fix(web): hide Play next / Add to queue on PlayerBar's track menu

Those actions don't have meaningful semantics for the track you're
already listening to. New TrackMenu prop hideQueueActions gates the
pair; PlayerBar passes it true. Other mount sites (track rows in
lists) keep the full 8-entry menu.

web/src/lib/components/PlayerBar.svelte

@@ -71,7 +71,7 @@
         </a>
       </div>
       <LikeButton entityType="track" entityId={current.id} />
-      <TrackMenu track={current} direction="up" />
+      <TrackMenu track={current} direction="up" hideQueueActions />
     </div>
 
     <!-- Center: seek row + transport row -->