HomeViewModel.playPlaylist (the Home play-button overlay path) and
PlaylistDetailViewModel.play (the detail-screen path) both converted
PlaylistTrackRef -> TrackRef before player.setQueue, but only the
detail-screen path filtered out unplayable rows (missing trackId or
empty streamUrl). Home's path passed them through; Media3 then
silently no-op'd on setUri("") and the queue appeared loaded but
nothing started.
Operator reported "Songs-like playlists queue music that never
plays" via the Home play-overlay 2026-06-01. The same conversion in
two places with different rules is exactly the foot-gun the §1-§3
DRY pass was supposed to head off; this commit adds it as a follow-up
since the playlist-play helper wasn't covered by that sweep.
Extracts `List<PlaylistTrackRef>.toPlayableTrackRefs()` in
playlists/data/PlaylistsRepository.kt. Filters (isAvailable &&
streamUrl non-empty) THEN maps to TrackRef, in one pass. Both call
sites now use it.
The remaining private `toTrackRef()` in PlaylistDetailScreen is kept
for the per-row TrackActionsButton wiring - the actions menu only
needs id+display fields and doesn't queue anything itself.
bvandeusen
487400fab6