Likes and dislikes without a network are kept in a pending_reactions
table (last reaction per track wins) and sent when the connection
returns, instead of being rolled back. Downloaded track DTOs pick up the
new reaction so the offline wave and Downloads reflect it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Downloads queue (2 parallel, Wi-Fi only by default) stores files under
the app's document directory and track metadata in SQLite; Collection
gets a Downloads tab, album and player screens get download buttons.
- Player plays downloaded files and local covers; My Wave falls back to
a shuffle of downloaded tracks when the server is unreachable.
- Playback events that fail on the network are kept in SQLite and sent
when the connection returns.
- AuthSession can open offline with the cached user and fetches an
access token before the first request once online.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>