fix(core,fuse,gui): UI/UX quick wins from the audit (phase 0)

- Move Google Takeout import out of Settings; Photos owns it, and the
  Takeout page's back button returns there.
- Trash from the file browser is Undo-only (no confirm); F2 on a
  multi-selection explains why it does nothing.
- Ask before sign-out, rejecting an invitation, removing someone's access,
  removing a public link, and switching a folder to on-demand.
- Clearer offline wording ("Make available offline" / "Make online only")
  with dedicated offline, online-only and upload symbolic icons; the pin row
  is hidden for folders.
- Search hits report whether a file is cached, so search results show the
  offline badge.
- Activity log: readable Empty Trash / link entries, distinct icons, and
  error/warning styling for failures and conflicts.
- Proper singular/plural counts instead of "item(s)" / "archive(s)".
- Name earlier versions by save time instead of revision id; capitalise
  the public link role; stop-syncing uses a stop icon, not a trash can.
- Label the Photos Upload and "Show on map" buttons; toast when a
  thumbnail build finishes; the versions button follows the mount state.
- Mode switches and device mutations reload both sync pages.

crates/pdfs-gui/src/app/widgets/details.rs

@@ -89,7 +89,7 @@ pub(crate) fn build_details_pane() -> (gtk4::Widget, DetailsWidgets) {
     let offline = adw::PreferencesGroup::new();
     let pin_row = adw::SwitchRow::builder()
         .title("Available offline")
-        .subtitle("Keep a local copy on this device.")
+        .subtitle("Keep a copy on this computer, even without a connection.")
         .build();
     offline.add(&pin_row);
 
@@ -208,7 +208,7 @@ pub(crate) fn wire_details(ui: &Rc<Ui>) {
     ui.details.details.trash_button.connect_clicked(move |_| {
         let entry = ui_trash.details.details_entry.borrow().clone();
         if let Some(entry) = entry {
-            prompt_delete(&ui_trash, &entry);
+            trash_entry(&ui_trash, &entry);
         }
     });
     let ui_pin = ui.clone();
@@ -256,7 +256,10 @@ pub(crate) fn show_details(ui: &Rc<Ui>, entry: &DirEntry) {
     } else {
         parent
     });
+    // Pinning is per file: the context menu and the selection bar offer it for
+    // files only, so the pane must not offer it for folders either.
     d.pin_row.set_active(entry.pinned);
+    d.pin_row.set_visible(!entry.is_dir);
     d.pin_row.set_sensitive(*ui.mounted.borrow());
     d.open_button
         .set_label(if entry.is_dir { "Open folder" } else { "Open" });

crates/pdfs-gui/src/app/widgets/share_dialog.rs

@@ -361,13 +361,24 @@ pub(crate) fn repaint_share_people(state: &Rc<ShareDialog>, entries: &[ShareEntr
         let state_rm = state.clone();
         let id = entry.id.clone();
         let kind = entry.kind;
-        remove.connect_clicked(move |_| {
-            share_dialog_op(
-                &state_rm,
-                state_rm.target.remove_entry(id.clone(), kind),
-                "Access removed",
-                "Couldn't remove access",
-                None,
+        let who = entry.email.clone();
+        remove.connect_clicked(move |btn| {
+            let state = state_rm.clone();
+            let id = id.clone();
+            confirm_destructive(
+                btn,
+                "Remove Access?",
+                &format!("{who} will no longer be able to open this item."),
+                "Remove",
+                move || {
+                    share_dialog_op(
+                        &state,
+                        state.target.remove_entry(id.clone(), kind),
+                        "Access removed",
+                        "Couldn't remove access",
+                        None,
+                    );
+                },
             );
         });
         row.add_suffix(&remove);
@@ -390,9 +401,12 @@ pub(crate) fn repaint_share_link(state: &Rc<ShareDialog>, link: Option<&PublicLi
         Some(link) => {
             let url = link.url.clone().unwrap_or_default();
             let subtitle = if link.has_password {
-                format!("Anyone with the link ({}) · password-protected", link.role)
+                format!(
+                    "Anyone with the link ({}) · password-protected",
+                    capitalize(&link.role)
+                )
             } else {
-                format!("Anyone with the link ({})", link.role)
+                format!("Anyone with the link ({})", capitalize(&link.role))
             };
             let row = adw::ActionRow::builder()
                 .title(if url.is_empty() { "Public link" } else { &url })
@@ -424,13 +438,24 @@ pub(crate) fn repaint_share_link(state: &Rc<ShareDialog>, link: Option<&PublicLi
             remove.add_css_class("flat");
             let state_rm = state.clone();
             let id = link.id.clone();
-            remove.connect_clicked(move |_| {
-                share_dialog_op(
-                    &state_rm,
-                    state_rm.target.remove_link(id.clone()),
-                    "Public link removed",
-                    "Couldn't remove the link",
-                    None,
+            remove.connect_clicked(move |btn| {
+                let state = state_rm.clone();
+                let id = id.clone();
+                confirm_destructive(
+                    btn,
+                    "Remove Public Link?",
+                    "The link stops working for everyone who has it. A new link will have \
+                     a different address.",
+                    "Remove Link",
+                    move || {
+                        share_dialog_op(
+                            &state,
+                            state.target.remove_link(id.clone()),
+                            "Public link removed",
+                            "Couldn't remove the link",
+                            None,
+                        );
+                    },
                 );
             });
             row.add_suffix(&remove);

crates/pdfs-gui/src/app/widgets/versions_dialog.rs

@@ -182,16 +182,20 @@ fn repaint_versions(state: &Rc<VersionsDialog>, items: &[RevisionInfo]) {
             .filter(|size| *size >= 0)
             .unwrap_or(item.size_on_storage)
             .max(0) as u64;
-        let mut subtitle = format!("{} · {}", activity_time(item.created), human_bytes(size));
+        // A revision id means nothing to a person; name earlier versions by
+        // when they were saved instead.
+        let (title, mut subtitle) = if item.is_active {
+            (
+                "Current version".to_string(),
+                format!("{} · {}", activity_time(item.created), human_bytes(size)),
+            )
+        } else {
+            (activity_time(item.created), human_bytes(size))
+        };
         if let Some(email) = &item.signed_by {
             subtitle.push_str(" · ");
             subtitle.push_str(email);
         }
-        let title = if item.is_active {
-            "Current version".to_string()
-        } else {
-            format!("Version {}", item.id)
-        };
         let row = adw::ActionRow::builder()
             .title(title)
             .subtitle(subtitle)