The lockscreen controls drifted out of sync, especially while casting, and
couldn't control remote playback. Two media sessions were competing (a Media3
MediaSession driving transport vs a MediaSessionCompat driving the notification),
position was only pushed on play/pause so the scrubber froze mid-track, and
remote mode showed stale local metadata with dead buttons.
- Make MediaSessionCompat the single source of truth; route all transport
commands (both the Compat callback and the Media3 wrappedPlayer) through Rust
via nativeOnMediaCommand instead of touching ExoPlayer directly.
- Push position on every 250ms tick via a lightweight updatePlaybackPosition,
and report 0.0 playback speed when paused so Android stops extrapolating.
- Mirror the remote session's now-playing onto the lockscreen from the native
session poller (works while the screen is locked, unlike WebView timers) via
a new player::update_lockscreen_metadata JNI bridge.
- Make MediaSessionHandler mode-aware: in remote mode forward play/pause/next/
prev/seek to the remote Jellyfin session; Stop while casting emits
RemoteDisconnectRequested, which the frontend handles by transferring to local.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- music landing: diverse per-genre album sliders (online counts /
offline wide-probe fallback) and home-screen library shortcuts
- add ArtistLinks component and shared navigation/genreDiversity utils
- player/playback-mode refinements across Rust and frontend
Workstream A — poison-tolerant locking:
- Add utils/lock.rs with MutexSafe/RwLockSafe extension traits that recover a
poisoned std::sync lock instead of panicking, plus unit tests.
- Replace all 153 .lock().unwrap() and 4 .read()/.write().unwrap() production
sites with _safe variants across 14 files, eliminating the player
crash-cascade class. Tokio async mutexes are unchanged.
Workstream B — graceful backend init:
- create_player_backend no longer panics when MPV/ExoPlayer fail to initialize;
it falls back to NullBackend and emits a backend-init-failed event so the UI
can show "playback unavailable" instead of the app crashing. Fatal DB-setup
panics are kept.
Workstream F — doc reconciliation:
- Rewrite software-architecture.md's inaccurate "thin UI / ~800 lines" claims to
reflect reality (~20.5k non-test frontend) and document the events+polling
hybrid plus the new locking/backend-init behavior.
