fix: resolve multiple UI issues in player, playlist, lyrics, and queue

- Playlist: add console.error in catch block so load failures are visible
- Player: add progress bar with requestAnimationFrame and time display
- Player: extract toggleQueue function with debug logging for queue panel
- WebSocket: fetch queue on stateChange when not included in event payload
- Lyrics: use CSS transform scrolling and reduce sync to 500ms to fix flicker

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/src/composables/useWebSocket.ts

@@ -29,7 +29,12 @@ export function useWebSocket() {
           break;
         case 'stateChange':
           store.updateBotStatus(data.botId, data.status);
-          if (data.queue) store.setQueue(data.queue);
+          if (data.queue) {
+            store.setQueue(data.queue);
+          } else {
+            // Queue not included in event; refresh it
+            store.fetchQueue();
+          }
           break;
         case 'botConnected':
           store.updateBotStatus(data.botId, data.status);