Fix for offline mode

src-tauri/src/storage/mod.rs

@@ -201,6 +201,7 @@ mod tests {
             "thumbnails",
             "playlists",
             "playlist_items",
+            "genres",
         ];
 
         for table in expected_tables {

src-tauri/src/storage/schema.rs

@@ -23,6 +23,7 @@ pub const MIGRATIONS: &[(&str, &str)] = &[
     ("016_autoplay_max_episodes", MIGRATION_016),
     ("017_downloads_resume_url", MIGRATION_017),
     ("018_items_is_folder", MIGRATION_018),
+    ("019_genres_cache", MIGRATION_019),
 ];
 
 /// Initial schema migration
@@ -693,3 +694,23 @@ ALTER TABLE items ADD COLUMN is_folder INTEGER DEFAULT 0;
 -- Force re-fetch of all cached items so is_folder is populated from the server.
 UPDATE items SET synced_at = NULL;
 "#;
+
+/// Migration to cache the full server genre catalog. Previously genres were
+/// derived on the fly from cached albums, which meant offline (and the hybrid
+/// cache-first race) only ever saw genres for the handful of locally-cached
+/// albums — collapsing the variety on the music/TV/movie landing pages. This
+/// table stores the complete genre list per library so offline has the real
+/// catalog and cache-first routing returns the right thing.
+const MIGRATION_019: &str = r#"
+CREATE TABLE IF NOT EXISTS genres (
+    id TEXT NOT NULL,
+    server_id TEXT NOT NULL,
+    library_id TEXT,
+    name TEXT NOT NULL,
+    album_count INTEGER,
+    synced_at TEXT DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (server_id, library_id, name)
+);
+
+CREATE INDEX IF NOT EXISTS idx_genres_scope ON genres(server_id, library_id);
+"#;