fix: Previous/Next走对woman步进 + 开场动画支持重复播放

- PreviousStep/NextStep: woman自由步进优先于Config路径
- UpdateTouchVisibility: 修正索引 i==step (之前错误地用step-1)
- PlayOpeningFlow: 每次调用前重置man/man2/摄像机状态，支持返回重来
- PageController: 移除InitializeFromGameManager调用，不再覆盖woman步进

Assets/Scripts/Core/StepManager.cs

@@ -124,14 +124,18 @@ public class StepManager : MonoBehaviour
 
     public void NextStep()
     {
-        if (_activeSteps == null) { WomanStepNext(); return; }
+        // Woman 自由步进优先
+        if (_womanObject != null && _womanPositions != null) { WomanStepNext(); return; }
+        if (_activeSteps == null) return;
         if (_currentStepIndex >= _activeSteps.Length - 1) { CompleteExperiment(); return; }
         GoToStep(_currentStepIndex + 1);
     }
 
     public void PreviousStep()
     {
-        if (_activeSteps == null) { WomanStepPrevious(); return; }
+        // Woman 自由步进优先
+        if (_womanObject != null && _womanPositions != null) { WomanStepPrevious(); return; }
+        if (_activeSteps == null) return;
         if (_currentStepIndex <= 0) return;
         GoToStep(_currentStepIndex - 1);
     }
@@ -221,7 +225,16 @@ public class StepManager : MonoBehaviour
     private void UpdateTouchVisibility(int step)
     {
         if (_touchPoints == null) return;
-        for (int i = 0; i < _touchPoints.Length; i++) _touchPoints[i].SetActive(i == step - 1);
+        for (int i = 0; i < _touchPoints.Length; i++)
+        {
+            bool show = (i == step);
+            _touchPoints[i].SetActive(show);
+            if (show)
+            {
+                var mr = _touchPoints[i].GetComponent<MeshRenderer>();
+                if (mr != null) mr.enabled = true;
+            }
+        }
     }