add the connections and sendToTest.cs for connecting with the game test

Assets/scripts/gamePlay_gameplay/InputManager.cs

@@ -11,10 +11,21 @@ public class InputManager : MonoBehaviour
     [Header("轨道判定显示TMP对象（请在Inspector中连接）")]
     public TextMeshProUGUI[] trackJudgeTexts = new TextMeshProUGUI[5];
 
+    [Header("按键指示文本（独立于判定文本，五个分别对应按键：D,F,Space,J,K）")]
+    public TextMeshProUGUI[] trackKeyTexts = new TextMeshProUGUI[5];
+
     [Header("是否显示判定文字")]
     public bool showJudgeText = true;
 
+    // 按键激活/非激活颜色
+    [Header("按键高亮颜色设置")]
+    [Tooltip("按键被按下时的颜色")]
+    public Color keyActiveColor = Color.yellow;
+    [Tooltip("按键未按下时的颜色（默认黑色）")]
+    public Color keyInactiveColor = Color.black;
+
     // 判定结果对应颜色
+    [Header("判定结果对应颜色")]
     public Color perfectColor = Color.yellow;
     public Color greatColor = Color.green;
     public Color goodColor = Color.cyan;
@@ -26,6 +37,15 @@ public class InputManager : MonoBehaviour
             Instance = this;
         else
             Destroy(gameObject);
+
+        // 初始化按键文本为非激活颜色
+        if (trackKeyTexts != null)
+        {
+            foreach (var t in trackKeyTexts)
+            {
+                if (t != null) t.color = keyInactiveColor;
+            }
+        }
     }
 
     private void Update()
@@ -35,14 +55,48 @@ public class InputManager : MonoBehaviour
             KeyCode key = KeyBindingManager.GetKeyForColor(color);
             if (key == KeyCode.None) continue;
 
+            int index = GetIndexForColor(color);
+
             if (Input.GetKeyDown(key))
             {
                 OnKeyPressed?.Invoke(key);
                 // 调用 JudgeManager 统一判断最早的音符
                 JudgeManager.Instance.JudgeEarliestNote(key);
+
+                // 按下时设置对应的按键文本颜色为激活色（如果已设置）
+                if (trackKeyTexts != null && index >= 0 && index < trackKeyTexts.Length)
+                {
+                    var txt = trackKeyTexts[index];
+                    if (txt != null)
+                        txt.color = keyActiveColor;
+                }
             }
             if (Input.GetKeyUp(key))
+            {
                 OnKeyReleased?.Invoke(key);
+
+                // 松开时恢复为非激活颜色
+                if (trackKeyTexts != null && index >= 0 && index < trackKeyTexts.Length)
+                {
+                    var txt = trackKeyTexts[index];
+                    if (txt != null)
+                        txt.color = keyInactiveColor;
+                }
+            }
+        }
+    }
+
+    private int GetIndexForColor(string color)
+    {
+        // 保持与 trackJudgeTexts 相同的索引映射
+        switch (color)
+        {
+            case "red": return 0;
+            case "green": return 1;
+            case "yellow": return 2;
+            case "purple": return 3;
+            case "blue": return 4;
+            default: return -1;
         }
     }