Extend the keyboard multi-select feature to the surfaces that had no
working selection in the Slint port.
- Mix (DailyQ/WeeklyQ/FavQ/TopQ all render through one MixView): mode
toggle + MultiSelectBar, per-row checkbox via the central toggle arm + a
ContentView::Mix branch (model + recount), bulk play-next/queue/
add-to-playlist. Shift-range, Ctrl+A and Escape inherited automatically.
- Label Popular Tracks: was a dead stub (checkboxes with no bar/recount/
router arms). Converted the local mode flag to LabelState.multi-select,
added a real MultiSelectBar + label.rs recount/select_all/clear/selected,
and the missing select-toggle/bulk router arms.
- LocalLibrary Albums grid (a previously-missing surface): AlbumCardItem
gains a `selected` field; a `select-mode` prop is threaded through the
shared AlbumCard / AlbumListRow / AlbumGrid / AlbumCollectionView (default
false, so Discover/Label/Favorites are untouched). Albums toolbar toggle
+ MultiSelectBar; local_library.rs album select fns (flat + grouped,
id-resilient Shift-range over AlbumCardItem); album->tracks bulk resolve
via fetch_album_tracks_blocking on spawn_blocking for queue/play-next/
add-to-playlist/add-to-mixtape; Ctrl+A and Escape routed by active-tab.
cargo check -p qbz green (qbz_ui compiles clean).
cc
vicrodh
acfd3d928d