debug: add logging to diagnose lyrics sync issue in ExpandedPlayer

src/lib/components/ExpandedPlayer.svelte

@@ -93,7 +93,9 @@
 
   // Ensure lyrics updates run when ExpandedPlayer is open with synced lyrics
   $effect(() => {
+    console.log('[ExpandedPlayer] Effect check:', { isOpen, isPlaying, lyricsSynced, lyricsActiveIndex, hasLyrics: lyricsLines.length > 0 });
     if (isOpen && isPlaying && lyricsSynced) {
+      console.log('[ExpandedPlayer] Starting lyrics updates');
       startActiveLineUpdates();
     }
   });

src/lib/components/lyrics/LyricsLines.svelte

@@ -33,6 +33,11 @@
   let prevActiveIndex = -1;
   let hasInitialSync = false;
 
+  // Debug logging
+  $effect(() => {
+    console.log('[LyricsLines] Props:', { linesCount: lines.length, activeIndex, activeProgress: activeProgress.toFixed(2), isSynced, immersive });
+  });
+
   // Calculate opacity based on distance from active line
   function getLineOpacity(index: number, active: number): number {
     if (!dimInactive || active < 0) return 1;