feat(slint): favorites tracks show album column + favorite heart

map_track now carries the album title (was dropped, blanked as ""), and
the Favorites tracks rows enable show-album + show-favorite so the album
column and the un-favorite heart render — matching the Tauri favorites
tracks row. Offline-cache download button stays off until that path is
wired.

cc

crates/qbz-slint/ui/favorites/FavoritesView.slint

@@ -342,6 +342,8 @@ export component FavoritesView inherits Rectangle {
                     track: track;
                     index: i;
                     show-artwork: true;
+                    show-album: true;
+                    show-favorite: true;
                     media-action(kind, id, action) => {
                         FavoritesActions.track-action(id, action);
                     }