bvandeusen
1f4a5e08bd
Extends the offline mutation queue with the two new write kinds the TrackActions menu produces — appending a track to a playlist, and flagging a track for quarantine. Replayer re-fires with idempotent server semantics; payload data classes mirror Flutter's wire shapes. Also adds PlaylistsApi.appendTracks since the replayer needs the Retrofit surface in the same change set. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>