Upload to Qobuz now attaches Plex sidecar rows via the existing
add_plex_track_to_playlist helper (positions after the local block), and
the local entity is deleted only when the sidecar attach succeeds - a DB
failure keeps the playlist with an upload-incomplete toast instead of
silently dropping it.
Playlist manager: local playlists interleave into the active sort with the
same comparators as the Qobuz set (name/tracks real interleave; playcount
sorts locals as zero, custom as after-the-positioned-set, recent after the
API order - documented). u64-keyed mutators verified safe with local: ids.
Offline covers: cached_tracks.artwork_path turned out to have zero writers
in history, so CachedTrackInfo gained artwork_path + file_path and a
frontend-agnostic resolve_cover_path chain (index path, CMAF cover.jpg,
v1 sibling cover.jpg). The offline manager album rows and the local-
playlist cached rows now resolve covers through it.
cc
vicrodh
63e0e386ba