Web half of Stage 3. System-playlist tile play now:
- calls the new GET /api/playlists/system/{variant}/shuffle endpoint
(rotation-aware order from the server) instead of getPlaylist;
plays the returned order AS-IS — no client Fisher-Yates, since
the server already ordered it. Supersedes #413's client shuffle
for system playlists specifically; user playlists keep getPlaylist
+ stored order.
- tags the queue with the system variant. The player store carries
_queueSource; the events dispatcher includes `source` on
play_started so the server advances that playlist's rotation.
User playlists are unchanged (getPlaylist, plain playQueue, no
source). Tests updated: For-You play hits systemShuffle (not
getPlaylist/refresh) and passes source:for_you; user play uses
getPlaylist + plain playQueue with no source.
Flutter half is blocked — the Flutter client has no play-event
reporting at all (no /api/events POST, no scrobble), so there's no
play_started to attach `source` to. Surfacing that as a separate
decision rather than silently scope-exploding #415.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen
179519689b