fix: widen note lanes and clear warnings

Assets/Script/SongController.cs

@@ -13,6 +13,11 @@ public class SongController : MonoBehaviour
     [SerializeField] private GameEvent   onLevelComplete;
     [SerializeField] private TMP_Text    countdownText;
 
+    private const float LaneSpacing = 0.42f;
+    private const float LayerSpacing = 0.38f;
+    private const float HorizontalCenter = 1.5f;
+    private const float VerticalCenter = 1f;
+
     private AudioManager _audio;
 
     private static string CacheRoot =>
@@ -20,7 +25,7 @@ public class SongController : MonoBehaviour
 
     private void Start()
     {
-        _audio = FindObjectOfType<AudioManager>();
+        _audio = FindFirstObjectByType<AudioManager>();
         StartCoroutine(LoadAndPlay());
     }
 
@@ -68,7 +73,7 @@ public class SongController : MonoBehaviour
             Debug.LogError("[SongController] Map parse failed");
             yield break;
         }
-        map.target.Sort((a, b) => a.time.CompareTo(b.time));
+        map.target.Sort(CompareNotes);
 
         yield return StartCoroutine(Countdown());
 
@@ -109,8 +114,8 @@ public class SongController : MonoBehaviour
 
     private void SpawnNote(NoteData note)
     {
-        float x = -0.375f + note.position * 0.25f;
-        float y = -0.333f + note.lineLayer * 0.333f;
+        float x = MapLaneX(note.position);
+        float y = MapLayerY(note.lineLayer);
 
         // 스폰 시점의 실제 남은 시간으로 역산 → 동시 노트가 프레임 차이 나도 같은 타이밍에 도착
         float remaining = note.time - _audio.CurrentTime;
@@ -129,6 +134,31 @@ public class SongController : MonoBehaviour
         VR_BeatManager.instance.Spawn(cubePrefab, info);
     }
 
+    private static int CompareNotes(NoteData a, NoteData b)
+    {
+        int timeCompare = a.time.CompareTo(b.time);
+        if (timeCompare != 0)
+            return timeCompare;
+
+        int positionCompare = a.position.CompareTo(b.position);
+        if (positionCompare != 0)
+            return positionCompare;
+
+        return a.lineLayer.CompareTo(b.lineLayer);
+    }
+
+    private static float MapLaneX(int position)
+    {
+        int lane = Mathf.Clamp(position, 0, 3);
+        return (lane - HorizontalCenter) * LaneSpacing;
+    }
+
+    private static float MapLayerY(int lineLayer)
+    {
+        int layer = Mathf.Clamp(lineLayer, 0, 2);
+        return (layer - VerticalCenter) * LayerSpacing;
+    }
+
     // Beat Saber cutDirection → VRBeats Direction
     // BS: 0=Up 1=Down 2=Left 3=Right 4=UpperLeft 5=UpperRight 6=LowerLeft 7=LowerRight 8=Any
     private static readonly Direction[] CutDirMap =