m1, add file scan, library, browse, play, seek

src/types/library.ts

@@ -5,11 +5,13 @@ export type TrackSourceType = 'local' | 'subsonic' | 'jellyfin';
 
 export interface DbTrack {
   id: number;
-  path: string;
+  path: string; // SAF document content:// URI for local tracks
+  folder_id: number;
   title: string;
   artist: string;
   album: string;
   album_artist: string | null;
+  album_identity_key: string;
   duration: number;
   track_number: number | null;
   disc_number: number | null;
@@ -23,7 +25,21 @@ export interface DbTrack {
   channels: number | null;
   codec: string | null;
   source_type: TrackSourceType;
+  file_name: string;
+  size: number | null;
+  mtime: number;
   added_at: number;
+  modified_at: number;
+}
+
+export interface LibraryFolder {
+  id: number;
+  tree_uri: string;
+  display_name: string;
+  added_at: number;
+  last_scanned_at: number | null;
+  /** Computed against persisted URI permissions at load time — not stored. */
+  available: boolean;
 }
 
 export interface Album {