Tag filter support

- Jellyfin: Uses `/items/filters` to get list of boolean tags. Notably, does not use this same filter for genres. Separate filter for song/album
- Navidrome: Uses `/api/tags`, which appears to be album-level as multiple independent selects. Same filter for song/album

src/renderer/api/utils.ts

@@ -48,7 +48,7 @@ export const hasFeature = (server: ServerListItem | null, feature: ServerFeature
         return false;
     }
 
-    return server.features[feature] ?? false;
+    return (server.features[feature]?.length || 0) > 0;
 };
 
 export type VersionInfo = ReadonlyArray<[string, Record<string, readonly number[]>]>;