feat(core,fuse,gui,cli): album management

New requests CreateAlbum, RenameAlbum, DeleteAlbum, AddToAlbum and
RemoveFromAlbum, backed by proton-drive-rs 0.6.6. The Albums view gains a
New Album button and a card menu with Rename and Delete; photos gain Add
to Album (menu and selection bar) and Remove from Album inside an album.
CLI: pdfs new-album, rename-album, delete-album, add-to-album,
remove-from-album.

Also fixes the album view state: the timeline filters are hidden on the
album grid, the header counts albums, Back keeps the grid and its scroll
position, and the timeline is only reloaded when an album replaced it.

crates/pdfs-gui/src/app/main.rs

@@ -475,6 +475,8 @@ fn build_window(app: &adw::Application) {
             view_switch: gallery_widgets.view_switch.clone(),
             albums_loading: Cell::new(false),
             album: RefCell::new(None),
+            timeline_stale: Cell::new(false),
+            album_list: RefCell::new(Vec::new()),
             back: gallery_widgets.back.clone(),
             filters: gallery_widgets.filters.clone(),
             kind: Cell::new(None),
@@ -506,6 +508,7 @@ fn build_window(app: &adw::Application) {
             select_bar: gallery_widgets.select_bar.clone(),
             select_label: gallery_widgets.select_label.clone(),
             select_trash: gallery_widgets.select_trash.clone(),
+            select_album: gallery_widgets.select_album.clone(),
         },
         shared: SharedState {
             content: shared_widgets.content.clone(),
@@ -1143,6 +1146,12 @@ fn install_window_actions(ui: &Rc<Ui>, window: &adw::ApplicationWindow) {
     show_import.connect_activate(move |_, _| ui_import.stack.set_visible_child_name("takeout"));
     window.add_action(&show_import);
 
+    // The Albums view's New Album button.
+    let new_album = gio::SimpleAction::new("new-album", None);
+    let ui_album = ui.clone();
+    new_album.connect_activate(move |_, _| prompt_new_album(&ui_album, Vec::new()));
+    window.add_action(&new_album);
+
     let shortcuts = gio::SimpleAction::new("shortcuts", None);
     let win = window.clone();
     shortcuts.connect_activate(move |_, _| show_shortcuts(&win));