Completes Slice 0. src-tauri now depends on the qbz-offline-cache crate; the
old src-tauri/src/offline_cache/ implementation files are deleted. What remains
in that module is a thin shim: a re-export of the crate plus the Tauri glue.
- offline_cache/mod.rs: pub use qbz_offline_cache::* + tauri_cache_sink (maps
CacheEvent -> the exact legacy offline:caching_*/offline:unlock_* app.emit
shapes, so the Svelte frontend is unchanged) + core_client (resolves the core
qbz_qobuz::QobuzClient from the CoreBridge for the download pipeline).
- Cache/redownload/migration commands: drop the legacy crate::api::QobuzClient
(state.client) + the CoreBridge double-plumb; pass one core client + an
app.emit-backed CacheEventSink. Unused `state: State<AppState>` params dropped.
- Playback + library cached-resolution call sites: pass &tauri_cache_sink(..)
to load_cmaf_bundle_with_ui_events instead of &app_handle.
- session_lifecycle: apply_persisted_limit now reads the persisted value here;
purge takes &library.db directly.
- migration: qobuz_client is the Option-wrapped core client (consistent with the
downloader); None mid-loop is recorded as a per-track failure.
Full src-tauri cargo check passes; behaviour-preserving for the Svelte frontend.
Backend extraction (ADR-006) done — next is Slice 1 (shared tier-walk in core).
cc
vicrodh
c8158bf419