, remote_rev, remote_hash,
+                        local_mtime_ns
+                   FROM sync_entry
+                  WHERE folder_id = ?1
+                    AND (rel_path = ?2 OR substr(rel_path, 1, length(?2) + 1) = ?2 || '/')",
+            )?;
+            let rows = select
+                .query_map(params![from_folder, from_rel], |r| {
+                    Ok(StoredSyncEntry {
+                        rel_path: r.get(0)?,
+                        remote_uid: r.get(1)?,
+                        local_mtime: r.get(2)?,
+                        local_size: r.get(3)?,
+                        remote_rev: r.get(4)?,
+                        remote_hash: r.get(5)?,
+                        local_mtime_ns: r.get(6)?,
+                    })
+                })?
+                .collect::<rusqlite::Result<Vec<_>>>()?;
+            let mut delete =
+                tx.prepare("DELETE FROM sync_entry WHERE folder_id = ?1 AND rel_path = ?2")?;
+            for row in &rows {
+                delete.execute(params![from_folder, row.rel_path])?;
+            }
+            let mut insert = tx.prepare(
+                "INSERT OR REPLACE INTO sync_entry
+                   (folder_id, rel_path, remote_uid, local_mtime, local_size, remote_rev,
+                    remote_hash, local_mtime_ns)
+                 VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)",
+            )?;
+            for row in rows {
+                let rel = format!("{to_rel}{}", &row.rel_path[from_rel.len()..]);
+                insert.execute(params![
+                    to_folder,
+                    rel,
+                    row.remote_uid,
+                    row.local_mtime,
+                    row.local_size,
+                    row.remote_rev,
+                    row.remote_hash,
+                    row.local_mtime_ns,
+                ])?;
+            }
+        }
+        tx.commit()?;
+        Ok(())
+    }
+
    /// Drop the entire baseline for a folder. Used when flipping ondemand→mirror:
    /// the local tree was evicted, so the old baseline is stale and would make the
    /// next reconcile mistake "locally deleted" for "must re-download". Clearing it
@@ -1,5 +1,7 @@
 //! Trashed nodes, persisted so the trash view opens without a round-trip.

+use std::collections::HashMap;
+
 use rusqlite::params;

 use super::Db;
@@ -15,6 +17,9 @@ pub struct StoredTrash {
    /// row written before schema v29, and for a node whose parent the server
    /// did not report.
    pub parent_uid: Option<String>,
+    /// When the daemon first saw the node in the trash, epoch seconds. `None`
+    /// when it cannot say (see schema v35).
+    pub trashed_at: Option<i64>,
 }

 impl Db {
@@ -24,8 +29,8 @@ impl Db {
        tx.execute("DELETE FROM trash", [])?;
        {
            let mut stmt = tx.prepare(
-                "INSERT INTO trash (uid, name, is_dir, size, mtime, parent_uid) \
-                 VALUES (?1, ?2, ?3, ?4, ?5, ?6)",
+                "INSERT INTO trash (uid, name, is_dir, size, mtime, parent_uid, trashed_at) \
+                 VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)",
            )?;
            for item in items {
                stmt.execute(params![
@@ -34,7 +39,8 @@ impl Db {
                    item.is_dir as i64,
                    item.size,
                    item.mtime,
-                    item.parent_uid
+                    item.parent_uid,
+                    item.trashed_at
                ])?;
            }
        }
@@ -47,7 +53,7 @@ impl Db {
    pub fn trash_list(&self) -> Result<Vec<StoredTrash>> {
        let conn = self.read();
        let mut stmt = conn.prepare(
-            "SELECT uid, name, is_dir, size, mtime, parent_uid FROM trash
+            "SELECT uid, name, is_dir, size, mtime, parent_uid, trashed_at FROM trash
             ORDER BY is_dir DESC, name COLLATE NOCASE",
        )?;
        let rows = stmt.query_map([], |r| {
@@ -58,6 +64,7 @@ impl Db {
                size: r.get(3)?,
                mtime: r.get(4)?,
                parent_uid: r.get(5)?,
+                trashed_at: r.get(6)?,
            })
        })?;
        let mut items = Vec::new();
@@ -81,5 +88,19 @@ impl Db {
        Ok(pairs)
    }

+    /// When each node now in the trash was first seen there, keyed by uid, so
+    /// a refresh can carry the times over into the listing it writes.
+    pub fn trash_seen(&self) -> Result<HashMap<String, Option<i64>>> {
+        let conn = self.read();
+        let mut stmt = conn.prepare("SELECT uid, trashed_at FROM trash")?;
+        let rows = stmt.query_map([], |r| Ok((r.get(0)?, r.get(1)?)))?;
+        let mut seen = HashMap::new();
+        for row in rows {
+            let (uid, at) = row?;
+            seen.insert(uid, at);
+        }
+        Ok(seen)
+    }
+
    // ---- device sync (devices.md) -----------------------------------------
 }
@@ -66,6 +66,20 @@ impl Error {
    }
 }

+impl Error {
+    /// Whether a control-socket round-trip gave up waiting for the reply: the
+    /// daemon is running but stuck, as opposed to not running at all.
+    pub fn is_timeout(&self) -> bool {
+        matches!(
+            self,
+            Error::Io(e) if matches!(
+                e.kind(),
+                std::io::ErrorKind::WouldBlock | std::io::ErrorKind::TimedOut
+            )
+        )
+    }
+}
+
 pub type Result<T> = std::result::Result<T, Error>;

 /// A failure on its way to a front-end: prose for the user, plus the
@@ -14,13 +14,16 @@ pub mod localindex;
 pub mod menu;
 pub mod mounts;
 pub mod opener;
+pub mod places;
 pub mod profile;
 pub mod sdkcache;
 pub mod search;
 pub mod service;
 pub mod shell;
+pub mod similar;
 pub mod syncignore;
 pub mod takeout;
+pub mod tray;

 pub use access::{Access, access_for, perm_bits};
 pub use error::{CoreError, CoreResult, Error, Result};
@@ -110,6 +110,9 @@ pub struct MountSpec {
    /// Live device sync progress, absent when no pass is running.
    #[serde(default)]
    pub progress: Option<SyncProgress>,
+    /// A synced folder paused on its own. Live daemon state, not a stored column.
+    #[serde(default)]
+    pub paused: bool,
 }

 #[cfg(test)]
@@ -0,0 +1,185 @@
+//! Offline reverse geocoding: the town a photo was taken in, from its GPS
+//! position, without asking any service.
+//!
+//! The towns are GeoNames' `cities15000` dump (every place with more than
+//! 15,000 people), trimmed to id, name, position and country in
+//! `data/cities15000.tsv` by `scripts/geonames-cities.py`. The script drops the
+//! parts of a city, such as Kreuzberg or "Paris 15 Vaugirard", so that a photo
+//! lands in the town people would name. GeoNames publishes the dump under
+//! CC BY 4.0, which is why the About dialog credits it.
+//!
+//! `data/countries.tsv` maps each country code to its ISO 3166-1 English name,
+//! as the `iso-codes` project spells it, so a front end can translate it
+//! through that project's `iso_3166-1` gettext domain.
+
+use std::collections::HashMap;
+use std::sync::OnceLock;
+
+/// How far from the nearest town a photo may be and still count as taken
+/// there, in km. Farther out (at sea, in the wilderness) it has no place.
+pub const MAX_DISTANCE_KM: f64 = 50.0;
+
+/// Mean Earth radius in km, for the haversine distance.
+const EARTH_RADIUS_KM: f64 = 6371.0;
+
+const CITIES: &str = include_str!("../data/cities15000.tsv");
+const COUNTRIES: &str = include_str!("../data/countries.tsv");
+
+/// One town of the table.
+#[derive(Debug, Clone, PartialEq)]
+pub struct City {
+    /// The GeoNames id, stable across dumps.
+    pub id: u32,
+    pub name: &'static str,
+    pub latitude: f64,
+    pub longitude: f64,
+    /// ISO 3166-1 alpha-2 country code.
+    pub country: &'static str,
+}
+
+/// The towns, and an index of them by whole-degree cell.
+struct Table {
+    cities: Vec<City>,
+    cells: HashMap<(i32, i32), Vec<usize>>,
+}
+
+fn table() -> &'static Table {
+    static TABLE: OnceLock<Table> = OnceLock::new();
+    TABLE.get_or_init(|| {
+        let cities: Vec<City> = CITIES.lines().filter_map(parse_city).collect();
+        let mut cells: HashMap<(i32, i32), Vec<usize>> = HashMap::new();
+        for (index, city) in cities.iter().enumerate() {
+            cells
+                .entry(cell(city.latitude, city.longitude))
+                .or_default()
+                .push(index);
+        }
+        Table { cities, cells }
+    })
+}
+
+fn parse_city(line: &'static str) -> Option<City> {
+    let mut fields = line.split('\t');
+    Some(City {
+        id: fields.next()?.parse().ok()?,
+        name: fields.next()?,
+        latitude: fields.next()?.parse().ok()?,
+        longitude: fields.next()?.parse().ok()?,
+        country: fields.next()?,
+    })
+}
+
+fn cell(latitude: f64, longitude: f64) -> (i32, i32) {
+    (latitude.floor() as i32, longitude.floor() as i32)
+}
+
+/// Great-circle distance between two positions, in km.
+pub fn distance_km(a: (f64, f64), b: (f64, f64)) -> f64 {
+    let (lat1, lat2) = (a.0.to_radians(), b.0.to_radians());
+    let dlat = lat2 - lat1;
+    let dlon = (b.1 - a.1).to_radians();
+    let h = (dlat / 2.0).sin().powi(2) + lat1.cos() * lat2.cos() * (dlon / 2.0).sin().powi(2);
+    2.0 * EARTH_RADIUS_KM * h.sqrt().min(1.0).asin()
+}
+
+/// The town nearest to a position, if one lies within [`MAX_DISTANCE_KM`].
+pub fn nearest(latitude: f64, longitude: f64) -> Option<&'static City> {
+    if !latitude.is_finite() || !longitude.is_finite() {
+        return None;
+    }
+    let table = table();
+    // A degree of latitude is about 111 km everywhere; a degree of longitude
+    // shrinks towards the poles, so more cells are needed to cover the radius.
+    let lat_span = (MAX_DISTANCE_KM / 111.0).ceil() as i32;
+    let lon_span = {
+        let scale = latitude.to_radians().cos().abs().max(0.01);
+        ((MAX_DISTANCE_KM / (111.0 * scale)).ceil() as i32).min(180)
+    };
+    let (row, column) = cell(latitude, longitude);
+    let mut best: Option<(f64, &City)> = None;
+    for dlat in -lat_span..=lat_span {
+        for dlon in -lon_span..=lon_span {
+            // Longitude wraps at the antimeridian: -181 is 179.
+            let lon_cell = (column + dlon + 180).rem_euclid(360) - 180;
+            let Some(indices) = table.cells.get(&(row + dlat, lon_cell)) else {
+                continue;
+            };
+            for &index in indices {
+                let city = &table.cities[index];
+                let d = distance_km((latitude, longitude), (city.latitude, city.longitude));
+                if d <= MAX_DISTANCE_KM && best.is_none_or(|(bd, _)| d < bd) {
+                    best = Some((d, city));
+                }
+            }
+        }
+    }
+    best.map(|(_, city)| city)
+}
+
+/// The town with this GeoNames id.
+pub fn city(id: u32) -> Option<&'static City> {
+    let cities = &table().cities;
+    // The table is sorted by id.
+    cities
+        .binary_search_by_key(&id, |city| city.id)
+        .ok()
+        .map(|index| &cities[index])
+}
+
+/// The English ISO 3166-1 name of a country code, such as "Germany" for "DE".
+pub fn country_name(code: &str) -> Option<&'static str> {
+    COUNTRIES.lines().find_map(|line| {
+        let (c, name) = line.split_once('\t')?;
+        (c == code).then_some(name)
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn a_position_in_a_town_resolves_to_that_town() {
+        let berlin = nearest(52.52, 13.405).expect("Berlin is a town");
+        assert_eq!(berlin.name, "Berlin");
+        assert_eq!(berlin.country, "DE");
+        assert_eq!(city(berlin.id), Some(berlin));
+    }
+
+    #[test]
+    fn the_open_sea_has_no_town() {
+        assert_eq!(nearest(0.0, -30.0), None);
+        assert_eq!(nearest(f64::NAN, 0.0), None);
+    }
+
+    #[test]
+    fn a_town_across_the_antimeridian_is_still_found() {
+        // Just east of 180°, the nearest towns in Fiji are west of it.
+        let town = nearest(-16.8, 179.99);
+        assert!(town.is_none_or(|t| t.country == "FJ"));
+        let suva = nearest(-18.14, 178.44).expect("Suva is a town");
+        assert_eq!(suva.country, "FJ");
+    }
+
+    #[test]
+    fn every_town_has_a_named_country() {
+        for city in &table().cities {
+            assert!(
+                country_name(city.country).is_some(),
+                "{} has no country name for {}",
+                city.name,
+                city.country
+            );
+        }
+        assert_eq!(country_name("DE"), Some("Germany"));
+    }
+
+    #[test]
+    fn distances_are_great_circle_km() {
+        let d = distance_km((52.52, 13.405), (48.137, 11.575));
+        assert!(
+            (d - 504.0).abs() < 5.0,
+            "Berlin to Munich is about 504 km, got {d}"
+        );
+    }
+}
@@ -55,9 +55,10 @@ fn systemctl_query(args: &[&str]) -> bool {
 /// keyring checks). `--now` is a no-op on an active unit, so the daemon would
 /// keep sleeping and the mount would not appear until the next poll fired.
 /// Restarting makes the new session take effect immediately, and starts the
-/// unit when it is not running at all.
+/// unit when it is not running at all. `reenable` for the reason given on
+/// [`enable`].
 pub fn enable_start() -> bool {
-    let enabled = systemctl(&["enable"]);
+    let enabled = systemctl(&["reenable"]);
    systemctl(&["restart"]) && enabled
 }

@@ -97,8 +98,14 @@ pub fn is_enabled() -> bool {
 /// Enable the service so it auto-starts on future logins, without necessarily
 /// starting it now beyond what `enable` does. Used by the Settings "Start on
 /// login" switch; pairs with [`disable`](disable).
+///
+/// `reenable` rather than `enable`: older installs were enabled
+/// into `default.target.wants`, and a plain `enable` would add the new
+/// `graphical-session.target.wants` link while leaving the old one to start the
+/// unit too early. `reenable` drops every existing link and recreates them from
+/// the current `[Install]` section.
 pub fn enable() -> bool {
-    systemctl(&["enable"])
+    systemctl(&["reenable"])
 }

 /// Disable auto-start without stopping the running mount. Used by the Settings
@@ -0,0 +1,193 @@
+//! Telling photos apart by what they show rather than by their bytes.
+//!
+//! The server's content hash only matches byte-identical files. A photo that
+//! was resized, re-encoded or sent through a messenger is another file, so the
+//! similar-photo finder hashes each thumbnail instead: a 64-bit difference
+//! hash ("dHash"), which compares neighbouring brightness in a 9×8 grid. Two
+//! copies of one picture land a few bits apart, and different pictures about
+//! half of the bits apart.
+
+/// Hashes this many bits apart or fewer show the same picture.
+pub const SIMILAR_BITS: u32 = 6;
+
+/// Stored for a photo whose thumbnail was looked at and gave no usable hash
+/// (it couldn't be decoded, or is one flat colour), so it isn't looked at
+/// again. A real hash is never 0: a picture that would hash to 0 has no
+/// brightness changes, which [`difference_hash`] turns down as flat.
+pub const NO_HASH: u64 = 0;
+
+/// Samples of the grid that differ by less than this in brightness, all of
+/// them, make a flat picture — a black frame, a blank page — whose hash is
+/// noise and would match every other flat picture.
+const FLAT: u8 = 8;
+
+/// The difference hash of an 8-bit greyscale image `width` px wide, rows
+/// stored one after another in `luma`. `None` for an empty or flat image.
+pub fn difference_hash(width: usize, height: usize, luma: &[u8]) -> Option<u64> {
+    if width == 0 || height == 0 || luma.len() < width * height {
+        return None;
+    }
+    // Box-average down to 9×8, so every source pixel counts once and the hash
+    // doesn't depend on which pixels a nearest-neighbour pick happens to hit.
+    let mut grid = [[0u8; 9]; 8];
+    for (gy, row) in grid.iter_mut().enumerate() {
+        let (y0, y1) = span(gy, 8, height);
+        for (gx, cell) in row.iter_mut().enumerate() {
+            let (x0, x1) = span(gx, 9, width);
+            let mut sum = 0u64;
+            for y in y0..y1 {
+                sum += luma[y * width + x0..y * width + x1]
+                    .iter()
+                    .map(|&v| u64::from(v))
+                    .sum::<u64>();
+            }
+            *cell = (sum / ((y1 - y0) * (x1 - x0)) as u64) as u8;
+        }
+    }
+    let (min, max) = grid
+        .iter()
+        .flatten()
+        .fold((u8::MAX, 0), |(min, max), &v| (min.min(v), max.max(v)));
+    if max - min < FLAT {
+        return None;
+    }
+    let mut hash = 0u64;
+    for row in &grid {
+        for pair in row.windows(2) {
+            hash = hash << 1 | u64::from(pair[0] < pair[1]);
+        }
+    }
+    (hash != NO_HASH).then_some(hash)
+}
+
+/// The source pixels `from..to` that cell `i` of `cells` covers along an edge
+/// of `len` px; never empty, even for an edge shorter than the grid.
+fn span(i: usize, cells: usize, len: usize) -> (usize, usize) {
+    let from = (i * len / cells).min(len - 1);
+    let to = ((i + 1) * len / cells).max(from + 1);
+    (from, to)
+}
+
+/// Whether two hashes show the same picture.
+pub fn alike(a: u64, b: u64) -> bool {
+    (a ^ b).count_ones() <= SIMILAR_BITS
+}
+
+/// Group `hashes` into sets of alike ones, by index, each set in index order
+/// and the sets by their first index. A hash alike to none other is in no
+/// set. Alike is taken as catching: a burst of shots each a little different
+/// from the last is one set.
+pub fn sets(hashes: &[u64]) -> Vec<Vec<usize>> {
+    // Two hashes at most SIMILAR_BITS apart agree on at least one of their
+    // eight bytes, as long as SIMILAR_BITS < 8. So only hashes sharing some
+    // byte are compared, not every pair of the library.
+    const _: () = assert!(SIMILAR_BITS < 8);
+    let mut parent: Vec<usize> = (0..hashes.len()).collect();
+    fn root(parent: &mut [usize], mut i: usize) -> usize {
+        while parent[i] != i {
+            parent[i] = parent[parent[i]];
+            i = parent[i];
+        }
+        i
+    }
+    for byte in 0..8 {
+        let mut buckets: Vec<Vec<usize>> = vec![Vec::new(); 256];
+        for (i, &hash) in hashes.iter().enumerate() {
+            buckets[(hash >> (byte * 8)) as u8 as usize].push(i);
+        }
+        for bucket in &buckets {
+            for (n, &a) in bucket.iter().enumerate() {
+                for &b in &bucket[n + 1..] {
+                    if alike(hashes[a], hashes[b]) {
+                        let (ra, rb) = (root(&mut parent, a), root(&mut parent, b));
+                        if ra != rb {
+                            parent[ra.max(rb)] = ra.min(rb);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    let mut by_root: std::collections::BTreeMap<usize, Vec<usize>> = Default::default();
+    for i in 0..hashes.len() {
+        let r = root(&mut parent, i);
+        by_root.entry(r).or_default().push(i);
+    }
+    by_root.into_values().filter(|set| set.len() > 1).collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /// A 90×80 picture: a bright disc on a gradient.
+    fn picture(width: usize, height: usize) -> Vec<u8> {
+        let mut luma = Vec::with_capacity(width * height);
+        for y in 0..height {
+            for x in 0..width {
+                let (fx, fy) = (x as f64 / width as f64, y as f64 / height as f64);
+                let disc = ((fx - 0.3).powi(2) + (fy - 0.6).powi(2)).sqrt() < 0.2;
+                let v = if disc { 240.0 } else { 40.0 + 120.0 * fx * fy };
+                luma.push(v as u8);
+            }
+        }
+        luma
+    }
+
+    #[test]
+    fn a_resized_copy_hashes_alike() {
+        let big = difference_hash(900, 800, &picture(900, 800)).unwrap();
+        let small = difference_hash(91, 79, &picture(91, 79)).unwrap();
+        assert!(
+            alike(big, small),
+            "{} bits apart",
+            (big ^ small).count_ones()
+        );
+    }
+
+    #[test]
+    fn a_different_picture_hashes_apart() {
+        let one = difference_hash(90, 80, &picture(90, 80)).unwrap();
+        let mirrored: Vec<u8> = picture(90, 80)
+            .chunks(90)
+            .flat_map(|row| row.iter().rev().copied().collect::<Vec<_>>())
+            .collect();
+        let other = difference_hash(90, 80, &mirrored).unwrap();
+        assert!(!alike(one, other));
+    }
+
+    #[test]
+    fn a_flat_picture_has_no_hash() {
+        assert_eq!(difference_hash(64, 64, &[17; 64 * 64]), None);
+        assert_eq!(difference_hash(0, 0, &[]), None);
+        assert_eq!(difference_hash(4, 4, &[0; 3]), None);
+    }
+
+    #[test]
+    fn a_picture_smaller_than_the_grid_still_hashes() {
+        let luma: Vec<u8> = (0..4 * 3).map(|i| (i * 20) as u8).collect();
+        assert!(difference_hash(4, 3, &luma).is_some());
+    }
+
+    #[test]
+    fn alike_hashes_form_sets_and_catch_on() {
+        let a = 0x0123_4567_89ab_cdef_u64;
+        let hashes = [
+            a,
+            !a,
+            a ^ 0b111,
+            a ^ 0b111 ^ (0b1111 << 40),
+            0x5555_0000_ffff_aaaa,
+        ];
+        assert_eq!(sets(&hashes), vec![vec![0, 2, 3]]);
+    }
+
+    #[test]
+    fn hashes_apart_in_most_bytes_are_still_found() {
+        // One bit apart in each of six bytes: six bits in all, and only the
+        // top two bytes agree.
+        let a = 1u64 << 63;
+        let b = (0..6).fold(a, |h, byte| h | 1 << (byte * 8));
+        assert_eq!(sets(&[a, b]), vec![vec![0, 1]]);
+    }
+}
@@ -96,6 +96,26 @@ pub fn is_transient_name(name: &str) -> bool {
    false
 }

+/// Whether `name` is scratch another program writes and throws away: the
+/// [`is_transient_name`] set, plus the save-by-rename temporaries of GTK, Qt,
+/// Chromium and Electron, generic `.tmp` files and Emacs lock files. None of
+/// them is a file the user made, so a front-end can hide them from a history
+/// of what happened to the user's files.
+pub fn is_scratch_name(name: &str) -> bool {
+    if is_transient_name(name) {
+        return true;
+    }
+    let lower = name.to_ascii_lowercase();
+    lower.ends_with(".tmp")
+        || lower.ends_with(".temp")
+        || name.starts_with(".goutputstream-")
+        || name.starts_with(".org.chromium.")
+        || name.starts_with(".com.google.chrome.")
+        || name.starts_with(".#")
+        || (name.starts_with('#') && name.ends_with('#') && name.len() > 1)
+        || (name.starts_with('.') && name.contains(".tmp."))
+}
+
 /// Filenames accepted as a folder's ignore file, in precedence order.
 const IGNORE_FILE_NAMES: &[&str] = &[".pdfsignore", ".protonignore"];

@@ -341,6 +361,25 @@ mod tests {
        }
    }

+    #[test]
+    fn save_by_rename_temporaries_are_scratch() {
+        for name in [
+            ".goutputstream-4XK2B2",
+            ".org.chromium.Chromium.aBc123",
+            "~$report.docx",
+            ".~lock.budget.ods#",
+            ".#notes.org",
+            "#notes.org#",
+            "cache.tmp",
+            "page.html.crdownload",
+        ] {
+            assert!(is_scratch_name(name), "{name}");
+        }
+        for name in ["report.docx", "notes.org", "#1 hits.txt", ".bashrc"] {
+            assert!(!is_scratch_name(name), "{name}");
+        }
+    }
+
    #[test]
    fn finished_names_are_not_transient() {
        for name in [
@@ -812,7 +812,7 @@ mod tests {
    }

    #[test]
-    fn sidecar_supplies_capture_time_and_favourite() {
+    fn sidecar_supplies_capture_time_and_favorite() {
        let mut sidecars = HashMap::new();
        sidecar(
            &mut sidecars,
@@ -0,0 +1,20 @@
+//! Talking to a running `pdfs-tray`.
+//!
+//! The tray binds [`AppDirs::tray_socket`] to keep a single instance. The same
+//! socket takes one command, [`QUIT`], so the desktop app can take the icon
+//! away when the user hides it or stops Proton Drive.
+
+use std::io::Write;
+use std::os::unix::net::UnixStream;
+
+use crate::config::AppDirs;
+
+/// The line that asks the tray to exit.
+pub const QUIT: &str = "quit";
+
+/// Ask a running tray to exit. False when no tray answers.
+pub fn quit(dirs: &AppDirs) -> bool {
+    UnixStream::connect(dirs.tray_socket())
+        .and_then(|mut stream| stream.write_all(format!("{QUIT}\n").as_bytes()))
+        .is_ok()
+}
@@ -15,6 +15,7 @@ zip.workspace = true
 sha1.workspace = true
 proton-drive-rs.workspace = true
 futures.workspace = true
+async-trait.workspace = true
 tokio.workspace = true
 tracing.workspace = true
 fuser.workspace = true
@@ -24,3 +25,6 @@ base64.workspace = true
 image.workspace = true
 notify = "8"
 parking_lot.workspace = true
+
+[dev-dependencies]
+tracing-subscriber.workspace = true
@@ -15,7 +15,7 @@
 use std::collections::{HashMap, HashSet};
 use std::sync::atomic::Ordering;

-use pdfs_core::control::{AlbumInfo, PhotoItem};
+use pdfs_core::control::{AlbumInfo, PhotoItem, Topic};
 use pdfs_core::db::StoredAlbum;
 use pdfs_core::{CoreError, CoreResult};

@@ -137,10 +137,12 @@ impl Core {
        }
        let core = self.clone();
        self.rt.spawn(async move {
-            if let Err(e) = core.refresh_albums().await {
-                warn!(error = %e, "background album refresh failed");
-            }
+            let refreshed = core.refresh_albums().await;
            core.albums_refreshing.store(false, Ordering::SeqCst);
+            match refreshed {
+                Ok(_) => core.events.publish(&[Topic::Photos]),
+                Err(e) => warn!(error = %e, "background album refresh failed"),
+            }
        });
    }

@@ -175,6 +177,40 @@ impl Core {
        Ok(page.into_iter().map(|p| self.photo_item(p)).collect())
    }

+    /// Make sure every album of ours has its contents on disk, for a filter
+    /// that asks which photos no album holds. Contents are otherwise fetched
+    /// the first time an album is opened, so an album never opened would read
+    /// as empty and its photos as unfiled.
+    ///
+    /// Shared-with-me albums are skipped: their photos live on the sharer's
+    /// volume and are never in our timeline. The freshness stamps are no guide
+    /// here — any album change clears all of them — so only an album whose
+    /// server count disagrees with an empty local copy is waited for.
+    pub(crate) fn ensure_album_contents(&self) -> CoreResult<()> {
+        if self.db.albums_count().map_err(CoreError::from)? == 0
+            && !self.rt.block_on(self.refresh_albums())?
+        {
+            return Ok(());
+        }
+        let albums = self.db.albums_list().map_err(CoreError::from)?;
+        for album in albums.iter().filter(|a| !a.shared && a.photo_count > 0) {
+            let stored = self
+                .db
+                .album_photos_count(&album.uid)
+                .map_err(CoreError::from)?;
+            if stored > 0 {
+                continue;
+            }
+            let Some(uid) = parse_uid(&album.uid) else {
+                continue;
+            };
+            if let Err(error) = self.rt.block_on(self.refresh_album(&uid)) {
+                warn!(album = %album.uid, %error, "fetching an album's contents failed");
+            }
+        }
+        Ok(())
+    }
+
    /// Re-enumerate one album's photos and replace its persisted contents.
    pub(crate) async fn refresh_album(&self, album: &NodeUid) -> CoreResult<()> {
        let photos = self.photos();
@@ -221,6 +257,84 @@ impl Core {
        Ok(())
    }

+    /// Create an album and return its uid. The listing is refreshed before
+    /// answering, so the next [`Core::albums`] already shows it.
+    pub(crate) fn create_album(&self, name: &str) -> CoreResult<String> {
+        let uid = self
+            .rt
+            .block_on(self.photos().create_album(name))
+            .map_err(|e| CoreError::from_api(&e, "create album"))?;
+        self.after_album_change(None);
+        Ok(uid.to_string())
+    }
+
+    pub(crate) fn rename_album(&self, album: &NodeUid, name: &str) -> CoreResult<()> {
+        self.rt
+            .block_on(self.photos().rename_album(album, name))
+            .map_err(|e| CoreError::from_api(&e, "rename album"))?;
+        self.after_album_change(None);
+        Ok(())
+    }
+
+    /// Delete an album. Its photos stay in the timeline unless `delete_photos`,
+    /// which only matters for photos that exist in the album alone.
+    pub(crate) fn delete_album(&self, album: &NodeUid, delete_photos: bool) -> CoreResult<()> {
+        self.rt
+            .block_on(self.photos().delete_album(album, delete_photos))
+            .map_err(|e| CoreError::from_api(&e, "delete album"))?;
+        let key = album.to_string();
+        if let Err(error) = self.db.album_photos_replace(&key, &[]) {
+            warn!(%album, %error, "a deleted album's photos could not be dropped");
+        }
+        self.after_album_change(None);
+        Ok(())
+    }
+
+    /// Add photos to an album, per photo: `(added, failed)`.
+    pub(crate) fn add_to_album(
+        &self,
+        album: &NodeUid,
+        photos: &[NodeUid],
+    ) -> CoreResult<AlbumOutcome> {
+        let outcomes = self
+            .rt
+            .block_on(self.photos().add_photos_to_album(album, photos))
+            .map_err(|e| CoreError::from_api(&e, "add to album"))?;
+        self.after_album_change(Some(album));
+        Ok(album_outcome(outcomes))
+    }
+
+    /// Take photos out of an album, per photo: `(removed, failed)`. The photos
+    /// stay in the timeline.
+    pub(crate) fn remove_from_album(
+        &self,
+        album: &NodeUid,
+        photos: &[NodeUid],
+    ) -> CoreResult<AlbumOutcome> {
+        let outcomes = self
+            .rt
+            .block_on(self.photos().remove_photos_from_album(album, photos))
+            .map_err(|e| CoreError::from_api(&e, "remove from album"))?;
+        self.after_album_change(Some(album));
+        Ok(album_outcome(outcomes))
+    }
+
+    /// Bring the persisted listing, and `album`'s contents when given, up to
+    /// date after a change made here, so the reply is followed by a listing
+    /// that shows it. A failed refresh only leaves them stale: the change
+    /// itself went through.
+    fn after_album_change(&self, album: Option<&NodeUid>) {
+        self.invalidate_albums();
+        if let Err(error) = self.rt.block_on(self.refresh_albums()) {
+            warn!(%error, "album listing refresh after a change failed");
+        }
+        if let Some(album) = album
+            && let Err(error) = self.rt.block_on(self.refresh_album(album))
+        {
+            warn!(%album, %error, "album refresh after a change failed");
+        }
+    }
+
    /// Drop the album listing's and every album's freshness stamp, so the next
    /// request re-enumerates. Paired with [`Core::invalidate_photos`] — a change
    /// to the timeline can just as easily be a change to an album.
@@ -230,6 +344,20 @@ impl Core {
    }
 }

+/// Photos an album change applied to, and the ones it failed for with why.
+pub(crate) type AlbumOutcome = (Vec<String>, Vec<(String, String)>);
+
+fn album_outcome(outcomes: Vec<pdfs_core::batch::Outcome>) -> AlbumOutcome {
+    let (done, failed) = pdfs_core::batch::split(outcomes);
+    (
+        done.iter().map(|uid| uid.to_string()).collect(),
+        failed
+            .into_iter()
+            .map(|(uid, error)| (uid.to_string(), error.to_string()))
+            .collect(),
+    )
+}
+
 /// Project a persisted album into the wire item a front-end paints.
 fn album_info(album: StoredAlbum) -> AlbumInfo {
    AlbumInfo {
@@ -9,7 +9,7 @@ use crate::shutdown::Shutdown;
 ///
 /// Returns whether this mount actually held the node, so the caller can evict
 /// its content blob once if *any* mount did.
-fn forget_and_notify(st: &mut State, notify: &mut NotifyBatch, uid: &NodeUid) -> bool {
+pub(crate) fn forget_and_notify(st: &mut State, notify: &mut NotifyBatch, uid: &NodeUid) -> bool {
    // Capture the inode before `forget` clears the uid mapping.
    let child = st.by_uid.get(uid).copied();
    let Some((parent, name)) = st.forget(uid) else {
@@ -97,15 +97,13 @@ fn event_serializes_shared_publication(event: &DriveEvent, own_volume: &VolumeId
 /// entry forces the next `lookup`/`readdir` to re-enumerate from the remote, so
 /// most events only need to invalidate listings rather than re-fetch eagerly.
 ///
-/// Applied to **every** mounted inode space, not just the primary one. This task
-/// is per-daemon while node state is per-mount, and a `DriveEvent` names a uid,
-/// not a mount — so a file trashed from another device has to be withdrawn from
-/// whichever of our sessions is showing it, which for anything under a sync
-/// folder is a [`Core::fork_state`] fork rather than `core.state`. Reaching for
-/// the primary state alone left forks serving a deleted file indefinitely, the
-/// read-side twin of `docs/BUGS.md` B74. Inode numbers are per-mount, so each
-/// mount must be notified through its **own** channel; that pairing is what
-/// [`Core::for_each_mount`] exists to preserve.
+/// Applied to the tree every mount shares, and told to **every** mounted
+/// session. A `DriveEvent` names a uid, not a mount, so a file trashed from
+/// another device has to be withdrawn from whichever of our sessions is showing
+/// it — which for anything under a sync folder is a [`Core::fork_state`] fork.
+/// Telling the primary session alone left forks serving a deleted file, the
+/// read-side twin of `docs/BUGS.md` B74. [`Core::for_each_mount`] sends what
+/// the kernel needs to hear to every session.
 fn apply_event(core: &Core, event: &DriveEvent, dirty: &mut DirtyParents) -> pdfs_core::Result<()> {
    let foreign_delete = is_foreign_node_delete(event, &core.primary_root_uid.volume_id);
    let serializes_shared_publication =
@@ -233,6 +231,48 @@ fn acknowledge_applied_event(
    Ok(id)
 }

+/// How many applied node-update ids [`RecentEvents`] remembers. Far more than a
+/// replay can reach back: one comes from a batch whose last event was not its
+/// newest, so it repeats at most what that batch held.
+const RECENT_EVENTS: usize = 4096;
+
+/// The node updates applied lately, by event id, so one that comes round again
+/// is skipped rather than applied twice.
+///
+/// The feed can deliver the same event twice in a batch, and a batch whose
+/// events come out of order leaves the cursor short of its newest event, so the
+/// next poll replays what lay past it. An update applied twice is not harmless:
+/// the first copy of our own change claims the echo [`Core::note_self_change`]
+/// recorded, and the second, unclaimed, reads as someone else's edit and evicts
+/// the bytes a partial write is about to gap-fill from (docs/BUGS.md B123).
+///
+/// Only node updates: a delete is idempotent, and a continuity loss names the
+/// cursor it lost, which is an id already applied.
+#[derive(Default)]
+struct RecentEvents {
+    ids: HashSet<DriveEventId>,
+    order: VecDeque<DriveEventId>,
+}
+
+impl RecentEvents {
+    /// Record `event` as applied, reporting whether it was already.
+    fn repeat(&mut self, event: &DriveEvent) -> bool {
+        let DriveEvent::NodeUpdated { id, .. } = event else {
+            return false;
+        };
+        if !self.ids.insert(id.clone()) {
+            return true;
+        }
+        self.order.push_back(id.clone());
+        if self.order.len() > RECENT_EVENTS
+            && let Some(old) = self.order.pop_front()
+        {
+            self.ids.remove(&old);
+        }
+        false
+    }
+}
+
 /// The folders one batch of events changed, collected so the listings are
 /// dropped once at the end of the batch rather than once per event.
 ///
@@ -320,10 +360,10 @@ fn flush_dirty_parents(core: &Core, dirty: &DirtyParents) {
 /// only on fatal error.
 ///
 /// Takes the whole `Core` rather than the primary mount's pieces: an event has
-/// to be applied to every mounted inode space, and the registry that enumerates
-/// them lives on the `Core` (see [`apply_event`]).
+/// to reach every mounted session, and the registry that enumerates them lives
+/// on the `Core` (see [`apply_event`]).
 pub(super) async fn run_event_sync(
-    client: ProtonDriveClient,
+    client: Arc<dyn DriveApi>,
    scope: DriveEventScopeId,
    core: Core,
 ) {
@@ -377,10 +417,12 @@ pub(super) async fn run_event_sync(
    };
    info!(?cursor, "event sync started");

+    let mut recent = RecentEvents::default();
    loop {
-        tokio::time::sleep(POLL_INTERVAL).await;
-        let events = match client.enumerate_events(&scope, cursor.as_ref()).await {
+        core.next_poll(POLL_INTERVAL).await;
+        let events = match link::bounded(client.enumerate_events(&scope, cursor.as_ref())).await {
            Ok(events) => events,
+            Err(e) if core.lost_link(&e, "poll events") => continue,
            Err(e) => {
                warn!(error = %e, "event poll failed; retrying after interval");
                continue;
@@ -396,6 +438,11 @@ pub(super) async fn run_event_sync(
        // did apply.
        let mut dirty = DirtyParents::default();
        for event in &events {
+            if recent.repeat(event) {
+                debug!(id = %event.id().as_str(), "skipping an event already applied");
+                cursor = Some(event.id().clone());
+                continue;
+            }
            // Converge the SDK's own caches (folder keys, entity cache) on the
            // server before applying the event to our tree. Without this, a node
            // re-keyed/moved by another client keeps a stale key in the SDK for
@@ -422,6 +469,10 @@ pub(super) async fn run_event_sync(
            cursor = Some(applied);
        }
        flush_dirty_parents(&core, &dirty);
+        // Another device changed the tree: whatever a front-end lists may have
+        // moved, including what is shared and what is in the trash.
+        core.events
+            .publish(&[Topic::Files, Topic::Trash, Topic::Shares, Topic::Conflicts]);
    }
 }

@@ -467,9 +518,10 @@ pub(super) async fn run_photos_event_sync(core: Core) {
    info!(?cursor, "photo event sync started");

    loop {
-        tokio::time::sleep(POLL_INTERVAL).await;
-        let events = match photos.enumerate_events(&scope, cursor.as_ref()).await {
+        core.next_poll(POLL_INTERVAL).await;
+        let events = match link::bounded(photos.enumerate_events(&scope, cursor.as_ref())).await {
            Ok(events) => events,
+            Err(error) if core.lost_link(&error, "poll photo events") => continue,
            Err(error) => {
                warn!(%error, "photo event poll failed; retrying after interval");
                continue;
@@ -479,6 +531,7 @@ pub(super) async fn run_photos_event_sync(core: Core) {
            continue;
        };
        apply_photo_events(&core, &events);
+        core.events.publish(&[Topic::Photos]);
        // One cursor write per batch, after the batch is applied: a crash in
        // between replays events whose effects are idempotent.
        if let Err(error) = core.db.set_state_str(PHOTOS_EVENT_CURSOR, head.as_str()) {
@@ -511,7 +564,7 @@ impl PhotoEventPlan {
 ///
 /// `is_echo` claims an event as this daemon's own write. The feed replays our
 /// writes back at us and a `NodeUpdated` carries no revision id, so without this
-/// every favourite the user toggles here would mark its own photo stale and buy
+/// every favorite the user toggles here would mark its own photo stale and buy
 /// a resolve of a node we just wrote.
 fn classify_photo_events(
    events: &[DriveEvent],
@@ -529,7 +582,7 @@ fn classify_photo_events(
                if *is_trashed {
                    plan.gone.push(node_uid.to_string());
                } else if !is_echo(node_uid) {
-                    // An untrash, a rename, a favourite toggled on the phone: the
+                    // An untrash, a rename, a favorite toggled on the phone: the
                    // event says which node changed but never what about it, so
                    // the uid is marked stale and the next refresh reads it.
                    plan.touched.push(node_uid.to_string());
@@ -710,6 +763,43 @@ mod tests {
        }
    }

+    #[test]
+    fn a_node_update_seen_again_is_skipped_but_other_events_are_not() {
+        let update = |id: &str| DriveEvent::NodeUpdated {
+            id: DriveEventId::from(id),
+            node_uid: uid("file"),
+            parent_node_uid: None,
+            is_trashed: false,
+            is_shared: false,
+        };
+        let mut recent = RecentEvents::default();
+        assert!(!recent.repeat(&update("e1")));
+        assert!(!recent.repeat(&update("e2")));
+        assert!(recent.repeat(&update("e1")), "a duplicate or replay");
+        let lost = DriveEvent::ContinuityLost {
+            id: DriveEventId::from("e2"),
+        };
+        assert!(!recent.repeat(&lost), "names the cursor, which was applied");
+    }
+
+    #[test]
+    fn recent_events_forget_the_oldest_past_their_bound() {
+        let update = |n: usize| DriveEvent::NodeUpdated {
+            id: DriveEventId::from(format!("e{n}")),
+            node_uid: uid("file"),
+            parent_node_uid: None,
+            is_trashed: false,
+            is_shared: false,
+        };
+        let mut recent = RecentEvents::default();
+        for n in 0..=RECENT_EVENTS {
+            assert!(!recent.repeat(&update(n)));
+        }
+        assert_eq!(recent.ids.len(), RECENT_EVENTS);
+        assert!(!recent.repeat(&update(0)), "the oldest was forgotten");
+        assert!(recent.repeat(&update(RECENT_EVENTS)));
+    }
+
    #[test]
    fn foreign_delete_invalidates_an_earlier_refresh_generation() {
        let own_volume = VolumeId::from("own");
@@ -974,7 +1064,7 @@ mod tests {
                },
                DriveEvent::NodeUpdated {
                    id: DriveEventId::from("e3"),
-                    node_uid: uid("favourited"),
+                    node_uid: uid("favorited"),
                    parent_node_uid: None,
                    is_trashed: false,
                    is_shared: false,
@@ -986,7 +1076,7 @@ mod tests {
            plan,
            PhotoEventPlan {
                gone: vec![uid("deleted").to_string(), uid("trashed").to_string()],
-                touched: vec![uid("favourited").to_string()],
+                touched: vec![uid("favorited").to_string()],
                full: false,
            }
        );
@@ -0,0 +1,179 @@
+//! Listing and resolving `(sync-conflict …)` copies for the user.
+//!
+//! The sweep ([`crate::sweep`]) removes copies it can prove identical and flags
+//! the rest once in the activity feed. That leaves divergent copies sitting in
+//! folders with nothing but a name to find them by. This module lists them with
+//! the file they are a copy of, and resolves one the way the user chooses:
+//!
+//! - **Keep the original**: trash the copy.
+//! - **Keep the copy**: trash the original, then give the copy its name.
+//! - **Keep both**: rename the copy to a name of the user's choosing.
+//!
+//! Every resolution goes through the Proton trash, never a delete, so a wrong
+//! choice is undone by restoring from Trash. Resolution refuses to touch a file
+//! that is open, being written, or still owed an upload, for the same reason the
+//! sweep does: the node is about to change under the decision.
+//!
+//! Copies under My Files are named by their mountpoint-relative path. Copies
+//! inside a synced folder are named by their absolute local path, so a resolve
+//! request routes to the on-demand mount that serves them. A copy inside a
+//! mirror folder is listed too, but it is a local file first: the sync engine
+//! owns it, so it is resolved by editing the folder, not through here.
+
+use super::*;
+use pdfs_core::control::{ConflictInfo, ConflictKeep};
+use sweep::conflict_base_name;
+
+impl Core {
+    /// Where the user finds a conflict copy: its mountpoint-relative path under
+    /// My Files, or its absolute local path inside a synced folder. `None` for a
+    /// node no location of this machine shows, such as one in another
+    /// computer's device tree.
+    ///
+    /// The sweep only flags what this can name, and the listing uses it too. A
+    /// flagged copy the listing cannot see reads as resolved in the activity
+    /// feed while it still sits in the folder (`docs/BUGS.md` B99).
+    pub(crate) fn conflict_path(&self, roots: &SearchRoots, uid: &NodeUid) -> Option<String> {
+        let uid = uid.to_string();
+        if let Ok(Some(path)) = self
+            .db
+            .path_relative_to(&self.primary_root_uid.to_string(), &uid)
+        {
+            return Some(path);
+        }
+        let drive_path = self.db.node_path(&uid).ok().flatten()?;
+        roots.resolve(&drive_path)
+    }
+
+    /// Every conflict copy this machine shows, with the file it is a copy of.
+    pub(crate) fn list_conflicts(&self) -> CoreResult<Vec<ConflictInfo>> {
+        let stored = self
+            .db
+            .load_all()
+            .map_err(|e| CoreError::internal(format!("listing conflicts: {e:?}")))?;
+        let nodes: Vec<Node> = stored
+            .into_iter()
+            .map(|stored| stored.node)
+            .filter(|node| !node.trashed && !node.is_folder() && self.is_own_or_virtual(&node.uid))
+            .collect();
+        let mut by_parent_name: HashMap<(Option<&NodeUid>, &str), &Node> = HashMap::new();
+        for node in &nodes {
+            by_parent_name.insert((node.parent_uid.as_ref(), node.name.as_str()), node);
+        }
+        let roots = self.search_roots();
+        let mut items = Vec::new();
+        for node in &nodes {
+            let Some(base) = conflict_base_name(&node.name) else {
+                continue;
+            };
+            let Some(path) = self.conflict_path(&roots, &node.uid) else {
+                continue;
+            };
+            let original = by_parent_name
+                .get(&(node.parent_uid.as_ref(), base.as_str()))
+                .copied();
+            items.push(ConflictInfo {
+                original_path: sibling_path(&path, &base),
+                original_exists: original.is_some(),
+                size: node_size(node),
+                modified: node.modification_time,
+                original_size: original.map(node_size),
+                original_modified: original.map(|o| o.modification_time),
+                identical: original.is_some_and(|o| {
+                    node_size(o) == node_size(node)
+                        && node_content_sha1(node)
+                            .is_some_and(|sha| node_content_sha1(o).as_deref() == Some(&sha))
+                }),
+                path,
+            });
+        }
+        items.sort_by(|a, b| a.path.cmp(&b.path));
+        Ok(items)
+    }
+
+    /// Resolve the conflict copy at mountpoint-relative `copy`. Returns a line
+    /// for the user saying what happened.
+    pub(crate) fn resolve_conflict(&self, copy: &Path, keep: &ConflictKeep) -> CoreResult<String> {
+        let copy_name = copy
+            .file_name()
+            .and_then(|n| n.to_str())
+            .ok_or_else(|| CoreError::invalid("the conflict copy has no file name"))?;
+        let base = conflict_base_name(copy_name)
+            .ok_or_else(|| CoreError::invalid(format!("{copy_name} is not a conflict copy")))?;
+        let original = copy.with_file_name(&base);
+        self.require_settled(copy)?;
+        let message = match keep {
+            ConflictKeep::Original => {
+                self.delete(copy)?;
+                self.log_activity(ActivityKind::Trash, copy_name, format!("kept {base}"), true);
+                format!("kept {base}; the copy is in Trash")
+            }
+            ConflictKeep::Copy => {
+                self.require_settled(&original)?;
+                self.delete(&original)?;
+                // The original is already in Trash. A failed rename leaves the
+                // copy under its conflict name, which loses nothing — say so
+                // rather than leave the user guessing where their file went.
+                self.rename(copy, &base).map_err(|e| {
+                    e.context(&format!(
+                        "{base} was moved to Trash, but the copy kept its conflict name"
+                    ))
+                })?;
+                self.log_activity(
+                    ActivityKind::Rename,
+                    &base,
+                    format!("kept the conflict copy {copy_name}"),
+                    true,
+                );
+                format!("kept the copy as {base}; the previous version is in Trash")
+            }
+            ConflictKeep::Both { name } => {
+                let name = name.trim();
+                if name == base || name == copy_name {
+                    return Err(CoreError::invalid("choose a name that no other file has"));
+                }
+                self.rename(copy, name)?;
+                self.log_activity(ActivityKind::Rename, name, format!("was {copy_name}"), true);
+                format!("kept both; the copy is now {name}")
+            }
+        };
+        Ok(message)
+    }
+
+    /// Refuse to resolve around a file that is open, being written, or still
+    /// owed an upload: the decision would be about content that is changing.
+    fn require_settled(&self, rel: &Path) -> CoreResult<()> {
+        let (_, uid) = self.resolve(rel)?;
+        let queued = self.db.has_any_op(&uid.to_string()).unwrap_or(true);
+        if queued || self.is_busy(&uid) {
+            return Err(CoreError::conflict(format!(
+                "{} is still being written or uploaded; try again once it has synced",
+                rel.display()
+            )));
+        }
+        self.conflict_notified.lock().remove(&uid);
+        Ok(())
+    }
+}
+
+/// The path of `name` next to the file at `path`.
+fn sibling_path(path: &str, name: &str) -> String {
+    match path.rsplit_once('/') {
+        Some((dir, _)) => format!("{dir}/{name}"),
+        None => name.to_string(),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn the_original_sits_next_to_its_copy() {
+        assert_eq!(
+            sibling_path("a/b/f (sync-conflict 1).txt", "f.txt"),
+            "a/b/f.txt"
+        );
+        assert_eq!(sibling_path("f (sync-conflict 1).txt", "f.txt"), "f.txt");
+    }
+}
@@ -17,8 +17,8 @@ use std::time::{Duration, Instant};

 use pdfs_core::config::AppDirs;
 use pdfs_core::control::{
-    ActivityKind, PhotoMonth, RefreshScope, Request as CtlRequest, Response as CtlResponse,
-    TransferDirection, TrashFailure,
+    ActivityKind, Event, HEARTBEAT, PhotoMonth, RefreshScope, Request as CtlRequest,
+    Response as CtlResponse, Topic, TransferDirection, TrashFailure,
 };
 use pdfs_core::{CoreError, CoreResult};
 use proton_drive_rs::proton_sdk::ids::NodeUid;
@@ -29,6 +29,26 @@ use super::{Core, count_noun, human_bytes, human_duration, parse_uid};

 const MAX_CONTROL_REQUEST_BYTES: u64 = 1024 * 1024;
 const CONTROL_READ_TIMEOUT: Duration = Duration::from_secs(10);
+/// Answer a [`CtlRequest::StopSharing`]: log it, and turn a partial removal
+/// into an error that names what is still shared.
+fn stop_sharing_reply(
+    core: &Core,
+    target: &str,
+    result: CoreResult<super::sharing::StopSharingOutcome>,
+) -> CtlResponse {
+    match result.map(|outcome| outcome.into_result()) {
+        Ok(Ok(message)) => {
+            core.log_activity(ActivityKind::Unshare, target, "stopped sharing", true);
+            CtlResponse::Ok { message }
+        }
+        Ok(Err(left)) => {
+            core.log_activity(ActivityKind::Unshare, target, &left, false);
+            CtlResponse::error(CoreError::remote(left))
+        }
+        Err(e) => CtlResponse::error(e),
+    }
+}
+
 /// A client that connects, sends a request and then never reads its reply used
 /// to park a handler thread forever in `write_all`; 64 of those exhaust
 /// [`MAX_CONTROL_HANDLERS`] permanently. Generous enough for the largest
@@ -46,6 +66,32 @@ const MAX_ROW_LIMIT: usize = 1000;
 fn clamp_limit(limit: usize) -> usize {
    limit.min(MAX_ROW_LIMIT)
 }
+/// Answer an album add or remove: parse the uids, run `change`, and report
+/// per photo.
+fn album_change(
+    uid: &str,
+    photos: &[String],
+    change: impl FnOnce(&NodeUid, &[NodeUid]) -> CoreResult<super::albums::AlbumOutcome>,
+) -> CtlResponse {
+    let Some(album) = parse_uid(uid) else {
+        return CtlResponse::error(CoreError::invalid(format!("bad album uid: {uid}")));
+    };
+    let photos = match Core::parse_uids(photos) {
+        Ok(photos) => photos,
+        Err(e) => return CtlResponse::error(e),
+    };
+    match change(&album, &photos) {
+        Ok((changed, failed)) => CtlResponse::AlbumChanged {
+            changed,
+            failed: failed
+                .into_iter()
+                .map(|(uid, message)| TrashFailure { uid, message })
+                .collect(),
+        },
+        Err(e) => CtlResponse::error(e),
+    }
+}
+
 static ACTIVE_CONTROL_HANDLERS: AtomicUsize = AtomicUsize::new(0);

 struct ControlHandlerPermit;
@@ -117,8 +163,8 @@ fn read_request_line(reader: &mut impl BufRead) -> std::io::Result<Option<String
 /// Turn a CLI-supplied path into the mount that owns it and the path relative
 /// to *that* mount's root.
 ///
-/// [`rel_to_mount`] is the older, primary-only reading, and it is what every
-/// mutating request still uses. It rejects anything outside the primary
+/// [`rel_to_mount`] is the older, primary-only reading, and it is what most
+/// requests still use. It rejects anything outside the primary
 /// mountpoint, which leaves a secondary on-demand mount — a synced folder
 /// switched out of mirror mode — with no way to be named at all: `pdfs ls` and
 /// `pdfs refresh` both answered "is not under the mountpoint", so a folder
@@ -139,6 +185,62 @@ fn route_to_mount(core: &Core, mountpoint: &Path, path: &str) -> CoreResult<(Cor
    rel_to_mount(mountpoint, path).map(|rel| (core.clone(), rel))
 }

+/// [`route_to_mount`] for a request that changes what it names: trash, rename,
+/// create a folder, resolve a conflict. Each has to run against the on-demand
+/// mount serving the path, and `pdfs rm ~/Downloads/x` answered "is not under
+/// the mountpoint" while `pdfs move` took the same path. The conflict listing
+/// names a copy in a synced folder by its absolute local path (`docs/BUGS.md`
+/// B99), so resolving one needs this too. A mirror folder has no mount to run
+/// against: a file there is an ordinary local file.
+fn route_change(core: &Core, mountpoint: &Path, path: &str) -> CoreResult<(Core, PathBuf)> {
+    let routed = route_to_mount(core, mountpoint, path).map_err(|e| {
+        let p = Path::new(path);
+        let mirrored = core
+            .db
+            .sync_folder_list()
+            .unwrap_or_default()
+            .iter()
+            .any(|folder| folder.mode == "mirror" && p.starts_with(&folder.local_path));
+        if mirrored {
+            CoreError::invalid(format!(
+                "{path} is in a mirrored folder; change the local file there instead"
+            ))
+        } else {
+            e
+        }
+    })?;
+    if routed
+        .1
+        .components()
+        .all(|component| matches!(component, Component::Normal(_) | Component::CurDir))
+    {
+        Ok(routed)
+    } else {
+        Err(CoreError::invalid(format!("{path} escapes the mountpoint")))
+    }
+}
+
+/// [`route_change`] for a request that trashes or renames the node it names.
+/// A mount's root is My files or a whole synced folder. An on-demand folder's
+/// root has a parent on Drive, so nothing further down would stop `pdfs rm
+/// ~/Downloads` from trashing the folder out from under its own mount.
+fn route_node(core: &Core, mountpoint: &Path, path: &str) -> CoreResult<(Core, PathBuf)> {
+    let routed = route_change(core, mountpoint, path)?;
+    if below_root(&routed.1) {
+        Ok(routed)
+    } else {
+        Err(CoreError::invalid(format!(
+            "{path} is the root of a synced location and cannot be changed"
+        )))
+    }
+}
+
+/// Whether a mount-relative path names something below the mount's root.
+fn below_root(rel: &Path) -> bool {
+    rel.components()
+        .any(|component| matches!(component, Component::Normal(_)))
+}
+
 /// Turn a CLI-supplied path into a mountpoint-relative path. An absolute path
 /// must live under `mountpoint`; a relative path is taken as already relative to
 /// the mount root.
@@ -208,6 +310,158 @@ impl Drop for RefreshGuard {
    }
 }

+/// The reply to [`CtlRequest::Status`], which subscriptions are also sent
+/// whenever it changes.
+pub(crate) fn status_response(core: &Core, username: &str, mountpoint: &Path) -> CtlResponse {
+    let pins = core.cache.list_pins();
+    let queued = core.db.pending_op_counts().unwrap_or_default();
+    // Read after the queue: the drain counts an upload as landing before it
+    // retires the op, so one of the two always has it (B119).
+    let landing = core.landing_uploads.load(Ordering::SeqCst);
+    let staging = core.cache.staging_usage();
+    CtlResponse::Status {
+        parked_uploads: queued.parked.max(0) as u64,
+        failing_ops: queued.failing.max(0) as u64,
+        failing_error: queued.last_error.clone(),
+        staged_bytes: staging.bytes,
+        staged_oldest_secs: staging.oldest_secs,
+        paused: core.sync_pause().is_some(),
+        paused_until: core.sync_pause().flatten(),
+        username: username.to_string(),
+        mountpoint: mountpoint.display().to_string(),
+        pinned: pins.len(),
+        used: core.cache.usage(),
+        budget: core.cache.budget(),
+        pins,
+        online: core.online.load(Ordering::Relaxed),
+        pending_uploads: queued.uploads.max(0) as u64 + landing,
+        pending_changes: queued.changes.max(0) as u64,
+    }
+}
+
+/// What a front-end shows that `request` changes when it succeeds. Requests
+/// from the CLI publish the same way as the app's, so an open window follows
+/// a change made in a terminal.
+fn touched_topics(request: &CtlRequest) -> &'static [Topic] {
+    use CtlRequest as R;
+    match request {
+        R::Pin { .. } | R::Unpin { .. } => &[Topic::Files],
+        R::CreateAlbum { .. }
+        | R::RenameAlbum { .. }
+        | R::DeleteAlbum { .. }
+        | R::AddToAlbum { .. }
+        | R::RemoveFromAlbum { .. }
+        | R::SetPhotoFavorite { .. }
+        | R::UploadPhoto { .. } => &[Topic::Photos],
+        R::TrashNodes { .. } => &[Topic::Files, Topic::Photos, Topic::Trash, Topic::Conflicts],
+        R::Rename { .. } | R::Move { .. } | R::CreateFolder { .. } | R::UploadPaths { .. } => {
+            &[Topic::Files, Topic::Conflicts]
+        }
+        R::Delete { .. } => &[Topic::Files, Topic::Trash, Topic::Conflicts],
+        R::Restore { .. } | R::DeleteForever { .. } | R::EmptyTrash => {
+            &[Topic::Files, Topic::Photos, Topic::Trash, Topic::Conflicts]
+        }
+        R::Refresh { scope } => match scope {
+            RefreshScope::Dir { .. } => &[Topic::Files],
+            RefreshScope::Trash => &[Topic::Trash],
+            // A photos refresh answers once it has started; the timeline
+            // publishes again when it lands.
+            RefreshScope::Photos { .. } => &[],
+        },
+        R::RenameDevice { .. } | R::DeleteDevice { .. } => &[Topic::Devices],
+        R::AdoptDevice { .. } => &[Topic::Devices, Topic::Locations],
+        R::AddSyncFolder { .. }
+        | R::RemoveSyncFolder { .. }
+        | R::SetSyncFolderMode { .. }
+        | R::SetSyncFolderPaused { .. }
+        | R::RestoreSyncFolders { .. }
+        | R::RestoreDeviceFolders { .. } => &[Topic::Locations, Topic::Devices],
+        R::RetryPendingOp { .. } => &[Topic::Queue],
+        R::ResolveConflict { .. } => &[Topic::Files, Topic::Trash, Topic::Conflicts],
+        R::ShareNode { .. }
+        | R::ShareNodeByUid { .. }
+        | R::UpdateShareRole { .. }
+        | R::UpdateShareRoleByUid { .. }
+        | R::RemoveShareEntry { .. }
+        | R::RemoveShareEntryByUid { .. }
+        | R::CreatePublicLink { .. }
+        | R::CreatePublicLinkByUid { .. }
+        | R::RemovePublicLink { .. }
+        | R::RemovePublicLinkByUid { .. }
+        | R::StopSharing { .. }
+        | R::StopSharingByUid { .. } => &[Topic::Shares, Topic::Files],
+        R::LeaveShared { .. }
+        | R::AcceptInvitation { .. }
+        | R::RejectInvitation { .. }
+        | R::CreateBookmark { .. }
+        | R::DeleteBookmark { .. } => &[Topic::Shares],
+        R::RestoreRevision { .. }
+        | R::RestoreRevisionByUid { .. }
+        | R::SaveRevisionAs { .. }
+        | R::SaveRevisionAsByUid { .. } => &[Topic::Files],
+        _ => &[],
+    }
+}
+
+/// How long a subscription's writes may block. A client that stops reading
+/// is dropped after this rather than holding its handler forever.
+const SUBSCRIPTION_WRITE_TIMEOUT: Duration = Duration::from_secs(10);
+
+/// Serve a [`CtlRequest::Subscribe`]: send the current status and transfers
+/// and say every topic changed, so the client catches up, then send whatever
+/// the [`EventHub`](super::events::EventHub) collects, with a heartbeat when
+/// nothing does. Ends when the client goes away or the daemon stops.
+fn serve_subscription(core: &Core, username: &str, mountpoint: &Path, mut stream: UnixStream) {
+    let Some(mailbox) = core.events.subscribe() else {
+        warn!("control: refusing a subscription at the limit");
+        if let Ok(mut out) = serde_json::to_vec(&CtlResponse::error(CoreError::remote(
+            "too many subscriptions",
+        ))) {
+            out.push(b'\n');
+            let _ = stream.write_all(&out);
+        }
+        return;
+    };
+    struct Unsubscribe<'a>(&'a Core, std::sync::Arc<super::events::Mailbox>);
+    impl Drop for Unsubscribe<'_> {
+        fn drop(&mut self) {
+            self.0.events.unsubscribe(&self.1);
+        }
+    }
+    let _unsubscribe = Unsubscribe(core, mailbox.clone());
+    if let Err(e) = stream.set_write_timeout(Some(SUBSCRIPTION_WRITE_TIMEOUT)) {
+        warn!(error = %e, "control: could not set subscription timeout");
+        return;
+    }
+    let heartbeat = super::events::event_line(&Event::Heartbeat);
+    let mut lines: Vec<_> = [
+        super::events::event_line(&Event::Status(Box::new(status_response(
+            core, username, mountpoint,
+        )))),
+        super::events::transfers_line(core.transfers.snapshot(), core.jobs_snapshot()),
+        super::events::event_line(&Event::Changed {
+            topics: Topic::ALL.to_vec(),
+        }),
+    ]
+    .into_iter()
+    .flatten()
+    .collect();
+    loop {
+        for line in &lines {
+            if stream.write_all(line.as_bytes()).is_err() {
+                return;
+            }
+        }
+        if core.shutdown.is_stopping() {
+            return;
+        }
+        lines = mailbox.take(HEARTBEAT);
+        if lines.is_empty() {
+            lines.extend(heartbeat.clone());
+        }
+    }
+}
+
 fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: UnixStream) {
    if let Err(e) = stream.set_read_timeout(Some(CONTROL_READ_TIMEOUT)) {
        warn!(error = %e, "control: could not set request timeout");
@@ -232,30 +486,21 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            return;
        }
    };
+    let request = serde_json::from_str::<CtlRequest>(line.trim());
+    // A subscription lasts as long as its client, so it is not a request in
+    // flight and stays out of the diagnostics' list of them.
+    if let Ok(CtlRequest::Subscribe) = request {
+        serve_subscription(core, username, mountpoint, stream);
+        return;
+    }
+    let touched = request.as_ref().map_or(&[][..], touched_topics);
    // Registered before the request is even parsed, so a handler that wedges
    // inside the daemon shows up by name in `pdfs diagnostics`.
    let _inflight = super::diagnostics::InflightGuard::new(super::diagnostics::request_kind(&line));
-    let response = match serde_json::from_str::<CtlRequest>(line.trim()) {
-        Ok(CtlRequest::Status) => {
-            let pins = core.cache.list_pins();
-            let queued = core.db.pending_op_counts().unwrap_or_default();
-            let staging = core.cache.staging_usage();
-            CtlResponse::Status {
-                parked_uploads: queued.parked.max(0) as u64,
-                failing_ops: queued.failing.max(0) as u64,
-                failing_error: queued.last_error.clone(),
-                staged_bytes: staging.bytes,
-                staged_oldest_secs: staging.oldest_secs,
-                username: username.to_string(),
-                mountpoint: mountpoint.display().to_string(),
-                pinned: pins.len(),
-                used: core.cache.usage(),
-                budget: core.cache.budget(),
-                pins,
-                online: core.online.load(Ordering::Relaxed),
-                pending_uploads: queued.uploads.max(0) as u64,
-                pending_changes: queued.changes.max(0) as u64,
-            }
+    let response = match request {
+        Ok(CtlRequest::Status) => status_response(core, username, mountpoint),
+        Ok(CtlRequest::Subscribe) => {
+            CtlResponse::error(CoreError::invalid("a subscription is served on its own"))
        }
        Ok(CtlRequest::Pin { path }) => match rel_to_mount(mountpoint, &path) {
            Ok(rel) => match core.pin(&rel) {
@@ -282,7 +527,7 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            Err(e) => CtlResponse::error(e),
        },
        Ok(CtlRequest::ListPins) => CtlResponse::Pins {
-            pins: core.cache.list_pins(),
+            pins: core.list_pins(),
        },
        Ok(CtlRequest::ListDir { path }) => match route_to_mount(core, mountpoint, &path) {
            Ok((core, rel)) => match core.list_dir(&rel) {
@@ -360,7 +605,15 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            kind,
            range,
            favorites,
-        }) => match core.photos_timeline(offset, clamp_limit(limit), kind, range, favorites) {
+            not_in_album,
+        }) => match core.photos_timeline(
+            offset,
+            clamp_limit(limit),
+            kind,
+            range,
+            favorites,
+            not_in_album,
+        ) {
            Ok(Some(items)) => CtlResponse::Photos {
                available: true,
                items,
@@ -373,6 +626,49 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            },
            Err(e) => CtlResponse::error(e),
        },
+        Ok(CtlRequest::PhotoDuplicates) => match core.photo_duplicates() {
+            Ok(sets) => CtlResponse::PhotoDuplicates { sets },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::PhotoSimilar) => match core.photo_similar() {
+            Ok((sets, hashing, uncompared)) => CtlResponse::PhotoSimilar {
+                sets,
+                hashing,
+                uncompared,
+            },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::PhotoPlaces) => match core.photo_places() {
+            Ok(items) => CtlResponse::Places {
+                items,
+                mapping: core.timeline_progress(),
+            },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::PlacePhotos { id, offset, limit }) => {
+            match core.place_photos(id, offset, clamp_limit(limit)) {
+                Ok(items) => CtlResponse::Photos {
+                    available: true,
+                    items,
+                    counts: None,
+                },
+                Err(e) => CtlResponse::error(e),
+            }
+        }
+        Ok(CtlRequest::PlaceLocations { id }) => match core.place_locations(id) {
+            Ok(items) => CtlResponse::PhotoLocations { items },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::PhotosOnThisDay { limit }) => {
+            match core.photos_on_this_day(clamp_limit(limit)) {
+                Ok(items) => CtlResponse::Photos {
+                    available: true,
+                    items,
+                    counts: None,
+                },
+                Err(e) => CtlResponse::error(e),
+            }
+        }
        Ok(CtlRequest::PhotoGroup { uid }) => match core.photo_group(&uid) {
            Ok(items) => CtlResponse::Photos {
                available: true,
@@ -385,9 +681,9 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            Some(node_uid) => match core.set_photo_favorite(&node_uid, favorite) {
                Ok(()) => CtlResponse::Ok {
                    message: if favorite {
-                        "added to favourites".to_string()
+                        "added to favorites".to_string()
                    } else {
-                        "removed from favourites".to_string()
+                        "removed from favorites".to_string()
                    },
                },
                Err(e) => CtlResponse::error(e),
@@ -419,6 +715,38 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            },
            None => CtlResponse::error(CoreError::invalid(format!("bad album uid: {uid}"))),
        },
+        Ok(CtlRequest::CreateAlbum { name }) => match core.create_album(&name) {
+            Ok(uid) => CtlResponse::AlbumCreated { uid },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::RenameAlbum { uid, name }) => match parse_uid(&uid) {
+            Some(album) => match core.rename_album(&album, &name) {
+                Ok(()) => CtlResponse::Ok {
+                    message: format!("renamed album to {name}"),
+                },
+                Err(e) => CtlResponse::error(e),
+            },
+            None => CtlResponse::error(CoreError::invalid(format!("bad album uid: {uid}"))),
+        },
+        Ok(CtlRequest::DeleteAlbum { uid, delete_photos }) => match parse_uid(&uid) {
+            Some(album) => match core.delete_album(&album, delete_photos) {
+                Ok(()) => CtlResponse::Ok {
+                    message: "album deleted".to_string(),
+                },
+                Err(e) => CtlResponse::error(e),
+            },
+            None => CtlResponse::error(CoreError::invalid(format!("bad album uid: {uid}"))),
+        },
+        Ok(CtlRequest::AddToAlbum { uid, photos }) => {
+            album_change(&uid, &photos, |album, photos| {
+                core.add_to_album(album, photos)
+            })
+        }
+        Ok(CtlRequest::RemoveFromAlbum { uid, photos }) => {
+            album_change(&uid, &photos, |album, photos| {
+                core.remove_from_album(album, photos)
+            })
+        }
        Ok(CtlRequest::PhotoMonths { kind }) => match core.db.photos_months(kind) {
            Ok(months) => CtlResponse::PhotoMonths {
                months: months
@@ -434,8 +762,8 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
                items: core.photo_thumbs(&parsed),
            }
        }
-        Ok(CtlRequest::TrashNodes { uids }) => match Core::parse_uids(&uids) {
-            Ok(parsed) => match core.trash_photos(&parsed) {
+        Ok(CtlRequest::TrashNodes { uids, files_only }) => match Core::parse_uids(&uids) {
+            Ok(parsed) => match core.trash_photos(&parsed, files_only) {
                Ok((trashed, failed)) => CtlResponse::Trashed {
                    trashed,
                    failed: failed
@@ -629,7 +957,11 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
                Err(e) => CtlResponse::error(e),
            }
        }
-        Ok(CtlRequest::Search { query, limit }) => match core.search(&query, clamp_limit(limit)) {
+        Ok(CtlRequest::Search {
+            query,
+            limit,
+            scope,
+        }) => match core.search(&query, clamp_limit(limit), scope.as_deref()) {
            Ok(hits) => CtlResponse::SearchResults { hits },
            Err(e) => CtlResponse::error(e),
        },
@@ -654,8 +986,8 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            },
            Err(e) => CtlResponse::error(e),
        },
-        Ok(CtlRequest::Rename { path, new_name }) => match rel_to_mount(mountpoint, &path) {
-            Ok(rel) => match core.rename(&rel, &new_name) {
+        Ok(CtlRequest::Rename { path, new_name }) => match route_node(core, mountpoint, &path) {
+            Ok((core, rel)) => match core.rename(&rel, &new_name) {
                Ok(name) => {
                    core.log_activity(ActivityKind::Rename, &name, format!("was {path}"), true);
                    CtlResponse::Ok {
@@ -669,6 +1001,24 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            },
            Err(e) => CtlResponse::error(e),
        },
+        // Two absolute paths may name two different locations, which only
+        // `move_between` can resolve; a relative pair keeps the old meaning.
+        Ok(CtlRequest::Move { path, new_parent })
+            if Path::new(&path).is_absolute() && Path::new(&new_parent).is_absolute() =>
+        {
+            match core.move_between(Path::new(&path), Path::new(&new_parent)) {
+                Ok(name) => {
+                    core.log_activity(ActivityKind::Move, &name, format!("to {new_parent}"), true);
+                    CtlResponse::Ok {
+                        message: format!("moved {name}"),
+                    }
+                }
+                Err(e) => {
+                    core.log_activity(ActivityKind::Move, &path, &e, false);
+                    CtlResponse::error(e)
+                }
+            }
+        }
        Ok(CtlRequest::Move { path, new_parent }) => {
            match (
                rel_to_mount(mountpoint, &path),
@@ -694,8 +1044,8 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
                (Err(e), _) | (_, Err(e)) => CtlResponse::error(e),
            }
        }
-        Ok(CtlRequest::Delete { path }) => match rel_to_mount(mountpoint, &path) {
-            Ok(rel) => match core.delete(&rel) {
+        Ok(CtlRequest::Delete { path }) => match route_node(core, mountpoint, &path) {
+            Ok((core, rel)) => match core.delete(&rel) {
                Ok(name) => {
                    core.log_activity(ActivityKind::Trash, &name, "", true);
                    CtlResponse::Ok {
@@ -709,21 +1059,23 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
            },
            Err(e) => CtlResponse::error(e),
        },
-        Ok(CtlRequest::CreateFolder { parent, name }) => match rel_to_mount(mountpoint, &parent) {
-            Ok(parent_rel) => match core.create_folder(&parent_rel, &name) {
-                Ok(name) => {
-                    core.log_activity(ActivityKind::CreateFolder, &name, "", true);
-                    CtlResponse::Ok {
-                        message: format!("created folder {name}"),
+        Ok(CtlRequest::CreateFolder { parent, name }) => {
+            match route_change(core, mountpoint, &parent) {
+                Ok((core, parent_rel)) => match core.create_folder(&parent_rel, &name) {
+                    Ok(name) => {
+                        core.log_activity(ActivityKind::CreateFolder, &name, "", true);
+                        CtlResponse::Ok {
+                            message: format!("created folder {name}"),
+                        }
                    }
-                }
-                Err(e) => {
-                    core.log_activity(ActivityKind::CreateFolder, &name, &e, false);
-                    CtlResponse::error(e)
-                }
-            },
-            Err(e) => CtlResponse::error(e),
-        },
+                    Err(e) => {
+                        core.log_activity(ActivityKind::CreateFolder, &name, &e, false);
+                        CtlResponse::error(e)
+                    }
+                },
+                Err(e) => CtlResponse::error(e),
+            }
+        }
        Ok(CtlRequest::UploadPaths { parent, sources }) => {
            match rel_to_mount(mountpoint, &parent) {
                // Ack immediately and upload on a background thread: a directory tree
@@ -810,9 +1162,14 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
        },
        Ok(CtlRequest::EmptyTrash) => match core.empty_trash() {
            Ok(n) => {
-                core.log_activity(ActivityKind::EmptyTrash, format!("{n} item(s)"), "", true);
+                let items = if n == 1 {
+                    "1 item".to_string()
+                } else {
+                    format!("{n} items")
+                };
+                core.log_activity(ActivityKind::EmptyTrash, items.clone(), "", true);
                CtlResponse::Ok {
-                    message: format!("emptied trash ({n} item(s))"),
+                    message: format!("emptied trash ({items})"),
                }
            }
            Err(e) => CtlResponse::error(e),
@@ -892,6 +1249,29 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
                ))),
            }
        }
+        Ok(CtlRequest::SetBandwidthLimits { upload, download }) => {
+            core.transfers.set_limits(upload, download);
+            // Persisted like the cache budget: best-effort, the live caps are
+            // already applied.
+            match AppDirs::new().map(|dirs| {
+                let mut cfg = dirs.load_config();
+                cfg.upload_limit = Some(upload);
+                cfg.download_limit = Some(download);
+                dirs.save_config(&cfg)
+            }) {
+                Ok(Ok(())) => CtlResponse::Ok {
+                    message: format!(
+                        "bandwidth limits set to {upload} B/s up, {download} B/s down"
+                    ),
+                },
+                Ok(Err(e)) => CtlResponse::error(CoreError::internal(format!(
+                    "limits applied but config write failed: {e}"
+                ))),
+                Err(e) => CtlResponse::error(CoreError::internal(format!(
+                    "limits applied but config unavailable: {e}"
+                ))),
+            }
+        }
        Ok(CtlRequest::ListDevices) => match core.list_devices() {
            Ok(items) => CtlResponse::Devices { items },
            Err(e) => CtlResponse::error(e),
@@ -975,6 +1355,17 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
                Err(e) => CtlResponse::error(e),
            }
        }
+        Ok(CtlRequest::SetSyncFolderPaused { id, paused }) => {
+            match core.set_sync_folder_paused(id, paused) {
+                Ok(()) => CtlResponse::Ok {
+                    message: match paused {
+                        true => format!("folder {id} paused"),
+                        false => format!("folder {id} resumed"),
+                    },
+                },
+                Err(e) => CtlResponse::error(e),
+            }
+        }
        Ok(CtlRequest::SyncNow { id }) => {
            core.sync_now(id);
            CtlResponse::Ok {
@@ -984,22 +1375,77 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
                },
            }
        }
-        Ok(CtlRequest::ListRestorableFolders) => match core.list_restorable_folders() {
+        Ok(CtlRequest::SetSyncPaused { paused, until }) => {
+            match core.set_sync_paused(paused, until) {
+                Ok(()) => CtlResponse::Ok {
+                    message: match (paused, until) {
+                        (false, _) => "sync resumed".to_string(),
+                        (true, None) => "sync paused until resumed".to_string(),
+                        (true, Some(_)) => "sync paused".to_string(),
+                    },
+                },
+                Err(e) => CtlResponse::error(e),
+            }
+        }
+        Ok(CtlRequest::ListConflicts) => match core.list_conflicts() {
+            Ok(items) => CtlResponse::Conflicts { items },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::ResolveConflict { path, keep }) => {
+            match route_change(core, mountpoint, &path) {
+                Ok((core, rel)) => match core.resolve_conflict(&rel, &keep) {
+                    Ok(message) => CtlResponse::Ok { message },
+                    Err(e) => CtlResponse::error(e),
+                },
+                Err(e) => CtlResponse::error(e),
+            }
+        }
+        Ok(CtlRequest::ListPendingOps) => match core.pending_op_infos() {
+            Ok(items) => CtlResponse::PendingOps { items },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::RetryPendingOp { id }) => match core.retry_pending_ops(id) {
+            Ok(0) if id.is_some() => CtlResponse::Ok {
+                message: "nothing to retry: the operation is already due or waiting for a rename"
+                    .to_string(),
+            },
+            Ok(moved) => CtlResponse::Ok {
+                message: format!("retrying {moved} queued operation(s) now"),
+            },
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::ListRestorableFolders) => match core.list_restorable_folders(None) {
            Ok(items) => CtlResponse::RestorableFolders { items },
            Err(e) => CtlResponse::error(e),
        },
-        Ok(CtlRequest::RestoreSyncFolders { items }) => {
+        Ok(CtlRequest::ListDeviceRestorableFolders { device }) => {
+            match core.list_restorable_folders(Some(&device)) {
+                Ok(items) => CtlResponse::RestorableFolders { items },
+                Err(e) => CtlResponse::error(e),
+            }
+        }
+        Ok(
+            request @ (CtlRequest::RestoreSyncFolders { .. }
+            | CtlRequest::RestoreDeviceFolders { .. }),
+        ) => {
+            let (device, items) = match request {
+                CtlRequest::RestoreDeviceFolders { device, items } => (Some(device), items),
+                CtlRequest::RestoreSyncFolders { items } => (None, items),
+                _ => unreachable!("matched above"),
+            };
            // Like AddSyncFolder: each restored folder downloads a whole tree,
            // which outlasts the socket timeout. Ack, then work.
            let core = core.clone();
-            std::thread::spawn(move || match core.restore_sync_folders(&items) {
-                Ok(message) => {
-                    core.touch_profile();
-                    core.log_activity(ActivityKind::Download, &message, "", true);
-                }
-                Err(e) => {
-                    warn!(error = %e, "restore failed");
-                    core.log_activity(ActivityKind::Download, "restore folders", &e, false);
+            std::thread::spawn(move || {
+                match core.restore_sync_folders(&items, device.as_deref()) {
+                    Ok(message) => {
+                        core.touch_profile();
+                        core.log_activity(ActivityKind::Download, &message, "", true);
+                    }
+                    Err(e) => {
+                        warn!(error = %e, "restore failed");
+                        core.log_activity(ActivityKind::Download, "restore folders", &e, false);
+                    }
                }
            });
            CtlResponse::Ok {
@@ -1170,6 +1616,13 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
                Err(e) => CtlResponse::error(e),
            }
        }
+        Ok(CtlRequest::StopSharing { path }) => match rel_to_mount(mountpoint, &path) {
+            Ok(rel) => stop_sharing_reply(core, &path, core.stop_sharing(&rel)),
+            Err(e) => CtlResponse::error(e),
+        },
+        Ok(CtlRequest::StopSharingByUid { uid }) => {
+            stop_sharing_reply(core, &uid, core.stop_sharing_by_uid(&uid))
+        }
        Ok(CtlRequest::ListRevisions { path }) => match rel_to_mount(mountpoint, &path) {
            Ok(rel) => match core.list_revisions(&rel) {
                Ok(items) => CtlResponse::Revisions { items },
@@ -1316,6 +1769,9 @@ fn handle_control_conn(core: &Core, username: &str, mountpoint: &Path, stream: U
        // The request did not parse: the caller sent something malformed.
        Err(e) => CtlResponse::error(CoreError::invalid(format!("bad request: {e}"))),
    };
+    if !touched.is_empty() && !matches!(response, CtlResponse::Error { .. }) {
+        core.events.publish(touched);
+    }
    let mut out = match serde_json::to_vec(&response) {
        Ok(v) => v,
        Err(e) => {
@@ -1437,6 +1893,18 @@ mod request_limit_tests {
        assert!(rel_to_mount(mountpoint, "Photos/../../escape").is_err());
        assert!(rel_to_mount(mountpoint, "/mnt/elsewhere").is_err());
    }
+
+    /// `pdfs rm` and `pdfs rename` reach on-demand mounts, whose root is a whole
+    /// synced folder with a parent on Drive. Only a path below a root may get
+    /// through to the trash or rename call.
+    #[test]
+    fn only_a_path_below_a_mount_root_names_a_node() {
+        assert!(below_root(Path::new("Photos")));
+        assert!(below_root(Path::new("./Photos/2026")));
+        assert!(!below_root(Path::new("")));
+        assert!(!below_root(Path::new(".")));
+        assert!(!below_root(Path::new("./.")));
+    }
 }

 #[cfg(test)]
@@ -27,7 +27,7 @@ use tracing::{info, warn};

 use super::sync::{self, base_name};
 use super::{
-    Core, SecondaryInsertRejection, SecondaryMount, State, SwitchBlocked, clear_stale_mount,
+    Core, SecondaryInsertRejection, SecondaryMount, SwitchBlocked, clear_stale_mount,
    device_type_str, dir_is_empty, evict_dir_contents, fuse_connection_id, is_stale_mount,
    now_secs, parse_uid, spawn_session, sync_folder_info, this_hostname,
 };
@@ -128,6 +128,7 @@ impl Core {
            location.mounted = self.states.is_mounted_at(Path::new(&location.local_path));
            if let MountKind::Device { sync_folder_id } = &location.kind {
                location.progress = progress.get(sync_folder_id).cloned();
+                location.paused = self.sync_folder_paused(*sync_folder_id);
            }
        }
        Ok(locations)
@@ -226,6 +227,39 @@ impl Core {
        Ok(format!("adopted device {name}"))
    }

+    /// The device a restore reads from: this machine's own for `None`, else
+    /// the registered device with that uid.
+    ///
+    /// Another device is looked up without touching the cached device row —
+    /// restoring its folders here must not make this machine back up as it.
+    /// Its folders are then attached with that device's share id, so they sync
+    /// against the other computer's tree.
+    pub(crate) fn restore_source(&self, device: Option<&str>) -> CoreResult<StoredDevice> {
+        let Some(uid) = device else {
+            return self.ensure_device();
+        };
+        let remote = self
+            .rt
+            .block_on(self.client.enumerate_devices())
+            .map_err(|e| CoreError::from_api(&e, "enumerate devices"))?;
+        let d = remote
+            .into_iter()
+            .find(|d| d.uid.to_string() == uid)
+            .ok_or_else(|| CoreError::not_found(format!("no device {uid} in this account")))?;
+        Ok(StoredDevice {
+            uid: d.uid.to_string(),
+            share_id: d.share_id.to_string(),
+            root_uid: d.root_folder_uid.to_string(),
+            name: d
+                .name
+                .as_deref()
+                .ok()
+                .unwrap_or("(unnamed device)")
+                .to_string(),
+            created: d.creation_time,
+        })
+    }
+
    // ---- device folder sync (devices.md, Phase 1) -------------------------

    /// Auto-register (or recover) this machine as a Proton Drive Device, caching
@@ -329,14 +363,14 @@ impl Core {
    ) -> CoreResult<Option<NodeUid>> {
        let uids = self
            .rt
-            .block_on(self.client.enumerate_folder_children_node_uids(root_uid))
+            .block_on(self.drive.enumerate_folder_children_node_uids(root_uid))
            .map_err(|e| CoreError::from_api(&e, "list device root"))?;
        if uids.is_empty() {
            return Ok(None);
        }
        let nodes = self
            .rt
-            .block_on(self.client.enumerate_nodes(&uids))
+            .block_on(self.drive.enumerate_nodes(&uids))
            .map_err(|e| CoreError::from_api(&e, "resolve device root children"))?;
        Ok(nodes
            .into_iter()
@@ -412,10 +446,7 @@ impl Core {
            }
            None => self
                .rt
-                .block_on(
-                    self.client
-                        .create_folder(&root_uid, &name, Some(now_secs())),
-                )
+                .block_on(self.drive.create_folder(&root_uid, &name, Some(now_secs())))
                .map_err(|e| CoreError::from_api(&e, &format!("create device folder {name}")))?,
        };

@@ -448,7 +479,8 @@ impl Core {
            .into_iter()
            .map(|f| {
                let live = progress.get(&f.id).cloned();
-                sync_folder_info(f, live)
+                let paused = self.sync_folder_paused(f.id);
+                sync_folder_info(f, live, paused)
            })
            .collect())
    }
@@ -561,13 +593,14 @@ impl Core {
            return Err(CoreError::invalid(format!("no synced folder with id {id}")));
        }
        drop(_guard);
+        self.clear_sync_folder_paused(id);
        // Stop watching the folder we just dropped.
        let _ = self.sync_tx.send(sync::SyncMsg::Rewatch);
        if delete_remote
            && let Some(uid) = parse_uid(&folder.remote_uid)
            && let Err(e) = self
                .rt
-                .block_on(self.client.trash_nodes(&[uid]))
+                .block_on(self.drive.trash_nodes(&[uid]))
                .and_then(batch::into_unit)
        {
            warn!(id, error = %e, "delete remote device folder failed");
@@ -583,23 +616,16 @@ impl Core {
        };
    }

-    /// A sibling Core that shares this one's client/rt/cache/db (and transfer,
-    /// activity, mount registries) but gets a **fresh, empty `State`** — its own
-    /// inode space starting at [`ROOT_INO`]. Used to root a secondary FUSE session
-    /// at an `ondemand` sync folder without colliding with the main mount's inodes
-    /// (devices.md Phase 3).
+    /// A sibling Core for a secondary FUSE session rooted at an `ondemand` sync
+    /// folder (devices.md Phase 3). It shares everything with this one,
+    /// the tree included, except what belongs to a session: its root and its
+    /// kernel channel, both filled in when the session is built.
    pub(crate) fn fork_state(&self) -> Core {
        let mut fork = self.clone();
        fork.primary = false;
-        let share_access = self.state().share_access.clone();
-        fork.state = Arc::new(Mutex::new(State::new(self.db.clone(), share_access, 2)));
-        // A fresh inode space needs a fresh notification channel: this fork's
-        // session is the only one that knows these inodes, so it must be the one
-        // notified about them. Filled in by `spawn_ondemand_mount`.
+        fork.root = Arc::new(OnceLock::new());
        fork.notifier = Arc::new(OnceLock::new());
        fork.session_live = Arc::new(std::sync::atomic::AtomicBool::new(false));
-        // Size upgrades are keyed by inode, which is per-fork too.
-        fork.size_upgrades = Arc::new(Mutex::new(HashMap::new()));
        fork
    }

@@ -625,6 +651,13 @@ impl Core {
            .ok_or_else(|| CoreError::not_found(format!("no synced folder with id {id}")))?;
        let current_mode = ApplicableMountMode::parse(&folder.mode)
            .map_err(|error| CoreError::invalid(format!("unsupported current mode: {error}")))?;
+        // A switch waits on the folder's reconcile, which a pause skips; refuse
+        // it up front rather than queue it indefinitely.
+        if current_mode != target_mode && self.sync_folder_paused(id) {
+            return Err(CoreError::invalid(
+                "this folder is paused; resume it before changing its mode",
+            ));
+        }
        if current_mode == target_mode {
            let mode_str = target_mode.as_str();
            let lock = self.sync_lock(id);
@@ -815,7 +848,7 @@ impl Core {
                })?;
                let root = self
                    .rt
-                    .block_on(self.client.enumerate_nodes(std::slice::from_ref(&root_uid)))
+                    .block_on(self.drive.enumerate_nodes(std::slice::from_ref(&root_uid)))
                    .map_err(|e| SwitchBlocked::Failed(format!("fetch remote root: {e}")))?
                    .into_iter()
                    .next()
@@ -894,8 +927,8 @@ impl Core {
        }
    }

-    /// Spawn a secondary FUSE session rooted at `root` over `local` on a forked
-    /// inode space. Clears any stale kernel mount first (a crashed run can leave
+    /// Spawn a secondary FUSE session rooted at `root` over `local` from a
+    /// [`Core::fork_state`] sibling. Clears any stale kernel mount first (a crashed run can leave
    /// one, which would fail the fresh mount with EBUSY).
    pub(crate) fn spawn_ondemand_mount(
        &self,
@@ -974,7 +1007,7 @@ impl Core {
            };
            let root = match self
                .rt
-                .block_on(self.client.enumerate_nodes(std::slice::from_ref(&root_uid)))
+                .block_on(self.drive.enumerate_nodes(std::slice::from_ref(&root_uid)))
            {
                Ok(v) => match v.into_iter().next() {
                    Some(n) => n,
@@ -0,0 +1,466 @@
+//! The calls the sync core makes to Drive, behind a trait.
+//!
+//! `Core` used to hold a concrete [`ProtonDriveClient`], so no test could make
+//! Drive answer late, answer stale, or not answer at all, and the interleavings
+//! behind most recent bugs could only be found on a real account over a slow
+//! link (`docs/MILESTONE-3.0.0.md` §2, §8.1). [`DriveApi`] is the part of the
+//! client the mount, the drain, the event feed and the mirror engine use; the
+//! real client implements it by forwarding, and the simulation tests implement
+//! it with an in-memory Drive that injects Drive's known faults.
+//!
+//! Sharing, Photos, devices, invitations and public links stay on the concrete
+//! client (`Core::client`) until a test needs them faked.
+//!
+//! The method names match the client's own, so a call site reads the same
+//! whichever it goes through. The client's generic methods (a reader or writer
+//! of any type) cannot be part of an object-safe trait, so the trait takes them
+//! as trait objects and `impl dyn DriveApi` puts the generic signatures back.
+
+use std::io::{Read, Write};
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use futures::StreamExt as _;
+use futures::stream::BoxStream;
+use proton_drive_rs::proton_sdk::account::Quota;
+use proton_drive_rs::proton_sdk::error::Result;
+use proton_drive_rs::proton_sdk::ids::{DriveEventId, NodeUid};
+use proton_drive_rs::{
+    DriveEvent, DriveEventScopeId, Node, NodeMoveItem, ProtonDriveClient, RevisionReader, Thumbnail,
+};
+
+/// One outcome per node of a batch request; see [`ProtonDriveClient::trash_nodes`].
+pub(crate) type NodeOutcomes = Vec<(NodeUid, Result<()>)>;
+
+/// The outcomes of a streaming batch request, one item per node as it lands.
+pub(crate) type OutcomeStream<'a> = BoxStream<'a, Result<(NodeUid, Result<()>)>>;
+
+/// Drive as the sync core sees it. See the module documentation.
+#[async_trait]
+pub(crate) trait DriveApi: Send + Sync {
+    async fn get_my_files_folder(&self) -> Result<Node>;
+
+    async fn get_node(&self, uid: &NodeUid) -> Result<Option<Node>>;
+
+    async fn enumerate_nodes(&self, uids: &[NodeUid]) -> Result<Vec<Node>>;
+
+    /// As [`DriveApi::enumerate_nodes`], but files carry no claimed size or
+    /// modification time; see [`ProtonDriveClient::enumerate_nodes_light`].
+    async fn enumerate_nodes_light(&self, uids: &[NodeUid]) -> Result<Vec<Node>>;
+
+    async fn enumerate_folder_children_node_uids(
+        &self,
+        folder_uid: &NodeUid,
+    ) -> Result<Vec<NodeUid>>;
+
+    async fn enumerate_events(
+        &self,
+        scope: &DriveEventScopeId,
+        cursor: Option<&DriveEventId>,
+    ) -> Result<Vec<DriveEvent>>;
+
+    async fn invalidate_caches_for_event(&self, event: &DriveEvent) -> Result<()>;
+
+    async fn create_folder(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        last_modification_time: Option<i64>,
+    ) -> Result<NodeUid>;
+
+    async fn upload_file(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        contents: &[u8],
+    ) -> Result<NodeUid>;
+
+    #[allow(clippy::too_many_arguments)]
+    async fn upload_file_from_dyn(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        reader: &mut (dyn Read + Send),
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+        aead: bool,
+    ) -> Result<NodeUid>;
+
+    #[allow(clippy::too_many_arguments)]
+    async fn upload_file_replacing_draft_from_dyn(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        reader: &mut (dyn Read + Send),
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+        aead: bool,
+    ) -> Result<NodeUid>;
+
+    async fn upload_new_revision_from_dyn(
+        &self,
+        file_uid: &NodeUid,
+        reader: &mut (dyn Read + Send),
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+    ) -> Result<()>;
+
+    async fn open_revision(&self, uid: &NodeUid) -> Result<Arc<dyn RevisionRead>>;
+
+    async fn download_file_to_dyn(
+        &self,
+        uid: &NodeUid,
+        output: &mut (dyn Write + Send),
+    ) -> Result<()>;
+
+    async fn download_revision_to_dyn(
+        &self,
+        file_uid: &NodeUid,
+        revision_id: &str,
+        writer: &mut (dyn Write + Send),
+    ) -> Result<()>;
+
+    async fn rename_node(
+        &self,
+        uid: &NodeUid,
+        new_name: &str,
+        new_media_type: Option<&str>,
+    ) -> Result<()>;
+
+    async fn move_node(&self, uid: &NodeUid, new_parent: &NodeUid) -> Result<()>;
+
+    fn move_nodes_streaming<'a>(
+        &'a self,
+        items: Vec<NodeMoveItem>,
+        new_parent: NodeUid,
+    ) -> OutcomeStream<'a>;
+
+    async fn trash_nodes(&self, uids: &[NodeUid]) -> Result<NodeOutcomes>;
+
+    async fn restore_nodes(&self, uids: &[NodeUid]) -> Result<NodeOutcomes>;
+
+    fn restore_nodes_streaming<'a>(&'a self, uids: &[NodeUid]) -> OutcomeStream<'a>;
+
+    fn delete_nodes_streaming<'a>(&'a self, uids: &[NodeUid]) -> OutcomeStream<'a>;
+
+    async fn enumerate_trash_node_uids(&self) -> Result<Vec<NodeUid>>;
+
+    /// The account's storage, across every Proton product.
+    async fn quota(&self) -> Result<Quota>;
+}
+
+/// The generic signatures of the client, over the object-safe ones above.
+impl dyn DriveApi {
+    #[allow(clippy::too_many_arguments)]
+    pub(crate) async fn upload_file_from<R: Read + Send>(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        mut reader: R,
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+        aead: bool,
+    ) -> Result<NodeUid> {
+        self.upload_file_from_dyn(
+            parent_uid,
+            name,
+            media_type,
+            &mut reader,
+            intended_size,
+            thumbnails,
+            last_modification_time,
+            aead,
+        )
+        .await
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    pub(crate) async fn upload_file_replacing_draft_from<R: Read + Send>(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        mut reader: R,
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+        aead: bool,
+    ) -> Result<NodeUid> {
+        self.upload_file_replacing_draft_from_dyn(
+            parent_uid,
+            name,
+            media_type,
+            &mut reader,
+            intended_size,
+            thumbnails,
+            last_modification_time,
+            aead,
+        )
+        .await
+    }
+
+    pub(crate) async fn upload_new_revision_from<R: Read + Send>(
+        &self,
+        file_uid: &NodeUid,
+        mut reader: R,
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+    ) -> Result<()> {
+        self.upload_new_revision_from_dyn(
+            file_uid,
+            &mut reader,
+            intended_size,
+            thumbnails,
+            last_modification_time,
+        )
+        .await
+    }
+
+    pub(crate) async fn download_file_to<W: Write + Send>(
+        &self,
+        uid: &NodeUid,
+        output: &mut W,
+    ) -> Result<()> {
+        self.download_file_to_dyn(uid, output).await
+    }
+
+    pub(crate) async fn download_revision_to<W: Write + Send>(
+        &self,
+        file_uid: &NodeUid,
+        revision_id: &str,
+        writer: &mut W,
+    ) -> Result<()> {
+        self.download_revision_to_dyn(file_uid, revision_id, writer)
+            .await
+    }
+}
+
+/// An open revision that block reads are served from; see [`RevisionReader`].
+#[async_trait]
+pub(crate) trait RevisionRead: Send + Sync {
+    /// Plaintext size of the revision.
+    fn size(&self) -> u64;
+
+    /// Plaintext size of each block, in block order.
+    fn block_sizes(&self) -> &[u64];
+
+    async fn read_at(&self, offset: u64, length: u64) -> Result<Vec<u8>>;
+}
+
+#[async_trait]
+impl RevisionRead for RevisionReader {
+    fn size(&self) -> u64 {
+        RevisionReader::size(self)
+    }
+
+    fn block_sizes(&self) -> &[u64] {
+        RevisionReader::block_sizes(self)
+    }
+
+    async fn read_at(&self, offset: u64, length: u64) -> Result<Vec<u8>> {
+        RevisionReader::read_at(self, offset, length).await
+    }
+}
+
+#[async_trait]
+impl DriveApi for ProtonDriveClient {
+    async fn get_my_files_folder(&self) -> Result<Node> {
+        ProtonDriveClient::get_my_files_folder(self).await
+    }
+
+    async fn get_node(&self, uid: &NodeUid) -> Result<Option<Node>> {
+        ProtonDriveClient::get_node(self, uid).await
+    }
+
+    async fn enumerate_nodes(&self, uids: &[NodeUid]) -> Result<Vec<Node>> {
+        ProtonDriveClient::enumerate_nodes(self, uids).await
+    }
+
+    async fn enumerate_nodes_light(&self, uids: &[NodeUid]) -> Result<Vec<Node>> {
+        ProtonDriveClient::enumerate_nodes_light(self, uids).await
+    }
+
+    async fn enumerate_folder_children_node_uids(
+        &self,
+        folder_uid: &NodeUid,
+    ) -> Result<Vec<NodeUid>> {
+        ProtonDriveClient::enumerate_folder_children_node_uids(self, folder_uid).await
+    }
+
+    async fn enumerate_events(
+        &self,
+        scope: &DriveEventScopeId,
+        cursor: Option<&DriveEventId>,
+    ) -> Result<Vec<DriveEvent>> {
+        ProtonDriveClient::enumerate_events(self, scope, cursor).await
+    }
+
+    async fn invalidate_caches_for_event(&self, event: &DriveEvent) -> Result<()> {
+        ProtonDriveClient::invalidate_caches_for_event(self, event).await
+    }
+
+    async fn create_folder(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        last_modification_time: Option<i64>,
+    ) -> Result<NodeUid> {
+        ProtonDriveClient::create_folder(self, parent_uid, name, last_modification_time).await
+    }
+
+    async fn upload_file(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        contents: &[u8],
+    ) -> Result<NodeUid> {
+        ProtonDriveClient::upload_file(self, parent_uid, name, media_type, contents).await
+    }
+
+    async fn upload_file_from_dyn(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        reader: &mut (dyn Read + Send),
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+        aead: bool,
+    ) -> Result<NodeUid> {
+        ProtonDriveClient::upload_file_from(
+            self,
+            parent_uid,
+            name,
+            media_type,
+            reader,
+            intended_size,
+            thumbnails,
+            last_modification_time,
+            aead,
+        )
+        .await
+    }
+
+    async fn upload_file_replacing_draft_from_dyn(
+        &self,
+        parent_uid: &NodeUid,
+        name: &str,
+        media_type: &str,
+        reader: &mut (dyn Read + Send),
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+        aead: bool,
+    ) -> Result<NodeUid> {
+        ProtonDriveClient::upload_file_replacing_draft_from(
+            self,
+            parent_uid,
+            name,
+            media_type,
+            reader,
+            intended_size,
+            thumbnails,
+            last_modification_time,
+            aead,
+        )
+        .await
+    }
+
+    async fn upload_new_revision_from_dyn(
+        &self,
+        file_uid: &NodeUid,
+        reader: &mut (dyn Read + Send),
+        intended_size: i64,
+        thumbnails: Vec<Thumbnail>,
+        last_modification_time: Option<i64>,
+    ) -> Result<()> {
+        ProtonDriveClient::upload_new_revision_from(
+            self,
+            file_uid,
+            reader,
+            intended_size,
+            thumbnails,
+            last_modification_time,
+        )
+        .await
+    }
+
+    async fn open_revision(&self, uid: &NodeUid) -> Result<Arc<dyn RevisionRead>> {
+        let reader = ProtonDriveClient::open_revision(self, uid).await?;
+        Ok(Arc::new(reader))
+    }
+
+    async fn download_file_to_dyn(
+        &self,
+        uid: &NodeUid,
+        output: &mut (dyn Write + Send),
+    ) -> Result<()> {
+        ProtonDriveClient::download_file_to(self, uid, &mut &mut *output).await
+    }
+
+    async fn download_revision_to_dyn(
+        &self,
+        file_uid: &NodeUid,
+        revision_id: &str,
+        writer: &mut (dyn Write + Send),
+    ) -> Result<()> {
+        ProtonDriveClient::download_revision_to(self, file_uid, revision_id, &mut &mut *writer)
+            .await
+    }
+
+    async fn rename_node(
+        &self,
+        uid: &NodeUid,
+        new_name: &str,
+        new_media_type: Option<&str>,
+    ) -> Result<()> {
+        ProtonDriveClient::rename_node(self, uid, new_name, new_media_type).await
+    }
+
+    async fn move_node(&self, uid: &NodeUid, new_parent: &NodeUid) -> Result<()> {
+        ProtonDriveClient::move_node(self, uid, new_parent).await
+    }
+
+    fn move_nodes_streaming<'a>(
+        &'a self,
+        items: Vec<NodeMoveItem>,
+        new_parent: NodeUid,
+    ) -> OutcomeStream<'a> {
+        ProtonDriveClient::move_nodes_streaming(self, items, new_parent).boxed()
+    }
+
+    async fn trash_nodes(&self, uids: &[NodeUid]) -> Result<NodeOutcomes> {
+        ProtonDriveClient::trash_nodes(self, uids).await
+    }
+
+    async fn restore_nodes(&self, uids: &[NodeUid]) -> Result<NodeOutcomes> {
+        ProtonDriveClient::restore_nodes(self, uids).await
+    }
+
+    fn restore_nodes_streaming<'a>(&'a self, uids: &[NodeUid]) -> OutcomeStream<'a> {
+        ProtonDriveClient::restore_nodes_streaming(self, uids).boxed()
+    }
+
+    fn delete_nodes_streaming<'a>(&'a self, uids: &[NodeUid]) -> OutcomeStream<'a> {
+        ProtonDriveClient::delete_nodes_streaming(self, uids).boxed()
+    }
+
+    async fn enumerate_trash_node_uids(&self) -> Result<Vec<NodeUid>> {
+        ProtonDriveClient::enumerate_trash_node_uids(self).await
+    }
+
+    async fn quota(&self) -> Result<Quota> {
+        ProtonDriveClient::quota(self).await
+    }
+}
@@ -0,0 +1,321 @@
+//! Push notifications for front-ends: the daemon's side of
+//! [`Request::Subscribe`](pdfs_core::control::Request::Subscribe).
+//!
+//! Front-ends used to poll. The app asked for the status every two seconds, the
+//! tray every three, and pages re-read themselves on a timer, whether or not
+//! anything had changed. Now each subscription owns a [`Mailbox`] in the
+//! [`EventHub`]. Code that changes something publishes a [`Topic`], and
+//! [`run_event_sampler`] watches the few things that change without passing
+//! through one place (the status, transfers, sync progress) and publishes them
+//! when they differ.
+
+use std::collections::BTreeSet;
+use std::sync::Arc;
+use std::time::Duration;
+
+use parking_lot::{Condvar, Mutex, MutexGuard};
+use pdfs_core::control::{Event, JobItem, Response as CtlResponse, Topic, TransferItem};
+use tracing::warn;
+
+use super::Core;
+
+/// Most subscriptions served at once. Each holds a control handler for as long
+/// as it lasts; the app and the tray need one apiece, and the cap keeps a
+/// misbehaving client from spending the handlers that requests need.
+const MAX_SUBSCRIBERS: usize = 8;
+
+/// How long a subscription waits after a change before it sends, so a burst
+/// (a folder of files trashed at once) goes out as one event.
+const COALESCE: Duration = Duration::from_millis(150);
+
+/// How often [`run_event_sampler`] looks at transfers. Status and sync
+/// progress are looked at every other time.
+const SAMPLE_INTERVAL: Duration = Duration::from_millis(500);
+
+/// Every open subscription's mailbox. Shared by every clone of [`Core`],
+/// on-demand forks included, so a change in any mount reaches every client.
+#[derive(Default)]
+pub(crate) struct EventHub {
+    mailboxes: Mutex<Vec<Arc<Mailbox>>>,
+}
+
+/// What one subscription has yet to send.
+#[derive(Default)]
+pub(crate) struct Mailbox {
+    inbox: Mutex<Inbox>,
+    ready: Condvar,
+}
+
+#[derive(Default)]
+struct Inbox {
+    topics: BTreeSet<Topic>,
+    /// The newest [`Event::Status`] line. A newer one replaces it unsent: a
+    /// client wants the current status, not every status in between.
+    status: Option<Arc<str>>,
+    /// The newest [`Event::Transfers`] line, replaced the same way.
+    transfers: Option<Arc<str>>,
+}
+
+impl Inbox {
+    fn is_empty(&self) -> bool {
+        self.topics.is_empty() && self.status.is_none() && self.transfers.is_none()
+    }
+}
+
+/// `event` as one line of the wire format, newline included.
+pub(crate) fn event_line(event: &Event) -> Option<Arc<str>> {
+    match serde_json::to_string(event) {
+        Ok(mut line) => {
+            line.push('\n');
+            Some(line.into())
+        }
+        Err(e) => {
+            warn!(error = %e, "events: serialize event failed");
+            None
+        }
+    }
+}
+
+impl EventHub {
+    /// Tell every subscriber that `topics` changed.
+    pub(crate) fn publish(&self, topics: &[Topic]) {
+        self.deliver(|inbox| inbox.topics.extend(topics.iter().copied()));
+    }
+
+    /// Hand every subscriber a fresh status.
+    fn publish_status(&self, line: Arc<str>) {
+        self.deliver(|inbox| inbox.status = Some(line.clone()));
+    }
+
+    /// Hand every subscriber a fresh transfers snapshot.
+    fn publish_transfers(&self, line: Arc<str>) {
+        self.deliver(|inbox| inbox.transfers = Some(line.clone()));
+    }
+
+    fn deliver(&self, put: impl Fn(&mut Inbox)) {
+        for mailbox in self.mailboxes.lock().iter() {
+            put(&mut mailbox.inbox.lock());
+            mailbox.ready.notify_one();
+        }
+    }
+
+    /// Open a mailbox, or `None` at [`MAX_SUBSCRIBERS`].
+    pub(crate) fn subscribe(&self) -> Option<Arc<Mailbox>> {
+        let mut mailboxes = self.mailboxes.lock();
+        if mailboxes.len() >= MAX_SUBSCRIBERS {
+            return None;
+        }
+        let mailbox = Arc::new(Mailbox::default());
+        mailboxes.push(mailbox.clone());
+        Some(mailbox)
+    }
+
+    pub(crate) fn unsubscribe(&self, mailbox: &Arc<Mailbox>) {
+        self.mailboxes
+            .lock()
+            .retain(|other| !Arc::ptr_eq(other, mailbox));
+    }
+
+    fn has_subscribers(&self) -> bool {
+        !self.mailboxes.lock().is_empty()
+    }
+}
+
+impl Mailbox {
+    /// Wait up to `timeout` for something to send, then take it as wire lines:
+    /// the status first, then transfers, then the changed topics. Empty when
+    /// nothing arrived in time.
+    pub(crate) fn take(&self, timeout: Duration) -> Vec<Arc<str>> {
+        let mut inbox = self.inbox.lock();
+        if inbox.is_empty() {
+            self.ready.wait_for(&mut inbox, timeout);
+            if inbox.is_empty() {
+                return Vec::new();
+            }
+            // Let the rest of a burst arrive before sending the first of it.
+            MutexGuard::unlocked(&mut inbox, || std::thread::sleep(COALESCE));
+        }
+        let mut lines = Vec::new();
+        lines.extend(inbox.status.take());
+        lines.extend(inbox.transfers.take());
+        if !inbox.topics.is_empty() {
+            let topics = std::mem::take(&mut inbox.topics).into_iter().collect();
+            lines.extend(event_line(&Event::Changed { topics }));
+        }
+        lines
+    }
+}
+
+/// The [`Event::Transfers`] line for a snapshot.
+pub(crate) fn transfers_line(items: Vec<TransferItem>, jobs: Vec<JobItem>) -> Option<Arc<str>> {
+    event_line(&Event::Transfers { items, jobs })
+}
+
+/// Watch what changes without a single place to publish it from, and publish it
+/// when it differs from the last look: the status (queue counts, cache use,
+/// online, pause), the transfers snapshot, and the synced folders with their
+/// live progress. Looks only while someone is subscribed.
+pub(crate) fn run_event_sampler(core: Core, username: String, mountpoint: std::path::PathBuf) {
+    let mut transfers: Option<Arc<str>> = None;
+    let mut status: Option<String> = None;
+    let mut queue: Option<String> = None;
+    let mut locations: Option<String> = None;
+    let mut tick = 0u32;
+    while core.shutdown.sleep(SAMPLE_INTERVAL) {
+        if !core.events.has_subscribers() {
+            // A new subscription starts from a snapshot of its own, so there is
+            // nothing to compare against until then.
+            transfers = None;
+            status = None;
+            queue = None;
+            locations = None;
+            continue;
+        }
+        let line = transfers_line(core.transfers.snapshot(), core.jobs_snapshot());
+        if line.is_some() && line != transfers {
+            transfers = line.clone();
+            if let Some(line) = line {
+                core.events.publish_transfers(line);
+            }
+        }
+
+        tick = tick.wrapping_add(1);
+        if !tick.is_multiple_of(2) {
+            continue;
+        }
+        let now = super::control::status_response(&core, &username, &mountpoint);
+        let (key, queue_key) = status_keys(&now);
+        if status.as_ref().is_some_and(|last| *last != key)
+            && let Some(line) = event_line(&Event::Status(Box::new(now)))
+        {
+            core.events.publish_status(line);
+        }
+        status = Some(key);
+        if queue.as_ref().is_some_and(|last| *last != queue_key) {
+            core.events.publish(&[Topic::Queue]);
+        }
+        queue = Some(queue_key);
+
+        if let Ok(now) = core.list_locations() {
+            let key = serde_json::to_string(&now).unwrap_or_default();
+            if locations.as_ref().is_some_and(|last| *last != key) {
+                core.events.publish(&[Topic::Locations]);
+            }
+            locations = Some(key);
+        }
+    }
+}
+
+/// What makes two statuses different enough to send, and what makes their
+/// queues different. The age of the oldest staged write is left out of both:
+/// it grows every second while anything is staged, which is not news.
+fn status_keys(status: &CtlResponse) -> (String, String) {
+    let CtlResponse::Status {
+        parked_uploads,
+        failing_ops,
+        failing_error,
+        staged_bytes,
+        paused,
+        paused_until,
+        username,
+        mountpoint,
+        pinned,
+        used,
+        budget,
+        online,
+        pending_uploads,
+        pending_changes,
+        ..
+    } = status
+    else {
+        return (String::new(), String::new());
+    };
+    let queue = format!(
+        "{pending_uploads}/{pending_changes}/{parked_uploads}/{failing_ops}/{failing_error:?}"
+    );
+    let key = format!(
+        "{queue}/{staged_bytes}/{paused}/{paused_until:?}/{username}/{mountpoint}/{pinned}/\
+         {used}/{budget}/{online}"
+    );
+    (key, queue)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn changed(line: &str) -> Vec<Topic> {
+        match serde_json::from_str::<Event>(line.trim()) {
+            Ok(Event::Changed { topics }) => topics,
+            other => panic!("not a change event: {other:?}"),
+        }
+    }
+
+    #[test]
+    fn a_burst_of_changes_arrives_as_one_event() {
+        let hub = EventHub::default();
+        let mailbox = hub.subscribe().expect("room for a subscriber");
+        hub.publish(&[Topic::Trash, Topic::Files]);
+        hub.publish(&[Topic::Files]);
+        let lines = mailbox.take(Duration::from_secs(1));
+        assert_eq!(lines.len(), 1);
+        assert_eq!(changed(&lines[0]), vec![Topic::Files, Topic::Trash]);
+        assert!(mailbox.take(Duration::from_millis(10)).is_empty());
+    }
+
+    #[test]
+    fn a_newer_status_replaces_one_not_yet_sent() {
+        let hub = EventHub::default();
+        let mailbox = hub.subscribe().expect("room for a subscriber");
+        hub.publish_status("first\n".into());
+        hub.publish_status("second\n".into());
+        assert_eq!(
+            mailbox.take(Duration::from_secs(1)),
+            vec![Arc::<str>::from("second\n")]
+        );
+    }
+
+    #[test]
+    fn a_closed_subscription_gets_nothing_more() {
+        let hub = EventHub::default();
+        let mailbox = hub.subscribe().expect("room for a subscriber");
+        hub.unsubscribe(&mailbox);
+        hub.publish(&[Topic::Files]);
+        assert!(mailbox.take(Duration::from_millis(10)).is_empty());
+        assert!(!hub.has_subscribers());
+    }
+
+    #[test]
+    fn subscriptions_are_capped() {
+        let hub = EventHub::default();
+        let open: Vec<_> = (0..MAX_SUBSCRIBERS)
+            .map(|_| hub.subscribe().expect("room for a subscriber"))
+            .collect();
+        assert!(hub.subscribe().is_none());
+        hub.unsubscribe(&open[0]);
+        assert!(hub.subscribe().is_some());
+    }
+
+    #[test]
+    fn the_age_of_a_staged_write_is_not_a_change() {
+        let status = |staged_oldest_secs| CtlResponse::Status {
+            parked_uploads: 0,
+            failing_ops: 0,
+            failing_error: None,
+            staged_bytes: 10,
+            staged_oldest_secs,
+            paused: false,
+            paused_until: None,
+            username: "u".into(),
+            mountpoint: "/m".into(),
+            pinned: 0,
+            used: 0,
+            budget: 0,
+            pins: Vec::new(),
+            online: true,
+            pending_uploads: 1,
+            pending_changes: 0,
+        };
+        assert_eq!(status_keys(&status(5)), status_keys(&status(6)));
+    }
+}
@@ -72,7 +72,7 @@ impl Filesystem for ProtonFs {
    }

    fn lookup(&self, _req: &Request, parent: INodeNo, name: &OsStr, reply: ReplyEntry) {
-        let parent = parent.0;
+        let parent = self.tree(parent).0;
        let name = match fuse_name(name) {
            Ok(name) => name,
            Err(error) => {
@@ -95,11 +95,13 @@ impl Filesystem for ProtonFs {
    }

    fn forget(&self, _req: &Request, ino: INodeNo, nlookup: u64) {
+        let ino = self.tree(ino);
        let mut st = self.core.state();
        st.forget_lookup(ino.0, nlookup);
    }

    fn getattr(&self, _req: &Request, ino: INodeNo, _fh: Option<FileHandle>, reply: ReplyAttr) {
+        let ino = self.tree(ino);
        let (attr, provisional_in) = {
            let st = self.core.state();
            match st.entries.get(&ino.0) {
@@ -175,7 +177,7 @@ impl Filesystem for ProtonFs {
    /// Enumerating a cold folder is a remote call, so it goes to a worker for
    /// the same reason `lookup` and `readdir` do.
    fn opendir(&self, _req: &Request, ino: INodeNo, _flags: OpenFlags, reply: ReplyOpen) {
-        let ino = ino.0;
+        let ino = self.tree(ino).0;
        if self.core.children_cached(ino) {
            self.serve_opendir(ino, reply);
            return;
@@ -194,13 +196,13 @@ impl Filesystem for ProtonFs {
        offset: u64,
        reply: ReplyDirectory,
    ) {
-        let ino = ino.0;
+        let ino = self.tree(ino).0;
        // The snapshot is the whole point: served from it, this is a pure
        // in-memory walk with no chance of a remote call, so it never needs a
        // worker. Only a handle whose `opendir` failed to snapshot (or a kernel
        // that issued `readdir` without one) falls back to the live path.
        if let Some(listing) = self.core.state().dir_snapshots.get(&fh.0).cloned() {
-            reply_listing(&listing, offset, reply);
+            reply_listing(&listing, offset, self.root, reply);
            return;
        }
        // Same split as `lookup`: only the cold, remote-enumerating path pays
@@ -232,6 +234,7 @@ impl Filesystem for ProtonFs {
    /// a blob that is the whole file — so it is served from a worker rather than
    /// stalling every other request on the mount behind it.
    fn open(&self, _req: &Request, ino: INodeNo, flags: OpenFlags, reply: ReplyOpen) {
+        let ino = self.tree(ino);
        if flags.acc_mode() == OpenAccMode::O_RDONLY {
            self.serve_open(ino, flags, reply);
            return;
@@ -253,6 +256,7 @@ impl Filesystem for ProtonFs {
        _lock_owner: Option<LockOwner>,
        reply: ReplyData,
    ) {
+        let ino = self.tree(ino);
        // A file open for writing is served from its handle so reads see the
        // in-flight (possibly unsaved) content: authored bytes come from the
        // scratch file, untouched bytes from the base.
@@ -290,7 +294,7 @@ impl Filesystem for ProtonFs {
            }
            return;
        }
-        let (uid, mtime, fsize, is_video) = {
+        let (uid, mtime, fsize, provisional, is_video) = {
            let st = self.core.state();
            match st.entries.get(&ino.0) {
                Some(e) if e.node.is_file() => {
@@ -300,14 +304,24 @@ impl Filesystem for ProtonFs {
                    };
                    let is_video =
                        PhotoKind::classify(Some(&e.node.name), media_type) == PhotoKind::Video;
-                    let fsize = self
-                        .core
-                        .pending
-                        .lock()
-                        .get(&e.uid)
-                        .map(|p| p.meta.len)
-                        .unwrap_or_else(|| node_size(&e.node));
-                    (e.uid.clone(), e.node.modification_time, fsize, is_video)
+                    let queued = self.core.pending.lock().get(&e.uid).map(|p| p.meta.len);
+                    // Still the cheap enumeration's ciphertext size (B12).
+                    let provisional = queued.is_none()
+                        && matches!(
+                            &e.node.kind,
+                            NodeKind::File {
+                                claimed_size: None,
+                                ..
+                            }
+                        );
+                    let fsize = queued.unwrap_or_else(|| node_size(&e.node));
+                    (
+                        e.uid.clone(),
+                        e.node.modification_time,
+                        fsize,
+                        provisional,
+                        is_video,
+                    )
                }
                Some(_) => {
                    reply.error(Errno::EISDIR);
@@ -330,6 +344,13 @@ impl Filesystem for ProtonFs {
        // races with nothing. FUSE does not require replies in request order.
        let core = self.core.clone();
        self.core.workers.run(Lane::Transfer, "read", move || {
+            // The revision disagrees with a provisional size, and B84 fails
+            // such a read outright, so settle the size first. On the network,
+            // hence here and not above (bugs.md B100).
+            let fsize = match provisional {
+                true => core.resolve_provisional_size(ino.0, &uid).unwrap_or(fsize),
+                false => fsize,
+            };
            match core.read_range(&uid, mtime, fsize, offset, size as u64, cache_blocks) {
                Ok(bytes) => reply.data(&bytes),
                Err(e) => reply.error(e),
@@ -347,7 +368,7 @@ impl Filesystem for ProtonFs {
        _flags: i32,
        reply: ReplyCreate,
    ) {
-        let parent = parent.0;
+        let parent = self.tree(parent).0;
        if let Err(error) = self.core.require_writable(parent) {
            reply.error(error);
            return;
@@ -383,6 +404,7 @@ impl Filesystem for ProtonFs {
        _lock_owner: Option<LockOwner>,
        reply: ReplyWrite,
    ) {
+        let ino = self.tree(ino);
        if let Err(error) = self.core.require_writable(ino.0) {
            reply.error(error);
            return;
@@ -425,10 +447,7 @@ impl Filesystem for ProtonFs {
                reply.error(Errno::EBADF);
                return;
            };
-            let end = offset + data.len() as u64;
-            aw.written.add(offset, end);
-            aw.len = aw.len.max(end);
-            aw.dirty = true;
+            aw.record_write(offset, offset + data.len() as u64);
            let len = aw.len;
            st.set_size(ino.0, len);
            len
@@ -463,6 +482,7 @@ impl Filesystem for ProtonFs {
        _flags: Option<BsdFileFlags>,
        reply: ReplyAttr,
    ) {
+        let ino = self.tree(ino);
        if let Err(error) = self.core.require_writable(ino.0) {
            reply.error(error);
            return;
@@ -530,6 +550,7 @@ impl Filesystem for ProtonFs {
        mode: i32,
        reply: ReplyEmpty,
    ) {
+        let ino = self.tree(ino);
        if let Err(error) = self.core.require_writable(ino.0) {
            reply.error(error);
            return;
@@ -626,16 +647,17 @@ impl Filesystem for ProtonFs {
    fn release(
        &self,
        _req: &Request,
-        _ino: INodeNo,
+        ino: INodeNo,
        fh: FileHandle,
        _flags: OpenFlags,
        _lock_owner: Option<LockOwner>,
        _flush: bool,
        reply: ReplyEmpty,
    ) {
+        let ino = self.tree(ino);
        let (handle, unlinked_uid) = {
            let mut st = self.core.state();
-            let unlinked_uid = release_unlinked_entry(&mut st, _ino.0);
+            let unlinked_uid = release_unlinked_entry(&mut st, ino.0);
            let ino = st.handles.remove(&fh.0);
            let h = ino.and_then(|i| {
                let aw = st.active_writes.get_mut(&i)?;
@@ -666,7 +688,7 @@ impl Filesystem for ProtonFs {
    }

    fn unlink(&self, _req: &Request, parent: INodeNo, name: &OsStr, reply: ReplyEmpty) {
-        let parent = parent.0;
+        let parent = self.tree(parent).0;
        if let Err(error) = self.core.require_writable(parent) {
            reply.error(error);
            return;
@@ -686,7 +708,7 @@ impl Filesystem for ProtonFs {
    }

    fn rmdir(&self, _req: &Request, parent: INodeNo, name: &OsStr, reply: ReplyEmpty) {
-        let parent = parent.0;
+        let parent = self.tree(parent).0;
        if let Err(error) = self.core.require_writable(parent) {
            reply.error(error);
            return;
@@ -715,7 +737,7 @@ impl Filesystem for ProtonFs {
        _umask: u32,
        reply: ReplyEntry,
    ) {
-        let parent = parent.0;
+        let parent = self.tree(parent).0;
        if let Err(error) = self.core.require_writable(parent) {
            reply.error(error);
            return;
@@ -746,8 +768,8 @@ impl Filesystem for ProtonFs {
        flags: RenameFlags,
        reply: ReplyEmpty,
    ) {
-        let parent = parent.0;
-        let newparent = newparent.0;
+        let parent = self.tree(parent).0;
+        let newparent = self.tree(newparent).0;
        if let Err(error) = self
            .core
            .require_writable(parent)
@@ -780,6 +802,7 @@ impl Filesystem for ProtonFs {
    }

    fn access(&self, _req: &Request, ino: INodeNo, mask: AccessFlags, reply: ReplyEmpty) {
+        let ino = self.tree(ino);
        let state = self.core.state();
        let Some(entry) = state.entries.get(&ino.0) else {
            reply.error(Errno::ENOENT);
@@ -793,6 +816,7 @@ impl Filesystem for ProtonFs {
    }

    fn getxattr(&self, _req: &Request, ino: INodeNo, name: &OsStr, size: u32, reply: ReplyXattr) {
+        let ino = self.tree(ino);
        // Always off the dispatch loop: a miss goes to the wire, and a lister
        // that stats a directory issues one of these per file per advertised
        // name — inline, that serialized the whole mount behind ~186 ms of
@@ -805,6 +829,7 @@ impl Filesystem for ProtonFs {
    }

    fn listxattr(&self, _req: &Request, ino: INodeNo, size: u32, reply: ReplyXattr) {
+        let ino = self.tree(ino);
        self.serve_listxattr(ino, size, reply);
    }

@@ -954,6 +979,9 @@ pub struct ProtonFs {
    core: Core,
    uid: u32,
    gid: u32,
+    /// The tree inode of this session's root, which the kernel knows as
+    /// [`ROOT_INO`].
+    root: u64,
 }

 /// How many times a write `open` will re-read its base after a `release`
@@ -994,59 +1022,55 @@ fn build_listing(st: &State, ino: u64) -> DirListing {
 /// The cookie handed back is the index of the *next* entry, so a resumed call
 /// continues exactly where the last one stopped — which is only true because
 /// the listing behind those indexes is a snapshot (bugs.md B43).
-fn reply_listing(listing: &DirListing, offset: u64, mut reply: ReplyDirectory) {
+fn reply_listing(listing: &DirListing, offset: u64, root: u64, mut reply: ReplyDirectory) {
    for (i, (ino, is_dir, name)) in listing.iter().enumerate().skip(offset as usize) {
        let ft = if *is_dir {
            FileType::Directory
        } else {
            FileType::RegularFile
        };
-        if reply.add(INodeNo(*ino), (i + 1) as u64, ft, name) {
+        if reply.add(kernel_ino(root, *ino), (i + 1) as u64, ft, name) {
            break;
        }
    }
    reply.ok();
 }

+/// The inode the kernel knows tree inode `ino` by, in a session rooted at
+/// `root`. The inverse of [`ProtonFs::tree`].
+pub(crate) fn kernel_ino(root: u64, ino: u64) -> INodeNo {
+    INodeNo(if ino == root { ROOT_INO } else { ino })
+}
+
 pub(crate) fn access_allowed(is_dir: bool, access: Access, mask: AccessFlags) -> bool {
    (!mask.contains(AccessFlags::W_OK) || access.writable())
        && (!mask.contains(AccessFlags::X_OK) || is_dir)
 }

 impl ProtonFs {
-    /// Build the filesystem rooted at `root` (the user's My Files folder).
+    /// Build the filesystem rooted at `root` (the user's My Files folder, or
+    /// the folder an on-demand location shows).
    pub(super) fn new(core: Core, root: Node) -> Self {
-        {
-            let mut st = core.state();
-            if let Err(e) = st.db.upsert_node(&root) {
-                warn!(uid = %root.uid, error = %e, "db upsert root failed");
-            }
-            st.by_uid.insert(root.uid.clone(), ROOT_INO);
-            // The filesystem root is always owned — it must never be
-            // classified as a shared root, even when the API returns
-            // membership data (which happens when the owner shares the
-            // folder with someone else).  Clean up any stale share_access
-            // row that a previous downgrade_all_share_access may have
-            // written for this uid, so hydrate_access cannot pick it up.
-            let access = Access::Owner;
-            st.share_access.remove(&root.uid);
-            let _ = st.db.delete_share_access(&root.uid);
-            st.entries.insert(
-                ROOT_INO,
-                Entry {
-                    uid: root.uid.clone(),
-                    parent: ROOT_INO,
-                    node: root,
-                    access,
-                    lookup_count: 1,
-                    open_count: 0,
-                    unlinked: false,
-                },
-            );
-        }
+        let root = core.state().install_root(root);
+        let _ = core.root.set(root);
        // SAFETY: geteuid/getegid are infallible and have no preconditions.
        let (uid, gid) = unsafe { (libc::geteuid(), libc::getegid()) };
-        Self { core, uid, gid }
+        Self {
+            core,
+            uid,
+            gid,
+            root,
+        }
+    }
+
+    /// The tree inode the kernel means by `ino`: this session's root for
+    /// [`ROOT_INO`], and every other inode as it is.
+    fn tree(&self, ino: INodeNo) -> INodeNo {
+        if ino.0 == ROOT_INO {
+            INodeNo(self.root)
+        } else {
+            ino
+        }
    }

    /// The body of [`Filesystem::lookup`], on whichever thread ends up serving it.
@@ -1155,7 +1179,7 @@ impl ProtonFs {
        let st = self.core.state();
        let listing = build_listing(&st, ino);
        drop(st);
-        reply_listing(&listing, offset, reply);
+        reply_listing(&listing, offset, self.root, reply);
    }

    fn attr(&self, ino: u64, node: &Node, access: Access) -> FileAttr {
@@ -1168,7 +1192,7 @@ impl ProtonFs {
        let mtime = unix_secs(node.modification_time);
        let crtime = unix_secs(node.creation_time);
        FileAttr {
-            ino: INodeNo(ino),
+            ino: kernel_ino(self.root, ino),
            size,
            blocks: size.div_ceil(512),
            atime: mtime,
@@ -1193,7 +1217,7 @@ impl ProtonFs {
    /// open.
    fn serve_open(&self, ino: INodeNo, flags: OpenFlags, reply: ReplyOpen) {
        let write_requested = flags.acc_mode() != OpenAccMode::O_RDONLY;
-        let (uid, base_mtime, base_size, base_revision_id) = {
+        let (uid, base_mtime, base_size, provisional, base_revision_id) = {
            let mut st = self.core.state();
            match st.entries.get_mut(&ino.0) {
                Some(e) if e.node.is_file() => {
@@ -1206,6 +1230,14 @@ impl ProtonFs {
                        e.uid.clone(),
                        e.node.modification_time,
                        node_size(&e.node),
+                        // Still the cheap enumeration's ciphertext size (B12).
+                        matches!(
+                            &e.node.kind,
+                            NodeKind::File {
+                                claimed_size: None,
+                                ..
+                            }
+                        ),
                        node_revision_id(&e.node),
                    )
                }
@@ -1251,6 +1283,21 @@ impl ProtonFs {
        // `reply` is consumed by whichever arm answers, so the loop yields an
        // outcome and the answer is sent once, after it.
        let outcome = 'install: {
+            // The handle starts at the base's size. A provisional one is the
+            // ciphertext size, so the file would grow by the encryption overhead
+            // and reading the base would fail (bugs.md B100). A queued revision
+            // stamps a real size, so this only goes to the network for a file
+            // the listing has not sized yet.
+            let base_size = match provisional && self.core.pending_blob(&uid).is_none() {
+                false => base_size,
+                true => match self.core.resolve_provisional_size(ino.0, &uid) {
+                    Some(size) => size,
+                    None => {
+                        error!(%uid, "could not settle the size of the base for a write open");
+                        break 'install Err(Errno::EIO);
+                    }
+                },
+            };
            for attempt in 0..OPEN_BASE_ATTEMPTS {
                let pending_base = self.core.pending.lock().get(&uid).cloned();
                if pending_base.as_ref().is_some_and(|p| !p.meta.complete) {
@@ -1398,7 +1445,7 @@ impl ProtonFs {
            len,
            base_size,
            base_mtime,
-            complete: authored == [(0, len)],
+            complete: StagedWrite::covers(&authored, len),
            authored,
            based_on: self
                .core
@@ -1427,6 +1474,12 @@ impl ProtonFs {
            return;
        }
        if let Err(e) = self.core.ensure_children(parent) {
+            // The parent was looked up a moment ago, so ENOENT here means it
+            // left the tree in between. Log it: the caller only sees "no such
+            // file" on a create.
+            if e == Errno::ENOENT {
+                warn!(parent, name, "create: the parent folder is no longer known");
+            }
            reply.error(e);
            return;
        }
@@ -1435,6 +1488,10 @@ impl ProtonFs {
            match st.entries.get(&parent) {
                Some(e) => e.uid.clone(),
                None => {
+                    warn!(
+                        parent,
+                        name, "create: the parent folder left the tree during its listing"
+                    );
                    reply.error(Errno::ENOENT);
                    return;
                }
@@ -1454,67 +1511,58 @@ impl ProtonFs {
        //
        // A parent that is itself still queued forces the same path even when we
        // are online: the API has no folder to put this in yet.
-        let node =
-            if !transient && self.core.online.load(Ordering::Relaxed) && !is_local_uid(&parent_uid)
-            {
-                if let Err(error) = self.core.require_uid_writable(&parent_uid) {
-                    reply.error(error);
+        //
+        // A create that set out online and lost the network on the way lands in
+        // the queue too, so a Wi-Fi drop costs the caller a wait, never an EIO.
+        let minted = if !transient && self.core.is_online() && !is_local_uid(&parent_uid) {
+            if let Err(error) = self.core.require_uid_writable(&parent_uid) {
+                reply.error(error);
+                return;
+            }
+            // Create an empty file on the remote so it has a real uid immediately;
+            // written bytes are buffered and sealed as a new revision on close.
+            match self.core.block_on_bounded(self.core.drive.upload_file(
+                &parent_uid,
+                name,
+                media_type_for(name),
+                b"",
+            )) {
+                // A file that exists remotely but could not be read back is
+                // queued, and the queued create finds it by name and adopts it.
+                Ok(new_uid) => self.core.fetch_minted_node(&new_uid, name),
+                Err(e) if self.core.lost_link(&e, "create") => None,
+                Err(e) => {
+                    error!(%parent_uid, name, error = %e, "create file failed");
+                    reply.error(Errno::EIO);
                    return;
                }
-                // Create an empty file on the remote so it has a real uid immediately;
-                // written bytes are buffered and sealed as a new revision on close.
-                let new_uid = match self.core.rt.block_on(self.core.client.upload_file(
-                    &parent_uid,
-                    name,
-                    media_type_for(name),
-                    b"",
-                )) {
-                    Ok(u) => u,
-                    Err(e) => {
-                        error!(%parent_uid, name, error = %e, "create file failed");
-                        reply.error(Errno::EIO);
-                        return;
-                    }
-                };
-                match self.core.fetch_node(&new_uid) {
-                    Ok(n) => n,
-                    Err(e) => {
-                        reply.error(e);
-                        return;
-                    }
+            }
+        } else {
+            None
+        };
+        let node = match minted {
+            Some(node) => node,
+            None => match self
+                .core
+                .queue_local_node(&parent_uid, name, false, transient)
+            {
+                Ok(n) => n,
+                Err(e) => {
+                    reply.error(e);
+                    return;
                }
-            } else {
-                match self
-                    .core
-                    .queue_local_node(&parent_uid, name, false, transient)
-                {
-                    Ok(n) => n,
-                    Err(e) => {
-                        reply.error(e);
-                        return;
-                    }
-                }
-            };
-        let new_uid = node.uid.clone();
-        // The base this handle writes over is the node as it actually exists —
-        // the empty file the server just minted — so its modification time comes
-        // from the node, never from the local clock. `queue_revision` turns this
-        // into `StagedWrite::based_on` and the drain compares that against the
-        // remote: a `now_secs()` here differs from the server's stamp by however
-        // long the create round-trip took, so the first write to a brand-new file
-        // conflicts with its own create whenever the second happens to tick in
-        // between.
-        let base_mtime = node.modification_time;
+            },
+        };
        let (file, path) = match self.core.cache.create_scratch() {
            Ok(x) => x,
            Err(e) => {
-                error!(%new_uid, error = %e, "create scratch file failed");
+                error!(uid = %node.uid, error = %e, "create scratch file failed");
                reply.error(Errno::EIO);
                return;
            }
        };
        let mut st = self.core.state();
-        let ino = st.intern(parent, node);
+        let ino = st.intern(parent, node.clone());
        if let Some(entry) = st.entries.get_mut(&ino) {
            entry.open_count = entry.open_count.saturating_add(1);
        }
@@ -1525,23 +1573,10 @@ impl ProtonFs {
        }
        let fh = st.next_fh;
        st.next_fh += 1;
-        let aw = st.active_writes.entry(ino).or_insert_with(|| {
-            // A brand-new file: empty base, everything written is authored.
-            WriteHandle {
-                ino,
-                uid: new_uid,
-                file: Arc::new(file),
-                path,
-                written: Intervals::default(),
-                len: 0,
-                base_size: 0,
-                base_mtime,
-                // A brand-new file has no sealed remote revision to conflict with.
-                base_revision_id: None,
-                dirty: false,
-                open_count: 0,
-            }
-        });
+        let aw = st
+            .active_writes
+            .entry(ino)
+            .or_insert_with(|| WriteHandle::created(ino, &node, file, path));
        aw.open_count += 1;
        st.handles.insert(fh, ino);
        let entry = st.entries.get(&ino).unwrap();
@@ -1584,39 +1619,36 @@ impl ProtonFs {
        // As in `create`: offline — or under a parent that is itself still
        // queued — the folder becomes a placeholder that the drain turns into a
        // real one (offline.md Phase 3b).
-        let node = if self.core.online.load(Ordering::Relaxed) && !is_local_uid(&parent_uid) {
+        // Losing the network on the way queues it the same way.
+        let minted = if self.core.is_online() && !is_local_uid(&parent_uid) {
            if let Err(error) = self.core.require_uid_writable(&parent_uid) {
                reply.error(error);
                return;
            }
-            let new_uid =
-                match self
-                    .core
-                    .rt
-                    .block_on(self.core.client.create_folder(&parent_uid, name, now))
-                {
-                    Ok(u) => u,
-                    Err(e) => {
-                        error!(%parent_uid, name, error = %e, "create folder failed");
-                        reply.error(Errno::EIO);
-                        return;
-                    }
-                };
-            match self.core.fetch_node(&new_uid) {
-                Ok(n) => n,
+            match self
+                .core
+                .block_on_bounded(self.core.drive.create_folder(&parent_uid, name, now))
+            {
+                Ok(new_uid) => self.core.fetch_minted_node(&new_uid, name),
+                Err(e) if self.core.lost_link(&e, "mkdir") => None,
                Err(e) => {
-                    reply.error(e);
+                    error!(%parent_uid, name, error = %e, "create folder failed");
+                    reply.error(Errno::EIO);
                    return;
                }
            }
        } else {
-            match self.core.queue_local_node(&parent_uid, name, true, false) {
+            None
+        };
+        let node = match minted {
+            Some(node) => node,
+            None => match self.core.queue_local_node(&parent_uid, name, true, false) {
                Ok(n) => n,
                Err(e) => {
                    reply.error(e);
                    return;
                }
-            }
+            },
        };
        let mut st = self.core.state();
        let local = is_local_uid(&node.uid);
@@ -1706,12 +1738,18 @@ impl ProtonFs {
        if let Some(uid) = unlinked_uid
            && release_can_discard_unlinked(&self.core.db, &uid)
        {
+            // Ops withdrawn at unlink left the bytes this handle read behind,
+            // owned by no op any more; they go with the last handle.
+            let withdrawn = self.core.pending_blob(&uid);
            if let Err(error) = self.core.discard_queued_ops(&uid) {
                warn!(%uid, ?error, "queued-op cleanup failed; retaining unlinked state");
            } else {
                if let Err(error) = self.core.db.delete_node(&uid) {
                    warn!(%uid, %error, "deleting released unlinked node state failed");
                }
+                if let Some(blob) = withdrawn {
+                    self.core.cache.discard_staged(&blob);
+                }
                self.core.cache.evict(&uid);
                self.core.evict_reader(&uid);
            }
@@ -1916,12 +1954,14 @@ impl ProtonFs {
                // now and this handle's is stale. A retry resolves it.
                Ok(false) => {
                    warn!(%uid, name, newname, "queued create vanished under a rename");
-                    self.core.restore_replaced(victim.as_ref(), newname);
+                    self.core
+                        .restore_replaced(victim.as_ref(), &new_parent_uid, newname);
                    reply.error(Errno::EBUSY);
                }
                Err(e) => {
                    error!(%uid, error = %e, "rewriting a queued create's target failed");
-                    self.core.restore_replaced(victim.as_ref(), newname);
+                    self.core
+                        .restore_replaced(victim.as_ref(), &new_parent_uid, newname);
                    reply.error(Errno::EIO);
                }
            }
@@ -1932,12 +1972,11 @@ impl ProtonFs {
        // take the synchronous path, so a genuine API refusal (permissions, a
        // name clash) surfaces to the caller instead of becoming a queued op
        // that can only ever conflict.
-        if rename_needs_queue(
-            self.core.online.load(Ordering::Relaxed),
-            is_local_uid(&new_parent_uid),
-            newparent != parent,
-            newname != name,
-        ) {
+        // The queued rename, as a closure: the network going away under the
+        // synchronous path below lands here too, with whatever half already
+        // reached Drive. The op records the end state, so the drain finishes
+        // the rest.
+        let queue_it = |reply: ReplyEmpty| {
            let queued = if replacement_authorized {
                self.core.queue_rename_authorized(
                    ino,
@@ -1965,23 +2004,30 @@ impl ProtonFs {
                    // and retain an empty destination readdir page.
                    reply.ok();
                    if let Some(notifier) = self.core.notifier.get() {
-                        let _ = notifier.inval_entry(INodeNo(parent), OsStr::new(&name));
-                        let _ = notifier.inval_entry(INodeNo(newparent), OsStr::new(&newname));
-                        let _ = notifier.inval_inode(INodeNo(parent), 0, 0);
+                        let _ = notifier.inval_entry(parent, OsStr::new(&name));
+                        let _ = notifier.inval_entry(newparent, OsStr::new(&newname));
+                        let _ = notifier.inval_inode(parent);
                        if newparent != parent {
-                            let _ = notifier.inval_inode(INodeNo(newparent), 0, 0);
+                            let _ = notifier.inval_inode(newparent);
                        }
                    }
                }
                Err(e) => {
-                    self.core.restore_replaced(victim.as_ref(), newname);
+                    self.core
+                        .restore_replaced(victim.as_ref(), &new_parent_uid, newname);
                    reply.error(e);
                }
            }
+        };
+        if rename_needs_queue(
+            self.core.is_online(),
+            is_local_uid(&new_parent_uid),
+            newparent != parent,
+            newname != name,
+        ) {
+            queue_it(reply);
            return;
        }
-        // Rename first if both halves change. Moving first makes the encrypted
-        // name requirements stale and repeatedly failed with InvalidRequirements.
        // A failure past this point has already trashed any node the rename was
        // replacing, so put it back rather than leaving the caller with neither
        // the source moved nor the destination intact.
@@ -1991,64 +2037,37 @@ impl ProtonFs {
            &old_parent_uid,
            &new_parent_uid,
        ) {
-            self.core.restore_replaced(victim.as_ref(), newname);
+            self.core
+                .restore_replaced(victim.as_ref(), &new_parent_uid, newname);
            reply.error(error);
            return;
        }
-        if newname != name
-            && let Err(e) = self
-                .core
-                .rt
-                .block_on(self.core.client.rename_node(&uid, newname, None))
-        {
+        // A move that also renames is one request, so the name only has to be
+        // free in the destination, and the reply never stands for half of it.
+        let renamed = if newparent != parent {
+            let target = (newname != name).then_some(newname);
+            self.core.move_rename_remote(&uid, &new_parent_uid, target)
+        } else if newname != name {
+            self.core.rename_remote(&uid, newname)
+        } else {
+            Ok(())
+        };
+        if let Err(e) = renamed {
+            if self.core.lost_link(&e, "rename") {
+                queue_it(reply);
+                return;
+            }
            error!(%uid, error = %e, "rename failed");
-            self.core.restore_replaced(victim.as_ref(), newname);
+            self.core
+                .restore_replaced(victim.as_ref(), &new_parent_uid, newname);
            reply.error(Errno::EIO);
            return;
        }
-        if newparent != parent {
-            let mut attempts = 0u32;
-            let moved = loop {
-                match self
-                    .core
-                    .rt
-                    .block_on(self.core.client.move_node(&uid, &new_parent_uid))
-                {
-                    Ok(()) => break Ok(()),
-                    Err(e)
-                        if newname != name
-                            && api_code(&e) == Some(ResponseCode::InvalidRequirements)
-                            && attempts < 20 =>
-                    {
-                        attempts += 1;
-                        // Requirement propagation routinely takes longer than
-                        // three seconds. Keep a bounded ten-second window; a
-                        // successful POSIX reply must mean both remote halves
-                        // landed, not merely that the second half was queued.
-                        std::thread::sleep(Duration::from_millis(500));
-                    }
-                    Err(e) => break Err(e),
-                }
-            };
-            if let Err(e) = moved {
-                error!(%uid, attempts, error = %e, "move after rename failed");
-                // The rename half landed in the source directory.
-                let mut state = self.core.state();
-                let old_parent_uid = state
-                    .entries
-                    .get(&parent)
-                    .map(|entry| entry.uid.clone())
-                    .unwrap_or_else(|| uid.clone());
-                state.rename_in_place(ino, parent, &old_parent_uid, newname);
-                drop(state);
-                self.core.restore_replaced(victim.as_ref(), newname);
-                reply.error(Errno::EIO);
-                return;
-            }
-        }
+        // Through the guard, so the database has both folders unlisted before
+        // the reply. The next lookup rebuilds a folder still marked listed from
+        // the database, which did not have the move yet (docs/BUGS.md B135).
        self.core
-            .state
-            .lock()
+            .state()
            .relocate(ino, parent, newparent, &new_parent_uid, newname);
        reply.ok();
    }
@@ -2092,7 +2111,12 @@ impl ProtonFs {
        // it just means its queued creation is no longer wanted. This works
        // offline, which the remote path below cannot (offline.md Phase 3b).
        if is_local_uid(&uid) {
-            if !open_now && let Err(error) = self.core.discard_queued_ops(&uid) {
+            let dropped = if open_now {
+                self.core.withdraw_queued_ops(&uid)
+            } else {
+                self.core.discard_queued_ops(&uid)
+            };
+            if let Err(error) = dropped {
                reply.error(error);
                return;
            }
@@ -2103,12 +2127,14 @@ impl ProtonFs {
        }
        // Offline: queue it. Trashing is the one mutation a user expects to work
        // regardless — the file is gone from their point of view the moment the
-        // command returns (offline.md Phase 3b).
-        if !self.core.online.load(Ordering::Relaxed) {
-            match self.core.queue_trash(&uid, name) {
-                Ok(()) => reply.ok(),
-                Err(e) => reply.error(e),
-            }
+        // command returns (offline.md Phase 3b). The same when the network goes
+        // away under the remote call below.
+        let queue_it = |reply: ReplyEmpty| match self.core.queue_trash(&uid, name) {
+            Ok(()) => reply.ok(),
+            Err(e) => reply.error(e),
+        };
+        if !self.core.is_online() {
+            queue_it(reply);
            return;
        }
        if let Err(e) = self.core.require_uid_writable(&uid) {
@@ -2117,10 +2143,13 @@ impl ProtonFs {
        }
        if let Err(e) = self
            .core
-            .rt
-            .block_on(self.core.client.trash_nodes(std::slice::from_ref(&uid)))
+            .block_on_bounded(self.core.drive.trash_nodes(std::slice::from_ref(&uid)))
            .and_then(batch::into_unit)
        {
+            if self.core.lost_link(&e, "trash") {
+                queue_it(reply);
+                return;
+            }
            error!(%uid, error = %e, "trash failed");
            self.core
                .log_activity(ActivityKind::Trash, name, e.to_string(), false);
@@ -2131,7 +2160,13 @@ impl ProtonFs {
        // Otherwise an EIO response still made the path disappear locally.
        self.core.hidden.lock().insert(uid.clone());
        self.core.state().forget_or_unlink(&uid);
-        if !open_now {
+        if open_now {
+            // The open handle keeps the staged bytes; the drain must not send
+            // them to a node that is already in the trash (docs/BUGS.md B106).
+            if let Err(error) = self.core.withdraw_queued_ops(&uid) {
+                warn!(%uid, ?error, "remote trash landed but queued-op cleanup failed");
+            }
+        } else {
            if let Err(error) = self.core.discard_queued_ops(&uid) {
                warn!(%uid, ?error, "remote trash landed but queued-op cleanup failed");
            }
@@ -0,0 +1,316 @@
+//! Noticing that the network went away mid-session, and that it came back.
+//!
+//! The mount used to learn it was offline only at startup: a daemon that had
+//! connected once kept `online` true for the rest of its life, so a Wi-Fi drop
+//! turned every create, mkdir, delete and rename into a two-minute wait for an
+//! `EIO`, while the queue that exists for exactly this sat unused. Now any
+//! remote call a handler waits on reports a failure to reach Proton through
+//! [`Core::lost_link`], which flips the mount offline; the handler then takes its
+//! queued path, and the probe thread here flips it back when Proton answers.
+
+use std::future::Future;
+use std::sync::atomic::Ordering;
+use std::time::{Duration, Instant};
+
+use parking_lot::{Condvar, Mutex};
+use proton_drive_rs::proton_sdk::api::ResponseCode;
+use proton_drive_rs::proton_sdk::error::{ProtonApiError, ProtonError};
+use tracing::{debug, info, warn};
+
+use crate::{Core, ONLINE_PROBE_MAX, ONLINE_PROBE_MIN};
+
+/// How long a remote call a FUSE handler is waiting on may take before the link
+/// is treated as down.
+///
+/// The SDK's own budget for one request is four attempts of up to 30 seconds
+/// each, so a dead link held the caller for about two minutes. A metadata call
+/// that has had no answer in 20 seconds is not going to be one the user wants to
+/// keep waiting for; queueing the change is the better answer.
+pub(crate) const INTERACTIVE_CALL_TIMEOUT: Duration = Duration::from_secs(20);
+
+/// How long one probe may wait for an answer. A probe is a single small request,
+/// and a probe stuck in the SDK's retry budget would delay noticing the link is
+/// back by as long as it waits.
+const PROBE_TIMEOUT: Duration = Duration::from_secs(10);
+
+/// First delay between probes after a drop seen mid-session, and the ceiling it
+/// doubles to while the outage is young. A blip should end in seconds, not in
+/// the minutes [`ONLINE_PROBE_MAX`] allows.
+const PROBE_AFTER_DROP: Duration = Duration::from_secs(2);
+const PROBE_YOUNG_MAX: Duration = Duration::from_secs(30);
+/// How long an outage counts as young. Past it the probe backs off to
+/// [`ONLINE_PROBE_MAX`], because a laptop can sit offline for days and each
+/// probe is a real API round trip.
+const YOUNG_OUTAGE: Duration = Duration::from_secs(10 * 60);
+
+/// How often the idle probe thread checks for teardown while the link is up.
+const IDLE_CHECK: Duration = Duration::from_secs(1);
+
+/// The shared half of the online flag: when the link went down, and a condvar
+/// that fires on every change so waiters need not poll.
+#[derive(Default)]
+pub(crate) struct Link {
+    lost_at: Mutex<Option<Instant>>,
+    changed: Condvar,
+    /// Folders listed from the DB alone while offline, to relist once back.
+    pub(crate) stale_listings: Mutex<std::collections::HashSet<u64>>,
+}
+
+/// Whether a failed call failed because Proton could not be reached, rather
+/// than because it answered and refused.
+///
+/// A transport error is the network. So is a request timeout: the SDK reports
+/// Proton's own "try again" codes that way, and [`no_answer`] reports our
+/// deadline that way. Anything else Proton actually said, and says again on a
+/// retry, so it must reach the caller rather than be queued.
+pub(crate) fn is_network_error(e: &ProtonError) -> bool {
+    match e {
+        ProtonError::Transport(_) => true,
+        ProtonError::Api(api) => {
+            matches!(
+                api.code,
+                ResponseCode::RequestTimeout | ResponseCode::Timeout
+            )
+        }
+        _ => false,
+    }
+}
+
+/// The error a call reports when it runs past `after` without an answer.
+pub(crate) fn no_answer(after: Duration) -> ProtonError {
+    ProtonError::Api(ProtonApiError {
+        code: ResponseCode::RequestTimeout,
+        http_status: 408,
+        message: format!("no answer within {}s", after.as_secs()),
+        details: None,
+    })
+}
+
+/// Run a remote call, giving up after [`INTERACTIVE_CALL_TIMEOUT`].
+pub(crate) async fn bounded<T>(
+    call: impl Future<Output = Result<T, ProtonError>>,
+) -> Result<T, ProtonError> {
+    match tokio::time::timeout(INTERACTIVE_CALL_TIMEOUT, call).await {
+        Ok(result) => result,
+        Err(_) => Err(no_answer(INTERACTIVE_CALL_TIMEOUT)),
+    }
+}
+
+/// The next delay between probes, given the current one and how long the
+/// outage has lasted.
+fn next_probe_delay(delay: Duration, outage: Duration) -> Duration {
+    let cap = if outage < YOUNG_OUTAGE {
+        PROBE_YOUNG_MAX
+    } else {
+        ONLINE_PROBE_MAX
+    };
+    (delay * 2).min(cap)
+}
+
+impl Core {
+    /// Whether the mount currently believes Proton is reachable.
+    pub(crate) fn is_online(&self) -> bool {
+        self.online.load(Ordering::Relaxed)
+    }
+
+    /// Run a remote call a caller is waiting on, giving up after
+    /// [`INTERACTIVE_CALL_TIMEOUT`]. The timer is built inside the runtime: a
+    /// FUSE worker has no reactor of its own.
+    pub(crate) fn block_on_bounded<T>(
+        &self,
+        call: impl Future<Output = Result<T, ProtonError>>,
+    ) -> Result<T, ProtonError> {
+        self.rt.block_on(bounded(call))
+    }
+
+    /// Report a failed remote call. Returns whether it failed for want of a
+    /// network, in which case the mount is now offline and the caller should
+    /// take its queued path instead of failing.
+    pub(crate) fn lost_link(&self, e: &ProtonError, what: &str) -> bool {
+        if !is_network_error(e) {
+            return false;
+        }
+        self.mark_offline(what, e);
+        true
+    }
+
+    /// Flip the mount offline and wake the probe. Only the first caller of an
+    /// outage logs it; the rest are the same outage.
+    pub(crate) fn mark_offline(&self, what: &str, error: &dyn std::fmt::Display) {
+        let mut lost_at = self.link.lost_at.lock();
+        if self.online.swap(false, Ordering::Relaxed) {
+            *lost_at = Some(Instant::now());
+            warn!(during = what, %error,
+                  "lost the connection to Proton; queueing changes until it returns");
+            self.link.changed.notify_all();
+        }
+    }
+
+    /// Flip the mount back online, wake everything waiting for it, and let the
+    /// queue drain.
+    fn mark_online(&self) {
+        {
+            let mut lost_at = self.link.lost_at.lock();
+            self.online.store(true, Ordering::Relaxed);
+            match lost_at.take() {
+                Some(since) => {
+                    info!(
+                        offline_secs = since.elapsed().as_secs(),
+                        "connection to Proton is back"
+                    )
+                }
+                None => info!("back online"),
+            }
+            self.link.changed.notify_all();
+        }
+        self.relist_offline_listings();
+        // Anything written while offline is queued and waiting on exactly this,
+        // including ops that failed on the way down and are sitting out a
+        // backoff sized for a server that keeps refusing.
+        if let Err(e) = self.db.retry_failed_ops_now(crate::now_millis()) {
+            warn!(error = %e, "moving backed-off ops up after a reconnect failed");
+        }
+        self.wake_drain();
+    }
+
+    /// Wait up to `budget` for the link to come back. Returns whether it is up.
+    pub(crate) fn wait_online(&self, budget: Duration) -> bool {
+        let deadline = Instant::now() + budget;
+        let mut lost_at = self.link.lost_at.lock();
+        while !self.is_online() {
+            if self.shutdown.is_stopping()
+                || self
+                    .link
+                    .changed
+                    .wait_until(&mut lost_at, deadline)
+                    .timed_out()
+            {
+                return self.is_online();
+            }
+        }
+        true
+    }
+
+    /// Wait out `interval` before a background poll of Proton, and while the
+    /// link is down, until it is back. Returns as soon as it comes back, so the
+    /// poll catches up on what changed during the outage at once instead of
+    /// one interval later. A poll into a dead link would only wait out the
+    /// SDK's retries and fail.
+    pub(crate) async fn next_poll(&self, interval: Duration) {
+        let due = Instant::now() + interval;
+        let mut was_offline = false;
+        loop {
+            if !self.is_online() {
+                was_offline = true;
+            } else if was_offline || Instant::now() >= due {
+                return;
+            }
+            tokio::time::sleep(IDLE_CHECK).await;
+        }
+    }
+
+    /// Watch the link for the life of the mount: sleep while it is up, and
+    /// probe it back while it is down (offline.md Phase 1).
+    ///
+    /// A mount that started from the cache is down from the first moment; one
+    /// that started online goes down when [`Core::mark_offline`] says so.
+    pub(crate) fn run_online_probe(&self) {
+        // Only an offline start never had a chance to repair its share id.
+        let mut repair_share_id = !self.is_online();
+        loop {
+            {
+                let mut lost_at = self.link.lost_at.lock();
+                while self.is_online() {
+                    if self.shutdown.is_stopping() {
+                        return;
+                    }
+                    self.link.changed.wait_for(&mut lost_at, IDLE_CHECK);
+                }
+            }
+            if !self.probe_until_online() {
+                return;
+            }
+            if std::mem::take(&mut repair_share_id) {
+                self.repair_primary_share_id(&self.primary_root_uid);
+            }
+        }
+    }
+
+    /// Probe until Proton answers, then flip the mount online. Returns `false`
+    /// if the daemon is stopping.
+    fn probe_until_online(&self) -> bool {
+        let started = self.link.lost_at.lock().unwrap_or_else(Instant::now);
+        let mut delay = if started.elapsed() < YOUNG_OUTAGE {
+            PROBE_AFTER_DROP
+        } else {
+            ONLINE_PROBE_MIN
+        };
+        loop {
+            if !self.shutdown.sleep(delay) {
+                return false;
+            }
+            let probe = self.rt.block_on(async {
+                match tokio::time::timeout(PROBE_TIMEOUT, self.drive.get_my_files_folder()).await {
+                    Ok(result) => result,
+                    Err(_) => Err(no_answer(PROBE_TIMEOUT)),
+                }
+            });
+            match probe {
+                Ok(root) => {
+                    {
+                        let root_ino = self.root_ino();
+                        let mut st = self.state();
+                        if let Some(e) = st.entries.get_mut(&root_ino) {
+                            e.node = root.clone();
+                        }
+                    }
+                    if let Err(e) = self.db.upsert_node(&root) {
+                        warn!(error = %e, "refresh root after reconnect failed");
+                    }
+                    self.mark_online();
+                    return true;
+                }
+                Err(e) => {
+                    debug!(error = %e, ?delay, "online probe failed; still offline");
+                    delay = next_probe_delay(delay, started.elapsed());
+                }
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn api(code: ResponseCode) -> ProtonError {
+        ProtonError::Api(ProtonApiError {
+            code,
+            http_status: 422,
+            message: String::new(),
+            details: None,
+        })
+    }
+
+    #[test]
+    fn only_an_unanswered_call_counts_as_a_lost_link() {
+        assert!(is_network_error(&no_answer(INTERACTIVE_CALL_TIMEOUT)));
+        assert!(is_network_error(&api(ResponseCode::Timeout)));
+        assert!(!is_network_error(&api(ResponseCode::AlreadyExists)));
+        assert!(!is_network_error(&api(ResponseCode::InvalidRequirements)));
+        assert!(!is_network_error(&ProtonError::invalid_operation("bug")));
+    }
+
+    #[test]
+    fn a_young_outage_is_probed_often_and_an_old_one_rarely() {
+        let young = Duration::from_secs(60);
+        let old = YOUNG_OUTAGE + Duration::from_secs(1);
+        assert_eq!(
+            next_probe_delay(PROBE_AFTER_DROP, young),
+            2 * PROBE_AFTER_DROP
+        );
+        assert_eq!(next_probe_delay(PROBE_YOUNG_MAX, young), PROBE_YOUNG_MAX);
+        assert_eq!(next_probe_delay(PROBE_YOUNG_MAX, old), 2 * PROBE_YOUNG_MAX);
+        assert_eq!(next_probe_delay(ONLINE_PROBE_MAX, old), ONLINE_PROBE_MAX);
+    }
+}
@@ -207,11 +207,11 @@ const ROOT_UID_KEY: &str = "root_uid";
 /// means an empty tree, and mounting that would show the user an empty Drive
 /// rather than an honest error.
 fn fetch_or_recall_root(
-    client: &ProtonDriveClient,
+    drive: &dyn DriveApi,
    rt: &tokio::runtime::Handle,
    db: &Db,
 ) -> std::io::Result<(Node, bool)> {
-    let err = match rt.block_on(client.get_my_files_folder()) {
+    let err = match rt.block_on(drive.get_my_files_folder()) {
        Ok(root) => {
            if let Err(e) = db.set_state_str(ROOT_UID_KEY, &root.uid.to_string()) {
                warn!(error = %e, "persist root uid failed");
@@ -241,6 +241,9 @@ pub struct MountOptions {
    pub username: String,
    /// What the background conflict sweep may do. See `docs/BUGS.md` B71.
    pub sweep_mode: SweepMode,
+    /// Upload and download caps in bytes per second (`0` = no cap).
+    pub upload_limit: u64,
+    pub download_limit: u64,
 }

 /// Spawn one FUSE session rooted at an arbitrary remote node.
@@ -273,13 +276,14 @@ pub(super) fn spawn_session(
    info!(mountpoint = %mountpoint.display(), "mounting Proton Drive location");
    let fs = ProtonFs::new(core.clone(), root);
    if core.primary {
-        // Only My Files rehydrates the daemon-wide node cache. A secondary
-        // inode space is rooted at one device subtree and must not import every
-        // unrelated persisted node.
+        // Only My Files rehydrates the daemon-wide node cache, once. A
+        // secondary mount shares the tree it fills.
        core.hydrate();
    }
    let session = Session::new(fs, mountpoint, &config)?.spawn()?;
-    let _ = core.notifier.set(session.notifier());
+    let _ = core
+        .notifier
+        .set(KernelChannel::new(session.notifier(), core.root_ino()));
    core.session_live.store(true, Ordering::Release);
    Ok(session)
 }
@@ -336,15 +340,56 @@ pub fn mount(
    control_socket: &Path,
    db: Arc<Db>,
    options: MountOptions,
+) -> std::io::Result<MountOutcome> {
+    let drive = Arc::new(client.clone());
+    mount_with(
+        client,
+        drive,
+        rt,
+        mountpoint,
+        cache,
+        control_socket,
+        db,
+        options,
+        Host::Daemon,
+    )
+}
+
+/// What a mount runs in.
+pub(crate) enum Host {
+    /// The daemon: stopped by SIGTERM or SIGINT, and indexing the user's home
+    /// for the launcher prompt.
+    Daemon,
+    /// One of several simulated daemons in a test process (`sim`): stopped by
+    /// a message on this channel, and with no home to index.
+    #[cfg(test)]
+    Simulation(std::sync::mpsc::Receiver<()>),
+}
+
+/// [`mount`], reaching Drive through `drive` and hosted by `host`; `client`
+/// serves only what [`DriveApi`] does not cover.
+#[allow(clippy::too_many_arguments)]
+pub(crate) fn mount_with(
+    client: ProtonDriveClient,
+    drive: Arc<dyn DriveApi>,
+    rt: tokio::runtime::Handle,
+    mountpoint: &Path,
+    cache: ContentCache,
+    control_socket: &Path,
+    db: Arc<Db>,
+    options: MountOptions,
+    host: Host,
 ) -> std::io::Result<MountOutcome> {
    let MountOptions {
        username,
        sweep_mode,
+        upload_limit,
+        download_limit,
    } = options;
    // Start the uptime clock here rather than at the first `pdfs diagnostics`,
    // so the age it reports is the daemon's own.
    super::diagnostics::start_clock();
-    let (root, online) = fetch_or_recall_root(&client, &rt, &db)?;
+    let (root, online) = fetch_or_recall_root(drive.as_ref(), &rt, &db)?;
    let scope = root.tree_event_scope_id();
    db.mount_upsert_my_files(&mountpoint.to_string_lossy(), &root.uid.to_string(), None)
        .map_err(|error| std::io::Error::other(format!("project My Files mount: {error}")))?;
@@ -357,13 +402,16 @@ pub fn mount(
    // handlers can trigger reconciles.
    let (sync_tx, sync_rx) = std::sync::mpsc::channel::<sync::SyncMsg>();

+    let paused_until = pause::load_paused_until(&db);
    let core = Core {
-        client: client.clone(),
+        drive,
+        client,
        rt: rt.clone(),
        maintenance: Arc::new(Mutex::new(Default::default())),
        primary_root_uid: root.uid.clone(),
        primary: true,
-        state: Arc::new(Mutex::new(State::new(db.clone(), share_access, 2))),
+        state: Arc::new(Mutex::new(State::new(db.clone(), share_access))),
+        root: Arc::new(OnceLock::new()),
        cache: Arc::new(cache),
        readers: Arc::new(Mutex::new(HashMap::new())),
        block_ring: Arc::new(Mutex::new(BlockRing::default())),
@@ -377,19 +425,23 @@ pub fn mount(
        shared_generation: Arc::new(AtomicU64::new(0)),
        shared_refresh_deadlines: Arc::new(Mutex::new(SharedRefreshDeadlines::default())),
        online: Arc::new(AtomicBool::new(online)),
+        link: Arc::new(Default::default()),
+        sync_paused_until: Arc::new(AtomicI64::new(paused_until)),
        pending: Arc::new(Mutex::new(HashMap::new())),
        hidden: Arc::new(Mutex::new(HashSet::new())),
        drain_wake: Arc::new((Mutex::new(false), Condvar::new())),
        shutdown: Arc::new(crate::shutdown::Shutdown::default()),
        upload_times: Arc::new(Mutex::new(HashMap::new())),
        upload_cancel: Arc::new(Mutex::new(HashMap::new())),
+        landing_uploads: Arc::new(AtomicU64::new(0)),
        timeline_refreshing: Arc::new(AtomicBool::new(false)),
+        timeline_progress: Arc::new(Mutex::new(None)),
+        similar_hashing: Arc::new(AtomicBool::new(false)),
        albums_refreshing: Arc::new(AtomicBool::new(false)),
        trash_refreshing: Arc::new(AtomicBool::new(false)),
        trash_progress: Arc::new(tokio::sync::Notify::new()),
        conflict_notified: Arc::new(Mutex::new(HashSet::new())),
        sweep_mode,
-        own_sealed_revs: Arc::new(Mutex::new(HashMap::new())),
        self_changes: Arc::new(Mutex::new(HashMap::new())),
        thumb_gen: Arc::new(Mutex::new(HashSet::new())),
        thumb_gen_budget: Arc::new(tokio::sync::Semaphore::new(
@@ -402,11 +454,13 @@ pub fn mount(
        thumbnail_build_cancel: Arc::new(tokio::sync::Notify::new()),
        thumbnail_misses: Arc::new(Mutex::new(Default::default())),
        quota: Arc::new(Mutex::new(None)),
+        quota_refreshing: Arc::new(AtomicBool::new(false)),
        size_upgrades: Arc::new(Mutex::new(HashMap::new())),
        size_waiters: Arc::new(Default::default()),
        notifier: Arc::new(OnceLock::new()),
        session_live: Arc::new(AtomicBool::new(false)),
        transfers: TransferRegistry::new(),
+        events: Arc::new(Default::default()),
        indexing: Arc::new(AtomicBool::new(false)),
        sync_progress: Arc::new(Mutex::new(HashMap::new())),
        sync_tx,
@@ -415,8 +469,9 @@ pub fn mount(
        states: Arc::new(StateRegistry::default()),
    };
    // Before anything can queue work against it: the drain thread below reaches
-    // every mount's inode space through this registry, not through `core.state`.
+    // every mount's session through this registry.
    core.register_state(mountpoint);
+    core.transfers.set_limits(upload_limit, download_limit);

    // Writes queued by a previous run (or left behind by a crash) are still owed
    // an upload, and reads must be served from their staged blobs until they land.
@@ -451,6 +506,10 @@ pub fn mount(
    // Start the folder-sync engine. It watches every mirror folder, polls the
    // remotes, and reconciles on its own thread — never in front of a FUSE call.
    workers.extend(sync::spawn(core.clone(), sync_rx));
+    // A timed pause persisted by an earlier run still has to end on time.
+    if pause::paused_at(paused_until, now_secs()) && paused_until != pause::PAUSED_INDEFINITELY {
+        core.arm_pause_timer(paused_until);
+    }

    // Reconcile leftover `(sync-conflict …)` copies: drop the ones that turned
    // out identical to the live file, surface the ones that genuinely diverge.
@@ -469,9 +528,10 @@ pub fn mount(
        );
    }

-    // Mounted from the cache: watch for the network coming back so the mount can
-    // stop being read-only-ish without the user restarting the daemon.
-    if !online {
+    // Watch the link for the life of the mount: a mount from the cache waits for
+    // the network to come back, and an online one can lose it at any moment and
+    // must notice it coming back just the same.
+    {
        let core = core.clone();
        workers.push(
            std::thread::Builder::new()
@@ -482,7 +542,7 @@ pub fn mount(

    // Keep the launcher prompt's "This computer" index fresh. Its own thread:
    // the walk is I/O-heavy and must never sit in front of a FUSE callback.
-    {
+    if matches!(host, Host::Daemon) {
        let db = core.db.clone();
        let indexing = core.indexing.clone();
        let transfers = core.transfers.clone();
@@ -554,6 +614,22 @@ pub fn mount(
            }
        }
    }
+    // Publishes what changes without one place to publish it from (status,
+    // transfers, sync progress) to the front-ends subscribed on that socket.
+    {
+        let sampler_core = core.clone();
+        let username = username.clone();
+        let mountpoint = mountpoint.to_path_buf();
+        match std::thread::Builder::new()
+            .name("pdfs-events".into())
+            .spawn(move || events::run_event_sampler(sampler_core, username, mountpoint))
+        {
+            Ok(handle) => workers.push(handle),
+            // Not fatal: front-ends still get every published change, only
+            // not the sampled ones.
+            Err(error) => warn!(error = %error, "could not start the event sampler"),
+        }
+    }
    // The supervisor watches the pool and answers the systemd watchdog. Started
    // after the listener, because its liveness probe is a round trip over that
    // socket.
@@ -590,7 +666,7 @@ pub fn mount(
            }
        }
    };
-    rt.spawn(run_event_sync(client, scope, core.clone()));
+    rt.spawn(run_event_sync(core.drive.clone(), scope, core.clone()));
    // The photos volume has its own event stream; without it the gallery only
    // learns about a phone-side deletion when the timeline goes stale.
    rt.spawn(run_photos_event_sync(core.clone()));
@@ -609,30 +685,11 @@ pub fn mount(
    // are delivered onto the async runtime; bridge them onto a sync channel so
    // the loop below can react without blocking a worker thread. A bounded
    // channel of 1 is enough — we only need to know that *a* stop arrived.
-    let (sig_tx, sig_rx) = std::sync::mpsc::sync_channel::<()>(1);
-    rt.spawn(async move {
-        let mut sigterm =
-            match tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate()) {
-                Ok(s) => s,
-                Err(e) => {
-                    warn!(error = %e, "install SIGTERM handler failed");
-                    return;
-                }
-            };
-        let mut sigint =
-            match tokio::signal::unix::signal(tokio::signal::unix::SignalKind::interrupt()) {
-                Ok(s) => s,
-                Err(e) => {
-                    warn!(error = %e, "install SIGINT handler failed");
-                    return;
-                }
-            };
-        tokio::select! {
-            _ = sigterm.recv() => info!("received SIGTERM"),
-            _ = sigint.recv() => info!("received SIGINT"),
-        }
-        let _ = sig_tx.try_send(());
-    });
+    let sig_rx = match host {
+        Host::Daemon => signal_stop(&rt),
+        #[cfg(test)]
+        Host::Simulation(rx) => rx,
+    };

    // Wait for whichever happens first: a stop signal (→ we unmount ourselves
    // via the lazy MNT_DETACH path, clean even mid-download), or the kernel
@@ -689,6 +746,35 @@ pub fn mount(
    Ok(outcome)
 }

+/// A channel that receives once SIGTERM or SIGINT arrives.
+fn signal_stop(rt: &tokio::runtime::Handle) -> std::sync::mpsc::Receiver<()> {
+    let (sig_tx, sig_rx) = std::sync::mpsc::sync_channel::<()>(1);
+    rt.spawn(async move {
+        let mut sigterm =
+            match tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate()) {
+                Ok(s) => s,
+                Err(e) => {
+                    warn!(error = %e, "install SIGTERM handler failed");
+                    return;
+                }
+            };
+        let mut sigint =
+            match tokio::signal::unix::signal(tokio::signal::unix::SignalKind::interrupt()) {
+                Ok(s) => s,
+                Err(e) => {
+                    warn!(error = %e, "install SIGINT handler failed");
+                    return;
+                }
+            };
+        tokio::select! {
+            _ = sigterm.recv() => info!("received SIGTERM"),
+            _ = sigint.recv() => info!("received SIGINT"),
+        }
+        let _ = sig_tx.try_send(());
+    });
+    sig_rx
+}
+
 /// How long teardown waits for the FUSE worker pool before proceeding without
 /// it. Long enough for an in-flight block to finish, short enough that
 /// `systemctl --user stop` still returns inside `TimeoutStopSec`.
@@ -0,0 +1,235 @@
+//! Pausing sync: the user's "stop uploading for a while".
+//!
+//! A pause holds back the two things that push local state to the remote — the
+//! drain worker's queued uploads and changes, and the mirror-folder reconcile.
+//! Nothing else stops: reads through the mount keep hydrating on demand (a read
+//! is not a sync), writes keep being accepted and staged, and the watcher and
+//! poll keep noticing changes. Resuming lets all of it catch up at once.
+//!
+//! The pause is persisted in the database, so a restart does not quietly undo
+//! it. A timed pause ends by itself; [`Core::set_sync_paused`] arms a timer for
+//! that, and [`Core::sync_paused`] compares against the clock anyway, so a
+//! deadline that passed while the daemon was down is already over on mount.
+//!
+//! A single mirror folder can be paused on its own as well: its reconcile is
+//! skipped, and with it any mode switch queued behind that reconcile, until the
+//! folder is resumed. On-demand folders cannot be paused alone — their writes
+//! go through the shared queue, which only the global pause holds back.
+
+use super::*;
+
+/// The `state` key holding the resume time, in Unix seconds.
+const PAUSED_UNTIL_KEY: &str = "sync_paused_until";
+
+/// The `state` key prefix marking one synced folder paused; its id follows.
+const FOLDER_PAUSED_PREFIX: &str = "sync_folder_paused:";
+
+fn folder_paused_key(id: i64) -> String {
+    format!("{FOLDER_PAUSED_PREFIX}{id}")
+}
+
+/// Whether synced folder `id` is paused on its own. A row that cannot be read
+/// counts as running, like the global pause.
+fn load_folder_paused(db: &Db, id: i64) -> bool {
+    match db.state_i64(&folder_paused_key(id)) {
+        Ok(value) => value.is_some_and(|v| v != 0),
+        Err(error) => {
+            warn!(id, %error, "reading a folder pause failed; treating it as running");
+            false
+        }
+    }
+}
+
+/// Persist synced folder `id`'s own pause, or clear it.
+fn store_folder_paused(db: &Db, id: i64, paused: bool) -> pdfs_core::Result<()> {
+    match paused {
+        true => db.set_state_i64(&folder_paused_key(id), 1),
+        false => db.clear_state(&folder_paused_key(id)),
+    }
+}
+
+/// A pause with no end time: it lasts until the user resumes.
+pub(crate) const PAUSED_INDEFINITELY: i64 = i64::MAX;
+
+/// The persisted pause, or `0` when there is none (or it cannot be read — a
+/// broken state row must not keep sync paused forever).
+pub(crate) fn load_paused_until(db: &Db) -> i64 {
+    match db.state_i64(PAUSED_UNTIL_KEY) {
+        Ok(Some(until)) => until,
+        Ok(None) => 0,
+        Err(error) => {
+            warn!(%error, "reading the sync pause failed; treating sync as running");
+            0
+        }
+    }
+}
+
+/// Whether a pause lasting until `until` is still in force at `now` (both Unix
+/// seconds). `0` is "not paused".
+pub(crate) fn paused_at(until: i64, now: i64) -> bool {
+    until != 0 && now < until
+}
+
+impl Core {
+    /// True while the user has sync paused.
+    pub(crate) fn sync_paused(&self) -> bool {
+        paused_at(self.sync_paused_until.load(Ordering::Relaxed), now_secs())
+    }
+
+    /// The pause's end, for status reporting: `None` when not paused,
+    /// `Some(None)` when paused until resumed, `Some(Some(t))` when it ends at
+    /// Unix second `t`.
+    pub(crate) fn sync_pause(&self) -> Option<Option<i64>> {
+        let until = self.sync_paused_until.load(Ordering::Relaxed);
+        match paused_at(until, now_secs()) {
+            false => None,
+            true if until == PAUSED_INDEFINITELY => Some(None),
+            true => Some(Some(until)),
+        }
+    }
+
+    /// Pause sync until Unix second `until` (`None`: until resumed), or resume
+    /// it when `paused` is false.
+    pub(crate) fn set_sync_paused(
+        &self,
+        paused: bool,
+        until: Option<i64>,
+    ) -> Result<(), CoreError> {
+        let value = match (paused, until) {
+            (false, _) => 0,
+            (true, None) => PAUSED_INDEFINITELY,
+            (true, Some(until)) if until <= now_secs() => {
+                return Err(CoreError::invalid("the pause would already be over"));
+            }
+            (true, Some(until)) => until,
+        };
+        let persisted = match value {
+            0 => self.db.clear_state(PAUSED_UNTIL_KEY),
+            value => self.db.set_state_i64(PAUSED_UNTIL_KEY, value),
+        };
+        if let Err(error) = persisted {
+            return Err(CoreError::internal(format!(
+                "saving the sync pause: {error}"
+            )));
+        }
+        self.sync_paused_until.store(value, Ordering::Relaxed);
+        match value {
+            0 => {
+                info!("sync resumed");
+                self.resume_sync_work();
+            }
+            PAUSED_INDEFINITELY => info!("sync paused until resumed"),
+            until => {
+                info!(until, "sync paused");
+                self.arm_pause_timer(until);
+            }
+        }
+        Ok(())
+    }
+
+    /// True while the user has this one synced folder paused. A row that cannot
+    /// be read counts as running, like the global pause.
+    pub(crate) fn sync_folder_paused(&self, id: i64) -> bool {
+        load_folder_paused(&self.db, id)
+    }
+
+    /// Pause or resume one mirror folder's reconcile. Resuming reconciles it
+    /// straight away to catch up on what the watcher saw meanwhile.
+    pub(crate) fn set_sync_folder_paused(&self, id: i64, paused: bool) -> Result<(), CoreError> {
+        let folder = self
+            .db
+            .sync_folder_get(id)
+            .map_err(|e| CoreError::internal(format!("db: {e:?}")))?
+            .ok_or_else(|| CoreError::not_found(format!("no synced folder with id {id}")))?;
+        if paused && folder.mode != "mirror" {
+            return Err(CoreError::invalid(
+                "only a mirrored folder can be paused on its own; an on-demand folder uploads \
+                 through the shared queue, so pause all sync instead",
+            ));
+        }
+        if let Err(error) = store_folder_paused(&self.db, id, paused) {
+            return Err(CoreError::internal(format!(
+                "saving the folder pause: {error}"
+            )));
+        }
+        if paused {
+            info!(id, path = %folder.local_path, "folder sync paused");
+        } else {
+            info!(id, path = %folder.local_path, "folder sync resumed");
+            self.sync_now(Some(id));
+        }
+        Ok(())
+    }
+
+    /// Forget a removed folder's pause, so a later folder reusing its id does
+    /// not start out paused.
+    pub(crate) fn clear_sync_folder_paused(&self, id: i64) {
+        if let Err(error) = store_folder_paused(&self.db, id, false) {
+            warn!(id, %error, "clearing a removed folder's pause failed");
+        }
+    }
+
+    /// Wake everything a pause held back: the drain worker, and a full
+    /// reconcile to pick up whatever the watcher saw meanwhile.
+    fn resume_sync_work(&self) {
+        self.wake_drain();
+        self.sync_now(None);
+    }
+
+    /// End a timed pause when its time comes. A later pause or resume replaces
+    /// the stored deadline, which the timer checks before acting, so a stale
+    /// timer does nothing.
+    pub(crate) fn arm_pause_timer(&self, until: i64) {
+        let core = self.clone();
+        let wait = Duration::from_secs(until.saturating_sub(now_secs()).max(0) as u64);
+        let spawned = std::thread::Builder::new()
+            .name("pdfs-pause".into())
+            .spawn(move || {
+                if !core.shutdown.sleep(wait) {
+                    return;
+                }
+                if core
+                    .sync_paused_until
+                    .compare_exchange(until, 0, Ordering::Relaxed, Ordering::Relaxed)
+                    .is_ok()
+                {
+                    if let Err(error) = core.db.clear_state(PAUSED_UNTIL_KEY) {
+                        warn!(%error, "clearing an expired sync pause failed");
+                    }
+                    info!("sync pause ended");
+                    core.resume_sync_work();
+                }
+            });
+        if let Err(error) = spawned {
+            // The drain and the reconcile still read the clock, so the pause
+            // still ends — just at the next idle poll instead of on time.
+            warn!(%error, "starting the sync pause timer failed");
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn a_pause_is_in_force_until_its_deadline() {
+        assert!(!paused_at(0, 100));
+        assert!(paused_at(200, 100));
+        assert!(!paused_at(200, 200));
+        assert!(!paused_at(200, 300));
+        assert!(paused_at(PAUSED_INDEFINITELY, i64::MAX - 1));
+    }
+
+    #[test]
+    fn a_folder_pause_is_kept_per_folder_until_cleared() {
+        let db = Db::open(std::path::Path::new(":memory:")).unwrap();
+        assert!(!load_folder_paused(&db, 3));
+        store_folder_paused(&db, 3, true).unwrap();
+        assert!(load_folder_paused(&db, 3));
+        assert!(!load_folder_paused(&db, 4));
+        assert!(!load_folder_paused(&db, 33));
+        store_folder_paused(&db, 3, false).unwrap();
+        assert!(!load_folder_paused(&db, 3));
+    }
+}
@@ -101,7 +101,7 @@ impl Core {
        match existing {
            Some(uid) => self
                .rt
-                .block_on(self.client.upload_new_revision_from(
+                .block_on(self.drive.upload_new_revision_from(
                    &uid,
                    Cursor::new(bytes),
                    len,
@@ -112,7 +112,7 @@ impl Core {
                .map_err(|e| CoreError::from_api(&e, "upload profile revision"))?,
            None => {
                self.rt
-                    .block_on(self.client.upload_file_replacing_draft_from(
+                    .block_on(self.drive.upload_file_replacing_draft_from(
                        &dir_uid,
                        PROFILE_FILE_NAME,
                        "application/json",
@@ -182,14 +182,14 @@ impl Core {
    ) -> CoreResult<Option<NodeUid>> {
        let uids = self
            .rt
-            .block_on(self.client.enumerate_folder_children_node_uids(parent_uid))
+            .block_on(self.drive.enumerate_folder_children_node_uids(parent_uid))
            .map_err(|e| CoreError::from_api(&e, "list device root"))?;
        if uids.is_empty() {
            return Ok(None);
        }
        let nodes = self
            .rt
-            .block_on(self.client.enumerate_nodes(&uids))
+            .block_on(self.drive.enumerate_nodes(&uids))
            .map_err(|e| CoreError::from_api(&e, "resolve device root children"))?;
        Ok(nodes
            .into_iter()
@@ -210,7 +210,7 @@ impl Core {
        let uid = self
            .rt
            .block_on(
-                self.client
+                self.drive
                    .create_folder(root_uid, PROFILE_DIR_NAME, Some(now_secs())),
            )
            .map_err(|e| CoreError::from_api(&e, "create profile folder"))?;
@@ -241,22 +241,26 @@ impl Core {
        };
        let mut buf: Vec<u8> = Vec::new();
        self.rt
-            .block_on(self.client.download_file_to(&uid, &mut buf))
+            .block_on(self.drive.download_file_to(&uid, &mut buf))
            .map_err(|e| CoreError::from_api(&e, "download profile"))?;
        Profile::parse(&buf).map(Some).map_err(CoreError::invalid)
    }

    // ---- restore (features.md 5.2) ----------------------------------------

-    /// The folders under this machine's device that could be synced here, each
-    /// carrying a proposed local path.
+    /// The folders under a device that could be synced here, each carrying a
+    /// proposed local path. `device` names another registered device by uid;
+    /// `None` is this machine's own.
    ///
    /// The proposal comes from the profile when one exists and its path is
    /// usable on this machine, and from `~/<name>` otherwise — a restored
    /// `/home/other-user/Documents` would be wrong on a machine where that user
    /// does not exist, and silently creating it would be worse.
-    pub(crate) fn list_restorable_folders(&self) -> CoreResult<Vec<RestorableFolder>> {
-        let device = self.ensure_device()?;
+    pub(crate) fn list_restorable_folders(
+        &self,
+        device: Option<&str>,
+    ) -> CoreResult<Vec<RestorableFolder>> {
+        let device = self.restore_source(device)?;
        let root_uid = parse_uid(&device.root_uid).ok_or_else(|| {
            CoreError::internal(format!("bad device root uid: {}", device.root_uid))
        })?;
@@ -273,13 +277,13 @@ impl Core {

        let uids = self
            .rt
-            .block_on(self.client.enumerate_folder_children_node_uids(&root_uid))
+            .block_on(self.drive.enumerate_folder_children_node_uids(&root_uid))
            .map_err(|e| CoreError::from_api(&e, "list device root"))?;
        let nodes = if uids.is_empty() {
            Vec::new()
        } else {
            self.rt
-                .block_on(self.client.enumerate_nodes(&uids))
+                .block_on(self.drive.enumerate_nodes(&uids))
                .map_err(|e| CoreError::from_api(&e, "resolve device root children"))?
        };

@@ -334,11 +338,12 @@ impl Core {
    pub(crate) fn restore_sync_folders(
        &self,
        items: &[pdfs_core::control::RestoreItem],
+        device: Option<&str>,
    ) -> CoreResult<String> {
        if items.is_empty() {
            return Err(CoreError::invalid("nothing to restore"));
        }
-        let device = self.ensure_device()?;
+        let device = self.restore_source(device)?;
        let existing = self
            .db
            .sync_folder_list()
@@ -499,6 +504,19 @@ mod tests {
        assert_before(add, "PROFILE_DIR_NAME", "ensure_device()");
    }

+    /// Restoring another computer's folders reads that device, but must not
+    /// rewrite the cached device row: this machine would then back up as the
+    /// other computer.
+    #[test]
+    fn restoring_from_another_device_keeps_this_machines_identity() {
+        let source = function_source(include_str!("devices.rs"), "fn restore_source(");
+        assert!(source.contains("ensure_device()"), "None is this machine");
+        assert!(
+            !source.contains("device_set"),
+            "the cached row is untouched"
+        );
+    }
+
    fn function_source<'a>(source: &'a str, signature: &str) -> &'a str {
        let start = source.find(signature).expect("function signature exists");
        let body = &source[start..];
@@ -0,0 +1,60 @@
+//! The user's view of the pending-op queue: what has not reached the remote
+//! yet, why, and a way to stop waiting out a backoff.
+//!
+//! Read-only apart from "retry now", which only moves a row's next-attempt time.
+//! Nothing here drops a queued op: its staged blob is the only copy of the
+//! user's write (see `docs/RECOVERY.md`).
+
+use super::*;
+use pdfs_core::control::PendingOpInfo;
+use pdfs_core::db::{FAILING_ATTEMPTS, PARK_UNTIL};
+
+impl Core {
+    /// Every queued op, oldest first, with a path a person can read.
+    pub(crate) fn pending_op_infos(&self) -> CoreResult<Vec<PendingOpInfo>> {
+        let ops = self
+            .db
+            .pending_ops()
+            .map_err(|e| CoreError::internal(format!("listing the queue: {e}")))?;
+        Ok(ops
+            .into_iter()
+            .map(|op| {
+                let parked = op.next_attempt_at >= PARK_UNTIL;
+                let path = self
+                    .db
+                    .node_path(&op.uid)
+                    .ok()
+                    .flatten()
+                    .filter(|path| !path.is_empty())
+                    .or_else(|| op.name.clone())
+                    .unwrap_or_else(|| op.uid.clone());
+                PendingOpInfo {
+                    id: op.id,
+                    kind: op.kind,
+                    path,
+                    attempts: op.attempts,
+                    last_error: op.last_error,
+                    queued_at: op.created_at / 1000,
+                    next_attempt_at: (!parked).then_some(op.next_attempt_at / 1000),
+                    parked,
+                    failing: op.attempts >= FAILING_ATTEMPTS,
+                }
+            })
+            .collect())
+    }
+
+    /// Retry one backed-off op now, or every failed one when `id` is `None`.
+    /// Returns how many ops were moved up.
+    pub(crate) fn retry_pending_ops(&self, id: Option<i64>) -> CoreResult<usize> {
+        let now = now_millis();
+        let moved = match id {
+            Some(id) => self.db.retry_op_now(id, now).map(usize::from),
+            None => self.db.retry_failed_ops_now(now),
+        }
+        .map_err(|e| CoreError::internal(format!("retrying the queue: {e}")))?;
+        if moved > 0 {
+            self.wake_drain();
+        }
+        Ok(moved)
+    }
+}
@@ -36,6 +36,21 @@ pub(super) const REPAIR_MAX: u64 = 512 * 1024 * 1024;
 /// demand read in the SDK's flat block semaphore.
 pub(super) const PREFETCH_BUDGET: usize = 8;

+/// How long one read may wait on the network before it fails with `EIO`.
+///
+/// The SDK bounds each request, not a read: a block that times out is retried,
+/// and a read can need several blocks, a block table and a repair. On a link
+/// that stalled without dropping, one `read` held a FUSE worker for 34 minutes
+/// and the application behind it with it (`docs/BUGS.md` B107). An error the
+/// caller can retry beats a process stuck in `D` state.
+pub(super) const READ_FETCH_TIMEOUT: Duration = Duration::from_secs(120);
+
+/// How long a read of blocks nothing has cached waits for a lost link to come
+/// back before failing. Long enough to ride out a Wi-Fi blip, short enough
+/// that a program reading while the laptop is really offline gets its `EIO`
+/// before the user gives up on it.
+const READ_OFFLINE_WAIT: Duration = Duration::from_secs(30);
+
 /// Cap on tracked sequential streams. Only reads in progress matter, so the map
 /// is cleared wholesale rather than aged — losing the ramp costs one read.
 const MAX_PREFETCH_STREAMS: usize = 256;
@@ -55,7 +70,7 @@ const MAX_OPEN_READERS: usize = 64;
 /// `(mtime, size)` — the same validity pair the content cache uses (a new
 /// revision bumps mtime). On a mismatch the reader is dropped and reopened.
 pub(super) struct CachedReader {
-    reader: Arc<RevisionReader>,
+    reader: Arc<dyn RevisionRead>,
    mtime: i64,
    size: u64,
    /// For LRU eviction.
@@ -86,7 +101,7 @@ pub(super) struct PendingOpen {
    /// must not join this open — it would get a reader for the wrong bytes.
    mtime: i64,
    size: u64,
-    rx: tokio::sync::watch::Receiver<Option<Result<Arc<RevisionReader>, Errno>>>,
+    rx: tokio::sync::watch::Receiver<Option<Result<Arc<dyn RevisionRead>, Errno>>>,
 }

 /// Distinguishes `PendingOpen`s. Only uniqueness matters, so a plain counter
@@ -298,16 +313,16 @@ impl Core {
        uid: &NodeUid,
        mtime: i64,
        fsize: u64,
-    ) -> Result<Arc<RevisionReader>, Errno> {
+    ) -> Result<Arc<dyn RevisionRead>, Errno> {
        loop {
            // Decide under the lock, act outside it — network I/O must never run
            // under a std `Mutex`, and an await must never hold one.
            enum Act {
-                Hit(Arc<RevisionReader>),
-                Join(tokio::sync::watch::Receiver<Option<Result<Arc<RevisionReader>, Errno>>>),
+                Hit(Arc<dyn RevisionRead>),
+                Join(tokio::sync::watch::Receiver<Option<Result<Arc<dyn RevisionRead>, Errno>>>),
                Lead(
                    u64,
-                    tokio::sync::watch::Sender<Option<Result<Arc<RevisionReader>, Errno>>>,
+                    tokio::sync::watch::Sender<Option<Result<Arc<dyn RevisionRead>, Errno>>>,
                ),
            }
            let act = {
@@ -361,9 +376,10 @@ impl Core {
                }
                Act::Lead(id, tx) => {
                    debug!(%uid, mtime, fsize, "opening revision");
-                    let result = match self.client.open_revision(uid).await {
-                        Ok(reader) => Ok(Arc::new(reader)),
+                    let result = match self.drive.open_revision(uid).await {
+                        Ok(reader) => Ok(reader),
                        Err(e) => {
+                            self.lost_link(&e, "open a revision");
                            warn!(%uid, error = %e, "open_revision failed");
                            Err(Errno::EIO)
                        }
@@ -552,7 +568,7 @@ impl Core {
    /// leader's claim is gone by then, so this cannot recurse.
    async fn fetch_block(
        &self,
-        reader: &Arc<RevisionReader>,
+        reader: &Arc<dyn RevisionRead>,
        uid: &NodeUid,
        mtime: i64,
        fsize: u64,
@@ -618,7 +634,7 @@ impl Core {
    /// download, or the read fails. See [`Core::repair_block`] (bugs.md B84).
    async fn read_block(
        &self,
-        reader: &Arc<RevisionReader>,
+        reader: &Arc<dyn RevisionRead>,
        uid: &NodeUid,
        mtime: i64,
        fsize: u64,
@@ -649,6 +665,7 @@ impl Core {
                    .store_block_geometry(uid, mtime, fsize, reader.block_sizes());
            }
            let bytes = reader.read_at(span.start, span.len).await.map_err(|e| {
+                self.lost_link(&e, "read a block");
                warn!(%uid, start = span.start, len = span.len, error = %e, "block read failed");
                Errno::EIO
            })?;
@@ -761,7 +778,7 @@ impl Core {
            error!(%uid, %error, "creating a scratch file for a repair download failed");
            Errno::EIO
        })?;
-        let outcome = self.client.download_file_to(uid, &mut file).await;
+        let outcome = self.drive.download_file_to(uid, &mut file).await;
        let stored = (|| {
            outcome.map_err(|error| {
                warn!(%uid, %error, "repair download failed");
@@ -939,28 +956,67 @@ impl Core {
        }

        if !misses.is_empty() {
-            let fetched = self.rt.block_on(async {
-                // Resolve the file's keys and block table once, then read every
-                // missing block through the shared reader. Previously each block
-                // called `download_range`, which redid that resolution per block.
-                let reader = self.revision_reader(uid, mtime, fsize).await?;
+            // One deadline for the whole read, including any wait for a lost
+            // link. A fetch that failed because the link went down is tried
+            // once more when it is back, so a blip is a slow read, not an `EIO`.
+            let deadline = Instant::now() + READ_FETCH_TIMEOUT;
+            let mut retried = false;
+            let fetched = loop {
+                if !self.is_online() {
+                    let wait =
+                        READ_OFFLINE_WAIT.min(deadline.saturating_duration_since(Instant::now()));
+                    if !self.wait_online(wait) {
+                        debug!(%uid, offset, len, "read of uncached blocks while offline; failing it");
+                        return Err(Errno::EIO);
+                    }
+                }
+                let fetch = async {
+                    // Resolve the file's keys and block table once, then read every
+                    // missing block through the shared reader. Previously each block
+                    // called `download_range`, which redid that resolution per block.
+                    let reader = self.revision_reader(uid, mtime, fsize).await?;

-                let mut set = tokio::task::JoinSet::new();
-                for &span in &misses {
-                    let (core, reader, uid) = (self.clone(), reader.clone(), uid.clone());
-                    set.spawn(async move {
-                        core.fetch_block(&reader, &uid, mtime, fsize, span, cache_blocks)
-                            .await
-                            .map(|bytes| (span.idx, bytes))
-                    });
+                    let mut set = tokio::task::JoinSet::new();
+                    for &span in &misses {
+                        let (core, reader, uid) = (self.clone(), reader.clone(), uid.clone());
+                        set.spawn(async move {
+                            core.fetch_block(&reader, &uid, mtime, fsize, span, cache_blocks)
+                                .await
+                                .map(|bytes| (span.idx, bytes))
+                        });
+                    }
+                    let mut out = Vec::with_capacity(misses.len());
+                    while let Some(joined) = set.join_next().await {
+                        // A join error means the task panicked; surface it as EIO.
+                        out.push(joined.map_err(|_| Errno::EIO)??);
+                    }
+                    Ok::<_, Errno>(out)
+                };
+                // Dropping the fetch on the deadline aborts the block tasks with
+                // it; blocks that already landed stay cached for the retry. The
+                // timer is built inside the runtime: a FUSE worker has no reactor
+                // of its own, and building it out here panicked every remote read.
+                let budget = deadline.saturating_duration_since(Instant::now());
+                match self
+                    .rt
+                    .block_on(async { tokio::time::timeout(budget, fetch).await })
+                {
+                    Ok(Ok(fetched)) => break fetched,
+                    // The fetch saw the link go down; the top of the loop waits
+                    // for it within what is left of the deadline.
+                    Ok(Err(_)) if !retried && !self.is_online() => retried = true,
+                    Ok(Err(e)) => return Err(e),
+                    Err(_) => {
+                        warn!(
+                            %uid, offset, len, secs = READ_FETCH_TIMEOUT.as_secs(),
+                            "read got no answer from the network in time; failing it"
+                        );
+                        self.evict_reader(uid);
+                        self.mark_offline("read", &crate::link::no_answer(READ_FETCH_TIMEOUT));
+                        return Err(Errno::EIO);
+                    }
                }
-                let mut out = Vec::with_capacity(misses.len());
-                while let Some(joined) = set.join_next().await {
-                    // A join error means the task panicked; surface it as EIO.
-                    out.push(joined.map_err(|_| Errno::EIO)??);
-                }
-                Ok::<_, Errno>(out)
-            })?;
+            };
            for (bidx, bytes) in fetched {
                blocks[(bidx - first) as usize] = Some(bytes);
            }
@@ -8,7 +8,7 @@
 //!
 //! Proton has no API for editing a sealed capture time, so the repair is a
 //! rewrite: download the photo, upload it again with the capture time its file
-//! name implies, put the new copy back into the albums and favourites the old
+//! name implies, put the new copy back into the albums and favorites the old
 //! one was in, then **trash** (not delete) the original. Trash rather than
 //! delete so a bad run is recoverable from Proton's own trash for 30 days.
 //!
@@ -213,7 +213,7 @@ impl Core {
        drop(guard);
        let new_uid = uploaded.map_err(|e| CoreError::from_api(&e, "re-upload photo"))?;

-        // Favourite and albums before the trash: a failure here leaves both
+        // Favorite and albums before the trash: a failure here leaves both
        // copies on the account, which is recoverable by hand. Losing the
        // original first would not be.
        if candidate.favorite {
@@ -227,7 +227,7 @@ impl Core {
                // just set does not come back as a remote change.
                Ok(_) => self.note_self_change(&new_uid),
                Err(e) => {
-                    warn!(name = candidate.name, error = %e, "cannot re-favourite re-dated photo")
+                    warn!(name = candidate.name, error = %e, "cannot re-favorite re-dated photo")
                }
            }
        }
@@ -248,10 +248,7 @@ impl Core {

        let outcomes = self
            .rt
-            .block_on(
-                self.client
-                    .trash_nodes(std::slice::from_ref(&candidate.uid)),
-            )
+            .block_on(self.drive.trash_nodes(std::slice::from_ref(&candidate.uid)))
            .map_err(|e| CoreError::from_api(&e, "trash the mis-dated original"))?;
        if let Some((_, Err(e))) = outcomes.into_iter().next() {
            return Err(CoreError::from_api(&e, "trash the mis-dated original"));
@@ -0,0 +1,611 @@
+//! Moving a file or folder between two locations without moving its content.
+//!
+//! `~/ProtonDrive` and every on-demand synced folder are separate FUSE
+//! sessions, and a mirror folder is a plain local directory. The kernel refuses
+//! `rename(2)` between two mounts with `EXDEV` before the daemon hears of it, so
+//! `mv` falls back to copy and delete: every file is downloaded, uploaded again,
+//! and the original is trashed.
+//!
+//! On Proton Drive the same move is one metadata change, because My files and
+//! this computer's device folders all live on the main volume. So a move
+//! request that names two absolute paths is resolved here, against every
+//! location this daemon knows, and done as a server-side move. The local side
+//! is then brought level: a mount forgets the node and re-lists, and a mirror
+//! folder either renames its copy along or drops it once Drive has it.
+
+use std::collections::HashMap;
+use std::path::{Component, Path, PathBuf};
+use std::sync::Arc;
+use std::time::Duration;
+
+use parking_lot::Mutex;
+use pdfs_core::db::{StoredSyncEntry, StoredSyncFolder};
+use pdfs_core::{CoreError, CoreResult};
+use proton_drive_rs::NodeKind;
+use proton_drive_rs::proton_sdk::ids::NodeUid;
+use tracing::{info, warn};
+
+use super::sync::mirror_subtree_unsynced;
+use super::{Core, is_local_uid, parse_uid};
+
+/// How long a move waits for a mirror folder's sync pass to finish before it
+/// reports the folder busy. A pass can run for hours on a first sync, so the
+/// move does not wait it out.
+const MIRROR_LOCK_WAIT: Duration = Duration::from_secs(5);
+
+/// Where one side of a move lives.
+enum Place {
+    /// My files or an on-demand folder: a live FUSE mount. `core` is rooted at
+    /// that mount and `rel` is relative to its mountpoint.
+    Mounted { core: Box<Core>, rel: PathBuf },
+    /// A mirror folder: a local directory kept in step by the sync engine.
+    /// `rel` is `/`-separated, relative to the folder, as the baseline keys it.
+    Mirror {
+        folder: StoredSyncFolder,
+        rel: String,
+    },
+}
+
+impl Place {
+    fn mirror_id(&self) -> Option<i64> {
+        match self {
+            Place::Mirror { folder, .. } => Some(folder.id),
+            Place::Mounted { .. } => None,
+        }
+    }
+
+    fn is_root(&self) -> bool {
+        match self {
+            Place::Mounted { rel, .. } => rel.as_os_str().is_empty(),
+            Place::Mirror { rel, .. } => rel.is_empty(),
+        }
+    }
+}
+
+/// The mirror folder that holds `abs`, and `abs` relative to it. The deepest
+/// folder wins, although folders are not expected to nest.
+fn mirror_covering(
+    folders: Vec<StoredSyncFolder>,
+    abs: &Path,
+) -> Option<(StoredSyncFolder, String)> {
+    let folder = folders
+        .into_iter()
+        .filter(|f| f.mode == "mirror" && abs.starts_with(&f.local_path))
+        .max_by_key(|f| Path::new(&f.local_path).components().count())?;
+    let rel = abs.strip_prefix(&folder.local_path).ok()?;
+    let parts = rel
+        .components()
+        .map(|c| match c {
+            Component::Normal(part) => part.to_str(),
+            _ => None,
+        })
+        .collect::<Option<Vec<_>>>()?;
+    Some((folder, parts.join("/")))
+}
+
+/// `name` inside the folder at `parent`, in baseline form.
+fn join_rel(parent: &str, name: &str) -> String {
+    if parent.is_empty() {
+        name.to_string()
+    } else {
+        format!("{parent}/{name}")
+    }
+}
+
+/// Rename `from` to `to`, failing with `EEXIST` rather than replacing
+/// whatever appeared at `to` since it was checked. A filesystem that cannot
+/// promise that gets a plain rename after one more look.
+fn rename_noreplace(from: &Path, to: &Path) -> std::io::Result<()> {
+    use std::ffi::CString;
+    use std::os::unix::ffi::OsStrExt;
+
+    let cstr = |p: &Path| {
+        CString::new(p.as_os_str().as_bytes())
+            .map_err(|_| std::io::Error::from_raw_os_error(libc::EINVAL))
+    };
+    let (c_from, c_to) = (cstr(from)?, cstr(to)?);
+    // SAFETY: both are valid NUL-terminated paths that outlive the call.
+    let rc = unsafe {
+        libc::syscall(
+            libc::SYS_renameat2,
+            libc::AT_FDCWD,
+            c_from.as_ptr(),
+            libc::AT_FDCWD,
+            c_to.as_ptr(),
+            libc::RENAME_NOREPLACE,
+        )
+    };
+    if rc == 0 {
+        return Ok(());
+    }
+    let err = std::io::Error::last_os_error();
+    match err.raw_os_error() {
+        Some(libc::EINVAL | libc::ENOSYS) => {
+            if std::fs::symlink_metadata(to).is_ok() {
+                return Err(std::io::Error::from_raw_os_error(libc::EEXIST));
+            }
+            std::fs::rename(from, to)
+        }
+        _ => Err(err),
+    }
+}
+
+/// Whether `uid` is `root` or lies under it, as far as the nodes table knows.
+fn under(core: &Core, root: &NodeUid, uid: &str) -> bool {
+    let root = root.to_string();
+    uid == root || matches!(core.db.path_relative_to(&root, uid), Ok(Some(_)))
+}
+
+impl Core {
+    /// Move the file or folder at `src` into the folder at `dest_parent`. Both
+    /// are absolute local paths and may be in different locations: My files,
+    /// an on-demand folder, or a mirror folder. Returns the moved name.
+    ///
+    /// Within one mount this is [`Core::move_to`]. Across locations it
+    /// is a server-side move followed by local bookkeeping; see the module
+    /// documentation. Anything the move could lose is refused up front.
+    pub(crate) fn move_between(&self, src: &Path, dest_parent: &Path) -> CoreResult<String> {
+        let source = self.locate(src)?;
+        let dest = self.locate(dest_parent)?;
+        if let (
+            Place::Mounted { core, rel },
+            Place::Mounted {
+                core: dest_core,
+                rel: dest_rel,
+            },
+        ) = (&source, &dest)
+            && Arc::ptr_eq(&core.root, &dest_core.root)
+        {
+            return core.move_to(rel, dest_rel);
+        }
+        if source.is_root() {
+            return Err(CoreError::invalid(format!(
+                "{} is the root of a synced location and cannot be moved",
+                src.display()
+            )));
+        }
+        if dest_parent.starts_with(src) {
+            return Err(CoreError::invalid("cannot move a folder into itself"));
+        }
+        let name = src
+            .file_name()
+            .and_then(|n| n.to_str())
+            .ok_or_else(|| CoreError::invalid(format!("{} has no usable name", src.display())))?
+            .to_string();
+
+        // Hold every mirror folder involved, lowest id first, so no sync pass
+        // sees the move half done and two moves cannot deadlock.
+        let mut ids: Vec<i64> = [source.mirror_id(), dest.mirror_id()]
+            .into_iter()
+            .flatten()
+            .collect();
+        ids.sort_unstable();
+        ids.dedup();
+        let locks: Vec<Arc<Mutex<()>>> = ids.iter().map(|&id| self.sync_lock(id)).collect();
+        let mut guards = Vec::with_capacity(locks.len());
+        for lock in &locks {
+            guards.push(lock.try_lock_for(MIRROR_LOCK_WAIT).ok_or_else(|| {
+                CoreError::conflict("a synced folder is busy syncing; try again when it is done")
+            })?);
+        }
+
+        let mut baselines: HashMap<i64, HashMap<String, StoredSyncEntry>> = HashMap::new();
+        for &id in &ids {
+            let baseline = self
+                .db
+                .sync_entries(id)
+                .map_err(|e| CoreError::internal(format!("db: {e}")))?;
+            baselines.insert(id, baseline);
+        }
+
+        let src_uid = self.source_uid(&source, &baselines)?;
+        let dest_uid = self.dest_uid(&dest, &baselines, &name)?;
+        if src_uid.volume_id != dest_uid.volume_id {
+            return Err(CoreError::invalid(
+                "the two locations are on different Proton Drive volumes; copy it instead",
+            ));
+        }
+        if under(self, &src_uid, &dest_uid.to_string()) {
+            return Err(CoreError::invalid("cannot move a folder into itself"));
+        }
+
+        // Mirror to mirror renames the local copy along, so it needs nothing
+        // proven about it. Another filesystem makes that impossible, and the
+        // pair then drops the source copy like any other move out of a mirror.
+        let mut renamed = None;
+        if let (
+            Place::Mirror { folder, rel },
+            Place::Mirror {
+                folder: dest_folder,
+                rel: dest_rel,
+            },
+        ) = (&source, &dest)
+        {
+            let from = src.to_path_buf();
+            let to = dest_parent.join(&name);
+            match rename_noreplace(&from, &to) {
+                Ok(()) => renamed = Some((from, to)),
+                Err(e) if e.raw_os_error() == Some(libc::EXDEV) => {
+                    info!(from = %folder.local_path, to = %dest_folder.local_path,
+                        "move: mirror folders are on different filesystems");
+                }
+                Err(e) if e.raw_os_error() == Some(libc::EEXIST) => {
+                    return Err(CoreError::conflict(format!(
+                        "{name} already exists in {}",
+                        dest_parent.display()
+                    )));
+                }
+                Err(e) => {
+                    return Err(CoreError::internal(format!(
+                        "could not move {} to {}: {e}",
+                        rel,
+                        join_rel(dest_rel, &name)
+                    )));
+                }
+            }
+        }
+        if renamed.is_none()
+            && let Place::Mirror { folder, rel } = &source
+            && let Some(reason) =
+                mirror_subtree_unsynced(Path::new(&folder.local_path), rel, &baselines[&folder.id])
+        {
+            return Err(CoreError::conflict(format!(
+                "{name} is not fully synced yet ({reason}); wait for the sync to finish"
+            )));
+        }
+
+        if let Err(e) = self.move_remote(&src_uid, &dest_uid) {
+            if let Some((from, to)) = &renamed
+                && let Err(back) = std::fs::rename(to, from)
+            {
+                warn!(from = %to.display(), to = %from.display(), error = %back,
+                    "move: could not put the local copy back after the move failed");
+            }
+            return Err(CoreError::from_api(&e, "move"));
+        }
+
+        self.settle_source(
+            &source,
+            &src_uid,
+            renamed.is_some(),
+            &dest,
+            &dest_uid,
+            &name,
+            src,
+        );
+        self.settle_dest(&dest, &dest_uid, &name);
+        drop(guards);
+        if renamed.is_none()
+            && let Place::Mirror { folder, .. } = &dest
+        {
+            // Nothing local exists yet; the folder's next pass downloads it.
+            self.sync_now(Some(folder.id));
+        }
+        Ok(name)
+    }
+
+    /// Which location `abs` is in. A mount is looked for first: a mirror folder
+    /// cannot live inside a FUSE mount, and a mount is what the kernel sees.
+    fn locate(&self, abs: &Path) -> CoreResult<Place> {
+        if let Some((core, rel)) = self.rooted_at(abs) {
+            if !rel
+                .components()
+                .all(|c| matches!(c, Component::Normal(_) | Component::CurDir))
+            {
+                return Err(CoreError::invalid(format!(
+                    "{} escapes its location",
+                    abs.display()
+                )));
+            }
+            return Ok(Place::Mounted {
+                core: Box::new(core),
+                rel,
+            });
+        }
+        let folders = self
+            .db
+            .sync_folder_list()
+            .map_err(|e| CoreError::internal(format!("db: {e}")))?;
+        mirror_covering(folders, abs)
+            .map(|(folder, rel)| Place::Mirror { folder, rel })
+            .ok_or_else(|| {
+                CoreError::invalid(format!(
+                    "{} is not in a Proton Drive location",
+                    abs.display()
+                ))
+            })
+    }
+
+    /// The node being moved, once everything that must hold before it leaves
+    /// its location has been checked.
+    fn source_uid(
+        &self,
+        source: &Place,
+        baselines: &HashMap<i64, HashMap<String, StoredSyncEntry>>,
+    ) -> CoreResult<NodeUid> {
+        match source {
+            Place::Mounted { core, rel } => {
+                let (ino, uid) = core.resolve(rel)?;
+                if is_local_uid(&uid) {
+                    return Err(CoreError::conflict(
+                        "it is not uploaded yet; wait for the upload to finish",
+                    ));
+                }
+                let old_parent = core.source_parent_uid(ino, rel)?;
+                for authority in [&uid, &old_parent] {
+                    core.require_uid_writable(authority)
+                        .map_err(|e| core.errno_error(e, "move access"))?;
+                }
+                if self.has_pending_work_under(&uid)? {
+                    return Err(CoreError::conflict(
+                        "it has changes that are not uploaded yet; wait for the upload to finish",
+                    ));
+                }
+                Ok(uid)
+            }
+            Place::Mirror { folder, rel } => baselines[&folder.id]
+                .get(rel)
+                .and_then(|entry| entry.remote_uid.as_deref())
+                .and_then(parse_uid)
+                .ok_or_else(|| {
+                    CoreError::conflict(
+                        "it is not on Proton Drive yet; wait for the sync to finish",
+                    )
+                }),
+        }
+    }
+
+    /// The folder the node moves into. Refuses one that already holds `name`
+    /// on this disk; Drive refuses a clash on its side by itself.
+    fn dest_uid(
+        &self,
+        dest: &Place,
+        baselines: &HashMap<i64, HashMap<String, StoredSyncEntry>>,
+        name: &str,
+    ) -> CoreResult<NodeUid> {
+        let uid = match dest {
+            Place::Mounted { core, rel } => {
+                let (ino, uid) = core.resolve(rel)?;
+                let is_folder = core
+                    .state()
+                    .entries
+                    .get(&ino)
+                    .is_some_and(|entry| matches!(entry.node.kind, NodeKind::Folder));
+                if !is_folder {
+                    return Err(CoreError::invalid("the destination is not a folder"));
+                }
+                core.require_uid_writable(&uid)
+                    .map_err(|e| core.errno_error(e, "move access"))?;
+                uid
+            }
+            Place::Mirror { folder, rel } => {
+                let local = Path::new(&folder.local_path).join(rel);
+                if !local.is_dir() {
+                    return Err(CoreError::invalid("the destination is not a folder"));
+                }
+                if std::fs::symlink_metadata(local.join(name)).is_ok() {
+                    return Err(CoreError::conflict(format!(
+                        "{name} already exists in the destination"
+                    )));
+                }
+                let uid = if rel.is_empty() {
+                    Some(folder.remote_uid.as_str())
+                } else {
+                    baselines[&folder.id]
+                        .get(rel)
+                        .and_then(|entry| entry.remote_uid.as_deref())
+                };
+                uid.and_then(parse_uid).ok_or_else(|| {
+                    CoreError::conflict(
+                        "the destination is not on Proton Drive yet; wait for the sync to finish",
+                    )
+                })?
+            }
+        };
+        if is_local_uid(&uid) {
+            return Err(CoreError::conflict(
+                "the destination is not uploaded yet; wait for the upload to finish",
+            ));
+        }
+        Ok(uid)
+    }
+
+    /// Whether the queue owes Drive anything for `uid` or a node under it, or a
+    /// file under it is open for writing. Moving such a node away would strand
+    /// the pending change against a path that no longer leads to it.
+    fn has_pending_work_under(&self, uid: &NodeUid) -> CoreResult<bool> {
+        let ops = self
+            .db
+            .pending_ops()
+            .map_err(|e| CoreError::internal(format!("db: {e}")))?;
+        if ops.iter().any(|op| {
+            under(self, uid, &op.uid)
+                || op
+                    .parent_uid
+                    .as_deref()
+                    .is_some_and(|p| under(self, uid, p))
+        }) {
+            return Ok(true);
+        }
+        // Collected first so no State lock is held across the nodes-table reads.
+        let mut writing = Vec::new();
+        self.for_each_state(|st| {
+            writing.extend(st.active_writes.values().map(|w| w.uid.to_string()));
+        });
+        Ok(writing.iter().any(|w| under(self, uid, w)))
+    }
+
+    /// Bring the source location level with a move Drive has made.
+    #[allow(clippy::too_many_arguments)]
+    fn settle_source(
+        &self,
+        source: &Place,
+        uid: &NodeUid,
+        renamed: bool,
+        dest: &Place,
+        dest_uid: &NodeUid,
+        name: &str,
+        src: &Path,
+    ) {
+        match source {
+            Place::Mounted { core, rel } => {
+                // Moved everywhere, so no mount keeps serving it under the old
+                // path and its row stays (`docs/BUGS.md` B117). The content
+                // cache is keyed by uid and stays valid.
+                self.relocate_everywhere(uid, dest_uid, name);
+                core.invalidate_parent_listing(rel);
+            }
+            Place::Mirror { folder, rel } if renamed => {
+                let Place::Mirror {
+                    folder: dest_folder,
+                    rel: dest_rel,
+                } = dest
+                else {
+                    unreachable!("a local rename needs a mirror destination");
+                };
+                if let Err(e) = self.db.sync_entries_move(
+                    folder.id,
+                    rel,
+                    dest_folder.id,
+                    &join_rel(dest_rel, name),
+                ) {
+                    // The next passes see a copy with no baseline on one side
+                    // and a baseline with no copy on the other. That uploads
+                    // the files again and trashes the moved node, but loses
+                    // nothing.
+                    warn!(error = ?e, "move: could not carry the sync baseline along");
+                }
+            }
+            Place::Mirror { folder, rel } => {
+                // Drive had all of it when the move was checked, so the local
+                // copy is only a stale duplicate now. Something written into it
+                // since would go with it, so look again first; if anything is
+                // new, the copy stays and the next pass uploads it as new.
+                let changed = match self.db.sync_entries(folder.id) {
+                    Ok(baseline) => {
+                        mirror_subtree_unsynced(Path::new(&folder.local_path), rel, &baseline)
+                    }
+                    Err(e) => Some(format!("db: {e}")),
+                };
+                if let Err(e) = self.db.sync_entries_remove_subtree(folder.id, rel) {
+                    warn!(error = ?e, "move: could not drop the sync baseline");
+                }
+                if let Some(reason) = changed {
+                    warn!(path = %src.display(), reason,
+                        "move: the local copy changed during the move; keeping it");
+                    return;
+                }
+                let removed = if src.is_dir() {
+                    std::fs::remove_dir_all(src)
+                } else {
+                    std::fs::remove_file(src)
+                };
+                if let Err(e) = removed {
+                    warn!(path = %src.display(), error = %e,
+                        "move: could not remove the local copy after the move");
+                }
+            }
+        }
+    }
+
+    /// Bring the destination location level with a move Drive has made.
+    fn settle_dest(&self, dest: &Place, uid: &NodeUid, name: &str) {
+        if let Place::Mounted { .. } = dest {
+            self.invalidate_children_of(uid);
+            // A lookup that missed before the move may be cached as absent.
+            self.for_each_mount(|st, notify| {
+                if let Some(&ino) = st.by_uid.get(uid) {
+                    notify.inval_entry(ino, name.to_string());
+                }
+            });
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn folder(id: i64, local_path: &str, mode: &str) -> StoredSyncFolder {
+        StoredSyncFolder {
+            id,
+            local_path: local_path.to_string(),
+            remote_uid: format!("vol~root{id}"),
+            remote_share_id: String::new(),
+            mode: mode.to_string(),
+            pending_mode: None,
+            state: "idle".to_string(),
+            last_sync: 0,
+        }
+    }
+
+    #[test]
+    fn mirror_covering_finds_the_mirror_folder_and_the_path_inside_it() {
+        let folders = vec![folder(1, "/home/u/Docs", "mirror")];
+        let (found, rel) = mirror_covering(folders, Path::new("/home/u/Docs/a/b.txt")).unwrap();
+        assert_eq!(found.id, 1);
+        assert_eq!(rel, "a/b.txt");
+    }
+
+    #[test]
+    fn mirror_covering_gives_an_empty_path_for_the_folder_itself() {
+        let folders = vec![folder(1, "/home/u/Docs", "mirror")];
+        let (_, rel) = mirror_covering(folders, Path::new("/home/u/Docs")).unwrap();
+        assert_eq!(rel, "");
+    }
+
+    #[test]
+    fn mirror_covering_prefers_the_deepest_folder() {
+        let folders = vec![
+            folder(1, "/home/u/Docs", "mirror"),
+            folder(2, "/home/u/Docs/Work", "mirror"),
+        ];
+        let (found, rel) = mirror_covering(folders, Path::new("/home/u/Docs/Work/x")).unwrap();
+        assert_eq!(found.id, 2);
+        assert_eq!(rel, "x");
+    }
+
+    #[test]
+    fn mirror_covering_skips_on_demand_folders_and_name_prefixed_siblings() {
+        let folders = || {
+            vec![
+                folder(1, "/home/u/Docs", "mirror"),
+                folder(2, "/home/u/Media", "ondemand"),
+            ]
+        };
+        assert!(mirror_covering(folders(), Path::new("/home/u/Media/x")).is_none());
+        assert!(mirror_covering(folders(), Path::new("/home/u/Docs2/x")).is_none());
+    }
+
+    #[test]
+    fn mirror_covering_refuses_a_path_that_climbs_out() {
+        let folders = vec![folder(1, "/home/u/Docs", "mirror")];
+        assert!(mirror_covering(folders, Path::new("/home/u/Docs/../etc")).is_none());
+    }
+
+    #[test]
+    fn join_rel_names_a_child_of_the_folder_root_without_a_slash() {
+        assert_eq!(join_rel("", "a"), "a");
+        assert_eq!(join_rel("x/y", "a"), "x/y/a");
+    }
+
+    #[test]
+    fn a_local_rename_never_replaces_what_is_already_there() {
+        let dir = std::env::temp_dir().join(format!("pdfs-relocate-{}", std::process::id()));
+        let _ = std::fs::remove_dir_all(&dir);
+        std::fs::create_dir_all(&dir).unwrap();
+        let (a, b, c) = (dir.join("a"), dir.join("b"), dir.join("c"));
+        std::fs::write(&a, b"moved").unwrap();
+        std::fs::write(&b, b"kept").unwrap();
+
+        let err = rename_noreplace(&a, &b).unwrap_err();
+        assert_eq!(err.raw_os_error(), Some(libc::EEXIST));
+        assert_eq!(std::fs::read(&b).unwrap(), b"kept");
+        assert!(a.exists());
+
+        rename_noreplace(&a, &c).unwrap();
+        assert!(!a.exists());
+        assert_eq!(std::fs::read(&c).unwrap(), b"moved");
+        std::fs::remove_dir_all(&dir).unwrap();
+    }
+}
@@ -232,7 +232,7 @@ impl Core {
        let mut out = std::io::BufWriter::new(file);
        let written = match self
            .rt
-            .block_on(self.client.download_revision_to(uid, revision_id, &mut out))
+            .block_on(self.drive.download_revision_to(uid, revision_id, &mut out))
            .map_err(|e| CoreError::from_api(&e, "download revision"))
            .and_then(|()| {
                use std::io::Write as _;
@@ -21,7 +21,7 @@ use proton_drive_rs::{MemberRole, NodeKind};

 use proton_drive_rs::Node;

-use super::{Core, ROOT_INO, node_size, parse_uid, public_link_info, role_from_str, role_to_str};
+use super::{Core, node_size, parse_uid, public_link_info, role_from_str, role_to_str};

 /// A node from a *shared* listing as a [`DirEntry`].
 ///
@@ -73,6 +73,8 @@ fn shared_entry_of(core: &Core, n: Node) -> DirEntry {
        shared_by,
        shared_at,
        shared_by_unverified,
+        trashed_at: 0,
+        trashed_from: None,
    }
 }

@@ -388,6 +390,66 @@ impl Core {
            .map_err(|e| CoreError::from_api(&e, "remove public link"))
    }

+    /// Stop sharing the node at `rel`: remove its public link, then every
+    /// external invitation, Proton invitation and member. The SDK has no call
+    /// that deletes a share outright, so this composes the per-entry ones.
+    pub(crate) fn stop_sharing(&self, rel: &Path) -> CoreResult<StopSharingOutcome> {
+        let (_ino, uid) = self.resolve(rel)?;
+        self.stop_sharing_for_uid(&uid)
+    }
+
+    /// [`Core::stop_sharing`] for a node addressed through any daemon location.
+    pub(crate) fn stop_sharing_by_uid(&self, uid: &str) -> CoreResult<StopSharingOutcome> {
+        let uid = self.resolve_anywhere(uid)?;
+        self.stop_sharing_for_uid(&uid)
+    }
+
+    /// Each step runs even when an earlier one failed, so a single stuck
+    /// member does not leave the public link up. The link goes first: it is the
+    /// widest exposure. Only a failure to list what is there fails the whole
+    /// request; a failed removal is counted in the outcome.
+    fn stop_sharing_for_uid(&self, uid: &NodeUid) -> CoreResult<StopSharingOutcome> {
+        let mut outcome = StopSharingOutcome::default();
+        let link = self
+            .rt
+            .block_on(self.client.get_public_link(uid))
+            .map_err(|e| CoreError::from_api(&e, "get public link"))?;
+        if let Some(link) = link {
+            let result = self.rt.block_on(self.client.remove_public_link(&link));
+            outcome.record("the public link", result);
+        }
+        let external = self
+            .rt
+            .block_on(self.client.list_external_invitations(uid))
+            .map_err(|e| CoreError::from_api(&e, "list external invitations"))?;
+        for ext in external {
+            let result = self
+                .rt
+                .block_on(self.client.delete_external_invitation(&ext));
+            outcome.record(&ext.invitee_email, result);
+        }
+        let invitations = self
+            .rt
+            .block_on(self.client.list_share_invitations(uid))
+            .map_err(|e| CoreError::from_api(&e, "list invitations"))?;
+        for inv in invitations {
+            let result = self.rt.block_on(self.client.delete_invitation(&inv));
+            outcome.record(&inv.invitee_email, result);
+        }
+        let members = self
+            .rt
+            .block_on(self.client.list_share_members(uid))
+            .map_err(|e| CoreError::from_api(&e, "list members"))?;
+        for member in members {
+            let result = self.rt.block_on(self.client.remove_member(&member));
+            outcome.record(&member.email, result);
+        }
+        if !outcome.failed.is_empty() {
+            debug!(%uid, failed = ?outcome.failed, "stop sharing: some entries remain");
+        }
+        Ok(outcome)
+    }
+
    // ---- shared with me ---------------------------------------------------

    /// List nodes shared with me that I have accepted.
@@ -401,7 +463,7 @@ impl Core {
        }
        let nodes = self
            .rt
-            .block_on(self.client.enumerate_nodes(&uids))
+            .block_on(self.drive.enumerate_nodes(&uids))
            .map_err(|e| CoreError::from_api(&e, "enumerate nodes"))?;
        Ok(nodes
            .into_iter()
@@ -419,14 +481,14 @@ impl Core {
            parse_uid(uid).ok_or_else(|| CoreError::invalid(format!("invalid uid: {uid}")))?;
        let child_uids = self
            .rt
-            .block_on(self.client.enumerate_folder_children_node_uids(&uid))
+            .block_on(self.drive.enumerate_folder_children_node_uids(&uid))
            .map_err(|e| CoreError::from_api(&e, "enumerate shared children"))?;
        if child_uids.is_empty() {
            return Ok(Vec::new());
        }
        let nodes = self
            .rt
-            .block_on(self.client.enumerate_nodes(&child_uids))
+            .block_on(self.drive.enumerate_nodes(&child_uids))
            .map_err(|e| CoreError::from_api(&e, "enumerate nodes"))?;
        Ok(nodes
            .into_iter()
@@ -447,7 +509,7 @@ impl Core {
            parse_uid(uid).ok_or_else(|| CoreError::invalid(format!("invalid uid: {uid}")))?;
        let node = self
            .rt
-            .block_on(self.client.get_node(&uid))
+            .block_on(self.drive.get_node(&uid))
            .map_err(|e| CoreError::from_api(&e, "get shared node"))?
            .ok_or_else(|| CoreError::not_found("shared node not found"))?;
        if !node.is_file() {
@@ -548,10 +610,10 @@ impl Core {
    /// Proton products (not Drive-only). A remote round-trip; nothing here is
    /// cached.
    pub(crate) fn account_quota(&self) -> CoreResult<(i64, i64)> {
-        let q = self
-            .rt
-            .block_on(self.client.quota())
-            .map_err(|e| CoreError::from_api(&e, "account quota"))?;
+        let q = self.block_on_bounded(self.drive.quota()).map_err(|e| {
+            self.lost_link(&e, "account quota");
+            CoreError::from_api(&e, "account quota")
+        })?;
        *self.quota.lock() = Some((std::time::Instant::now(), q.max_space, q.used_space));
        Ok((q.max_space, q.used_space))
    }
@@ -570,11 +632,22 @@ impl Core {
        {
            return Some((max_space, used_space));
        }
-        match self.account_quota() {
+        let last = || self.quota.lock().map(|(_, max, used)| (max, used));
+        if !self.is_online()
+            || self
+                .quota_refreshing
+                .swap(true, std::sync::atomic::Ordering::AcqRel)
+        {
+            return last();
+        }
+        let refreshed = self.account_quota();
+        self.quota_refreshing
+            .store(false, std::sync::atomic::Ordering::Release);
+        match refreshed {
            Ok(q) => Some(q),
            Err(error) => {
                debug!(%error, "account quota refresh failed; serving the last known figures");
-                self.quota.lock().map(|(_, max, used)| (max, used))
+                last()
            }
        }
    }
@@ -596,7 +669,7 @@ impl Core {
        }
        let nodes = self
            .rt
-            .block_on(self.client.enumerate_nodes(&uids))
+            .block_on(self.drive.enumerate_nodes(&uids))
            .map_err(|e| CoreError::from_api(&e, "enumerate nodes"))?;
        let mut items = Vec::with_capacity(nodes.len());
        for n in nodes {
@@ -641,33 +714,103 @@ impl Core {
    /// been seen through the mount (e.g. shared but not browsed to this session) —
    /// the caller then leaves the path empty.
    pub(crate) fn rel_path_for_uid(&self, uid: &NodeUid) -> Option<String> {
-        // Searched across every mount: a node browsed through a sync folder is
-        // interned in that fork's inode space, so the primary state alone had no
-        // entry for it and the caller silently showed an empty path
-        // (`docs/BUGS.md` B74). The path is relative to whichever mount holds
-        // it, which is the one the user reached it through.
-        let mut path = None;
-        self.for_each_state(|st| {
-            if path.is_some() {
-                return;
-            }
-            path = walk_to_root(st, uid);
-        });
-        path
+        // Relative to whichever root the node sits under: a node browsed
+        // through a sync folder is under that fork's root, not My Files
+        // (`docs/BUGS.md` B74).
+        walk_to_root(&self.state(), uid)
    }
 }

-/// Walk one inode space from `uid` up to its root, building the path. `None` if
-/// that mount has never interned the node, or if the chain breaks partway —
+/// What [`Core::stop_sharing`] managed to remove.
+#[derive(Debug, Default, PartialEq, Eq)]
+pub(crate) struct StopSharingOutcome {
+    /// Entries removed (the link, invitations and members alike).
+    pub(crate) removed: usize,
+    /// What could not be removed, by email (or "the public link"), with why.
+    pub(crate) failed: Vec<(String, String)>,
+}
+
+impl StopSharingOutcome {
+    fn record<E: std::fmt::Display>(&mut self, what: &str, result: Result<(), E>) {
+        match result {
+            Ok(()) => self.removed += 1,
+            Err(e) => self.failed.push((what.to_string(), e.to_string())),
+        }
+    }
+
+    /// The reply for the control socket: a sentence for a full success, an
+    /// error naming what is left otherwise.
+    pub(crate) fn into_result(self) -> Result<String, String> {
+        if self.failed.is_empty() {
+            return Ok(match self.removed {
+                0 => "it was not shared".to_string(),
+                1 => "stopped sharing: removed 1 entry".to_string(),
+                n => format!("stopped sharing: removed {n} entries"),
+            });
+        }
+        let left = self
+            .failed
+            .iter()
+            .map(|(what, why)| format!("{what} ({why})"))
+            .collect::<Vec<_>>()
+            .join(", ");
+        Err(format!(
+            "removed {} of {}; still shared: {left}",
+            self.removed,
+            self.removed + self.failed.len()
+        ))
+    }
+}
+
+/// Walk the tree from `uid` up to the root it sits under, building the path.
+/// `None` if the node has never been interned, or if the chain breaks partway —
 /// a broken chain is a missing path, never a partial one.
 fn walk_to_root(st: &super::State, uid: &NodeUid) -> Option<String> {
    let mut ino = *st.by_uid.get(uid)?;
    let mut parts = Vec::new();
-    while ino != ROOT_INO {
+    while !st.roots.contains(&ino) {
        let entry = st.entries.get(&ino)?;
+        // An orphan is its own parent without being a root.
+        if entry.parent == ino {
+            return None;
+        }
        parts.push(entry.node.name.clone());
        ino = entry.parent;
    }
    parts.reverse();
    Some(parts.join("/"))
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn stopping_a_share_that_is_gone_says_so() {
+        let outcome = StopSharingOutcome::default();
+        assert_eq!(outcome.into_result().unwrap(), "it was not shared");
+    }
+
+    #[test]
+    fn a_failed_removal_names_what_is_still_shared() {
+        let mut outcome = StopSharingOutcome::default();
+        outcome.record::<String>("the public link", Ok(()));
+        outcome.record("bob@example.com", Err("forbidden"));
+        outcome.record::<String>("carol@example.com", Ok(()));
+        assert_eq!(
+            outcome.into_result().unwrap_err(),
+            "removed 2 of 3; still shared: bob@example.com (forbidden)"
+        );
+    }
+
+    #[test]
+    fn a_full_removal_counts_the_entries() {
+        let mut outcome = StopSharingOutcome::default();
+        outcome.record::<String>("the public link", Ok(()));
+        outcome.record::<String>("bob@example.com", Ok(()));
+        assert_eq!(
+            outcome.into_result().unwrap(),
+            "stopped sharing: removed 2 entries"
+        );
+    }
+}
@@ -0,0 +1,423 @@
+//! One simulated daemon: a real FUSE mount on its own state directory, whose
+//! Drive is a [`FakeClient`].
+//!
+//! Everything the daemon does runs as in production (drain workers, sync
+//! engine, event feed, online probe, control socket) except what the host
+//! changes (`mount::Host::Simulation`): a channel stops it instead of a signal,
+//! and it does not index the developer's home.
+
+use std::io;
+use std::path::{Path, PathBuf};
+use std::sync::Arc;
+use std::sync::mpsc::SyncSender;
+use std::thread::JoinHandle;
+use std::time::{Duration, Instant};
+
+use pdfs_core::cache::ContentCache;
+use pdfs_core::config::AppConfig;
+use pdfs_core::control::{self, PendingOpInfo, Request, Response};
+use pdfs_core::db::Db;
+use proton_drive_rs::ProtonDriveClient;
+use proton_drive_rs::proton_sdk::config::ProtonClientConfiguration;
+use proton_drive_rs::proton_sdk::session::{PasswordMode, ProtonApiSession, ResumeParameters};
+
+use super::fake_drive::FakeClient;
+use crate::mount::{Host, MountOptions, MountOutcome, mount_with};
+
+/// How long a mount may take to come up.
+const MOUNT_DEADLINE: Duration = Duration::from_secs(20);
+
+/// How long a restart may wait for the last run to let go of its database.
+const LAST_RUN_DEADLINE: Duration = Duration::from_secs(30);
+
+pub(crate) struct Daemon {
+    pub(crate) client: FakeClient,
+    pub(crate) mountpoint: PathBuf,
+    dir: PathBuf,
+    socket: PathBuf,
+    stop: SyncSender<()>,
+    mount: Option<JoinHandle<io::Result<MountOutcome>>>,
+    rt: Option<tokio::runtime::Runtime>,
+}
+
+impl Daemon {
+    /// Mount a daemon on the state under `dir`, creating it on the first start.
+    /// A later start on the same `dir` is a restart: it finds the queue, the
+    /// cache and the database the last run left.
+    pub(crate) fn start(dir: &Path, client: FakeClient) -> io::Result<Self> {
+        log_to_test_output();
+        let mountpoint = dir.join("mnt");
+        let socket = dir.join("control.sock");
+        std::fs::create_dir_all(&mountpoint)?;
+        // A thread of the last run that is still in a request holds the
+        // database, and with it the single-writer lock, until it returns. A
+        // real restart waits for the old process to exit in the same way.
+        let mut db = Db::open(&dir.join("pdfs.db"));
+        let deadline = Instant::now() + LAST_RUN_DEADLINE;
+        while db
+            .as_ref()
+            .is_err_and(|error| error.to_string().contains("already using"))
+            && Instant::now() < deadline
+        {
+            std::thread::sleep(Duration::from_millis(100));
+            db = Db::open(&dir.join("pdfs.db"));
+        }
+        let db = Arc::new(db.map_err(io::Error::other)?);
+        let cache = ContentCache::open(dir.join("cache"), dir.join("pins.json"), 0, db.clone())
+            .map_err(io::Error::other)?;
+        let rt = tokio::runtime::Builder::new_multi_thread()
+            .worker_threads(4)
+            .enable_all()
+            .build()?;
+        let (stop, stopped) = std::sync::mpsc::sync_channel(1);
+        let mount = {
+            let drive = Arc::new(client.clone());
+            let handle = rt.handle().clone();
+            let mountpoint = mountpoint.clone();
+            let socket = socket.clone();
+            std::thread::Builder::new()
+                .name("sim-mount".into())
+                .spawn(move || {
+                    mount_with(
+                        offline_client(),
+                        drive,
+                        handle,
+                        &mountpoint,
+                        cache,
+                        &socket,
+                        db,
+                        MountOptions {
+                            username: "sim".into(),
+                            sweep_mode: AppConfig::default().resolved_conflict_sweep(),
+                            upload_limit: 0,
+                            download_limit: 0,
+                        },
+                        Host::Simulation(stopped),
+                    )
+                })?
+        };
+        let deadline = Instant::now() + MOUNT_DEADLINE;
+        while !is_mounted(&mountpoint) {
+            if mount.is_finished() {
+                return Err(match mount.join() {
+                    Ok(Err(error)) => error,
+                    _ => io::Error::other("mount ended before it came up"),
+                });
+            }
+            if Instant::now() > deadline {
+                return Err(io::Error::other("mount did not come up"));
+            }
+            std::thread::sleep(Duration::from_millis(20));
+        }
+        Ok(Self {
+            client,
+            mountpoint,
+            dir: dir.to_path_buf(),
+            socket,
+            stop,
+            mount: Some(mount),
+            rt: Some(rt),
+        })
+    }
+
+    /// What the daemon still owes Drive, as `pdfs sync queue` shows it.
+    pub(crate) fn pending(&self) -> io::Result<Vec<PendingOpInfo>> {
+        match control::send(&self.socket, &Request::ListPendingOps).map_err(io::Error::other)? {
+            Response::PendingOps { items } => Ok(items),
+            other => Err(io::Error::other(format!("unexpected answer {other:?}"))),
+        }
+    }
+
+    /// Stop the daemon and start it again on the same state and link.
+    pub(crate) fn restart(mut self) -> io::Result<Self> {
+        self.shut_down()?;
+        Self::start(&self.dir.clone(), self.client.clone())
+    }
+
+    /// Stop the daemon the way `systemctl --user stop` does.
+    pub(crate) fn stop(mut self) -> io::Result<MountOutcome> {
+        self.shut_down()
+    }
+
+    fn shut_down(&mut self) -> io::Result<MountOutcome> {
+        let Some(mount) = self.mount.take() else {
+            return Ok(MountOutcome::Shutdown);
+        };
+        let _ = self.stop.try_send(());
+        let outcome = mount
+            .join()
+            .unwrap_or_else(|_| Err(io::Error::other("mount thread panicked")));
+        if let Some(rt) = self.rt.take() {
+            rt.shutdown_timeout(Duration::from_secs(5));
+        }
+        outcome
+    }
+}
+
+impl Drop for Daemon {
+    fn drop(&mut self) {
+        let _ = self.shut_down();
+    }
+}
+
+/// Whether a file system is mounted at `path`: it sits on another device than
+/// its parent.
+fn is_mounted(path: &Path) -> bool {
+    use std::os::unix::fs::MetadataExt;
+    let device = |path: &Path| std::fs::metadata(path).map(|meta| meta.dev()).ok();
+    let parent = path.parent().and_then(device);
+    device(path).is_some_and(|dev| Some(dev) != parent)
+}
+
+/// The daemons' logs, filtered by `RUST_LOG` and shown with `--nocapture`.
+/// What they log at `INFO` and above is also kept for [`take_logged`],
+/// whatever the filter.
+fn log_to_test_output() {
+    use tracing_subscriber::prelude::*;
+    let _ = tracing_subscriber::registry()
+        .with(
+            tracing_subscriber::fmt::layer()
+                .with_test_writer()
+                .with_filter(tracing_subscriber::EnvFilter::from_default_env()),
+        )
+        .with(KeepLogged.with_filter(tracing_subscriber::filter::LevelFilter::INFO))
+        .try_init();
+}
+
+/// What the daemons logged at `INFO` and above since the last call, each as
+/// its message followed by its fields: `message key=value ...`.
+pub(crate) fn take_logged() -> Vec<String> {
+    std::mem::take(&mut *LOGGED.lock())
+}
+
+static LOGGED: parking_lot::Mutex<Vec<String>> = parking_lot::Mutex::new(Vec::new());
+
+struct KeepLogged;
+
+impl<S: tracing::Subscriber> tracing_subscriber::Layer<S> for KeepLogged {
+    fn on_event(&self, event: &tracing::Event<'_>, _: tracing_subscriber::layer::Context<'_, S>) {
+        let mut message = Message(String::new());
+        event.record(&mut message);
+        LOGGED.lock().push(message.0);
+    }
+}
+
+struct Message(String);
+
+impl tracing::field::Visit for Message {
+    fn record_debug(&mut self, field: &tracing::field::Field, value: &dyn std::fmt::Debug) {
+        if field.name() == "message" {
+            self.0.insert_str(0, &format!("{value:?}"));
+        } else {
+            self.0.push_str(&format!(" {}={value:?}", field.name()));
+        }
+    }
+}
+
+/// A client for what `DriveApi` does not cover (sharing, Photos, devices),
+/// pointed at a closed local port so none of it leaves the machine.
+fn offline_client() -> ProtonDriveClient {
+    let config = ProtonClientConfiguration::new("external-drive-pdfs-sim@0.0.0-dev")
+        .with_base_url("http://127.0.0.1:9");
+    let session = ProtonApiSession::resume(
+        config,
+        ResumeParameters {
+            session_id: "sim".to_owned().into(),
+            username: "sim".into(),
+            user_id: "sim".to_owned().into(),
+            access_token: String::new(),
+            refresh_token: String::new(),
+            scopes: Vec::new(),
+            is_waiting_for_second_factor_code: false,
+            password_mode: PasswordMode::Single,
+        },
+    )
+    .expect("an offline session needs no network");
+    ProtonDriveClient::new(&session, Vec::new())
+}
+
+/// A fresh directory for one simulation, under the system temp dir.
+pub(crate) fn scratch(label: &str) -> PathBuf {
+    use std::sync::atomic::{AtomicU64, Ordering};
+    static N: AtomicU64 = AtomicU64::new(0);
+    let dir = std::env::temp_dir().join(format!(
+        "pdfs-sim-{label}-{}-{}",
+        std::process::id(),
+        N.fetch_add(1, Ordering::Relaxed)
+    ));
+    let _ = std::fs::remove_dir_all(&dir);
+    std::fs::create_dir_all(&dir).expect("create a simulation directory");
+    dir
+}
+
+/// Wait up to `limit` for `done`, polling.
+pub(crate) fn wait_until(limit: Duration, mut done: impl FnMut() -> bool) -> bool {
+    let deadline = Instant::now() + limit;
+    loop {
+        if done() {
+            return true;
+        }
+        if Instant::now() > deadline {
+            return false;
+        }
+        std::thread::sleep(Duration::from_millis(50));
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::sim::fake_drive::{Entry, FakeDrive, Faults};
+
+    #[test]
+    #[ignore = "mounts FUSE: run with `cargo test -p pdfs-fuse sim:: -- --ignored`"]
+    fn a_daemon_on_the_fake_drive_syncs_both_ways() {
+        let drive = FakeDrive::new();
+        let dir = scratch("smoke");
+        let daemon = Daemon::start(&dir, drive.client(1, Faults::lan())).unwrap();
+
+        std::fs::write(daemon.mountpoint.join("hello.txt"), b"hi").unwrap();
+        assert!(
+            wait_until(Duration::from_secs(30), || {
+                drive.tree().get("hello.txt") == Some(&Entry::File(Arc::new(b"hi".to_vec())))
+            }),
+            "a local write landed on Drive: {:?}",
+            drive.tree()
+        );
+
+        drive.device().write("phone.txt", b"from the phone");
+        let remote = daemon.mountpoint.join("phone.txt");
+        assert!(
+            wait_until(Duration::from_secs(30), || {
+                std::fs::read(&remote).ok().as_deref() == Some(b"from the phone".as_slice())
+            }),
+            "a remote write reached the mount"
+        );
+
+        daemon.client.set_online(false);
+        std::fs::write(daemon.mountpoint.join("offline.txt"), b"queued").unwrap();
+        std::thread::sleep(Duration::from_secs(2));
+        assert!(!drive.tree().contains_key("offline.txt"));
+        daemon.client.set_online(true);
+        assert!(
+            wait_until(Duration::from_secs(60), || drive
+                .tree()
+                .contains_key("offline.txt")),
+            "a write made offline landed once the link came back"
+        );
+
+        assert!(matches!(daemon.stop(), Ok(MountOutcome::Shutdown)));
+        let _ = std::fs::remove_dir_all(&dir);
+    }
+
+    /// Write `bytes` at `offset` into an existing file, without truncating it.
+    fn write_at(path: &Path, offset: u64, bytes: &[u8]) -> io::Result<()> {
+        use std::os::unix::fs::FileExt;
+        std::fs::OpenOptions::new()
+            .write(true)
+            .open(path)?
+            .write_all_at(bytes, offset)
+    }
+
+    #[test]
+    #[ignore = "mounts FUSE: run with `cargo test -p pdfs-fuse sim:: -- --ignored`"]
+    fn a_file_closed_empty_takes_a_second_write_at_once() {
+        // The empty revision never counted as complete, so the next write
+        // open before it drained was refused with EIO (B123).
+        let drive = FakeDrive::new();
+        let dir = scratch("empty-rewrite");
+        let daemon = Daemon::start(&dir, drive.client(1, Faults::lan())).unwrap();
+
+        let path = daemon.mountpoint.join("empty.txt");
+        std::fs::write(&path, b"old").unwrap();
+        assert!(wait_until(Duration::from_secs(30), || {
+            drive.tree().contains_key("empty.txt")
+        }));
+        std::fs::write(&path, b"").unwrap();
+        write_at(&path, 0, b"filled").unwrap();
+        assert!(
+            wait_until(Duration::from_secs(30), || {
+                drive.tree().get("empty.txt") == Some(&Entry::File(Arc::new(b"filled".to_vec())))
+            }),
+            "the second write landed: {:?}",
+            drive.tree()
+        );
+
+        assert!(matches!(daemon.stop(), Ok(MountOutcome::Shutdown)));
+        let _ = std::fs::remove_dir_all(&dir);
+    }
+
+    #[test]
+    #[ignore = "mounts FUSE: run with `cargo test -p pdfs-fuse sim:: -- --ignored`"]
+    fn the_echo_of_our_own_rename_keeps_the_cached_bytes() {
+        // The echo read as someone else's change and evicted the bytes, so a
+        // partial write could not gap-fill, and the next write open on the
+        // file was refused with EIO (B123).
+        let drive = FakeDrive::new();
+        let dir = scratch("rename-echo");
+        let daemon = Daemon::start(&dir, drive.client(1, Faults::lan())).unwrap();
+
+        let before = daemon.mountpoint.join("a.txt");
+        std::fs::write(&before, b"0123456789").unwrap();
+        assert!(wait_until(Duration::from_secs(30), || {
+            drive.tree().contains_key("a.txt")
+        }));
+        assert_eq!(std::fs::read(&before).unwrap(), b"0123456789");
+        let after = daemon.mountpoint.join("b.txt");
+        std::fs::rename(&before, &after).unwrap();
+        // Long enough for the next event poll to bring the echo.
+        std::thread::sleep(crate::POLL_INTERVAL + Duration::from_secs(3));
+
+        write_at(&after, 3, b"x").unwrap();
+        write_at(&after, 5, b"y").unwrap();
+        assert!(
+            wait_until(Duration::from_secs(30), || {
+                drive.tree().get("b.txt") == Some(&Entry::File(Arc::new(b"012x4y6789".to_vec())))
+            }),
+            "both writes landed: {:?}",
+            drive.tree()
+        );
+
+        assert!(matches!(daemon.stop(), Ok(MountOutcome::Shutdown)));
+        let _ = std::fs::remove_dir_all(&dir);
+    }
+
+    #[test]
+    #[ignore = "mounts FUSE: run with `cargo test -p pdfs-fuse sim:: -- --ignored`"]
+    fn a_rename_across_folders_ignores_the_new_name_in_the_old_folder() {
+        // The rename went to Drive as a rename in the old folder and then a
+        // move, so a sibling there with the new name failed it with EIO
+        // (B122).
+        let drive = FakeDrive::new();
+        let dir = scratch("rename-across");
+        let daemon = Daemon::start(&dir, drive.client(1, Faults::lan())).unwrap();
+
+        let mount = &daemon.mountpoint;
+        std::fs::create_dir(mount.join("x")).unwrap();
+        std::fs::create_dir(mount.join("z")).unwrap();
+        std::fs::write(mount.join("x/f.txt"), b"moved").unwrap();
+        std::fs::write(mount.join("x/d"), b"sibling").unwrap();
+        std::fs::write(mount.join("z/d"), b"replaced").unwrap();
+        let file = |bytes: &[u8]| Some(Entry::File(Arc::new(bytes.to_vec())));
+        assert!(wait_until(Duration::from_secs(30), || {
+            let tree = drive.tree();
+            [
+                ("x/f.txt", b"moved".as_slice()),
+                ("x/d", b"sibling"),
+                ("z/d", b"replaced"),
+            ]
+            .iter()
+            .all(|(path, bytes)| tree.get(*path).cloned() == file(bytes))
+        }));
+
+        std::fs::rename(mount.join("x/f.txt"), mount.join("z/d")).unwrap();
+        assert_eq!(std::fs::read(mount.join("z/d")).unwrap(), b"moved");
+        let tree = drive.tree();
+        assert_eq!(tree.get("z/d").cloned(), file(b"moved"));
+        assert_eq!(tree.get("x/d").cloned(), file(b"sibling"));
+        assert!(!tree.contains_key("x/f.txt"));
+
+        assert!(matches!(daemon.stop(), Ok(MountOutcome::Shutdown)));
+        let _ = std::fs::remove_dir_all(&dir);
+    }
+}
@@ -0,0 +1,9 @@
+//! The simulation tests of `docs/MILESTONE-3.0.0.md` §8: a fake Drive with
+//! the faults the real one has, and the tools to drive daemons against it.
+
+pub(crate) mod daemon;
+pub(crate) mod fake_drive;
+pub(crate) mod model;
+pub(crate) mod rng;
+pub(crate) mod run;
+pub(crate) mod watchdog;
@@ -0,0 +1,445 @@
+//! The reference file system of the simulation (`docs/MILESTONE-3.0.0.md`
+//! §8.2, property 4): what each syscall a simulated client makes should
+//! answer, and the tree it should leave, on a POSIX file system.
+//!
+//! A [`Model`] covers one client's own folder; paths are relative to it. The
+//! same type is used for the trees read back from a mount and from Drive.
+
+use std::collections::BTreeMap;
+
+use super::rng::Rng;
+
+/// A tree by path: `None` is a folder, `Some` a file's content.
+pub(crate) type Tree = BTreeMap<String, Option<Vec<u8>>>;
+
+/// One file system call, or the few a program makes in a row.
+#[derive(Clone, Debug)]
+pub(crate) enum FsOp {
+    /// `open(O_CREAT | O_TRUNC)`, write `data`, close.
+    Create {
+        path: String,
+        data: Vec<u8>,
+    },
+    /// Open an existing file, write `data` at `offset` (past the end leaves
+    /// a hole), close.
+    Write {
+        path: String,
+        offset: u64,
+        data: Vec<u8>,
+    },
+    /// Open an existing file and `ftruncate` it to `len`.
+    Truncate {
+        path: String,
+        len: u64,
+    },
+    Mkdir {
+        path: String,
+    },
+    Rename {
+        from: String,
+        to: String,
+    },
+    Unlink {
+        path: String,
+    },
+    /// Open a file, unlink it, append `data`, read it all back, close.
+    UnlinkOpen {
+        path: String,
+        data: Vec<u8>,
+    },
+    Rmdir {
+        path: String,
+    },
+}
+
+impl FsOp {
+    /// The paths the op names, for the log.
+    pub(crate) fn describe(&self) -> String {
+        match self {
+            FsOp::Create { path, data } => format!("create {path} ({} bytes)", data.len()),
+            FsOp::Write { path, offset, data } => {
+                format!("write {path} at {offset} ({} bytes)", data.len())
+            }
+            FsOp::Truncate { path, len } => format!("truncate {path} to {len}"),
+            FsOp::Mkdir { path } => format!("mkdir {path}"),
+            FsOp::Rename { from, to } => format!("rename {from} -> {to}"),
+            FsOp::Unlink { path } => format!("unlink {path}"),
+            FsOp::UnlinkOpen { path, data } => {
+                format!("unlink {path} while open, then append {} bytes", data.len())
+            }
+            FsOp::Rmdir { path } => format!("rmdir {path}"),
+        }
+    }
+}
+
+/// The tree one client should have, and what its syscalls should answer.
+#[derive(Clone, Debug, Default)]
+pub(crate) struct Model {
+    tree: Tree,
+}
+
+/// Names are drawn from small pools, so ops collide: a create over an existing
+/// file, a rename over another, a mkdir of a name that is taken.
+const FILE_NAMES: [&str; 6] = ["a.txt", "b.txt", "c.bin", "d", "e.md", "f.txt"];
+const DIR_NAMES: [&str; 3] = ["x", "y", "z"];
+
+impl Model {
+    pub(crate) fn tree(&self) -> &Tree {
+        &self.tree
+    }
+
+    pub(crate) fn content(&self, path: &str) -> Option<&Vec<u8>> {
+        self.tree.get(path)?.as_ref()
+    }
+
+    /// What `op` should answer on a POSIX file system, applying it on success.
+    pub(crate) fn apply(&mut self, op: &FsOp) -> Result<(), i32> {
+        match op {
+            FsOp::Create { path, data } => {
+                self.check_parent(path)?;
+                match self.tree.get(path) {
+                    Some(None) => Err(libc::EISDIR),
+                    _ => {
+                        self.tree.insert(path.clone(), Some(data.clone()));
+                        Ok(())
+                    }
+                }
+            }
+            FsOp::Write { path, offset, data } => {
+                let content = self.file_mut(path)?;
+                // Writing nothing changes nothing, even past the end.
+                if data.is_empty() {
+                    return Ok(());
+                }
+                let end = *offset as usize + data.len();
+                if content.len() < end {
+                    content.resize(end, 0);
+                }
+                content[*offset as usize..end].copy_from_slice(data);
+                Ok(())
+            }
+            FsOp::Truncate { path, len } => {
+                self.file_mut(path)?.resize(*len as usize, 0);
+                Ok(())
+            }
+            FsOp::Mkdir { path } => {
+                self.check_parent(path)?;
+                if self.tree.contains_key(path) {
+                    return Err(libc::EEXIST);
+                }
+                self.tree.insert(path.clone(), None);
+                Ok(())
+            }
+            FsOp::Rename { from, to } => self.rename(from, to),
+            FsOp::Unlink { path } | FsOp::UnlinkOpen { path, .. } => {
+                self.check_parent(path)?;
+                match self.tree.get(path) {
+                    None => Err(libc::ENOENT),
+                    Some(None) => Err(libc::EISDIR),
+                    Some(Some(_)) => {
+                        self.tree.remove(path);
+                        Ok(())
+                    }
+                }
+            }
+            FsOp::Rmdir { path } => {
+                self.check_parent(path)?;
+                match self.tree.get(path) {
+                    None => Err(libc::ENOENT),
+                    Some(Some(_)) => Err(libc::ENOTDIR),
+                    Some(None) if self.has_children(path) => Err(libc::ENOTEMPTY),
+                    Some(None) => {
+                        self.tree.remove(path);
+                        Ok(())
+                    }
+                }
+            }
+        }
+    }
+
+    fn rename(&mut self, from: &str, to: &str) -> Result<(), i32> {
+        self.check_parent(from)?;
+        let Some(moving) = self.tree.get(from).cloned() else {
+            return Err(libc::ENOENT);
+        };
+        self.check_parent(to)?;
+        if from == to {
+            return Ok(());
+        }
+        if is_below(to, from) {
+            return Err(libc::EINVAL);
+        }
+        match (&moving, self.tree.get(to)) {
+            (None, Some(Some(_))) => return Err(libc::ENOTDIR),
+            (Some(_), Some(None)) => return Err(libc::EISDIR),
+            (None, Some(None)) if self.has_children(to) => return Err(libc::ENOTEMPTY),
+            _ => {}
+        }
+        let below: Vec<(String, Option<Vec<u8>>)> = self
+            .tree
+            .iter()
+            .filter(|(path, _)| is_below(path, from))
+            .map(|(path, entry)| (path.clone(), entry.clone()))
+            .collect();
+        self.tree.remove(from);
+        self.tree.insert(to.to_owned(), moving);
+        for (path, entry) in below {
+            self.tree.remove(&path);
+            self.tree
+                .insert(format!("{to}{}", &path[from.len()..]), entry);
+        }
+        Ok(())
+    }
+
+    fn file_mut(&mut self, path: &str) -> Result<&mut Vec<u8>, i32> {
+        self.check_parent(path)?;
+        match self.tree.get_mut(path) {
+            None => Err(libc::ENOENT),
+            Some(None) => Err(libc::EISDIR),
+            Some(Some(content)) => Ok(content),
+        }
+    }
+
+    fn check_parent(&self, path: &str) -> Result<(), i32> {
+        let mut at = String::new();
+        let mut names = path.split('/').peekable();
+        while let Some(name) = names.next() {
+            if names.peek().is_none() {
+                break;
+            }
+            if !at.is_empty() {
+                at.push('/');
+            }
+            at.push_str(name);
+            match self.tree.get(&at) {
+                None => return Err(libc::ENOENT),
+                Some(Some(_)) => return Err(libc::ENOTDIR),
+                Some(None) => {}
+            }
+        }
+        Ok(())
+    }
+
+    fn has_children(&self, path: &str) -> bool {
+        self.tree.keys().any(|other| is_below(other, path))
+    }
+
+    pub(crate) fn files(&self) -> Vec<&String> {
+        self.tree
+            .iter()
+            .filter(|(_, entry)| entry.is_some())
+            .map(|(path, _)| path)
+            .collect()
+    }
+
+    /// Folders, the client's own root (`""`) first.
+    fn dirs(&self) -> Vec<String> {
+        std::iter::once(String::new())
+            .chain(
+                self.tree
+                    .iter()
+                    .filter(|(_, entry)| entry.is_none())
+                    .map(|(path, _)| path.clone()),
+            )
+            .collect()
+    }
+
+    /// A random op, mostly one that should succeed.
+    pub(crate) fn next_op(&self, rng: &mut Rng) -> FsOp {
+        let dirs = self.dirs();
+        let files = self.files();
+        let in_dir = |rng: &mut Rng, names: &[&str]| {
+            let parent = rng.pick(&dirs).expect("the root is always there");
+            join(parent, rng.pick(names).expect("names"))
+        };
+        let a_file = |rng: &mut Rng| rng.pick(&files).map(|path| (*path).clone());
+        let roll = rng.below(100);
+        let op = match roll {
+            0..30 => Some(FsOp::Create {
+                path: in_dir(rng, &FILE_NAMES),
+                data: data(rng),
+            }),
+            30..45 => a_file(rng).map(|path| {
+                let len = self.content(&path).map_or(0, Vec::len) as u64;
+                FsOp::Write {
+                    offset: rng.below(len + 8),
+                    path,
+                    data: data(rng),
+                }
+            }),
+            45..50 => a_file(rng).map(|path| FsOp::Truncate {
+                len: rng.below(32),
+                path,
+            }),
+            50..60 => Some(FsOp::Mkdir {
+                path: in_dir(rng, &DIR_NAMES),
+            }),
+            // A rename in place, over another file as often as not.
+            60..72 => a_file(rng).map(|from| FsOp::Rename {
+                to: join(parent_of(&from), rng.pick(&FILE_NAMES).expect("names")),
+                from,
+            }),
+            // A move to another folder, renamed or not.
+            72..82 => a_file(rng).map(|from| {
+                let name = if rng.chance(0.5) {
+                    name_of(&from)
+                } else {
+                    rng.pick(&FILE_NAMES).expect("names")
+                };
+                let parent = rng.pick(&dirs).expect("the root is always there");
+                FsOp::Rename {
+                    to: join(parent, name),
+                    from,
+                }
+            }),
+            // A folder renamed or moved, with what is in it.
+            82..86 => {
+                let from = rng.pick(&dirs[1..]).cloned();
+                from.map(|from| FsOp::Rename {
+                    to: in_dir(rng, &DIR_NAMES),
+                    from,
+                })
+            }
+            86..94 => a_file(rng).map(|path| FsOp::Unlink { path }),
+            94..97 => a_file(rng).map(|path| FsOp::UnlinkOpen {
+                path,
+                data: data(rng),
+            }),
+            _ => rng
+                .pick(&dirs[1..])
+                .cloned()
+                .map(|path| FsOp::Rmdir { path }),
+        };
+        op.unwrap_or_else(|| FsOp::Create {
+            path: in_dir(rng, &FILE_NAMES),
+            data: data(rng),
+        })
+    }
+}
+
+/// Content for a write: short and recognisable, now and then empty.
+pub(crate) fn data(rng: &mut Rng) -> Vec<u8> {
+    let len = if rng.chance(0.1) {
+        0
+    } else {
+        rng.between(1, 48)
+    };
+    let tag = rng.next_u64();
+    (0..len).map(|i| b'a' + ((tag + i) % 26) as u8).collect()
+}
+
+pub(crate) fn join(parent: &str, name: &str) -> String {
+    if parent.is_empty() {
+        name.to_owned()
+    } else {
+        format!("{parent}/{name}")
+    }
+}
+
+pub(crate) fn parent_of(path: &str) -> &str {
+    path.rsplit_once('/').map_or("", |(parent, _)| parent)
+}
+
+pub(crate) fn name_of(path: &str) -> &str {
+    path.rsplit_once('/').map_or(path, |(_, name)| name)
+}
+
+fn is_below(path: &str, ancestor: &str) -> bool {
+    path.len() > ancestor.len() + 1
+        && path.starts_with(ancestor)
+        && path.as_bytes()[ancestor.len()] == b'/'
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn create(path: &str, data: &[u8]) -> FsOp {
+        FsOp::Create {
+            path: path.into(),
+            data: data.to_vec(),
+        }
+    }
+
+    #[test]
+    fn a_rename_over_a_file_replaces_it_and_a_folder_moves_with_its_contents() {
+        let mut model = Model::default();
+        model.apply(&FsOp::Mkdir { path: "x".into() }).unwrap();
+        model.apply(&create("x/a", b"1")).unwrap();
+        model.apply(&create("b", b"2")).unwrap();
+        model
+            .apply(&FsOp::Rename {
+                from: "b".into(),
+                to: "x/a".into(),
+            })
+            .unwrap();
+        assert_eq!(model.content("x/a"), Some(&b"2".to_vec()));
+        model
+            .apply(&FsOp::Rename {
+                from: "x".into(),
+                to: "y".into(),
+            })
+            .unwrap();
+        assert_eq!(model.tree().keys().collect::<Vec<_>>(), vec!["y", "y/a"]);
+    }
+
+    #[test]
+    fn calls_fail_the_way_posix_says() {
+        let mut model = Model::default();
+        model.apply(&FsOp::Mkdir { path: "x".into() }).unwrap();
+        model.apply(&create("x/a", b"1")).unwrap();
+        assert_eq!(
+            model.apply(&FsOp::Mkdir { path: "x".into() }),
+            Err(libc::EEXIST)
+        );
+        assert_eq!(model.apply(&create("x", b"")), Err(libc::EISDIR));
+        assert_eq!(model.apply(&create("x/a/b", b"")), Err(libc::ENOTDIR));
+        assert_eq!(model.apply(&create("q/a", b"")), Err(libc::ENOENT));
+        assert_eq!(
+            model.apply(&FsOp::Rmdir { path: "x".into() }),
+            Err(libc::ENOTEMPTY)
+        );
+        assert_eq!(
+            model.apply(&FsOp::Unlink { path: "x".into() }),
+            Err(libc::EISDIR)
+        );
+        let into_itself = FsOp::Rename {
+            from: "x".into(),
+            to: "x/y".into(),
+        };
+        assert_eq!(model.apply(&into_itself), Err(libc::EINVAL));
+    }
+
+    #[test]
+    fn a_write_past_the_end_leaves_a_hole() {
+        let mut model = Model::default();
+        model.apply(&create("a", b"ab")).unwrap();
+        let write = FsOp::Write {
+            path: "a".into(),
+            offset: 4,
+            data: b"z".to_vec(),
+        };
+        model.apply(&write).unwrap();
+        assert_eq!(model.content("a"), Some(&b"ab\0\0z".to_vec()));
+        let nothing = FsOp::Write {
+            path: "a".into(),
+            offset: 9,
+            data: Vec::new(),
+        };
+        model.apply(&nothing).unwrap();
+        assert_eq!(model.content("a"), Some(&b"ab\0\0z".to_vec()));
+    }
+
+    #[test]
+    fn generated_ops_mostly_succeed() {
+        let mut rng = Rng::new(9);
+        let mut model = Model::default();
+        let ok = (0..500)
+            .filter(|_| {
+                let op = model.next_op(&mut rng);
+                model.apply(&op).is_ok()
+            })
+            .count();
+        assert!(ok > 350, "{ok} of 500 succeeded");
+    }
+}
@@ -0,0 +1,79 @@
+//! A small seeded random number generator, so a failing simulation is a seed
+//! that can be replayed. SplitMix64: fast, good enough for choosing operations
+//! and faults, and no dependency.
+
+#[derive(Clone, Debug)]
+pub(crate) struct Rng(u64);
+
+impl Rng {
+    pub(crate) fn new(seed: u64) -> Self {
+        Self(seed)
+    }
+
+    pub(crate) fn next_u64(&mut self) -> u64 {
+        self.0 = self.0.wrapping_add(0x9E37_79B9_7F4A_7C15);
+        let mut z = self.0;
+        z = (z ^ (z >> 30)).wrapping_mul(0xBF58_476D_1CE4_E5B9);
+        z = (z ^ (z >> 27)).wrapping_mul(0x94D0_49BB_1331_11EB);
+        z ^ (z >> 31)
+    }
+
+    /// A value in `0..n`; `0` when `n` is `0`.
+    pub(crate) fn below(&mut self, n: u64) -> u64 {
+        if n == 0 { 0 } else { self.next_u64() % n }
+    }
+
+    /// A value in `lo..=hi`.
+    pub(crate) fn between(&mut self, lo: u64, hi: u64) -> u64 {
+        lo + self.below(hi.saturating_sub(lo) + 1)
+    }
+
+    /// True with probability `p`.
+    pub(crate) fn chance(&mut self, p: f64) -> bool {
+        p > 0.0 && (self.next_u64() >> 11) as f64 / (1u64 << 53) as f64 <= p
+    }
+
+    pub(crate) fn pick<'a, T>(&mut self, items: &'a [T]) -> Option<&'a T> {
+        items.get(self.below(items.len() as u64) as usize)
+    }
+
+    /// A child generator, so one consumer's draws do not shift another's.
+    pub(crate) fn fork(&mut self) -> Self {
+        Self::new(self.next_u64())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Rng;
+
+    #[test]
+    fn a_seed_replays_the_same_sequence() {
+        let (mut a, mut b) = (Rng::new(7), Rng::new(7));
+        for _ in 0..100 {
+            assert_eq!(a.next_u64(), b.next_u64());
+        }
+        assert_ne!(Rng::new(7).next_u64(), Rng::new(8).next_u64());
+    }
+
+    #[test]
+    fn bounded_draws_stay_in_range() {
+        let mut rng = Rng::new(1);
+        for _ in 0..1000 {
+            assert!(rng.below(5) < 5);
+            assert!((3..=9).contains(&rng.between(3, 9)));
+        }
+        assert_eq!(rng.below(0), 0);
+        assert!(!rng.chance(0.0));
+        assert!(rng.chance(1.0));
+        assert!([1, 2, 3].contains(rng.pick(&[1, 2, 3]).unwrap()));
+        assert_eq!(rng.pick::<u8>(&[]), None);
+    }
+
+    #[test]
+    fn a_fork_draws_apart_from_its_parent() {
+        let mut parent = Rng::new(3);
+        let mut child = parent.fork();
+        assert_ne!(parent.next_u64(), child.next_u64());
+    }
+}
@@ -0,0 +1,322 @@
+//! Turns a call through a mount that never returns into a failed seed.
+//!
+//! A deadlock in a daemon leaves the run's own thread blocked in the kernel,
+//! where no budget check is reached, and a CI job then waits for its timeout.
+//! The watchdog runs beside the run. When what it was armed for outlives its
+//! limit, it aborts the FUSE connections of the run's mounts, so the blocked
+//! call fails and the run reports the hang, and writes where every thread was
+//! to `stacks.txt`.
+//!
+//! The stacks are taken in the process: no tracer can stop a thread that
+//! waits on a FUSE request, so `gdb` and `eu-stack` wait as long as the hang.
+//! Each thread is sent [`stack_signal`] and captures its own backtrace in the
+//! handler. A thread in the kernel takes the signal only once it leaves, so
+//! the mounts are aborted after the others have answered, and its backtrace
+//! is the call it was blocked in. Its kernel wait channel is recorded first.
+
+use std::collections::BTreeMap;
+use std::path::{Path, PathBuf};
+use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::thread::JoinHandle;
+use std::time::{Duration, Instant};
+
+use parking_lot::Mutex;
+
+use super::daemon::wait_until;
+
+/// How long the threads that are not blocked in the kernel have to answer,
+/// and the blocked ones once the mounts are aborted.
+const ANSWER: Duration = Duration::from_secs(5);
+
+pub(crate) struct Watchdog {
+    shared: Arc<Shared>,
+    thread: Option<JoinHandle<()>>,
+}
+
+struct Shared {
+    /// The run's directory: its mounts are below it, and the stacks go in it.
+    dir: PathBuf,
+    armed: Mutex<Option<Armed>>,
+    /// What hung, once something has.
+    fired: Mutex<Option<Hung>>,
+    stop: AtomicBool,
+}
+
+struct Armed {
+    what: String,
+    limit: Duration,
+    since: Instant,
+}
+
+/// What hung, and where every thread was then.
+#[derive(Clone, Debug, PartialEq)]
+pub(crate) struct Hung {
+    pub(crate) what: String,
+    pub(crate) stacks: String,
+}
+
+/// Disarms the watchdog when dropped.
+pub(crate) struct Watching(Arc<Shared>);
+
+impl Watchdog {
+    pub(crate) fn new(dir: &Path) -> Self {
+        let shared = Arc::new(Shared {
+            dir: dir.to_path_buf(),
+            armed: Mutex::new(None),
+            fired: Mutex::new(None),
+            stop: AtomicBool::new(false),
+        });
+        let thread = {
+            let shared = shared.clone();
+            std::thread::Builder::new()
+                .name("sim-watchdog".into())
+                .spawn(move || watch(&shared))
+                .expect("spawn the simulation watchdog")
+        };
+        Self {
+            shared,
+            thread: Some(thread),
+        }
+    }
+
+    /// Watch `what` until the guard is dropped, and abort the mounts if it is
+    /// still going after `limit`.
+    pub(crate) fn arm(&self, limit: Duration, what: impl Into<String>) -> Watching {
+        *self.shared.armed.lock() = Some(Armed {
+            what: what.into(),
+            limit,
+            since: Instant::now(),
+        });
+        Watching(self.shared.clone())
+    }
+
+    /// What hung, if something did. Call [`Watchdog::stop`] first, or the
+    /// stacks may still be on their way.
+    pub(crate) fn fired(&self) -> Option<Hung> {
+        self.shared.fired.lock().clone()
+    }
+
+    /// Stop watching, once the stacks of a hang that was caught are taken.
+    pub(crate) fn stop(&mut self) {
+        self.shared.stop.store(true, Ordering::Relaxed);
+        if let Some(thread) = self.thread.take() {
+            let _ = thread.join();
+        }
+    }
+}
+
+impl Drop for Watching {
+    fn drop(&mut self) {
+        *self.0.armed.lock() = None;
+    }
+}
+
+impl Drop for Watchdog {
+    fn drop(&mut self) {
+        self.stop();
+    }
+}
+
+fn watch(shared: &Shared) {
+    while !shared.stop.load(Ordering::Relaxed) {
+        std::thread::sleep(Duration::from_millis(200));
+        let hung = shared
+            .armed
+            .lock()
+            .as_ref()
+            .filter(|armed| armed.since.elapsed() > armed.limit)
+            .map(|armed| format!("{} has not returned after {:?}", armed.what, armed.limit));
+        let Some(hung) = hung else { continue };
+        *shared.armed.lock() = None;
+        let path = shared.dir.join("stacks.txt");
+        // Before anything is let go: the run reports the hang, not whatever
+        // the aborted call answers.
+        *shared.fired.lock() = Some(Hung {
+            what: format!("{hung}; the stacks are in {}", path.display()),
+            stacks: String::new(),
+        });
+        let stacks = take_stacks(|| abort_mounts_below(&shared.dir));
+        let what = match std::fs::write(&path, &stacks) {
+            Ok(()) => format!("{hung}; the stacks are in {}", path.display()),
+            Err(error) => format!("{hung}; the stacks could not be kept: {error}"),
+        };
+        *shared.fired.lock() = Some(Hung { what, stacks });
+    }
+}
+
+/// One thread of this process as the kernel sees it.
+struct Task {
+    tid: i32,
+    name: String,
+    /// `D` while it waits in the kernel uninterruptibly.
+    state: String,
+    wchan: String,
+}
+
+/// Where every other thread of this process is, with `release` called once
+/// those not blocked in the kernel have answered.
+fn take_stacks(release: impl FnOnce()) -> String {
+    let own = gettid();
+    let tasks = tasks();
+    STACKS.lock().clear();
+    install_stack_handler();
+    for task in &tasks {
+        if task.tid != own {
+            // SAFETY: tgkill only sends a signal, whose handler is installed.
+            unsafe {
+                libc::syscall(
+                    libc::SYS_tgkill,
+                    std::process::id() as i32,
+                    task.tid,
+                    stack_signal(),
+                )
+            };
+        }
+    }
+    let answered = |blocked: bool| {
+        let stacks = STACKS.lock();
+        tasks
+            .iter()
+            .filter(|task| task.tid != own && (blocked || task.state != "D"))
+            .all(|task| stacks.contains_key(&task.tid))
+    };
+    wait_until(ANSWER, || answered(false));
+    release();
+    wait_until(ANSWER, || answered(true));
+    let stacks = std::mem::take(&mut *STACKS.lock());
+    let mut out = String::new();
+    for task in tasks.iter().filter(|task| task.tid != own) {
+        out.push_str(&format!(
+            "thread {} {:?}, state {}, waiting in {}\n",
+            task.tid, task.name, task.state, task.wchan
+        ));
+        match stacks.get(&task.tid) {
+            Some(stack) => out.push_str(&format!("{stack}\n")),
+            None => out.push_str("  (no answer)\n\n"),
+        }
+    }
+    out
+}
+
+fn tasks() -> Vec<Task> {
+    let Ok(entries) = std::fs::read_dir("/proc/self/task") else {
+        return Vec::new();
+    };
+    let read = |dir: &Path, file: &str| {
+        std::fs::read_to_string(dir.join(file))
+            .unwrap_or_default()
+            .trim()
+            .to_owned()
+    };
+    entries
+        .flatten()
+        .filter_map(|entry| {
+            let tid = entry.file_name().to_str()?.parse().ok()?;
+            let dir = entry.path();
+            // The state follows the name in parentheses, which may hold spaces.
+            let stat = read(&dir, "stat");
+            let state = stat.rsplit_once(") ")?.1.split(' ').next()?.to_owned();
+            Some(Task {
+                tid,
+                name: read(&dir, "comm"),
+                state,
+                wchan: read(&dir, "wchan"),
+            })
+        })
+        .collect()
+}
+
+/// The backtraces the threads captured, by thread id.
+static STACKS: Mutex<BTreeMap<i32, std::backtrace::Backtrace>> = Mutex::new(BTreeMap::new());
+
+/// The signal that asks a thread for its stack: one of the real-time signals
+/// that nothing in the daemon uses.
+fn stack_signal() -> i32 {
+    libc::SIGRTMIN() + 7
+}
+
+fn install_stack_handler() {
+    static INSTALLED: std::sync::Once = std::sync::Once::new();
+    extern "C" fn handler(_: i32) {
+        // Not async-signal-safe: the capture allocates. The process is being
+        // taken down for a hang anyway, and a thread interrupted inside the
+        // allocator only fails to answer.
+        let stack = std::backtrace::Backtrace::force_capture();
+        STACKS.lock().insert(gettid(), stack);
+    }
+    INSTALLED.call_once(|| {
+        // SAFETY: a zeroed sigaction with a handler and SA_RESTART is valid,
+        // and the handler only touches `STACKS`.
+        unsafe {
+            let mut action: libc::sigaction = std::mem::zeroed();
+            action.sa_sigaction = handler as extern "C" fn(i32) as usize;
+            action.sa_flags = libc::SA_RESTART;
+            libc::sigemptyset(&mut action.sa_mask);
+            libc::sigaction(stack_signal(), &action, std::ptr::null_mut());
+        }
+    });
+}
+
+fn gettid() -> i32 {
+    // SAFETY: gettid has no arguments and cannot fail.
+    unsafe { libc::gettid() }
+}
+
+/// Abort the FUSE connection of every mount below `dir`. Its connection is
+/// named by the mount's device minor, and the mount's owner may abort it.
+fn abort_mounts_below(dir: &Path) {
+    let Ok(mountinfo) = std::fs::read_to_string("/proc/self/mountinfo") else {
+        return;
+    };
+    for line in mountinfo.lines() {
+        let fields: Vec<&str> = line.split(' ').collect();
+        let (Some(device), Some(mountpoint)) = (fields.get(2), fields.get(4)) else {
+            continue;
+        };
+        if !Path::new(mountpoint).starts_with(dir) {
+            continue;
+        }
+        if let Some((_, minor)) = device.split_once(':') {
+            let _ = std::fs::write(format!("/sys/fs/fuse/connections/{minor}/abort"), "1");
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::sim::daemon::scratch;
+
+    #[test]
+    #[ignore = "signals every thread of the test process: run with `cargo test -p pdfs-fuse sim:: -- --ignored`"]
+    fn a_call_past_its_limit_is_reported_with_the_stacks() {
+        let dir = scratch("watchdog");
+        let mut watchdog = Watchdog::new(&dir);
+        {
+            let _watching = watchdog.arm(Duration::from_millis(100), "a nap");
+            std::thread::sleep(Duration::from_secs(1));
+        }
+        watchdog.stop();
+        let hung = watchdog.fired().expect("the watchdog fired");
+        assert!(
+            hung.what.starts_with("a nap has not returned after"),
+            "{hung:?}"
+        );
+        assert!(hung.stacks.contains("a_call_past_its_limit"), "{hung:?}");
+        let kept = std::fs::read_to_string(dir.join("stacks.txt")).unwrap_or_default();
+        assert_eq!(kept, hung.stacks);
+        let _ = std::fs::remove_dir_all(&dir);
+    }
+
+    #[test]
+    fn a_call_within_its_limit_is_not() {
+        let dir = scratch("watchdog-quiet");
+        let watchdog = Watchdog::new(&dir);
+        drop(watchdog.arm(Duration::from_millis(100), "a quick call"));
+        std::thread::sleep(Duration::from_millis(500));
+        assert_eq!(watchdog.fired(), None);
+        drop(watchdog);
+        let _ = std::fs::remove_dir_all(&dir);
+    }
+}
@@ -128,6 +128,61 @@ pub(crate) struct WriteHandle {
    pub(crate) open_count: usize,
 }

+impl WriteHandle {
+    /// A handle on a file `create` just made: an empty base, so everything
+    /// written through it is authored.
+    ///
+    /// The base is `node` as it actually exists — the empty file the server just
+    /// minted, or a queued create's placeholder — never the local clock or a
+    /// blank. `queue_revision` turns it into `StagedWrite::based_on` and the
+    /// drain compares the remote against that. A `now_secs()` mtime differs from
+    /// the server's stamp by the create round-trip. A missing revision id drops
+    /// the check to `(mtime, size)`, and moving or renaming the file advances
+    /// its mtime on the server. Either way the first write to a brand-new file
+    /// lands as a conflict copy of its own empty create (`docs/BUGS.md` B113).
+    pub(crate) fn created(ino: u64, node: &Node, file: File, path: PathBuf) -> Self {
+        Self {
+            ino,
+            uid: node.uid.clone(),
+            file: Arc::new(file),
+            path,
+            written: Intervals::default(),
+            len: 0,
+            base_size: 0,
+            base_mtime: node.modification_time,
+            base_revision_id: crate::node_revision_id(node),
+            dirty: false,
+            open_count: 0,
+        }
+    }
+
+    /// Write over `node` from now on: a revision this daemon has just put on the
+    /// server under the handle, by sealing an upload or by landing the queued
+    /// create the handle was opened on. The base the handle opened over is gone,
+    /// and keeping it would make the drain read our own revision as another
+    /// device's edit.
+    pub(crate) fn rebase_onto(&mut self, node: &Node) {
+        self.base_mtime = node.modification_time;
+        self.base_size = crate::node_size(node);
+        self.base_revision_id = crate::node_revision_id(node);
+    }
+
+    /// Account for `[offset, end)` having been written through this handle.
+    ///
+    /// A write past the end leaves a hole that reads as zeros, exactly like a
+    /// grow through `setattr`, so the hole is authored too. Left unauthored, a
+    /// hole below the base size was refilled from the base at commit: a file
+    /// shrunk and then written past its new end got its old bytes back.
+    pub(crate) fn record_write(&mut self, offset: u64, end: u64) {
+        if offset > self.len {
+            self.written.add(self.len, offset);
+        }
+        self.written.add(offset, end);
+        self.len = self.len.max(end);
+        self.dirty = true;
+    }
+}
+
 /// A released write whose upload has not happened yet (offline.md Phase 3).
 ///
 /// The bytes live in the content cache's staging dir and the intent lives in the
@@ -146,8 +201,23 @@ pub(crate) struct PendingRevision {
 /// time so this module stays free of `fuser`.
 pub(crate) type DirListing = Vec<(u64, bool, String)>;

+/// Where [`State::next_ino`] starts: far above any local id a database hands
+/// out, so a fallback inode never names a node that has a row.
+pub(crate) const FALLBACK_INO: u64 = 1 << 48;
+
+/// The inode of the node with local id `lid` ([`Db::lids_for`]). One above the
+/// lid, so no node takes [`crate::ROOT_INO`], which each session uses for its
+/// own root. The same in every mount and after a restart.
+pub(crate) fn lid_ino(lid: i64) -> u64 {
+    lid.unsigned_abs() + crate::ROOT_INO
+}
+
 /// Mutable inode bookkeeping, guarded by a mutex because fuser drives the
 /// `Filesystem` trait through `&self`.
+///
+/// One tree for every mount of the daemon. Each FUSE session sees it from its
+/// own root ([`State::roots`]) and calls that root inode 1; `ProtonFs`
+/// translates at the kernel boundary.
 pub(crate) struct State {
    /// inode -> node metadata.
    pub(crate) entries: HashMap<u64, Entry>,
@@ -156,6 +226,12 @@ pub(crate) struct State {
    /// Cached directory listings: parent inode -> child inodes. Presence of a
    /// key means the directory has been enumerated.
    pub(crate) children: HashMap<u64, Vec<u64>>,
+    /// The inodes some session has been rooted at ([`State::install_root`]).
+    /// A root is its own parent. Kept after its session unmounts: the node is
+    /// still one of ours.
+    pub(crate) roots: HashSet<u64>,
+    /// The next inode for a node the database could not give a local id, from
+    /// a range lids never reach ([`FALLBACK_INO`]).
    pub(crate) next_ino: u64,
    /// Shared write state keyed by inode. Concurrent writers share the scratch file.
    pub(crate) active_writes: HashMap<u64, WriteHandle>,
@@ -177,7 +253,7 @@ pub(crate) struct State {
    /// intern/root refresh. Core drains this set and notifies the matching
    /// kernel only after releasing the State lock.
    pub(crate) access_changes: HashSet<u64>,
-    /// Persisted shared-root authority, loaded once per inode space and updated
+    /// Persisted shared-root authority, loaded once and updated
    /// on every explicit role/tombstone change. Descendant inheritance reads
    /// this map instead of issuing one SQLite query per interned inode.
    pub(crate) share_access: HashMap<NodeUid, Access>,
@@ -245,15 +321,6 @@ pub(crate) struct StateGuard<'a> {
    db: &'a Arc<Db>,
 }

-/// Take a mount's inode lock through a [`StateGuard`], for the loops that walk
-/// every live mount rather than this `Core`'s own.
-pub(crate) fn lock_state<'a>(
-    state: &'a parking_lot::Mutex<State>,
-    db: &'a Arc<Db>,
-) -> StateGuard<'a> {
-    StateGuard::new(state.lock(), db)
-}
-
 impl<'a> StateGuard<'a> {
    pub(crate) fn new(guard: parking_lot::MutexGuard<'a, State>, db: &'a Arc<Db>) -> Self {
        Self {
@@ -294,9 +361,6 @@ impl Drop for StateGuard<'_> {
 impl State {
    /// A fresh, empty inode space over `db`.
    ///
-    /// `next_ino` differs by caller: a real mount hands out [`crate::ROOT_INO`]
-    /// to its root and starts allocating above it, while a bare state under test
-    /// has no root and starts at 1.
    /// Apply the write-throughs this state owes SQLite, here and now.
    ///
    /// Production code never calls this: [`StateGuard`] releases the inode lock
@@ -323,12 +387,15 @@ impl State {
        self.db.clone()
    }

-    pub(crate) fn new(db: Arc<Db>, share_access: HashMap<NodeUid, Access>, next_ino: u64) -> Self {
+    /// A fresh, empty tree over `db`. A node's inode comes from its local id
+    /// ([`lid_ino`]).
+    pub(crate) fn new(db: Arc<Db>, share_access: HashMap<NodeUid, Access>) -> Self {
        Self {
            entries: HashMap::new(),
            by_uid: HashMap::new(),
            children: HashMap::new(),
-            next_ino,
+            roots: HashSet::new(),
+            next_ino: FALLBACK_INO,
            active_writes: HashMap::new(),
            handles: HashMap::new(),
            next_fh: 1,
@@ -339,18 +406,55 @@ impl State {
            outbox: Vec::new(),
        }
    }
-    /// Whether `uid` names an owned node currently reachable from this mount's
-    /// root. Resident entries can outlive their dentries for open-handle and
-    /// access-revocation semantics, so `by_uid` membership alone is not proof
-    /// that a control-socket operation may address the node.
-    pub(crate) fn owns_visible_uid(&self, uid: &NodeUid) -> bool {
-        let Some(root) = self.entries.get(&crate::ROOT_INO) else {
-            return false;
-        };
-        if uid.volume_id != root.uid.volume_id {
-            return false;
+    /// Make `root` the root of a session and return its inode, which comes
+    /// from its local id like any other node's.
+    ///
+    /// The root is always owned. It must never be classified as a shared root,
+    /// even when the API returns membership data (which happens when the owner
+    /// shares the folder with someone else), so a stale share row a downgrade
+    /// may have left for it is dropped. A node already in the tree keeps its
+    /// inode and its lookups, and stops naming a parent: a session's `..` at
+    /// its root is the root.
+    pub(crate) fn install_root(&mut self, root: Node) -> u64 {
+        if let Err(e) = self.db.upsert_node(&root) {
+            warn!(uid = %root.uid, error = %e, "db upsert root failed");
        }
+        self.share_access.remove(&root.uid);
+        let _ = self.db.delete_share_access(&root.uid);
+        let ino = match self.by_uid.get(&root.uid) {
+            Some(&ino) => ino,
+            None => self.new_inos(&[&root])[&root.uid],
+        };
+        if let Some(old) = self.entries.get(&ino).map(|e| e.parent)
+            && old != ino
+            && let Some(kids) = self.children.get_mut(&old)
+        {
+            kids.retain(|&k| k != ino);
+        }
+        self.by_uid.insert(root.uid.clone(), ino);
+        let lookup_count = self.entries.get(&ino).map_or(1, |e| e.lookup_count.max(1));
+        self.entries.insert(
+            ino,
+            Entry {
+                uid: root.uid.clone(),
+                parent: ino,
+                node: root,
+                access: Access::Owner,
+                lookup_count,
+                open_count: 0,
+                unlinked: false,
+            },
+        );
+        self.roots.insert(ino);
+        ino
+    }

+    /// Whether `uid` names an owned node currently reachable from one of
+    /// `roots`, the roots of the sessions that are mounted. Resident entries
+    /// can outlive their dentries for open-handle and access-revocation
+    /// semantics, so `by_uid` membership alone is not proof that a
+    /// control-socket operation may address the node.
+    pub(crate) fn owns_visible_uid(&self, uid: &NodeUid, roots: &[u64]) -> bool {
        let Some(&target) = self.by_uid.get(uid) else {
            return false;
        };
@@ -363,7 +467,9 @@ impl State {
            let Some(entry) = self.entries.get(&current) else {
                return false;
            };
-            if entry.uid.volume_id != root.uid.volume_id
+            // The node's root scopes it to its own volume, excluding foreign
+            // shared-with-me residents from uid-addressed sharing.
+            if entry.uid.volume_id != uid.volume_id
                || entry.unlinked
                || entry.node.trashed
                || entry.uid != entry.node.uid
@@ -371,7 +477,7 @@ impl State {
            {
                return false;
            }
-            if current == crate::ROOT_INO {
+            if roots.contains(&current) {
                return true;
            }

@@ -413,15 +519,17 @@ impl State {
        self.access_changes.drain().collect()
    }

-    /// Whether `uid` lives on the volume this mount is rooted in.
+    /// Whether `uid` lives on a volume some mount is rooted in.
    ///
    /// Used to decide how a node with no resolvable parent is classified:
    /// our own volume fails open (it is owned content), a foreign volume
    /// fails closed (it can only be there because of a share).
    pub(crate) fn is_own_volume(&self, uid: &NodeUid) -> bool {
-        self.entries
-            .get(&crate::ROOT_INO)
-            .is_some_and(|root| root.uid.volume_id == uid.volume_id)
+        self.roots.iter().any(|ino| {
+            self.entries
+                .get(ino)
+                .is_some_and(|root| root.uid.volume_id == uid.volume_id)
+        })
    }

    fn stored_share_access(&self, uid: &NodeUid) -> Option<Access> {
@@ -770,11 +878,54 @@ impl State {
        }
    }

-    pub(crate) fn intern(&mut self, parent: u64, node: Node) -> u64 {
+    pub(crate) fn intern(&mut self, parent: u64, mut node: Node) -> u64 {
+        self.keep_revision_mtime(&mut node);
        self.outbox.push(DbWrite::Upsert(vec![node.clone()]));
        self.intern_mem(parent, node)
    }

+    /// Keep what is already known of a file whose content has not changed.
+    ///
+    /// Drive stamps a link's `ModifyTime` on a rename or a move as well, while
+    /// POSIX leaves a file's mtime alone there. The content cache is keyed by
+    /// it, too: taking the new stamp made the cached bytes unreachable, so the
+    /// next partial write could not fill its gaps (docs/BUGS.md B123). The
+    /// active revision id says whether the content is still the same, and so
+    /// whether the size and digest a listing left out are still the ones known.
+    fn keep_revision_mtime(&self, node: &mut Node) {
+        let Some(entry) = self
+            .by_uid
+            .get(&node.uid)
+            .and_then(|ino| self.entries.get(ino))
+        else {
+            return;
+        };
+        if let (
+            NodeKind::File {
+                active_revision_id: Some(now),
+                claimed_size,
+                content_sha1,
+                ..
+            },
+            NodeKind::File {
+                active_revision_id: Some(was),
+                claimed_size: size_was,
+                content_sha1: sha1_was,
+                ..
+            },
+        ) = (&mut node.kind, &entry.node.kind)
+            && now == was
+        {
+            node.modification_time = entry.node.modification_time;
+            if claimed_size.is_none() {
+                *claimed_size = *size_was;
+            }
+            if content_sha1.is_none() {
+                content_sha1.clone_from(sha1_was);
+            }
+        }
+    }
+
    /// Allocate (or reuse) a stable inode for a node, updating the hot-cache maps
    /// only. Every caller owes the DB a write-through — see the callers below;
    /// the split exists so a batch can pay for one transaction instead of `n`.
@@ -784,11 +935,24 @@ impl State {
    }

    fn intern_mem_with_access(&mut self, parent: u64, node: Node, access: Access) -> u64 {
+        self.intern_mem_at(parent, node, access, None)
+    }
+
+    /// [`State::intern_mem_with_access`], with the inode a new entry takes when
+    /// the caller already has it ([`State::new_inos`]).
+    fn intern_mem_at(
+        &mut self,
+        parent: u64,
+        mut node: Node,
+        access: Access,
+        ino: Option<u64>,
+    ) -> u64 {
        if let Some(&ino) = self.by_uid.get(&node.uid) {
            let changed = self
                .entries
                .get(&ino)
                .is_some_and(|entry| entry.access != access);
+            self.keep_open_write_size(ino, &mut node);
            if let Some(e) = self.entries.get_mut(&ino) {
                e.node = node;
                e.parent = parent;
@@ -801,8 +965,13 @@ impl State {
            }
            return ino;
        }
-        let ino = self.next_ino;
-        self.next_ino += 1;
+        let ino = match ino {
+            Some(ino) => ino,
+            None => self
+                .new_inos(&[&node])
+                .remove(&node.uid)
+                .unwrap_or_default(),
+        };
        self.by_uid.insert(node.uid.clone(), ino);
        self.entries.insert(
            ino,
@@ -819,6 +988,41 @@ impl State {
        ino
    }

+    /// The inodes for nodes that have no entry yet, from their local ids, in
+    /// one transaction. Should the database fail, they come from
+    /// [`State::next_ino`] instead, so the mount keeps working, with inodes
+    /// that last only this run. So do the inodes of virtual folders, which are
+    /// never stored.
+    fn new_inos(&mut self, nodes: &[&Node]) -> HashMap<NodeUid, u64> {
+        let (virtual_nodes, stored): (Vec<&Node>, Vec<&Node>) = nodes
+            .iter()
+            .partition(|node| crate::r#virtual::is_virtual_uid(&node.uid));
+        let mut inos = match self.db.lids_for(&stored) {
+            Ok(lids) => stored
+                .iter()
+                .zip(lids)
+                .map(|(node, lid)| (node.uid.clone(), lid_ino(lid)))
+                .collect(),
+            Err(error) => {
+                warn!(%error, "no local ids for new inodes; numbering them for this run");
+                self.run_inos(&stored)
+            }
+        };
+        inos.extend(self.run_inos(&virtual_nodes));
+        inos
+    }
+
+    fn run_inos(&mut self, nodes: &[&Node]) -> HashMap<NodeUid, u64> {
+        nodes
+            .iter()
+            .map(|node| {
+                let ino = self.next_ino;
+                self.next_ino += 1;
+                (node.uid.clone(), ino)
+            })
+            .collect()
+    }
+
    /// Decrement lookup count for an inode and prune if lookup_count == 0 && open_count == 0 && unlinked.
    pub(crate) fn forget_lookup(&mut self, ino: u64, nlookup: u64) -> Option<(u64, String)> {
        if let Some(entry) = self.entries.get_mut(&ino) {
@@ -833,6 +1037,23 @@ impl State {

    /// Allocate (or reuse) a stable inode for a node that came *from* the
    /// database, which is why nothing is written back.
+    /// Carry the size and mtime of a file open for writing over onto `node`,
+    /// which is about to replace its entry.
+    ///
+    /// The open handle is ahead of anything Drive can report until release
+    /// queues it. Taking the remote's size shrank a SQLite database to its empty
+    /// create while SQLite held it open, and the kernel then capped every read
+    /// at that size (docs/BUGS.md B109).
+    pub(crate) fn keep_open_write_size(&self, ino: u64, node: &mut Node) {
+        let (Some(aw), Some(entry)) = (self.active_writes.get(&ino), self.entries.get(&ino)) else {
+            return;
+        };
+        if let NodeKind::File { claimed_size, .. } = &mut node.kind {
+            *claimed_size = Some(aw.len as i64);
+            node.modification_time = entry.node.modification_time;
+        }
+    }
+
    pub(crate) fn intern_from_db(&mut self, parent: u64, node: Node) -> u64 {
        self.intern_mem(parent, node)
    }
@@ -842,11 +1063,27 @@ impl State {
    ///
    /// This is what keeps `ls` on a large folder quick: one commit for the
    /// listing, rather than one autocommit — and one fsync — per child.
-    pub(crate) fn intern_batch(&mut self, parent: u64, nodes: Vec<Node>) -> Vec<u64> {
+    pub(crate) fn intern_batch(&mut self, parent: u64, mut nodes: Vec<Node>) -> Vec<u64> {
+        for node in &mut nodes {
+            self.keep_revision_mtime(node);
+        }
        self.outbox.push(DbWrite::Upsert(nodes.clone()));
+        let fresh: Vec<&Node> = nodes
+            .iter()
+            .filter(|node| !self.by_uid.contains_key(&node.uid))
+            .collect();
+        let mut inos = if fresh.is_empty() {
+            HashMap::new()
+        } else {
+            self.new_inos(&fresh)
+        };
        nodes
            .into_iter()
-            .map(|node| self.intern_mem(parent, node))
+            .map(|node| {
+                let access = self.access_for_node(parent, &node);
+                let ino = inos.remove(&node.uid);
+                self.intern_mem_at(parent, node, access, ino)
+            })
            .collect()
    }

@@ -1164,7 +1401,7 @@ mod tests {
        let dir = TempDir::new();
        let db = Db::open(&dir.0.join("cache.db")).unwrap();
        let share_access = db.all_share_access().unwrap();
-        let st = State::new(Arc::new(db), share_access, 1);
+        let st = State::new(Arc::new(db), share_access);
        (st, dir)
    }

@@ -1182,6 +1419,36 @@ mod tests {
        (st, dir, src, dst)
    }

+    /// A node's inode comes from its row's local id, so it is the same in
+    /// every mount, after the hot cache drops it, and after a restart.
+    #[test]
+    fn a_node_keeps_its_inode_across_mounts_evictions_and_restarts() {
+        let (mut st, _dir) = state();
+        let inos = st.intern_batch(
+            0,
+            vec![
+                node("a", "root", "a.txt", false),
+                node("b", "root", "b.txt", false),
+            ],
+        );
+        st.flush_outbox();
+        let db = st.db.clone();
+        assert_ne!(inos[0], inos[1]);
+        assert!(!inos.contains(&crate::ROOT_INO));
+
+        let mut other = State::new(db.clone(), HashMap::new());
+        assert_eq!(other.intern(0, node("b", "root", "b.txt", false)), inos[1]);
+
+        st.forget_mem(&uid("a"));
+        assert_eq!(st.intern(0, node("a", "root", "a.txt", false)), inos[0]);
+
+        let mut restarted = State::new(db, HashMap::new());
+        assert_eq!(
+            restarted.intern_batch(0, vec![node("a", "root", "a.txt", false)]),
+            [inos[0]]
+        );
+    }
+
    /// Audit A5. Moving a file out of a folder leaves that folder's DB row
    /// claiming a complete listing, so once the hot cache drops it, remote
    /// changes under it stop being seen. `relocate` has to clear both sides.
@@ -1247,7 +1514,7 @@ mod tests {
        let root = uid("root").to_string();
        let state = parking_lot::Mutex::new(st);
        {
-            let mut guard = lock_state(&state, &db);
+            let mut guard = StateGuard::new(state.lock(), &db);
            guard.intern(0, node("root", "none", "My Files", true));
            assert!(
                db.node_by_uid(&root).unwrap().is_none(),
@@ -1490,6 +1757,7 @@ mod tests {
            })
            .collect();
        st.next_ino = crate::ROOT_INO + nodes.len() as u64;
+        st.roots.insert(crate::ROOT_INO);
        // Reverse order so entries are inserted before their parents, matching
        // the hydration path's non-topological materialization.
        for (i, node) in nodes.iter().enumerate().rev() {
@@ -1863,4 +2131,137 @@ mod tests {
        let shared = st.intern(owned_root, shared);
        assert_eq!(st.entries[&shared].access, Access::Viewer);
    }
+
+    fn at_revision(mut node: Node, revision: &str, mtime: i64) -> Node {
+        node.modification_time = mtime;
+        if let NodeKind::File {
+            active_revision_id, ..
+        } = &mut node.kind
+        {
+            *active_revision_id = Some(revision.into());
+        }
+        node
+    }
+
+    #[test]
+    fn a_renamed_file_keeps_its_mtime_until_its_content_changes() {
+        let (mut st, _dir) = state();
+        let root = st.intern(0, node("root", "none", "My Files", true));
+        let mut file = node("file", "root", "a.txt", false);
+        if let NodeKind::File {
+            claimed_size,
+            total_size_on_storage,
+            ..
+        } = &mut file.kind
+        {
+            *claimed_size = Some(7);
+            *total_size_on_storage = 519;
+        }
+        let ino = st.intern(root, at_revision(file.clone(), "r1", 100));
+        // Drive stamps the link on a rename; the content is still r1.
+        let mut renamed = at_revision(file.clone(), "r1", 160);
+        renamed.name = "b.txt".into();
+        st.intern_batch(root, vec![renamed]);
+        assert_eq!(st.entries[&ino].node.modification_time, 100);
+        assert_eq!(st.entries[&ino].node.name, "b.txt");
+        // A listing that leaves the size out still describes revision r1.
+        let mut bare = at_revision(file.clone(), "r1", 170);
+        assert_eq!(crate::node_size(&st.entries[&ino].node), 7);
+        if let NodeKind::File { claimed_size, .. } = &mut bare.kind {
+            *claimed_size = None;
+        }
+        st.intern(root, bare);
+        assert_eq!(st.entries[&ino].node.modification_time, 100);
+        assert_eq!(crate::node_size(&st.entries[&ino].node), 7);
+        st.intern(root, at_revision(file, "r2", 200));
+        assert_eq!(st.entries[&ino].node.modification_time, 200);
+    }
+
+    fn handle(len: u64, base_size: u64) -> WriteHandle {
+        let path = std::env::temp_dir().join(format!("pdfs-handle-test-{}", std::process::id()));
+        let file = File::create(&path).unwrap();
+        let _ = std::fs::remove_file(&path);
+        WriteHandle {
+            ino: 2,
+            uid: uid("file"),
+            file: Arc::new(file),
+            path,
+            written: Intervals::default(),
+            len,
+            base_size,
+            base_mtime: 0,
+            base_revision_id: None,
+            dirty: false,
+            open_count: 1,
+        }
+    }
+
+    /// A file created offline is written while its queued create lands. The
+    /// placeholder had no revision, so the handle takes the empty file the
+    /// create made as its base (docs/BUGS.md B113).
+    #[test]
+    fn a_handle_on_a_placeholder_is_based_on_the_create_that_landed() {
+        let mut h = handle(0, 0);
+        assert_eq!(h.base_revision_id, None);
+        let mut landed = node("real", "root", "f.mkv", false);
+        landed.modification_time = 160;
+        if let NodeKind::File {
+            active_revision_id, ..
+        } = &mut landed.kind
+        {
+            *active_revision_id = Some("empty".into());
+        }
+        h.rebase_onto(&landed);
+        assert_eq!(h.base_mtime, 160);
+        assert_eq!(h.base_size, 0);
+        assert_eq!(h.base_revision_id.as_deref(), Some("empty"));
+    }
+
+    #[test]
+    fn a_listing_does_not_shrink_a_file_open_for_writing() {
+        let (mut st, _dir) = state();
+        let ino = st.intern(0, node("file", "root", "workload.db", false));
+        let mut h = handle(16384, 0);
+        h.ino = ino;
+        st.active_writes.insert(ino, h);
+        st.set_size(ino, 16384);
+        st.touch_mtime(ino, 500);
+
+        // The remote still holds the empty file the create sealed.
+        st.intern(0, node("file", "root", "workload.db", false));
+        assert_eq!(crate::node_size(&st.entries[&ino].node), 16384);
+        assert_eq!(st.entries[&ino].node.modification_time, 500);
+
+        // Once the handle is gone the remote is authoritative again.
+        st.active_writes.remove(&ino);
+        st.intern(0, node("file", "root", "workload.db", false));
+        assert_eq!(crate::node_size(&st.entries[&ino].node), 0);
+    }
+
+    #[test]
+    fn a_write_past_the_end_authors_the_hole_it_leaves() {
+        // Opened over a 100-byte base, shrunk to 10, then written at 50: bytes
+        // 10..50 are zeros now, not the base's bytes 10..50.
+        let mut h = handle(100, 100);
+        h.written.clip(10);
+        h.len = 10;
+        h.record_write(50, 60);
+        assert_eq!(h.len, 60);
+        assert_eq!(
+            h.written.segments(0, 60),
+            vec![(0, 10, false), (10, 60, true)],
+            "only the head still comes from the base"
+        );
+    }
+
+    #[test]
+    fn a_write_inside_the_file_leaves_the_rest_to_the_base() {
+        let mut h = handle(100, 100);
+        h.record_write(40, 50);
+        assert_eq!(h.len, 100);
+        assert_eq!(
+            h.written.segments(0, 100),
+            vec![(0, 40, false), (40, 50, true), (50, 100, false)]
+        );
+    }
 }
@@ -109,6 +109,7 @@ impl Core {
            by_parent_name.insert((parent, node.name.as_str()), node);
        }

+        let roots = self.search_roots();
        let online = self.online.load(std::sync::atomic::Ordering::Relaxed);
        for node in &nodes {
            if node.trashed || node.is_folder() {
@@ -132,7 +133,16 @@ impl Core {
                        self.remove_conflict_copy(node, &base);
                    }
                }
-                SweepAction::Flag(detail) => self.flag_conflict(&node.uid, &node.name, detail),
+                // Only flag what the conflict listing can show. Anything else
+                // would sit in the feed as "resolved" with no way to act on
+                // it (`docs/BUGS.md` B99).
+                SweepAction::Flag(detail) => {
+                    if self.conflict_path(&roots, &node.uid).is_some() {
+                        self.flag_conflict(&node.uid, &node.name, detail);
+                    } else {
+                        debug!(uid = %node.uid, name = %node.name, "conflict sweep: copy is outside every location; not flagged");
+                    }
+                }
            }
        }
    }
@@ -155,7 +165,7 @@ impl Core {
        }
        match self
            .rt
-            .block_on(self.client.trash_nodes(std::slice::from_ref(uid)))
+            .block_on(self.drive.trash_nodes(std::slice::from_ref(uid)))
            .and_then(batch::into_unit)
        {
            Ok(()) => {}
@@ -165,10 +175,9 @@ impl Core {
                return;
            }
        }
-        // Every mount, not just the primary: a conflict copy inside a sync
-        // folder lives in that fork's inode space, and leaving it hooked up
-        // there keeps a node we have just trashed remotely visible and
-        // readable there (`docs/BUGS.md` B74).
+        // Leaving a conflict copy hooked up in the tree keeps a node we have
+        // just trashed remotely visible and readable in whichever mount shows
+        // it (`docs/BUGS.md` B74).
        self.for_each_state(|st| {
            st.forget_or_unlink(uid);
        });
@@ -261,7 +270,7 @@ impl Core {
    /// is tracked in that fork's `State` — so consulting `self.state` alone
    /// answered "idle" for every such file and let the sweep delete one with a
    /// writer attached (`docs/BUGS.md` B74). Busy anywhere means busy.
-    fn is_busy(&self, uid: &NodeUid) -> bool {
+    pub(crate) fn is_busy(&self, uid: &NodeUid) -> bool {
        let mut busy = false;
        self.for_each_state(|st| {
            let Some(&ino) = st.by_uid.get(uid) else {
@@ -273,12 +282,21 @@ impl Core {
        busy
    }

-    /// Surface a conflict copy that needs the user's attention, at most once per
-    /// daemon run so the activity feed is not spammed each pass.
+    /// Surface a conflict copy that needs the user's attention, once. The
+    /// in-memory set spares the database each pass; the activity log itself is
+    /// what keeps a restart from logging the same copy again (`docs/BUGS.md`
+    /// B99). A copy's name carries its own timestamp, so the name identifies it.
    fn flag_conflict(&self, uid: &NodeUid, name: &str, detail: String) {
        if !self.conflict_notified.lock().insert(uid.clone()) {
            return;
        }
+        match self.db.activity_has(ActivityKind::Conflict, name) {
+            Ok(false) => {}
+            Ok(true) => return,
+            // Cannot tell: a repeat entry is harmless, a missing one hides a
+            // conflict.
+            Err(e) => warn!(%uid, name, error = ?e, "conflict sweep: activity check failed"),
+        }
        debug!(%uid, name, detail, "conflict sweep: flagged divergent conflict copy");
        self.log_activity(ActivityKind::Conflict, name, detail, false);
    }
@@ -73,6 +73,9 @@ enum Applied {
    Downloaded,
    /// A conflict copy was kept.
    Conflict,
+    /// The local file to upload was deleted after the scan planned it. There is
+    /// nothing left to send, and the next pass sees the deletion (B108).
+    Vanished,
 }

 impl Core {
@@ -82,6 +85,12 @@ impl Core {
    /// is guaranteed — a switch requested over the control socket cannot wait for a
    /// pass that may run for minutes.
    pub(crate) fn reconcile_folder(&self, folder: &StoredSyncFolder) {
+        // A paused folder skips the settle too: a queued switch to on-demand
+        // evicts the local tree, which is only safe after a pass uploaded it.
+        if self.sync_folder_paused(folder.id) {
+            debug!(id = folder.id, "sync: folder paused, skipping reconcile");
+            return;
+        }
        // `ondemand` folders are live FUSE mounts, not mirrored, so there is nothing
        // to reconcile — but one may still carry a queued switch back to `mirror`,
        // so the settle below is not skipped with it.
@@ -361,7 +370,7 @@ impl Core {
            HashMap::new()
        } else {
            self.rt
-                .block_on(self.client.enumerate_nodes_light(&check))
+                .block_on(self.drive.enumerate_nodes_light(&check))
                .map_err(|e| format!("resolve changed nodes: {e}"))?
                .into_iter()
                .filter(|n| !n.trashed)
@@ -516,7 +525,7 @@ impl Core {
            };
            if let Err(e) = self
                .rt
-                .block_on(self.client.trash_nodes(&[uid]))
+                .block_on(self.drive.trash_nodes(&[uid]))
                .and_then(batch::into_unit)
            {
                warn!(rel, error = %e, "sync: trash remote failed");
@@ -767,7 +776,7 @@ impl Core {
                    let remote = r.expect("remote deletion requires a remote file");
                    if let Err(e) = self
                        .rt
-                        .block_on(self.client.trash_nodes(std::slice::from_ref(&remote.uid)))
+                        .block_on(self.drive.trash_nodes(std::slice::from_ref(&remote.uid)))
                        .and_then(batch::into_unit)
                    {
                        warn!(rel, error = %e, "sync: trash remote failed");
@@ -830,7 +839,7 @@ impl Core {
        for (rel, uid) in delete_remote_dirs {
            if let Err(e) = self
                .rt
-                .block_on(self.client.trash_nodes(&[uid]))
+                .block_on(self.drive.trash_nodes(&[uid]))
                .and_then(batch::into_unit)
            {
                warn!(rel, error = %e, "sync: trash remote folder failed");
@@ -885,14 +894,14 @@ impl Core {
    ) -> Result<(), String> {
        let uids = self
            .rt
-            .block_on(self.client.enumerate_folder_children_node_uids(folder))
+            .block_on(self.drive.enumerate_folder_children_node_uids(folder))
            .map_err(|e| format!("enumerate {folder}: {e}"))?;
        if uids.is_empty() {
            return Ok(());
        }
        let nodes = self
            .rt
-            .block_on(self.client.enumerate_nodes_light(&uids))
+            .block_on(self.drive.enumerate_nodes_light(&uids))
            .map_err(|e| format!("resolve nodes: {e}"))?;
        for node in nodes {
            if node.trashed || !node.is_folder() {
@@ -937,14 +946,14 @@ impl Core {
        }
        let uids = self
            .rt
-            .block_on(self.client.enumerate_folder_children_node_uids(folder))
+            .block_on(self.drive.enumerate_folder_children_node_uids(folder))
            .map_err(|e| format!("enumerate {folder}: {e}"))?;
        if uids.is_empty() {
            return Ok(());
        }
        let nodes = self
            .rt
-            .block_on(self.client.enumerate_nodes_light(&uids))
+            .block_on(self.drive.enumerate_nodes_light(&uids))
            .map_err(|e| format!("resolve nodes: {e}"))?;

        // Files whose recorded mtime no longer matches: their size has to be
@@ -962,7 +971,7 @@ impl Core {
            HashMap::new()
        } else {
            self.rt
-                .block_on(self.client.enumerate_nodes(&stale))
+                .block_on(self.drive.enumerate_nodes(&stale))
                .map_err(|e| format!("resolve nodes: {e}"))?
                .iter()
                .map(|n| (n.uid.to_string(), remote_file_sig(n).1))
@@ -1130,7 +1139,7 @@ impl Core {
        match op {
            Pending::CreateDir { rel, parent } => {
                let uid = self
-                    .client
+                    .drive
                    .create_folder(parent, base_name(rel), Some(now_secs()))
                    .await
                    .map_err(|e| format!("create remote folder {rel}: {e}"))?;
@@ -1141,13 +1150,10 @@ impl Core {
                Ok(Applied::Dir(rel.clone(), uid))
            }
            Pending::UploadNew { rel, parent } => {
-                self.upload_new(folder_id, local_root, rel, parent).await?;
-                Ok(Applied::Uploaded)
+                self.upload_new(folder_id, local_root, rel, parent).await
            }
            Pending::UploadRevision { rel, uid } => {
-                self.upload_revision(folder_id, local_root, rel, uid)
-                    .await?;
-                Ok(Applied::Uploaded)
+                self.upload_revision(folder_id, local_root, rel, uid).await
            }
            Pending::Download {
                rel,
@@ -1211,15 +1217,20 @@ impl Core {
        local_root: &Path,
        rel: &str,
        parent: &NodeUid,
-    ) -> Result<(), String> {
+    ) -> Result<Applied, String> {
        let path = local_root.join(rel_to_path(rel));
        let name = base_name(rel);
-        let file = std::fs::File::open(&path).map_err(|e| format!("open {rel}: {e}"))?;
+        let Some(file) = open_to_upload(&path, rel)? else {
+            return Ok(Applied::Vanished);
+        };
        let meta = file.metadata().map_err(|e| format!("stat {rel}: {e}"))?;
        let mtime = system_mtime(&meta);
        // Taken from the descriptor being streamed, so it names the content that
        // actually goes up rather than whatever is at the path when we finish.
        let streamed = LocalSig::from(&meta);
+        let thumbnails = self
+            .upload_thumbnails_async(path.clone(), name.to_string())
+            .await;
        // Count the bytes as they are read, so this upload shows up in
        // `GetQueueStatus` next to a manual one. The uid isn't known until the
        // draft is sealed, so the transfer registers without one.
@@ -1229,7 +1240,7 @@ impl Core {
                .begin(name, "", TransferDirection::Upload, meta.len()),
        );
        let uid = self
-            .client
+            .drive
            // Mirror push: the local file is authoritative. If a prior attempt was
            // interrupted mid-upload it left an unsealed draft of this name; recover
            // it even across a daemon restart (which rotates our client uid), so the
@@ -1240,7 +1251,7 @@ impl Core {
                crate::media_type_for(name),
                reader,
                meta.len() as i64,
-                Vec::new(),
+                thumbnails,
                Some(mtime),
                false,
            )
@@ -1252,7 +1263,8 @@ impl Core {
        self.invalidate_children_of(parent);
        warn_if_torn(rel, &path, streamed);
        self.record_file_baseline(folder_id, rel, Some(streamed), &uid)
-            .await
+            .await?;
+        Ok(Applied::Uploaded)
    }

    /// Upload a changed local file as a new revision of an existing remote node.
@@ -1262,12 +1274,17 @@ impl Core {
        local_root: &Path,
        rel: &str,
        uid: &NodeUid,
-    ) -> Result<(), String> {
+    ) -> Result<Applied, String> {
        let path = local_root.join(rel_to_path(rel));
-        let file = std::fs::File::open(&path).map_err(|e| format!("open {rel}: {e}"))?;
+        let Some(file) = open_to_upload(&path, rel)? else {
+            return Ok(Applied::Vanished);
+        };
        let meta = file.metadata().map_err(|e| format!("stat {rel}: {e}"))?;
        let mtime = system_mtime(&meta);
        let streamed = LocalSig::from(&meta);
+        let thumbnails = self
+            .upload_thumbnails_async(path.clone(), base_name(rel).to_string())
+            .await;
        let reader = OwnedCountingReader::new(
            file,
            self.transfers.begin(
@@ -1277,13 +1294,14 @@ impl Core {
                meta.len(),
            ),
        );
-        self.client
-            .upload_new_revision_from(uid, reader, meta.len() as i64, Vec::new(), Some(mtime))
+        self.drive
+            .upload_new_revision_from(uid, reader, meta.len() as i64, thumbnails, Some(mtime))
            .await
            .map_err(|e| format!("upload revision {rel}: {e}"))?;
        warn_if_torn(rel, &path, streamed);
        self.record_file_baseline(folder_id, rel, Some(streamed), uid)
-            .await
+            .await?;
+        Ok(Applied::Uploaded)
    }

    /// Download a remote file to its local path (atomically via a temp file),
@@ -1316,7 +1334,21 @@ impl Core {
                .map(|d| d.as_nanos())
                .unwrap_or(0)
        ));
-        {
+        // A file an on-demand mount already read, say one just moved here from
+        // it, is in the content cache under the same revision key.
+        let seeded = size > 0 && self.cache.copy_cached_to(uid, mtime, size as u64, &tmp);
+        if seeded {
+            std::fs::File::open(&tmp)
+                .and_then(|f| f.sync_all())
+                .map_err(|e| {
+                    let _ = std::fs::remove_file(&tmp);
+                    format!("sync tmp {rel}: {e}")
+                })?;
+            debug!(
+                rel,
+                "sync: placed from the content cache instead of downloading"
+            );
+        } else {
            let out = std::fs::File::create(&tmp).map_err(|e| format!("create tmp {rel}: {e}"))?;
            // Count the bytes as they land, so the download reports progress like
            // an on-demand hydration does.
@@ -1327,7 +1359,7 @@ impl Core {
                size.max(0) as u64,
            );
            let mut out = CountingWriter::new(out, &guard);
-            self.client
+            self.drive
                .download_file_to(uid, &mut out)
                .await
                .map_err(|e| {
@@ -1392,7 +1424,7 @@ impl Core {
        let (lmtime, lsize) = (local.mtime, local.size);
        // Re-fetch the node so the stored remote signature is exactly what a walk
        // will report next time.
-        let (rmtime, rsize) = match self.client.enumerate_nodes(std::slice::from_ref(uid)).await {
+        let (rmtime, rsize) = match self.drive.enumerate_nodes(std::slice::from_ref(uid)).await {
            Ok(nodes) => nodes
                .first()
                .map(remote_file_sig)
@@ -1419,6 +1451,23 @@ impl Core {
    }
 }

+/// Open a local file for upload, or `None` when it is gone.
+///
+/// A scan plans uploads from a listing, and the file can be deleted before its
+/// upload starts — a build or a test tree cleaned up mid-pass. That is not a
+/// failure: the next pass sees the deletion. Counting it as one put the folder
+/// in `error` for a file nobody wanted any more (B108).
+fn open_to_upload(path: &Path, rel: &str) -> Result<Option<std::fs::File>, String> {
+    match std::fs::File::open(path) {
+        Ok(file) => Ok(Some(file)),
+        Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
+            debug!(rel, "sync: file deleted before its upload; skipping");
+            Ok(None)
+        }
+        Err(e) => Err(format!("open {rel}: {e}")),
+    }
+}
+
 /// Say so when a file changed under an upload that was streaming it.
 ///
 /// Purely diagnostic — the correction is already in place, because the baseline
@@ -1590,6 +1639,76 @@ fn walk_local_tree(
    Ok(())
 }

+/// Why the mirror copy at `rel` holds something Proton Drive does not, or
+/// `None` when everything under it is on Drive exactly as it is on disk.
+///
+/// A move out of a mirror folder removes the local copy once Drive has moved
+/// the node, so anything only this disk has would be lost with it: a file not
+/// uploaded yet, one edited since, a deletion not carried up yet, or anything
+/// the engine never uploads. That is why ignored names count here, and why the
+/// walk is its own rather than [`walk_local_tree`], which skips symlinks.
+pub(crate) fn mirror_subtree_unsynced(
+    root: &Path,
+    rel: &str,
+    baseline: &HashMap<String, StoredSyncEntry>,
+) -> Option<String> {
+    let mut seen = HashSet::new();
+    if let Some(reason) = unsynced_local(root, rel, baseline, &mut seen) {
+        return Some(reason);
+    }
+    let prefix = format!("{rel}/");
+    baseline
+        .keys()
+        .filter(|r| *r == rel || r.starts_with(&prefix))
+        .find(|r| !seen.contains(r.as_str()))
+        .map(|r| format!("{r} was deleted here but not on Proton Drive yet"))
+}
+
+fn unsynced_local(
+    root: &Path,
+    rel: &str,
+    baseline: &HashMap<String, StoredSyncEntry>,
+    seen: &mut HashSet<String>,
+) -> Option<String> {
+    let path = root.join(rel_to_path(rel));
+    let meta = match std::fs::symlink_metadata(&path) {
+        Ok(meta) => meta,
+        Err(e) => return Some(format!("cannot read {rel}: {e}")),
+    };
+    let Some(base) = baseline.get(rel) else {
+        return Some(format!("{rel} is not on Proton Drive yet"));
+    };
+    seen.insert(rel.to_string());
+    if meta.is_file() {
+        return (!LocalSig::from(&meta).same_content(&LocalSig::from(base)))
+            .then(|| format!("{rel} has changes that are not on Proton Drive yet"));
+    }
+    if !meta.is_dir() {
+        return Some(format!("{rel} is not a regular file or folder"));
+    }
+    let entries = match std::fs::read_dir(&path) {
+        Ok(entries) => entries,
+        Err(e) => return Some(format!("cannot read {rel}: {e}")),
+    };
+    for entry in entries {
+        let name = match entry {
+            Ok(entry) => entry.file_name(),
+            Err(e) => return Some(format!("cannot read {rel}: {e}")),
+        };
+        let Some(name) = name.to_str() else {
+            return Some(format!("{rel} holds a name that is not valid UTF-8"));
+        };
+        // A download the engine left half done; it is the engine's to clean up.
+        if name.contains(".pdfs-tmp-") {
+            continue;
+        }
+        if let Some(reason) = unsynced_local(root, &format!("{rel}/{name}"), baseline, seen) {
+            return Some(reason);
+        }
+    }
+    None
+}
+
 /// Publish a conflict copy without overwriting an earlier conflict bearing the
 /// same timestamp. The original is removed only after the new copy is durable.
 fn preserve_conflict_copy(path: &Path, stamp: i64) -> std::io::Result<PathBuf> {
@@ -2143,6 +2262,27 @@ mod tests {
        assert_eq!(remote_sig(&e), None);
    }

+    #[test]
+    fn a_file_deleted_before_its_upload_is_skipped_not_failed() {
+        let root = std::env::temp_dir().join(format!("pdfs-b108-{}", std::process::id()));
+        std::fs::create_dir_all(&root).unwrap();
+        let gone = root.join("gone.txt");
+        assert!(open_to_upload(&gone, "gone.txt").unwrap().is_none());
+
+        std::fs::write(&gone, b"x").unwrap();
+        assert!(open_to_upload(&gone, "gone.txt").unwrap().is_some());
+
+        // Other open failures still count as errors.
+        let err = open_to_upload(&gone.join("child"), "gone.txt/child");
+        assert!(err.unwrap_err().starts_with("open gone.txt/child:"));
+        let _ = std::fs::remove_dir_all(&root);
+
+        let mut o = Outcome::default();
+        o.record(&Applied::Vanished);
+        assert!(o.is_empty());
+        assert_eq!(o.errors, 0);
+    }
+
    #[test]
    fn outcome_summarises_only_what_it_moved() {
        let mut o = Outcome::default();
@@ -2334,6 +2474,94 @@ mod tests {
        );
    }

+    /// A baseline row recording `path` as it is on disk right now.
+    fn synced_row(root: &Path, rel: &str) -> (String, StoredSyncEntry) {
+        let meta = std::fs::symlink_metadata(root.join(rel_to_path(rel))).unwrap();
+        let sig = LocalSig::from(&meta);
+        let entry = StoredSyncEntry {
+            rel_path: rel.to_string(),
+            remote_uid: Some(format!("vol~{rel}")),
+            local_mtime: sig.mtime,
+            local_mtime_ns: sig.mtime_ns,
+            local_size: sig.size,
+            remote_rev: None,
+            remote_hash: None,
+        };
+        (rel.to_string(), entry)
+    }
+
+    fn synced_subtree(name: &str) -> (PathBuf, HashMap<String, StoredSyncEntry>) {
+        let root = sync_test_dir(name);
+        std::fs::create_dir_all(root.join("dir/sub")).unwrap();
+        std::fs::write(root.join("dir/a.txt"), b"a").unwrap();
+        std::fs::write(root.join("dir/sub/b.txt"), b"b").unwrap();
+        let baseline = ["dir", "dir/sub", "dir/a.txt", "dir/sub/b.txt"]
+            .into_iter()
+            .map(|rel| synced_row(&root, rel))
+            .collect();
+        (root, baseline)
+    }
+
+    #[test]
+    fn a_fully_synced_mirror_subtree_may_leave() {
+        let (root, baseline) = synced_subtree("move-synced");
+        let reason = mirror_subtree_unsynced(&root, "dir", &baseline);
+        std::fs::remove_dir_all(&root).unwrap();
+        assert_eq!(reason, None);
+    }
+
+    #[test]
+    fn a_mirror_subtree_with_a_file_not_uploaded_may_not_leave() {
+        let (root, baseline) = synced_subtree("move-new-file");
+        std::fs::write(root.join("dir/sub/new.txt"), b"n").unwrap();
+        let reason = mirror_subtree_unsynced(&root, "dir", &baseline);
+        std::fs::remove_dir_all(&root).unwrap();
+        assert!(reason.unwrap().contains("dir/sub/new.txt"));
+    }
+
+    #[test]
+    fn a_mirror_subtree_with_an_edit_not_uploaded_may_not_leave() {
+        let (root, baseline) = synced_subtree("move-edit");
+        std::fs::write(root.join("dir/a.txt"), b"longer now").unwrap();
+        let reason = mirror_subtree_unsynced(&root, "dir", &baseline);
+        std::fs::remove_dir_all(&root).unwrap();
+        assert!(reason.unwrap().contains("dir/a.txt"));
+    }
+
+    #[test]
+    fn a_mirror_subtree_with_a_deletion_not_carried_up_may_not_leave() {
+        let (root, baseline) = synced_subtree("move-deleted");
+        std::fs::remove_file(root.join("dir/sub/b.txt")).unwrap();
+        let reason = mirror_subtree_unsynced(&root, "dir", &baseline);
+        std::fs::remove_dir_all(&root).unwrap();
+        assert!(reason.unwrap().contains("dir/sub/b.txt"));
+    }
+
+    #[test]
+    fn a_mirror_subtree_holding_a_symlink_may_not_leave() {
+        let (root, baseline) = synced_subtree("move-symlink");
+        std::os::unix::fs::symlink("a.txt", root.join("dir/link")).unwrap();
+        let reason = mirror_subtree_unsynced(&root, "dir", &baseline);
+        std::fs::remove_dir_all(&root).unwrap();
+        assert!(reason.unwrap().contains("dir/link"));
+    }
+
+    #[test]
+    fn a_name_prefixed_sibling_does_not_hold_a_mirror_subtree_back() {
+        let (root, mut baseline) = synced_subtree("move-sibling");
+        // Deleted here but not on Drive, yet outside the subtree being moved.
+        baseline.insert(
+            "dirt".to_string(),
+            StoredSyncEntry {
+                rel_path: "dirt".to_string(),
+                ..baseline["dir/a.txt"].clone()
+            },
+        );
+        let reason = mirror_subtree_unsynced(&root, "dir", &baseline);
+        std::fs::remove_dir_all(&root).unwrap();
+        assert_eq!(reason, None);
+    }
+
    /// The same rule one level up: if the sync root itself cannot be read, the
    /// pass sees nothing, and "nothing" must never mean "delete everything".
    #[test]
@@ -115,6 +115,9 @@ fn engine_loop(core: Core, rx: Receiver<SyncMsg>) {
            reconcile_all(&core);
        } else {
            for id in ids {
+                if core.sync_paused() {
+                    break;
+                }
                if let Ok(Some(folder)) = core.db.sync_folder_get(id) {
                    core.reconcile_folder(&folder);
                }
@@ -151,6 +154,9 @@ fn poll_only_loop(core: &Core, rx: Receiver<SyncMsg>) {
            reconcile_all(core);
        } else {
            for id in ids {
+                if core.sync_paused() {
+                    break;
+                }
                if let Ok(Some(folder)) = core.db.sync_folder_get(id) {
                    core.reconcile_folder(&folder);
                }
@@ -230,8 +236,14 @@ pub(super) fn classify(
    true
 }

-/// Reconcile every mirror folder in turn.
+/// Reconcile every mirror folder in turn. Skipped while sync is paused: the
+/// resume sends a fresh [`SyncMsg::ReconcileAll`], which walks everything the
+/// watcher reported meanwhile.
 fn reconcile_all(core: &Core) {
+    if core.sync_paused() {
+        debug!("sync: paused, skipping reconcile");
+        return;
+    }
    let folders = match core.db.sync_folder_list() {
        Ok(f) => f,
        Err(e) => {
@@ -108,6 +108,7 @@ impl Outcome {
            Applied::Uploaded => self.uploaded += 1,
            Applied::Downloaded => self.downloaded += 1,
            Applied::Conflict => self.conflicts += 1,
+            Applied::Vanished => {}
        }
    }

@@ -357,9 +357,9 @@ impl Core {
            }
        }

-        // Favourites are a separate call: the upload seal takes classification
+        // Favorites are a separate call: the upload seal takes classification
        // tags, but `Favorite` is not one of them — it goes through the photos
-        // volume's dedicated favourite endpoint.
+        // volume's dedicated favorite endpoint.
        if !favorites.is_empty() {
            let updates: Vec<PhotoTagsUpdate> = favorites
                .into_iter()
@@ -370,7 +370,7 @@ impl Core {
                })
                .collect();
            if let Err(e) = self.rt.block_on(photos.update_photos(&updates)) {
-                warn!(error = %e, "marking imported favourites failed");
+                warn!(error = %e, "marking imported favorites failed");
            }
        }
        Ok(())
@@ -13,6 +13,10 @@
 //! always reflects exactly what is in flight — even if the work fails partway
 //! and unwinds.
 //!
+//! The same per-block tick enforces the user's bandwidth limits: every byte a
+//! transfer moves is charged to its direction's [`RateLimit`], and the thread
+//! moving it sleeps off whatever the charge puts it over the cap.
+//!
 //! [`Request::GetQueueStatus`]: pdfs_core::control::Request::GetQueueStatus

 use parking_lot::Mutex;
@@ -20,7 +24,7 @@ use std::collections::HashMap;
 use std::io::{Read, Write};
 use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
-use std::time::Instant;
+use std::time::{Duration, Instant};

 use pdfs_core::control::{JobItem, TransferDirection, TransferItem};

@@ -52,6 +56,59 @@ pub struct TransferRegistry {
    inner: Mutex<HashMap<u64, Arc<Entry>>>,
    jobs: Mutex<HashMap<u64, Arc<JobEntry>>>,
    next: AtomicU64,
+    upload_limit: RateLimit,
+    download_limit: RateLimit,
+}
+
+/// How far ahead of its cap a direction may run before it is made to wait, so a
+/// small file still goes out at full speed.
+const RATE_BURST: Duration = Duration::from_secs(1);
+
+/// A bytes-per-second cap shared by every transfer in one direction; `0` is no
+/// cap.
+///
+/// A virtual clock rather than a refilled bucket: each charge pushes
+/// `next_free` forward by the time its bytes take at the cap, so concurrent
+/// transfers split the cap between them instead of each getting all of it.
+#[derive(Default)]
+struct RateLimit {
+    rate: AtomicU64,
+    next_free: Mutex<Option<Instant>>,
+}
+
+impl RateLimit {
+    fn set(&self, rate: u64) {
+        self.rate.store(rate, Ordering::Relaxed);
+        // A new cap starts from now, not from the debt the old one ran up.
+        *self.next_free.lock() = None;
+    }
+
+    /// Charge `n` bytes moved at `now`, returning how long the mover must wait
+    /// to stay under the cap.
+    fn charge(&self, n: u64, now: Instant) -> Duration {
+        let rate = self.rate.load(Ordering::Relaxed);
+        if rate == 0 || n == 0 {
+            return Duration::ZERO;
+        }
+        let mut next_free = self.next_free.lock();
+        let start = next_free.filter(|t| *t > now).unwrap_or(now);
+        let done = start + Duration::from_secs_f64(n as f64 / rate as f64);
+        *next_free = Some(done);
+        done.saturating_duration_since(now + RATE_BURST)
+    }
+}
+
+/// Sleep off a rate-limit wait. The bulk uploader reads on tokio workers, so
+/// the sleep is announced to the runtime there rather than silently holding a
+/// worker other tasks — FUSE reads among them — may need.
+fn throttle(wait: Duration) {
+    use tokio::runtime::{Handle, RuntimeFlavor};
+    match Handle::try_current() {
+        Ok(handle) if handle.runtime_flavor() == RuntimeFlavor::MultiThread => {
+            tokio::task::block_in_place(|| std::thread::sleep(wait))
+        }
+        _ => std::thread::sleep(wait),
+    }
 }

 impl TransferRegistry {
@@ -59,6 +116,20 @@ impl TransferRegistry {
        Arc::new(Self::default())
    }

+    /// Cap uploads and downloads at these bytes per second; `0` lifts a cap.
+    /// Applies to transfers already running from their next block.
+    pub fn set_limits(&self, upload: u64, download: u64) {
+        self.upload_limit.set(upload);
+        self.download_limit.set(download);
+    }
+
+    fn limit(&self, direction: TransferDirection) -> &RateLimit {
+        match direction {
+            TransferDirection::Upload => &self.upload_limit,
+            TransferDirection::Download => &self.download_limit,
+        }
+    }
+
    /// Register a new transfer of `total` bytes (`0` = unknown), returning a
    /// guard that tracks progress and deregisters the transfer when dropped.
    pub fn begin(
@@ -169,9 +240,17 @@ pub struct TransferGuard {
 }

 impl TransferGuard {
-    /// Record `n` more bytes moved.
+    /// Record `n` more bytes moved, then wait if they put the direction over
+    /// its cap.
    pub fn add(&self, n: u64) {
        self.entry.done.fetch_add(n, Ordering::Relaxed);
+        let wait = self
+            .reg
+            .limit(self.entry.direction)
+            .charge(n, Instant::now());
+        if !wait.is_zero() {
+            throttle(wait);
+        }
    }
 }

@@ -310,14 +389,61 @@ impl<R: Read> Read for CountingReader<'_, R> {
            && cancel.load(Ordering::Relaxed)
        {
            // Not `Ok(0)`: a short read is how this reader says "end of file",
-            // and the SDK would seal a truncated revision from it.
-            return Err(std::io::Error::new(
-                std::io::ErrorKind::Interrupted,
-                "upload superseded by a newer write",
-            ));
+            // and the SDK would seal a truncated revision from it. Not
+            // `Interrupted` either: every reader loop, the SDK's included,
+            // retries that kind, and this flag never clears, so the drain
+            // thread spun forever with the transfer stuck at 0 bytes (B98).
+            return Err(std::io::Error::other("upload superseded by a newer write"));
        }
        let n = self.inner.read(buf)?;
        self.guard.add(n as u64);
        Ok(n)
    }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn an_uncapped_direction_never_waits() {
+        let limit = RateLimit::default();
+        assert_eq!(limit.charge(u64::MAX / 2, Instant::now()), Duration::ZERO);
+    }
+
+    #[test]
+    fn a_capped_direction_waits_once_past_its_burst() {
+        let limit = RateLimit::default();
+        limit.set(1000);
+        let now = Instant::now();
+        // One second of bytes is the burst: no wait yet.
+        assert_eq!(limit.charge(1000, now), Duration::ZERO);
+        // Two more seconds' worth at the same instant: wait out all but the burst.
+        assert_eq!(limit.charge(2000, now), Duration::from_secs(2));
+        // Lifting the cap drops the debt with it.
+        limit.set(0);
+        assert_eq!(limit.charge(5000, now), Duration::ZERO);
+    }
+
+    #[test]
+    fn concurrent_transfers_share_one_cap() {
+        let limit = RateLimit::default();
+        limit.set(1000);
+        let now = Instant::now();
+        assert_eq!(limit.charge(1500, now), Duration::from_millis(500));
+        assert_eq!(limit.charge(1500, now), Duration::from_secs(2));
+    }
+
+    #[test]
+    fn a_cancelled_upload_fails_its_read_instead_of_asking_for_a_retry() {
+        let reg = TransferRegistry::new();
+        let guard = reg.begin("f", "", TransferDirection::Upload, 4);
+        let cancel = Arc::new(AtomicBool::new(true));
+        let mut reader = CountingReader::new(&b"data"[..], &guard).with_cancel(cancel);
+        // `read_exact` retries `Interrupted` the way the SDK's block loop does,
+        // so this hangs rather than fails if the cancel asks for a retry.
+        let err = reader.read_exact(&mut [0; 4]).unwrap_err();
+        assert_ne!(err.kind(), std::io::ErrorKind::Interrupted);
+        assert_eq!(guard.entry.done.load(Ordering::Relaxed), 0);
+    }
+}
@@ -69,15 +69,18 @@ async fn run_uploads(
                    format!("destination access denied: errno {}", error.code()),
                ));
            }
+            let thumbnails = core
+                .upload_thumbnails_async(t.path.clone(), t.name.clone())
+                .await;
            match core
-                .client
+                .drive
                .upload_file_from(
                    &t.parent_uid,
                    &t.name,
                    media_type_for(&t.name),
                    reader,
                    t.size as i64,
-                    Vec::new(),
+                    thumbnails,
                    mtime,
                    false,
                )
@@ -235,14 +238,11 @@ impl Core {
            .map_err(|error| self.errno_error(error, "upload destination"))?;
        let new_uid = self
            .rt
-            .block_on(
-                self.client
-                    .create_folder(parent_uid, name, Some(now_secs())),
-            )
+            .block_on(self.drive.create_folder(parent_uid, name, Some(now_secs())))
            .map_err(|e| CoreError::from_api(&e, &format!("create folder {name}")))?;
        let node = self
-            .fetch_node(&new_uid)
-            .map_err(|e| self.errno_error(e, "fetch node"))?;
+            .fetch_minted_node(&new_uid, name)
+            .ok_or_else(|| minted_but_unlisted(name))?;
        let mut st = self.state();
        let ino = st.intern(pino, node);
        if let Some(kids) = st.children.get_mut(&pino)
@@ -35,3 +35,9 @@ adw = { package = "libadwaita", version = "0.9", features = ["v1_5"] }
 async-channel = "2"
 exif = { version = "0.6", package = "kamadak-exif" }
 webkit6 = "0.6"
+# Town and street names on the Places map, with font fallback for every script.
+pangocairo = "0.22"
+# Map tiles for the opt-in online map. The same build proton-sdk already pulls in.
+reqwest = { version = "0.13", default-features = false, features = ["rustls", "webpki-roots"] }
+# The system libintl (glibc) rather than a bundled gettext build.
+gettext-rs = { version = "0.7", features = ["gettext-system"] }
@@ -9,6 +9,8 @@ fn main() {
            &format!("{}/pdfs.gresource", out_dir),
            "--sourcedir",
            "resources/icons",
+            "--sourcedir",
+            "resources",
            "resources/pdfs.gresource.xml",
        ])
        .status()
@@ -22,10 +24,9 @@ fn main() {
    }

    println!("cargo:rerun-if-changed=resources/pdfs.gresource.xml");
-    println!(
-        "cargo:rerun-if-changed=resources/icons/scalable/actions/pdfs-build-thumbnails-symbolic.svg"
-    );
-    println!(
-        "cargo:rerun-if-changed=resources/icons/scalable/actions/pdfs-folder-upload-symbolic.svg"
-    );
+    println!("cargo:rerun-if-changed=resources/icons");
+    println!("cargo:rerun-if-changed=resources/style.css");
+    println!("cargo:rerun-if-changed=resources/proton-theme.css");
+    println!("cargo:rerun-if-changed=resources/prompt.css");
+    println!("cargo:rerun-if-changed=../../packaging/io.narl.proton-drive-linux.svg");
 }
@@ -0,0 +1,393 @@
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@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- A share link: two open chain ends and the bar that joins them, laid
+       on the diagonal. Written out in plain coordinates: GTK's symbolic icon
+       renderer drops a transformed group. -->
+  <path fill="#222222" d="M 4.82,6.23 L 3.05,8 A 3.5,3.5 0 0 0 8,12.95 L 9.77,11.18 L 8.53,9.94 L 6.76,11.71 A 1.75,1.75 0 0 1 4.29,9.24 L 6.06,7.47 Z"/>
+  <path fill="#222222" d="M 6.23,4.82 L 8,3.05 A 3.5,3.5 0 0 1 12.95,8 L 11.18,9.77 L 9.94,8.53 L 11.71,6.76 A 1.75,1.75 0 0 0 9.24,4.29 L 7.47,6.06 Z"/>
+  <path fill="#222222" d="M 5.26,9.5 L 9.5,5.26 L 10.74,6.5 L 6.5,10.74 Z"/>
+</svg>
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Show on map: a folded map in three panels. No stock theme has a
+       map-symbolic. -->
+  <path fill="#222222" d="M 1,3.2 L 5,1.5 V 12.8 L 1,14.5 Z M 11,3.2 L 15,1.5 V 12.8 L 11,14.5 Z"/>
+  <path fill="#222222" opacity="0.55" d="M 6,1.5 L 10,3.2 V 14.5 L 6,12.8 Z"/>
+</svg>
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Main menu: three bars. Bundled because themes such as Papirus draw
+       open-menu-symbolic as three dots, the same as every row's "more" menu. -->
+  <path fill="#222222" d="M 2,2.5 H 14 A 1,1 0 0 1 14,4.5 H 2 A 1,1 0 0 1 2,2.5 Z M 2,7 H 14 A 1,1 0 0 1 14,9 H 2 A 1,1 0 0 1 2,7 Z M 2,11.5 H 14 A 1,1 0 0 1 14,13.5 H 2 A 1,1 0 0 1 2,11.5 Z"/>
+</svg>
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- "Available offline": a filled disc with a down arrow knocked out of it
+       (one path, fill-rule evenodd, so symbolic recolouring keeps working).
+       Replaces the star, which every desktop uses for "favourite". -->
+  <path fill="#222222" fill-rule="evenodd" d="M 8,1 A 7,7 0 1 0 8,15 A 7,7 0 1 0 8,1 Z M 7,4 H 9 V 8.6 L 10.8,6.8 L 12.2,8.2 L 8,12.4 L 3.8,8.2 L 5.2,6.8 L 7,8.6 Z"/>
+</svg>
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- "Online only": a cloud outline. Lighter than the stock weather icon, so a
+       folder full of cloud-only files does not shout. -->
+  <path fill="#222222" fill-rule="evenodd" d="M 8.5,3 C 6.6,3 5,4.3 4.6,6.1 C 2.6,6.3 1,8 1,10 C 1,12.2 2.8,14 5,14 H 12 C 13.7,14 15,12.7 15,11 C 15,9.5 13.9,8.2 12.4,8 C 12.1,5.2 10.5,3 8.5,3 Z M 8.5,4.5 C 9.9,4.5 11,5.9 11,8 V 9.4 H 12 C 12.8,9.4 13.5,10.1 13.5,11 C 13.5,11.8 12.8,12.5 12,12.5 H 5 C 3.6,12.5 2.5,11.4 2.5,10 C 2.5,8.6 3.6,7.5 5,7.5 H 5.9 L 6,6.7 C 6.2,5.4 7.2,4.5 8.5,4.5 Z"/>
+</svg>
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Shared with me: two people. system-users-symbolic survives only in
+       Adwaita's legacy folder. -->
+  <path fill="#222222" d="M 6,2.5 A 2.5,2.5 0 1 0 6,7.5 A 2.5,2.5 0 1 0 6,2.5 Z M 1.5,14.5 C 1.5,11 3.5,9 6,9 C 8.5,9 10.5,11 10.5,14.5 Z"/>
+  <path fill="#222222" d="M 11,2.4 A 2.1,2.1 0 1 0 11,6.6 A 2.1,2.1 0 1 0 11,2.4 Z M 9.8,8.4 C 10.2,8.3 10.6,8.25 11,8.25 C 13.3,8.25 15,10 15,13.5 H 11.8 C 11.7,11.5 11,9.7 9.8,8.4 Z"/>
+</svg>
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Shared by me: one node passing to two others. Adwaita 50 no longer
+       ships emblem-shared-symbolic. -->
+  <path fill="#222222" d="M 12,1.25 A 2.25,2.25 0 1 0 12,5.75 A 2.25,2.25 0 1 0 12,1.25 Z M 4,5.75 A 2.25,2.25 0 1 0 4,10.25 A 2.25,2.25 0 1 0 4,5.75 Z"/>
+  <path fill="#222222" d="M 4.37,8.65 L 12.37,4.15 L 11.63,2.85 L 3.63,7.35 Z"/>
+  <path fill="#222222" d="M 12,10.25 A 2.25,2.25 0 1 0 12,14.75 A 2.25,2.25 0 1 0 12,10.25 Z"/>
+  <path fill="#222222" d="M 3.63,8.65 L 11.63,13.15 L 12.37,11.85 L 4.37,7.35 Z"/>
+</svg>
@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Syncing: two arrows chasing each other round a circle. Bundled because
+       Adwaita 50 no longer ships emblem-synchronizing-symbolic. The lower arrow
+       is the upper one turned half a circle, written out in plain coordinates:
+       GTK's symbolic icon renderer drops a transformed group. -->
+  <path fill="#222222" d="M 2,8 A 6,6 0 0 1 12.91,4.56 L 11.48,5.56 A 4.25,4.25 0 0 0 3.75,8 Z"/>
+  <path fill="#222222" d="M 14.23,3.64 L 14.03,7.68 L 10.17,6.48 Z"/>
+  <path fill="#222222" d="M 14,8 A 6,6 0 0 1 3.09,11.44 L 4.52,10.44 A 4.25,4.25 0 0 0 12.25,8 Z"/>
+  <path fill="#222222" d="M 1.77,12.36 L 1.97,8.32 L 5.83,9.52 Z"/>
+</svg>
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Up to date: a check knocked out of a filled circle. -->
+  <path fill="#222222" fill-rule="evenodd" d="M 8,1 A 7,7 0 1 0 8,15 A 7,7 0 1 0 8,1 Z M 4.1,8.6 L 5.2,7.5 L 7,9.3 L 10.8,5.4 L 11.9,6.5 L 7,11.5 Z"/>
+</svg>
@@ -0,0 +1,9 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Sharing stopped: the share glyph with its last node crossed out. Not
+       a no-entry sign, which reads as an error. -->
+  <path fill="#222222" d="M 12,1.25 A 2.25,2.25 0 1 0 12,5.75 A 2.25,2.25 0 1 0 12,1.25 Z M 4,5.75 A 2.25,2.25 0 1 0 4,10.25 A 2.25,2.25 0 1 0 4,5.75 Z"/>
+  <path fill="#222222" d="M 4.37,8.65 L 12.37,4.15 L 11.63,2.85 L 3.63,7.35 Z"/>
+  <path fill="#222222" d="M 3.63,8.65 L 8.23,11.25 L 8.97,9.95 L 4.37,7.35 Z"/>
+  <path fill="#222222" d="M 9.28,11.02 L 13.48,15.22 L 14.72,13.98 L 10.52,9.78 Z"/>
+  <path fill="#222222" d="M 13.48,9.78 L 9.28,13.98 L 10.52,15.22 L 14.72,11.02 Z"/>
+</svg>
@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <!-- Upload-files action: an up arrow over a tray, the pair to
+       pdfs-folder-upload-symbolic. Stock themes only offer `document-send`,
+       which reads as "send by mail". -->
+  <path fill="#222222" d="M 8,1 L 3.5,5.5 L 4.9,6.9 L 7,4.8 V 11 H 9 V 4.8 L 11.1,6.9 L 12.5,5.5 Z"/>
+  <path fill="#222222" d="M 1,10 V 14 C 1,14.6 1.4,15 2,15 H 14 C 14.6,15 15,14.6 15,14 V 10 H 13 V 13 H 3 V 10 Z"/>
+</svg>
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48">
+  <path fill="#6d4aff" d="M4 12a4 4 0 0 1 4-4h11.2a4 4 0 0 1 2.9 1.2L25 12h15a4 4 0 0 1 4 4v22a4 4 0 0 1-4 4H8a4 4 0 0 1-4-4z"/>
+  <path fill="#8a6eff" d="M4 19a3 3 0 0 1 3-3h34a3 3 0 0 1 3 3v19a4 4 0 0 1-4 4H8a4 4 0 0 1-4-4z"/>
+  <path fill="#ffffff" fill-opacity="0.18" d="M7 16h34a3 3 0 0 1 3 3v1a3 3 0 0 0-3-3H7a3 3 0 0 0-3 3v-1a3 3 0 0 1 3-3z"/>
+</svg>
@@ -6,5 +6,34 @@
  <gresource prefix="/de/nils/protondrivelinux/icons">
    <file preprocess="xml-stripblanks">scalable/actions/pdfs-build-thumbnails-symbolic.svg</file>
    <file preprocess="xml-stripblanks">scalable/actions/pdfs-folder-upload-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-upload-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-filter-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-offline-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-online-only-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-cached-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-details-pane-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-link-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-map-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-menu-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-people-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-share-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-sync-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-synced-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">scalable/actions/pdfs-unshare-symbolic.svg</file>
+    <!-- The Proton theme's folder: a full-colour icon from the icon theme
+         can't be recoloured by CSS. -->
+    <file preprocess="xml-stripblanks">scalable/places/pdfs-proton-folder.svg</file>
+    <!-- The app icon, from the one file packaging installs, so the in-app brand
+         matches the launcher and resolves even when nothing is installed. -->
+    <file alias="scalable/apps/io.narl.proton-drive-linux.svg" preprocess="xml-stripblanks">../../../packaging/io.narl.proton-drive-linux.svg</file>
+  </gresource>
+  <!-- The app stylesheet, loaded once at startup. Colours come from the
+       libadwaita palette so the app follows the system accent, light/dark and
+       high contrast. The Proton theme is a separate, opt-in provider. -->
+  <gresource prefix="/de/nils/protondrivelinux">
+    <file>style.css</file>
+    <file>proton-theme.css</file>
+    <!-- The search launcher's own sheet, over the same palette. -->
+    <file>prompt.css</file>
  </gresource>
 </gresources>
@@ -0,0 +1,224 @@
+/* The search launcher (pdfs-prompt). Colours come from the libadwaita
+   palette, so the launcher follows the system accent, light/dark and high
+   contrast like the app; the opt-in Proton theme recolours both alike. */
+
+window.launcher-window {
+  background: transparent;
+}
+
+.launcher-card {
+  background-color: var(--view-bg-color);
+  color: var(--view-fg-color);
+  border: 1px solid var(--border-color);
+  border-radius: 14px;
+  box-shadow: 0 16px 48px rgb(0 0 0 / 35%);
+}
+
+.search-bar {
+  padding: 14px 18px;
+  border-bottom: 1px solid var(--border-color);
+}
+
+.search-icon {
+  -gtk-icon-size: 20px;
+  color: color-mix(in srgb, currentColor 55%, transparent);
+}
+
+.search-entry {
+  background: none;
+  border: none;
+  box-shadow: none;
+  outline: none;
+  padding: 2px 0;
+  font-size: 1.15rem;
+}
+
+.key-hint {
+  padding: 2px 8px;
+  border-radius: 6px;
+  background-color: color-mix(in srgb, currentColor 8%, transparent);
+  font-size: 0.75rem;
+  opacity: 0.55;
+}
+
+.chip-row {
+  padding: 10px 14px;
+  border-bottom: 1px solid var(--border-color);
+}
+
+.chip {
+  padding: 4px 14px;
+  min-height: 0;
+  border-radius: 999px;
+  background: none;
+  border: 1px solid var(--border-color);
+  box-shadow: none;
+  font-size: 0.86rem;
+  font-weight: 500;
+}
+
+.chip:hover {
+  background-color: color-mix(in srgb, currentColor 6%, transparent);
+}
+
+.chip:checked {
+  background-color: var(--accent-bg-color);
+  color: var(--accent-fg-color);
+  border-color: var(--accent-bg-color);
+}
+
+/* --- results ------------------------------------------------------------ */
+
+.results {
+  padding: 2px 8px 10px 8px;
+}
+
+.section-header {
+  padding: 12px 10px 6px 10px;
+}
+
+.section-title {
+  font-size: 0.78rem;
+  font-weight: 700;
+  letter-spacing: 0.06em;
+  text-transform: uppercase;
+  opacity: 0.55;
+}
+
+.section-icon {
+  -gtk-icon-size: 14px;
+  opacity: 0.55;
+}
+
+.result-list {
+  background: none;
+}
+
+.result-row {
+  padding: 6px 10px;
+  border-radius: 10px;
+}
+
+.result-row:hover {
+  background-color: color-mix(in srgb, currentColor 5%, transparent);
+}
+
+/* A soft tint rather than a solid accent bar: the text keeps its colour, so
+   the highlighted match stays readable on the selected row. */
+.result-row:selected,
+.result-row:selected:hover {
+  background-color: color-mix(in srgb, var(--accent-bg-color) 18%, transparent);
+  color: inherit;
+}
+
+.result-name {
+  font-weight: 500;
+}
+
+.result-location,
+.result-meta {
+  font-size: 0.8rem;
+  opacity: 0.55;
+}
+
+.result-row:selected .result-location,
+.result-row:selected .result-meta {
+  opacity: 0.7;
+}
+
+.thumb {
+  border-radius: 6px;
+}
+
+.result-badge,
+.preview-badge {
+  -gtk-icon-size: 14px;
+}
+
+.badge-pinned {
+  color: var(--success-color);
+}
+
+.badge-cached {
+  color: var(--accent-color);
+}
+
+.badge-cloud,
+.badge-local {
+  opacity: 0.55;
+}
+
+/* --- preview ------------------------------------------------------------ */
+
+.preview {
+  padding: 16px;
+  background-color: color-mix(in srgb, currentColor 3%, transparent);
+}
+
+.preview-thumb {
+  margin-bottom: 12px;
+}
+
+.preview-thumb .thumb {
+  border-radius: 10px;
+}
+
+.preview-name {
+  font-weight: 700;
+  font-size: 1.05rem;
+}
+
+.preview-kind {
+  font-size: 0.85rem;
+  opacity: 0.6;
+  margin-bottom: 12px;
+}
+
+.preview-key {
+  font-size: 0.8rem;
+  opacity: 0.55;
+}
+
+.preview-value {
+  font-size: 0.85rem;
+}
+
+.preview-actions {
+  margin-top: 12px;
+}
+
+.preview-action {
+  padding: 6px 8px;
+  border-radius: 8px;
+}
+
+.preview-shortcut {
+  font-size: 0.75rem;
+  opacity: 0.6;
+}
+
+.preview-feedback {
+  margin-top: 6px;
+  font-size: 0.8rem;
+  color: var(--accent-color);
+}
+
+.preview-empty {
+  opacity: 0.2;
+}
+
+/* --- footer ------------------------------------------------------------- */
+
+.footer {
+  padding: 8px 16px;
+  border-top: 1px solid var(--border-color);
+}
+
+.footer-text {
+  font-size: 0.78rem;
+  opacity: 0.5;
+}
+
+statuspage.compact > scrolledwindow > viewport > box {
+  margin: 24px 12px;
+}
@@ -0,0 +1,72 @@
+/* Proton theme — the Proton web apps' Snow (light) and Carbon (dark) palettes.
+ *
+ * Loaded by main.rs after libadwaita's own stylesheet, which it re-applies on
+ * top of the user's GTK theme so that theme's hard-coded colours can't show
+ * through. Only libadwaita's colour variables are set here; every widget
+ * derives its look from them. Values from ProtonMail/WebClients,
+ * packages/colors/themes/src/{snow,carbon}/standard-base.css.
+ */
+
+:root {
+    --accent-bg-color: #6d4aff;
+    --accent-fg-color: #ffffff;
+    --destructive-bg-color: #dc3251;
+    --destructive-fg-color: #ffffff;
+    --error-bg-color: #dc3251;
+    --error-fg-color: #ffffff;
+    --success-bg-color: #1ea885;
+    --success-fg-color: #ffffff;
+    --warning-bg-color: #ff9900;
+    --warning-fg-color: rgb(0 0 0 / 80%);
+
+    --window-bg-color: #ffffff;
+    --window-fg-color: #0c0c14;
+    --view-bg-color: #ffffff;
+    --view-fg-color: #0c0c14;
+    --headerbar-bg-color: #ffffff;
+    --headerbar-fg-color: #0c0c14;
+    --headerbar-backdrop-color: #ffffff;
+    --sidebar-bg-color: #f5f4f2;
+    --sidebar-fg-color: #0c0c14;
+    --sidebar-backdrop-color: #f8f8f6;
+    --secondary-sidebar-bg-color: #f8f8f6;
+    --secondary-sidebar-fg-color: #0c0c14;
+    --secondary-sidebar-backdrop-color: #f8f8f6;
+    --card-bg-color: #f5f4f2;
+    --card-fg-color: #0c0c14;
+    --dialog-bg-color: #ffffff;
+    --dialog-fg-color: #0c0c14;
+    --popover-bg-color: #ffffff;
+    --popover-fg-color: #0c0c14;
+    --thumbnail-bg-color: #f5f4f2;
+    --thumbnail-fg-color: #0c0c14;
+}
+
+@media (prefers-color-scheme: dark) {
+    :root {
+        --destructive-bg-color: #f5385a;
+        --error-bg-color: #f5385a;
+
+        --window-bg-color: #1e1c26;
+        --window-fg-color: #ffffff;
+        --view-bg-color: #1e1c26;
+        --view-fg-color: #ffffff;
+        --headerbar-bg-color: #1e1c26;
+        --headerbar-fg-color: #ffffff;
+        --headerbar-backdrop-color: #1e1c26;
+        --sidebar-bg-color: #16141c;
+        --sidebar-fg-color: #ffffff;
+        --sidebar-backdrop-color: #16141c;
+        --secondary-sidebar-bg-color: #1a1821;
+        --secondary-sidebar-fg-color: #ffffff;
+        --secondary-sidebar-backdrop-color: #1a1821;
+        --card-bg-color: #292733;
+        --card-fg-color: #ffffff;
+        --dialog-bg-color: #292733;
+        --dialog-fg-color: #ffffff;
+        --popover-bg-color: #292733;
+        --popover-fg-color: #ffffff;
+        --thumbnail-bg-color: #292733;
+        --thumbnail-fg-color: #ffffff;
+    }
+}
@@ -0,0 +1,122 @@
+/* Proton Drive for Linux — app stylesheet.
+ *
+ * Colours come from the libadwaita palette (var(--accent-bg-color),
+ * var(--success-color), ...) so the app follows the system accent, light/dark
+ * and high contrast. The one exception is the photo viewer, which always sits
+ * on a near-black backdrop and so uses fixed light-on-dark colours. The Proton
+ * theme is opt-in and lives in its own provider (see main.rs and
+ * proton-theme.css).
+ */
+
+/* Brand */
+.brand-title { font-size: 1.6rem; font-weight: 800; }
+
+/* Sidebar footer */
+.sidebar-footer { padding: 6px 12px 12px 12px; }
+.sidebar-status { padding: 6px 8px; border-radius: 8px; }
+.sidebar-status image.success { color: var(--success-color); }
+.sidebar-status image.warning { color: var(--warning-color); }
+.sidebar-status image.error { color: var(--error-color); }
+.sidebar-quota progressbar trough, .sidebar-quota progressbar progress { min-height: 4px; }
+.sidebar-account { padding: 4px 4px 4px 8px; }
+/* A count of what waits on a page, at the end of its sidebar row */
+.sidebar-badge {
+  min-width: 10px;
+  padding: 0 7px;
+  border-radius: 999px;
+  background: alpha(currentColor, 0.15);
+  font-size: 0.8em;
+  font-weight: 700;
+}
+
+/* Sync page status card: the state is the headline, the detail explains it */
+.sync-card { padding: 18px 24px; }
+.sync-card-icon { padding: 6px; }
+.sync-card-icon.success { color: var(--success-color); }
+.sync-card-icon.warning { color: var(--warning-color); }
+.sync-card-icon.error { color: var(--error-color); }
+
+/* File browser */
+.file-grid { padding: 6px; }
+.file-tile { padding: 8px; border-radius: 10px; }
+.file-tile:hover { background: color-mix(in srgb, var(--accent-bg-color) 10%, transparent); }
+.file-tile:selected, .file-tile:hover:selected { background: color-mix(in srgb, var(--accent-bg-color) 20%, transparent); }
+.file-thumbnail { border-radius: 7px; }
+.file-badge { -gtk-icon-shadow: 0 1px 2px rgba(0, 0, 0, 0.5); }
+.badge-pinned { color: var(--success-color); }
+.badge-cached { color: var(--success-color); }
+.badge-cloud { color: color-mix(in srgb, currentColor 55%, transparent); }
+.browser-statusbar { background-color: alpha(currentColor, 0.025); }
+scale.browser-status-meter trough { min-width: 104px; min-height: 6px; }
+.bulk-bar { padding: 6px 8px; border-radius: 12px; background: color-mix(in srgb, var(--accent-bg-color) 12%, transparent); }
+.dropzone { border: 2px dashed alpha(currentColor, 0.25); border-radius: 16px; padding: 28px 18px; transition: background 160ms ease, border-color 160ms ease; }
+.dropzone-active { border-color: var(--accent-bg-color); background: color-mix(in srgb, var(--accent-bg-color) 10%, transparent); }
+.files-drop-active { outline: 2px dashed var(--accent-bg-color); outline-offset: -4px; border-radius: 12px; background: color-mix(in srgb, var(--accent-bg-color) 6%, transparent); }
+
+/* Photo viewer: always light-on-dark, whatever the system style */
+.photo-viewer-window { background-color: #111014; }
+.viewer-top-bar { background: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0)); padding: 10px 16px 28px 20px; color: white; }
+.viewer-title { font-weight: 700; font-size: 1.05rem; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9); color: white; }
+.viewer-counter { font-size: 0.8rem; color: rgba(255, 255, 255, 0.72); text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9); }
+.viewer-action-btn { color: white; background-color: rgba(255, 255, 255, 0.12); border-radius: 50%; min-width: 34px; min-height: 34px; margin-left: 4px; }
+.viewer-action-btn:hover { background-color: rgba(255, 255, 255, 0.28); color: white; }
+.viewer-action-btn:checked { background-color: var(--accent-bg-color); color: var(--accent-fg-color); }
+.viewer-close-btn { background-color: rgba(255, 255, 255, 0.2); margin-left: 10px; }
+.viewer-close-btn:hover { background-color: var(--destructive-bg-color); color: var(--destructive-fg-color); }
+.viewer-nav-btn { background-color: rgba(0, 0, 0, 0.45); color: white; margin: 20px; min-width: 44px; min-height: 44px; border-radius: 50%; opacity: 0.7; transition: opacity 150ms ease, background-color 150ms ease; }
+.viewer-nav-btn:hover { background-color: rgba(0, 0, 0, 0.85); color: white; opacity: 1; }
+.viewer-nav-btn:disabled { opacity: 0; }
+.photo-scrubber { background: linear-gradient(to left, alpha(var(--window-bg-color), 0.92) 40%, alpha(var(--window-bg-color), 0)); }
+.photo-scrubber-knob { background-color: var(--accent-bg-color); border-radius: 2px; }
+.photo-scrubber-bubble { font-weight: 600; background-color: var(--popover-bg-color); color: var(--popover-fg-color); border-radius: 999px; padding: 4px 12px; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3); }
+.viewer-spinner { color: white; }
+.viewer-status { color: white; font-size: 1rem; background-color: rgba(0, 0, 0, 0.75); padding: 12px 24px; border-radius: 12px; }
+.viewer-info-panel { background-color: var(--window-bg-color); border-left: 1px solid alpha(currentColor, 0.12); }
+
+/* Photos grid */
+.gallery-day { font-size: 0.82rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: alpha(currentColor, 0.65); padding: 2px 2px 6px 2px; }
+.photo-tile { padding: 0; margin: 0; min-height: 0; min-width: 0; border: none; border-radius: 4px; background: none; box-shadow: none; }
+.photo-tile:focus { outline: 2px solid var(--accent-color); outline-offset: -2px; }
+.photo-thumb { transition: transform 220ms ease; }
+.photo-tile:hover .photo-thumb { transform: scale(1.02); }
+.photo-check { color: white; background: rgba(0, 0, 0, 0.5); border-radius: 999px; padding: 3px; }
+.photo-check-on { background: var(--accent-bg-color); color: var(--accent-fg-color); }
+.photo-tile-selected { outline: 3px solid var(--accent-bg-color); outline-offset: -3px; }
+.photo-placeholder { color: alpha(currentColor, 0.35); background: alpha(currentColor, 0.07); }
+.photo-caption { font-size: 0.78rem; color: white; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9); padding: 22px 10px 6px 10px; opacity: 0; transition: opacity 180ms ease; }
+.photo-tile:hover .photo-caption { opacity: 1; background: linear-gradient(to top, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0)); }
+.photo-video-badge { color: white; background: rgba(0, 0, 0, 0.45); border-radius: 999px; padding: 8px; min-width: 20px; min-height: 20px; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5); transition: background 160ms ease; }
+.photo-video-badge-small { padding: 3px; min-width: 0; min-height: 0; }
+.photo-tile:hover .photo-video-badge { background: color-mix(in srgb, var(--accent-bg-color) 85%, transparent); }
+.photo-group-badge { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.04em; color: white; background: rgba(0, 0, 0, 0.55); border-radius: 6px; padding: 1px 5px; margin: 6px; text-shadow: 0 1px 2px rgba(0, 0, 0, 0.9); }
+.memory-card { padding: 0; border-radius: 12px; }
+.memory-cover { border-radius: 12px; background: alpha(currentColor, 0.06); }
+.memory-label { font-weight: 700; color: white; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9); padding: 22px 10px 6px 10px; background: linear-gradient(to top, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0)); }
+.album-card { padding: 0; border-radius: 16px; transition: background 180ms ease; }
+.album-card:hover { background: alpha(currentColor, 0.07); }
+.album-cover { border-radius: 16px; background: alpha(currentColor, 0.06); box-shadow: 0 4px 16px rgba(0, 0, 0, 0.32); transition: box-shadow 180ms ease; }
+.album-card:hover .album-cover { box-shadow: 0 10px 26px rgba(0, 0, 0, 0.5); }
+.album-card:hover .photo-thumb { transform: scale(1.05); }
+.view-switch button, .view-switch toggle { padding-left: 18px; padding-right: 18px; }
+
+/* Shared with Me: what a share lets me do, as a tinted pill beside the name. */
+.role-pill { padding: 2px 10px; border-radius: 999px; font-weight: 600; color: var(--accent-color); background-color: color-mix(in srgb, var(--accent-bg-color) 16%, transparent); }
+.role-pill.warning-pill { color: var(--warning-color); background-color: color-mix(in srgb, var(--warning-bg-color) 20%, transparent); }
+
+/* Activity: the feed sits on the window background as one card per row, under
+ * day headings, like a boxed list with its rows set apart. */
+listview.activity-feed { background: none; color: inherit; padding: 0 12px 18px 12px; }
+listview.activity-feed > row { padding: 0; margin-bottom: 6px; background: none; }
+listview.activity-feed > header { padding: 18px 6px 6px 6px; background: none; }
+listview.activity-feed row.card { border-radius: 12px; }
+
+/* Photos: how many timeline filters are on, as a small badge on the Filters button. */
+.filter-count { min-width: 18px; padding: 0 5px; border-radius: 999px; font-size: 0.8em; font-weight: 700; color: var(--accent-fg-color); background-color: var(--accent-bg-color); }
+/* The Places map: sea and land come in the map's own colours; markers (drawn
+ * in the area's own colour) in the accent. */
+.places-map-frame { border-radius: 12px; }
+.places-map { color: var(--accent-bg-color); }
+/* Credit on the Places street map, in the corner as on every web map. */
+.places-spot-photo { padding: 0; }
+.places-spot-photo picture { border-radius: 6px; overflow: hidden; }
+.places-map-credit { padding: 2px 8px; border-top-left-radius: 8px; color: var(--window-fg-color); background: color-mix(in srgb, var(--window-bg-color) 80%, transparent); }
@@ -0,0 +1,139 @@
+//! Dates and times as the app shows them, so every page words a moment the
+//! same way.
+//!
+//! - [`relative`] for "when did this happen" in lists: "Just now", "5 min
+//!   ago", "Yesterday, 14:05", "Tuesday", then a date.
+//! - [`short_date`] for date columns: "Sep 23", with the year only when it is
+//!   not this year.
+//! - [`full`] for tooltips: the weekday, date, year and time.
+//!
+//! The formats are `strftime` patterns that go through gettext, so they follow
+//! the language picked in Preferences, not only the system locale.
+
+use gtk4::glib;
+
+use crate::{gettext, gettext_f, ngettext_f};
+
+/// Seconds in a day, for the "within the last week" checks.
+const DAY: i64 = 86_400;
+
+/// A past moment in epoch seconds, relative to now. Empty when the time can't
+/// be read.
+pub(crate) fn relative(secs: i64) -> String {
+    match (
+        glib::DateTime::from_unix_local(secs),
+        glib::DateTime::now_local(),
+    ) {
+        (Ok(at), Ok(now)) => relative_to(&at, &now),
+        _ => String::new(),
+    }
+}
+
+/// [`relative`] for a fixed `now`, so it can be tested.
+pub(crate) fn relative_to(at: &glib::DateTime, now: &glib::DateTime) -> String {
+    let ago = now.to_unix() - at.to_unix();
+    // A clock a little ahead of ours still reads as "just now".
+    if (-60..60).contains(&ago) {
+        return gettext("Just now");
+    }
+    if (60..3600).contains(&ago) {
+        let minutes = (ago / 60) as u64;
+        return ngettext_f("{n} min ago", "{n} min ago", minutes, &[]);
+    }
+    // Translators: strftime format for a time of day, such as "14:05".
+    let time = || format(at, &gettext("%H:%M"));
+    if at.ymd() == now.ymd() {
+        return time();
+    }
+    if now.add_days(-1).is_ok_and(|y| y.ymd() == at.ymd()) {
+        // Translators: {time} is a time of day, such as "14:05".
+        return gettext_f("Yesterday, {time}", &[("time", &time())]);
+    }
+    if (0..6 * DAY).contains(&ago) {
+        return format(at, "%A");
+    }
+    short_date_to(at, now)
+}
+
+/// A date in epoch seconds, without the time. Empty when the time can't be
+/// read.
+pub(crate) fn short_date(secs: i64) -> String {
+    match (
+        glib::DateTime::from_unix_local(secs),
+        glib::DateTime::now_local(),
+    ) {
+        (Ok(at), Ok(now)) => short_date_to(&at, &now),
+        _ => String::new(),
+    }
+}
+
+/// [`short_date`] for a fixed `now`, so it can be tested.
+pub(crate) fn short_date_to(at: &glib::DateTime, now: &glib::DateTime) -> String {
+    let pattern = if at.year() == now.year() {
+        // Translators: strftime format for a date in this year, such as "Sep 23".
+        gettext("%b %-d")
+    } else {
+        // Translators: strftime format for a date in another year, such as "Sep 23, 2025".
+        gettext("%b %-d, %Y")
+    };
+    format(at, &pattern)
+}
+
+/// The whole moment in epoch seconds, for a tooltip. Empty when the time
+/// can't be read.
+pub(crate) fn full(secs: i64) -> String {
+    glib::DateTime::from_unix_local(secs)
+        .map(|at| {
+            // Translators: strftime format for a full date and time, such as
+            // "Wednesday, September 23, 2026, 14:05".
+            format(&at, &gettext("%A, %B %-d, %Y, %H:%M"))
+        })
+        .unwrap_or_default()
+}
+
+fn format(at: &glib::DateTime, pattern: &str) -> String {
+    at.format(pattern)
+        .map(|s| s.trim().to_string())
+        .unwrap_or_default()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn at(y: i32, m: i32, d: i32, h: i32, min: i32) -> glib::DateTime {
+        glib::DateTime::from_local(y, m, d, h, min, 0.0).unwrap()
+    }
+
+    #[test]
+    fn relative_times_get_coarser_with_age() {
+        let now = at(2026, 9, 23, 15, 0);
+        assert_eq!(relative_to(&at(2026, 9, 23, 14, 59), &now), "1 min ago");
+        assert_eq!(relative_to(&at(2026, 9, 23, 14, 55), &now), "5 min ago");
+        assert_eq!(relative_to(&at(2026, 9, 23, 9, 5), &now), "09:05");
+        assert_eq!(
+            relative_to(&at(2026, 9, 22, 14, 5), &now),
+            "Yesterday, 14:05"
+        );
+        assert_eq!(relative_to(&at(2026, 9, 20, 10, 0), &now), "Sunday");
+        assert_eq!(relative_to(&at(2026, 9, 1, 10, 0), &now), "Sep 1");
+        assert_eq!(relative_to(&at(2024, 3, 5, 10, 0), &now), "Mar 5, 2024");
+    }
+
+    #[test]
+    fn a_moment_ago_or_slightly_ahead_is_just_now() {
+        let now = at(2026, 9, 23, 15, 0);
+        assert_eq!(relative_to(&now, &now), "Just now");
+        assert_eq!(
+            relative_to(&at(2026, 9, 23, 15, 0), &now.add_seconds(30.0).unwrap()),
+            "Just now"
+        );
+    }
+
+    #[test]
+    fn short_dates_show_the_year_only_when_it_differs() {
+        let now = at(2026, 9, 23, 15, 0);
+        assert_eq!(short_date_to(&at(2026, 1, 2, 8, 0), &now), "Jan 2");
+        assert_eq!(short_date_to(&at(2025, 12, 31, 8, 0), &now), "Dec 31, 2025");
+    }
+}
@@ -0,0 +1,179 @@
+//! The window's side of the daemon's event feed ([`Request::Subscribe`]).
+//!
+//! The window used to ask the daemon for its status every two seconds and let
+//! pages re-read themselves on timers. Now one thread follows the feed and hands
+//! each event to the main loop: a status or transfers snapshot is painted as it
+//! comes, and a change reloads the page on screen if the page shows it. A
+//! window nobody can see keeps its changes for later and catches up when it is
+//! focused again.
+
+use std::collections::BTreeSet;
+
+use pdfs_core::control::{Event, Feed, follow};
+
+use crate::*;
+
+/// How long the conflict list waits after a change before it is read again.
+/// Listing walks every node the daemon knows, and a sync pass can report
+/// changes many times a second.
+const CONFLICTS_DEBOUNCE: Duration = Duration::from_secs(3);
+
+/// How long the import's state waits after its progress moved before it is
+/// read again.
+const TAKEOUT_DEBOUNCE: Duration = Duration::from_secs(2);
+
+/// How old the invitations may be when the window is focused. Another person
+/// inviting this account sends the daemon no event, so focus is when they are
+/// looked for.
+const INVITATIONS_ON_FOCUS: Duration = Duration::from_secs(60);
+
+/// What the feed keeps between events.
+#[derive(Default)]
+struct FeedState {
+    /// What changed while the window was out of sight.
+    deferred: RefCell<BTreeSet<Topic>>,
+    /// Whether a conflict read is already waiting out [`CONFLICTS_DEBOUNCE`].
+    conflicts_pending: Rc<Cell<bool>>,
+    /// Whether an import read is already waiting out [`TAKEOUT_DEBOUNCE`].
+    takeout_pending: Rc<Cell<bool>>,
+}
+
+/// Follow the daemon for as long as `window` is open.
+pub(crate) fn follow_daemon(ui: &Rc<Ui>, window: &adw::ApplicationWindow) {
+    let (tx, rx) = async_channel::bounded(64);
+    let socket = ui.dirs.control_socket();
+    let spawned = std::thread::Builder::new()
+        .name("pdfs-feed".into())
+        .spawn(move || follow(&socket, |feed| tx.send_blocking(feed).is_ok()));
+    if let Err(e) = spawned {
+        tracing::error!("cannot start the event feed: {e}");
+        return;
+    }
+
+    let state = Rc::new(FeedState::default());
+    let ui_feed = ui.clone();
+    let state_feed = state.clone();
+    let window_feed = window.downgrade();
+    let rx_feed = rx.clone();
+    glib::spawn_future_local(async move {
+        while let Ok(feed) = rx_feed.recv().await {
+            let hidden = window_feed.upgrade().is_none_or(|w| window_hidden(&w));
+            on_feed(&ui_feed, &state_feed, feed, hidden);
+        }
+    });
+
+    // Catch up as soon as the user comes back to the window.
+    let ui_focus = ui.clone();
+    window.connect_is_active_notify(move |window| {
+        if !window.is_active() {
+            return;
+        }
+        let topics: Vec<Topic> = state.deferred.take().into_iter().collect();
+        if !topics.is_empty() {
+            follow_changes(&ui_focus, &state, &topics);
+        }
+        refresh_quota(&ui_focus);
+        refresh_invitations_badge(&ui_focus, INVITATIONS_ON_FOCUS);
+    });
+    // Closing the channel ends the loop above, and the thread with the next
+    // event it tries to hand over.
+    window.connect_close_request(move |_| {
+        rx.close();
+        glib::Propagation::Proceed
+    });
+}
+
+fn on_feed(ui: &Rc<Ui>, state: &Rc<FeedState>, feed: Feed, hidden: bool) {
+    match feed {
+        // The daemon follows up with its whole state, so there is nothing to
+        // ask for here.
+        Feed::Connected | Feed::Event(Event::Heartbeat) => {}
+        Feed::Event(Event::Status(status)) => {
+            paint_status(ui, *status);
+            // Uploads are what move the quota, and they move the status too.
+            refresh_quota(ui);
+        }
+        // Painted even out of sight: the end of a batch is what sends the
+        // "Sync complete" notification.
+        Feed::Event(Event::Transfers { items, jobs }) => {
+            repaint_transfers(ui, &items, &jobs);
+            follow_takeout(ui, state, &jobs);
+        }
+        Feed::Event(Event::Changed { topics }) if hidden => {
+            state.deferred.borrow_mut().extend(topics);
+        }
+        Feed::Event(Event::Changed { topics }) => follow_changes(ui, state, &topics),
+        // Ask once, which paints "not connected" or "not responding", and clear
+        // progress that can no longer move.
+        Feed::Disconnected => {
+            refresh_status(ui);
+            repaint_transfers(ui, &[], &[]);
+        }
+    }
+}
+
+/// Reload what `topics` says changed: the sidebar badges wherever the user
+/// is, and the page on screen if it shows one of them.
+fn follow_changes(ui: &Rc<Ui>, state: &FeedState, topics: &[Topic]) {
+    let changed = |topic| topics.contains(&topic);
+    if changed(Topic::Conflicts) {
+        let ui = ui.clone();
+        debounce(&state.conflicts_pending, CONFLICTS_DEBOUNCE, move || {
+            refresh_conflicts(&ui);
+            if activity_visible(&ui) {
+                refresh_activity_conflicts(&ui, true);
+            }
+        });
+    }
+    if changed(Topic::Shares) {
+        refresh_invitations_badge(ui, Duration::ZERO);
+    }
+    match ui.stack.visible_child_name().as_deref() {
+        Some("browser") if changed(Topic::Files) => load_browser(ui),
+        // The timeline is left alone: reloading it would throw away the place
+        // the user scrolled to. F5 reloads it on request.
+        Some("gallery")
+            if changed(Topic::Photos)
+                && ui.gallery.content.visible_child_name().as_deref() == Some("albums") =>
+        {
+            load_albums(ui)
+        }
+        Some("trash") if changed(Topic::Trash) => load_trash(ui),
+        Some("shared") if changed(Topic::Shares) => load_shared(ui),
+        Some("sharedbyme") if changed(Topic::Shares) || changed(Topic::Files) => {
+            load_shared_by_me(ui)
+        }
+        Some("devices") if changed(Topic::Devices) => load_devices(ui),
+        Some("locations") => follow_sync_view(ui, topics),
+        _ => {}
+    }
+}
+
+/// Read the import's state again while its progress moves, and once more after
+/// it stops, which is how a finished import is noticed. Nothing is read while
+/// no import runs and the page is elsewhere.
+fn follow_takeout(ui: &Rc<Ui>, state: &FeedState, jobs: &[JobItem]) {
+    let importing = jobs.iter().any(|job| job.title == IMPORT_JOB);
+    if importing
+        || ui.takeout.running.get()
+        || ui.stack.visible_child_name().as_deref() == Some("takeout")
+    {
+        let ui = ui.clone();
+        debounce(&state.takeout_pending, TAKEOUT_DEBOUNCE, move || {
+            refresh_takeout(&ui)
+        });
+    }
+}
+
+/// Run `f` once `delay` has passed, unless a run is already waiting. The run
+/// sees everything that happened up to it, so nothing is missed by skipping.
+fn debounce(pending: &Rc<Cell<bool>>, delay: Duration, f: impl FnOnce() + 'static) {
+    if pending.replace(true) {
+        return;
+    }
+    let pending = pending.clone();
+    glib::timeout_add_local_once(delay, move || {
+        pending.set(false);
+        f();
+    });
+}