Two follow-ups to the LB Sync tab work:
1. **Track counts all showed 0.** The
``/api/discover/listenbrainz/*`` endpoints assemble a JSPF-shaped
payload but drop the cached ``track_count`` field from the
underlying ``listenbrainz_playlists`` row — the JSON the frontend
sees only carries ``title`` / ``creator`` / ``annotation`` / an
empty ``track`` array. The Discover-page renderer worked around
it by hard-coding a fallback of 50; the Sync-page renderer had
no such fallback, so every card displayed "0 tracks". Backend
now includes ``track_count`` directly in each playlist payload
(it's already in the cached row) so any frontend can render an
accurate count without resorting to a default. JS still falls
back to ``annotation.track_count`` and then ``track.length`` for
older callers.
2. **LB playlists never landed in Mirrored Playlists.** The
existing ``/api/listenbrainz/sync/start/<mbid>`` endpoint runs
the converted Spotify tracks through ``_run_sync_task`` — i.e.
it pushes them to the user's media server (Plex / Jellyfin /
Navidrome / SoulSync) as a server-side playlist. It does NOT
call ``database.mirror_playlist``. So no ``mirrored_playlists``
row gets created and the playlist can't be picked up by the
Auto-Sync scheduler, can't show up under the Mirrored tab,
doesn't participate in pipeline automations — the whole point
of the Sync-tab unification.
Tidal works because Tidal mirrors on tab load with raw tracks
then enriches via discovery. LB tracks only have provider IDs
*after* discovery, so the equivalent moment for LB is "discovery
complete". Added ``_mirrorListenBrainzAfterDiscovery(mbid)``
that pulls the matched ``spotify_data`` out of
``discovery_results`` and posts to ``/api/mirror-playlist`` via
the existing ``mirrorPlaylist`` helper. Hooked into both the
WebSocket and HTTP-poll completion handlers of
``startListenBrainzDiscoveryPolling``. UPSERT-keyed on (source,
source_playlist_id, profile_id), so re-running discovery is a
safe no-op refresh.
Result: any LB playlist the user discovers (from either the
Discover page or the new Sync tab) now lands in
``mirrored_playlists`` with ``source='listenbrainz'`` + matched
tracks carrying canonical ``extra_data`` JSON, ready for the
Auto-Sync refresh + sync pipeline wired up in Phase 1a + 1b.
f521be7720
