feat(ui): bulk entity ratings, Random Albums multi-select, album New badge (#446)

Add star rating rows to multi-artist and multi-album context menus so the
selection shares one rating control (mixed ratings show empty until set;
keyboard navigation supported). Pass selectedAlbums into AlbumCard on Random
Albums so multi-select context menu works. Add i18n aria labels for bulk
rating controls. Move the New album badge to the top-right of the cover and
stack it with the offline badge to avoid overlap.

src/components/AlbumCard.tsx

@@ -83,14 +83,18 @@ function AlbumCard({ album, selected, selectionMode, onToggleSelect, showRating
             </svg>
           </div>
         )}
-        {isOffline && !selectionMode && (
-          <div className="album-card-offline-badge" aria-label="Offline available">
-            <HardDriveDownload size={12} />
-          </div>
-        )}
-        {isNewAlbum && (
-          <div className="album-card-new-badge" aria-label={t('common.new', 'New')}>
-            {t('common.new', 'New')}
+        {(isNewAlbum || (isOffline && !selectionMode)) && (
+          <div className="album-card-cover-badges-tr">
+            {isNewAlbum && (
+              <div className="album-card-new-badge" aria-label={t('common.new', 'New')}>
+                {t('common.new', 'New')}
+              </div>
+            )}
+            {isOffline && !selectionMode && (
+              <div className="album-card-offline-badge" aria-label="Offline available">
+                <HardDriveDownload size={12} />
+              </div>
+            )}
           </div>
         )}
         {selectionMode && (