Favorites are not synced when songs are renamed, moved, or deleted

[alhaymex]

Description

Favorites are stored as a set of absolute file paths in favorites.songs. When a song's path changes, the favorite entry becomes orphaned and the song no longer appears in the Favorites screen.

Affected operations

• Rename (Ctrl + e) — changes the file name and therefore the path.
• Move (planned Ctrl + x / Ctrl + v) — changes the parent directory.
• Delete (Ctrl + d) — removes the file entirely.

Expected behavior

• When a song is renamed or moved, the old path in favorites.songs should be replaced with the new path.
• When a song is deleted, its path should be removed from favorites.songs if present.
• After any of these operations, favorites.save() should be called to persist the change.

Note

Favorites should be cleaned and relinked on library rescan