Inlines the bodies of `create_pending_playlist`,
`get_pending_playlist_count`, `queue_scrobble`, `get_queued_scrobbles`,
`get_queued_scrobble_count`, and `cleanup_sent_scrobbles` from
crate::offline::commands::* directly into commands_v2/legacy_compat.rs.
The legacy bodies were uniform: lock state.store, unwrap optional store,
delegate to a method on the store struct. Inlined verbatim with the
String error type mapped to RuntimeError::Internal at each return path.
The store-side OfflineStore methods (data layer) are untouched.
Deletes the legacy #[tauri::command] definitions in offline/mod.rs.
Other functions in the offline::commands module remain (still called
from commands_v2/library.rs delegates, which are step 8 scope).
No frontend invoke changes required.
Step 6 of the legacy cleanup plan, group C (offline scrobble/playlist).
cc
vicrodh
515f73b259