剧情+对话完善

Assets/Scripts/NewStorySystem/Tree/StoryBlockView.cs

@@ -20,6 +20,10 @@ namespace Ichni.Story.UI
         public RectTransform outPort;
         public Button button;
 
+        // 运行时实际承载点击事件的 Button。TextBlock 会在切换状态视觉时替换其背景，
+        // 因此不能只依赖 Prefab 初始序列化的 button 引用。
+        private Button _boundInteractionButton;
+
         // 关联的定义，供子类读取类型专属字段
         protected StoryBlockDefinition definition;
 
@@ -48,8 +52,7 @@ namespace Ichni.Story.UI
             // 都可保留各自的宽高；StoryTreeController 会据此计算 Content 边界和连接线端口。
             blockRect.anchoredPosition = position;
 
-            if (button != null)
-                button.onClick.AddListener(HandleClick);
+            BindInteractionButton(button);
 
             ApplyState(state);
         }
@@ -62,8 +65,43 @@ namespace Ichni.Story.UI
         {
             state = newState;
 
-            if (button != null)
-                button.interactable = state != StoryBlockState.Locked && state != StoryBlockState.Forbidden;
+            RefreshButtonInteractable();
+        }
+
+        /// <summary>
+        /// 绑定当前 Block 的交互 Button。
+        /// TextBlock 更换状态背景时会销毁旧背景并生成新的 Button；必须先解绑旧对象、
+        /// 再绑定新对象，才能避免点击监听丢失或因重复绑定而触发多次。
+        /// </summary>
+        protected void BindInteractionButton(Button newButton)
+        {
+            if (_boundInteractionButton == newButton)
+            {
+                RefreshButtonInteractable();
+                return;
+            }
+
+            if (_boundInteractionButton != null)
+                _boundInteractionButton.onClick.RemoveListener(HandleClick);
+
+            _boundInteractionButton = newButton;
+            button = newButton;
+
+            if (_boundInteractionButton != null)
+                _boundInteractionButton.onClick.AddListener(HandleClick);
+
+            RefreshButtonInteractable();
+        }
+
+        /// <summary>
+        /// 依据剧情状态刷新当前交互 Button。Completed 仍允许回顾，只有 Locked 与
+        /// Forbidden 状态禁止点击。
+        /// </summary>
+        protected void RefreshButtonInteractable()
+        {
+            if (_boundInteractionButton != null)
+                _boundInteractionButton.interactable =
+                    state != StoryBlockState.Locked && state != StoryBlockState.Forbidden;
         }
 
         private void HandleClick()