Un-gates music libraries; adds CardShape.square plumbing (circular
artists), artists/albums/tracks browse groupings with per-grouping
sorts, audio playlists tab, artist + album detail screens with dpad
track rows, music context-menu actions, and a stub MusicPlaybackService
seam for the upcoming engine.
The library Recommended tab never subscribed to deletion events, so
"Delete from server" left the episode sitting in Continue Watching
until a full reload. Make the tab DeletionAware (remove in place across
all hubs, then resync) and give DiscoverProvider the same subscription
so the home row and hubs drop deleted items too.
close#1486
Profile traces showed 100-370ms UI-thread frames while scrolling the
library screen, dominated by rebuilding and inflating media cards.
- Gate per-card focus/pointer chrome on input mode: FocusableWrapper
skips the scale/border wrappers and creates its AnimationController
lazily outside keyboard mode, and ClickableCursor plus the card tap
region only build MouseRegion/InkWell machinery on desktop - TV and
touch use a bare GestureDetector. Hub cards also drop their outer
gesture wrapper outside keyboard mode; the card's own tap region
always won the gesture arena anyway.
- Memoize sliver children (SliverChildMemo): browse/collections grids
and hub rows return identical widget instances for unchanged items,
so delegate swaps from pagination, watch-state, and deletion
setStates no longer rebuild every realized card inside layout. The
browse tab prunes the memo in lockstep with focus-node eviction so a
cached card can never resurrect a disposed FocusNode.
- Budget fresh inflation (CardInflationBudget): while a scrollable is
moving in pointer/touch mode at most one new card inflates per frame,
the rest render as SkeletonMediaCard and upgrade on following frames.
Hub rows also stop pre-inflating 250px of off-screen cards on entry.
Device traces: worst frame 373ms -> 103ms, per-card build 3.6ms ->
2.4ms median; remaining row-entry work is spread across frames.
Badge the mobile Library options icon with a dot while filters are
active, and replace the "This library is empty" state with a
"No items match the active filters" message plus a reset button.
close#1470
Poster images are decorative (the card exposes one merged node), and
the default per-child AutomaticKeepAlive/_SelectionKeepAlive/
IndexedSemantics wrappers are inert here — no keep-alive clients or
SelectionArea exist. The semantics phase ran ~9ms every frame on TV
devices with an accessibility service; it scales with node count.
The browse grid listens for DeletionEvents and decrements each show's
leafCount, evicting the show when the count hits zero. Download-only
deletions (isDownloadOnly: true) fired one event per episode, so deleting
every downloaded episode of a show drove its leafCount to zero and removed
it from browse - even though the content still exists on the server.
Browse is online-only (the Libraries tab is hidden when offline) and always
reflects server-side content, so it must ignore download-only deletions.
Add a guard at the top of onDeletionEvent, matching the existing
isDownloadOnly contract already honored by media_detail_screen.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
edde746