Adds streamable field throughout the stack to detect tracks that have
been removed from Qobuz but still appear in playlists/favorites:
Backend (Rust):
- QueueTrack: add streamable field with default true
- PersistedQueueTrack: add streamable for session persistence
- radio.rs: log warning when non-streamable track is encountered
Frontend:
- BackendQueueTrack: add streamable? field
- QobuzTrack, Track, PlaylistTrack types: add streamable
- qobuzAdapters.ts: include streamable in track conversions
- trackActions.ts: all queue builders now include streamable
- +page.svelte: debug logging includes streamable field
This prepares the infrastructure for graying out unavailable tracks
in the UI (to be implemented when we can reproduce the issue).
Refs: User report about "Failed to fetch audio" for removed tracks
vicrodh
10788f877f