feat(musik): tambahkan extensive debug logging untuk tracking seek issue

- Tambah key stabil pada audio element untuk mencegah remount
- Log di seekTo: before/after currentTime
- Log di onTimeUpdate: currentTime, rounded, isSeeking
- Log di onChangeEnd slider: value, seekTime
- Log di useEffect song change: currentSong, currentSongIndex
- Log di skipBack/skipForward: index perubahan lagu

Purpose: Track urutan eksekusi dan identifikasi race condition atau re-render yang tidak diinginkan

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/app/darmasaba/(pages)/musik/lib/seek.ts

@@ -3,16 +3,23 @@ export function seekTo(
   time: number,
   setCurrentTime?: (v: number) => void
 ) {
-  if (!audioRef.current) return;
+  if (!audioRef.current) {
+    console.error('[seekTo] Audio element tidak ada!');
+    return;
+  }
+  
+  console.log('[seekTo] Before seek - currentTime:', audioRef.current.currentTime, 'Target:', time);
   
   // Set waktu audio
   audioRef.current.currentTime = time;
   
+  console.log('[seekTo] After seek - currentTime:', audioRef.current.currentTime);
+  
   // Update state jika provided
   if (setCurrentTime) {
     setCurrentTime(Math.round(time));
   }
   
-  // Debug log (bisa dihapus nanti)
+  // Debug log
   console.log('[seekTo] Seek to:', time, 'seconds');
 }