feat: ping两步点击+蓝色描边+StepManager步骤追踪

PingClickHandler:
- 蓝色圆环闪烁描边
- 第一点击: 停止闪烁显示模型
- 第二点击: 显示chanrao隐藏自己激活下个ping
- UndoSecondClick/UndoShow 支持撤销

StepManager:
- 新增PingStepPrevious/PingStepNext/RecordPingStep
- PreviousStep/NextStep ping步优先于woman步
- InitPingSteps初始化ping/chanrao引用

Assets/Scripts/Interaction/PingClickHandler.cs

@@ -1,20 +1,26 @@
 using UnityEngine;
 
 /// <summary>
-/// 挂在每个 ping 对象上。带蓝色闪烁描边，点击后显示对应 chanrao 并隐藏自己。
-/// 从 ping.004 开始作为第一个（reverse order）。
+/// 挂在每个 ping 对象上。蓝色圆环闪烁描边，两步点击：
+/// 1. 第一次点击 → 停止闪烁，显示 ping 模型
+/// 2. 第二次点击 → 显示对应 chanrao，隐藏自己，激活下个 ping
+/// 点击通知 StepManager 记录步骤。
 /// </summary>
 public class PingClickHandler : MonoBehaviour
 {
     public GameObject chanraoObject;
     public GameObject nextPing;
+    public int pingIndex; // ping.004=0, ping.003=1, ping.002=2, ping.001=3
 
     private MeshRenderer _meshRenderer;
+    private LineRenderer _outlineRenderer;
+    private bool _clickedOnce;
 
     void Start()
     {
         _meshRenderer = GetComponent<MeshRenderer>();
         if (_meshRenderer == null) _meshRenderer = GetComponentInChildren<MeshRenderer>();
+        CreateBlueOutline();
         StartCoroutine(BlinkOutline());
     }
 
@@ -22,39 +28,102 @@ public class PingClickHandler : MonoBehaviour
     {
         _meshRenderer = GetComponent<MeshRenderer>();
         if (_meshRenderer == null) _meshRenderer = GetComponentInChildren<MeshRenderer>();
-        if (_meshRenderer != null) _meshRenderer.enabled = true;
+        if (_meshRenderer != null) _meshRenderer.enabled = false; // 初始隐藏模型，只留描边
+        CreateBlueOutline();
+        _clickedOnce = false;
         StopAllCoroutines();
         StartCoroutine(BlinkOutline());
     }
 
+    void CreateBlueOutline()
+    {
+        if (_outlineRenderer != null) return;
+        var ringGo = new GameObject("BlueRing");
+        ringGo.transform.SetParent(transform, false);
+        ringGo.transform.localPosition = Vector3.zero;
+        ringGo.transform.localRotation = Quaternion.Euler(90f, 0, 0);
+
+        _outlineRenderer = ringGo.AddComponent<LineRenderer>();
+        _outlineRenderer.useWorldSpace = false;
+        _outlineRenderer.loop = true;
+        _outlineRenderer.startWidth = 0.04f;
+        _outlineRenderer.endWidth = 0.04f;
+        _outlineRenderer.material = new Material(Shader.Find("Unlit/Color"));
+        _outlineRenderer.material.color = new Color(0.2f, 0.5f, 1f);
+        _outlineRenderer.startColor = new Color(0.2f, 0.5f, 1f);
+        _outlineRenderer.endColor = new Color(0.2f, 0.5f, 1f);
+
+        float r = 0.25f;
+        int segs = 32;
+        _outlineRenderer.positionCount = segs;
+        for (int i = 0; i < segs; i++)
+        {
+            float a = i * 2f * Mathf.PI / segs;
+            _outlineRenderer.SetPosition(i, new Vector3(Mathf.Cos(a) * r, Mathf.Sin(a) * r, 0));
+        }
+    }
+
     System.Collections.IEnumerator BlinkOutline()
     {
         while (true)
         {
-            if (_meshRenderer != null)
-                _meshRenderer.enabled = !_meshRenderer.enabled;
+            if (_outlineRenderer != null)
+                _outlineRenderer.enabled = !_outlineRenderer.enabled;
             yield return new WaitForSeconds(0.4f);
         }
     }
 
     void OnMouseDown()
     {
-        Debug.Log($"[PingClick] {name} 被点击");
-
-        if (chanraoObject != null)
+        if (!_clickedOnce)
         {
-            chanraoObject.SetActive(true);
-            Debug.Log($"[PingClick] {chanraoObject.name} 已显示");
+            // 第一次点击：停止闪烁，显示模型
+            _clickedOnce = true;
+            StopAllCoroutines();
+            if (_meshRenderer != null) _meshRenderer.enabled = true;
+            if (_outlineRenderer != null) _outlineRenderer.enabled = true;
+            Debug.Log($"[PingClick] {name} 第一次点击，模型显示");
+        }
+        else
+        {
+            // 第二次点击：显示 chanrao，隐藏自己，激活下个 ping
+            if (chanraoObject != null)
+            {
+                chanraoObject.SetActive(true);
+                Debug.Log($"[PingClick] {chanraoObject.name} 已显示");
+            }
+
+            StopAllCoroutines();
+            if (_meshRenderer != null) _meshRenderer.enabled = false;
+            if (_outlineRenderer != null) _outlineRenderer.enabled = false;
+            gameObject.SetActive(false);
+
+            if (nextPing != null)
+            {
+                nextPing.SetActive(true);
+                Debug.Log($"[PingClick] {name} → {nextPing.name} 已激活");
+            }
         }
 
-        StopAllCoroutines();
+        // 通知 StepManager
+        var sm = FindObjectOfType<StepManager>();
+        if (sm != null) sm.RecordPingStep(pingIndex, _clickedOnce);
+    }
+
+    /// <summary>上一步撤销：恢复到first-click状态</summary>
+    public void UndoSecondClick()
+    {
+        if (!_clickedOnce) return;
+        _clickedOnce = false;
+        gameObject.SetActive(true);
         if (_meshRenderer != null) _meshRenderer.enabled = false;
-        gameObject.SetActive(false);
+        StopAllCoroutines();
+        StartCoroutine(BlinkOutline());
+    }
 
-        if (nextPing != null)
-        {
-            nextPing.SetActive(true);
-            Debug.Log($"[PingClick] {name} → {nextPing.name} 已激活");
-        }
+    /// <summary>上一步撤销：隐藏自己，恢复前一个ping</summary>
+    public void UndoShow()
+    {
+        gameObject.SetActive(false);
     }
 }