repaired the motherfucking hold note problem which troubled us longer than 2 months

added some UI

Assets/scripts/gamePlay_gameplay/TrackKeyManager.cs

@@ -20,7 +20,7 @@ public class TrackKeyManager : MonoBehaviour
     }
 
     /// <summary>
-    /// 当音符进入判定区域时，添加按键映射
+    /// 当音符进入判定区域时，添加按键映射
     /// </summary>
     public void RegisterKey(int trackIndex, KeyCode key)
     {
@@ -31,7 +31,7 @@ public class TrackKeyManager : MonoBehaviour
     }
 
     /// <summary>
-    /// 当音符离开判定区域时，移除按键映射
+    /// 当音符离开判定区域时，移除按键映射
     /// </summary>
     public void UnregisterKey(int trackIndex, KeyCode key)
     {
@@ -45,7 +45,7 @@ public class TrackKeyManager : MonoBehaviour
     }
 
     /// <summary>
-    /// 获取轨道当前的按键（队列头）
+    /// 获取轨道当前的按键（队列头）
     /// </summary>
     public KeyCode GetCurrentKey(int trackIndex)
     {
@@ -53,6 +53,6 @@ public class TrackKeyManager : MonoBehaviour
         {
             return trackKeyMappings[trackIndex].Peek();
         }
-        return KeyCode.None; // 无按键
+        return KeyCode.None; // 无按键
     }
 }