proton-stream/PLAN.md

# Android plan

Where the Android client stands against the desktop app, and what to change to
make it feel like a modern streaming app rather than a settings form with a
player attached. Written 2026-10-03 from a source review and four screenshots
(Library, Title, Shares, Settings) taken on a phone running v0.5.0.

Android last caught up with the desktop on 2026-08-10 (`4ef6225`); the desktop
gained about twenty features on 2026-10-02 that Android does not have.

## Status (2026-10-03)

Done: section 0, every parity item, and every recommendation in section 2 —
the Library, Title, Shares, Settings and Downloads redesigns, per-page app
bars drawn edge to edge, search behind an icon, skeleton loading and
generated placeholder art, Settings sub-pages and a language picker, a
long-press Change match, Inter, light and tablet screenshots, the library
and a title side by side from 840 dp, a poster-to-backdrop shared element
transition, and predictive back on the title page.

Two departures from the text below. The tablet layout is a two-pane `Row`
rather than `ListDetailPaneScaffold`, which would have added the
`adaptive-layout` artifact for one split. Pull to refresh shows the
indicator while a crawl runs, but not the crawl's progress.

Not yet verified on a device; the host gate (ktlint, unit and screenshot
tests) passes, and Android lint runs in CI.

## 0. CI (done)

Every `Android` workflow run since August failed in `:app:buildRustHost`:
`pstr-core` pulls `keyring` → `dbus-secret-service` → `libdbus-sys`, which needs
`libdbus-1-dev` on the host. Because no run ever succeeded, no cache was ever
saved, so each run started from nothing.

- `libdbus-1-dev` added to both jobs' apt install.
- `Swatinem/rust-cache` shares one key between the two jobs and saves on failure.
- `android/app/build/generated/mpv` is cached on the hash of
  `scripts/build-libmpv-android.sh`; the script writes a `STAMP` (revision plus
  its own hash) last and skips the whole libmpv build when the stamp matches.

Later runs also needed meson 1.12.1 from PyPI (noble's 1.3.2 is too old for
the pinned fontconfig), libmpv built and cached in its own steps so a later
failure keeps it, and lint's `OldTargetApi` made informational. A cached run
restores libmpv in under a minute.

## 1. Desktop parity

Ordered by value on a phone.

1. **Open share links from outside the app.** The manifest has only the
   launcher intent. Add an `ACTION_VIEW` filter for `drive.proton.me/urls/*` and
   an `ACTION_SEND` (`text/plain`) filter; both open the add-share dialog with
   the link filled in. Desktop: `4a54af3`, `53a1d0a`.
2. **Streaming cache budget.** Android runs on the fixed 4 GiB default
   (`DiskCacheConfig::DEFAULT_BUDGET_BYTES`), large for a phone. Expose
   `DiskCache::set_budget` through `pstr-android`, add a 1–16 GiB choice with a
   usage readout under Storage. Desktop: `a432a93`.
3. **Hardware-decoding switch.** `pstr_mpv.cpp` hard-codes
   `hwdec=auto-copy-safe`; a device with green frames has no way out. A
   Settings toggle, applied from the next file.
4. **Episode list in the player.** A bottom sheet (portrait) or side panel
   (landscape) with the title's episodes, opened on the playing season and
   scrolled to the playing episode. Desktop: `7e734db`.
5. **Long-press menu on tiles.** Play/resume, mark watched or unwatched,
   download, change match, remove from Continue watching, in a
   `ModalBottomSheet`. Desktop: `c5808a5`.
6. **Undo on snackbars** for marking a title and leaving Continue watching.
   `AppUiState.message` is a bare string today; it needs an action. Desktop:
   `79c3f68`.
7. **History tab.** Needs a bridge call over the `pstr-core::library` query
   the desktop page uses. Desktop: `e7eeaa5`.
8. **Buffered range on the seek bar** from mpv's `demuxer-cache-time`.
9. **Up-next card** with the next episode's still and a countdown ring instead
   of "Up next in 7s" text.
10. **Featured banner** at the top of the library. Desktop: `7d03736`.
11. **Bundled Inter** in `ui/theme/Type.kt`, so both clients read the same.
    Desktop: `558446b`.

## 2. UI recommendations

### Everywhere

- **Colours stay the theme's.** The red is the Persona theme's accent and the
  card tint comes from the shared palette, so the redesign changes layout and
  button hierarchy, not colours.
- **One button hierarchy.** At most one filled accent button per screen;
  secondary actions tonal or outlined; destructive actions behind a menu and a
  confirmation, never a filled red button in a list row.
- **Edge-to-edge, per-screen titles.** The "proton-stream" app bar on every
  page wastes a band of height. Library uses a collapsing large title; Title
  pages draw the backdrop under the status bar; other tabs use their name.
- **Skeletons instead of spinners** for library and title loading, and
  generated placeholder art (gradient from the accent plus the title's
  initials) instead of a black card with a play triangle (Akira).
- **Pull-to-refresh** (`PullToRefreshBox`) replaces the top-bar refresh icon,
  with crawl progress shown in the indicator area.
- **Split `ui/ProtonStreamApp.kt`** (1665 lines) into one file per screen
  before the work below; every item touches it.

### Library

- Poster grid (2:3, `posterUrl`) at three columns on a phone, title under the
  poster with no card body. The current 210 dp cropped backdrops fit two titles
  per screen.
- Continue watching: 16:9 still with the progress bar laid over the bottom
  edge of the image and "S03E11 · 12 min left" under it.
- Search becomes an icon in the app bar that expands into an M3 `SearchBar`,
  instead of a permanent field above everything.
- Fix "1 episodes" (line ~507; the season header already pluralises).

### Title page

- Full-bleed backdrop with a gradient scrim, poster, title and meta chips
  (year, score, genres) over it, collapsing as the page scrolls.
- Synopsis clamped to three lines with "More".
- One full-width primary button, "Resume S03E11" or "Play S01E01", then a row
  of icon actions: download, mark watched, and a ⋮ menu holding Start over,
  Change match and More on AniList. Today five buttons of three styles wrap
  over three lines.
- Drop the "Preferred tracks" form and its Save button from this page. The
  player already remembers tracks by name per title (`d3c5f07`); expose any
  override from the player's track chooser.
- Season picker as a dropdown chip or tabs, not stacked accordions; a 40
  episode title is one long scroll today.
- Episode rows: 16:9 still with progress overlay, "1 · Mother and Children"
  (provider name, else "Episode 1") rather than the raw file name
  `[Judas] Oshi no Ko - S01E01.mkv`, runtime or air date as supporting text,
  watched and download state as small trailing icons. The red `S01E01` label
  above each row goes.

### Shares

- `ListItem` rows: name, "12 titles · crawled 2 h ago" or the failure, and a ⋮
  menu with Refresh, Re-enter link and Remove (confirmed). The current row
  wraps "Custom password stored securely" over three lines beside three
  differently styled actions.
- "Add share" as an extended FAB, which is also where the share-link intent
  from parity item 1 lands.

### Settings

- Grouped `ListItem` rows (headline, one line of supporting text, trailing
  switch), with the long explanations moved into the supporting line or an
  info dialog. Today each toggle carries a paragraph.
- Split into sub-pages once storage and decoding settings land: Playback,
  Downloads & storage, Appearance, Metadata, About.
- Language fields become a picker dialog over a language list, not free text.
- Storage shows a usage bar (cache, offline episodes) above the budget choice.

### Robustness

- Screenshot tests (Roborazzi, JVM, no device) for each screen in light and
  dark, phone and tablet, at font scale 1.0 and 1.5 — the redesign changes
  every screen, and `docs/TESTING.md` has no visual layer today.
- 48 dp minimum touch targets and content descriptions on the new icon-only
  actions.
- Tablet: `ListDetailPaneScaffold` for library + title, since
  `NavigationSuiteScaffold` already switches to a rail there.
- Shared-element transition from a poster to its title page, and predictive
  back.

## Suggested order

1. CI green (section 0).
2. Split `ProtonStreamApp.kt`; add screenshot tests for the current screens.
3. Parity 1–3 (small, phone-specific fixes).
4. Button hierarchy and Inter — every later screen inherits them.
5. Title page, then Library, then Shares and Settings.
6. Parity 4–10.