When switching from AVPlayer to MPV backend, Now Playing controls (play/pause/seek) were disabled because AVPlayer maintained control of the remote command center and audio session. This fix ensures MPV can properly reclaim control.
Key changes:
- Clear AVPlayer's current item when switching to MPV to release media control
- Clear Now Playing info and set playback state to stopped before MPV takes over
- Reset remote command center by removing all targets (including AVPlayer's internal handlers) and re-adding custom handlers
- Force audio session deactivation/reactivation with .notifyOthersOnDeactivation
- Add forceReactivate parameter to setupAudioSessionForNowPlaying() for backend switches
- Ensure stream loading continues after Now Playing setup (don't return early)
The fix properly handles the transition by:
1. Clearing AVPlayer's media session completely
2. Scheduling async Now Playing setup without blocking stream loading
3. Resetting remote command handlers to reclaim control from AVPlayer
4. Re-activating audio session to establish MPV as the active player