fix

Html/backboardManager.py

@@ -43,13 +43,22 @@ class Backboard:
         f"- File tree: {self.file_tree}{endl}")
         # f"- Activated file content (current editing 10 lines): {endl}"
     def add_history(self, realtime_action):
-        if(realtime_action['type']=='config'):return
-        if len(self.history)!=0:
-            if (self.history[-1]['type']=='fileEdit'):
-                if(self.history[-1]['filePath'] == realtime_action['filePath']):
+        # 检查必要的键是否存在，避免KeyError
+        if realtime_action.get('type') == 'config':
+            return
+        if len(self.history) > 0 and realtime_action.get('type') == 'fileEdit':
+            # 安全地获取filePath，并进行比较
+            current_file_path = realtime_action.get('filePath')
+            # 检查最近的历史记录是否包含filePath
+            if current_file_path and self.history[-1].get('filePath') == current_file_path:
+                # 安全地更新content，只有当content存在时才更新
+                if 'content' in realtime_action:
                     self.history[-1]['content'] = realtime_action['content']
-                    return
+                return
         self.history.append(realtime_action)
+        # 限制历史记录的数量
+        if len(self.history) > 500:  # 假设最多保留500条记录
+            self.history.pop(0)  # 移除最旧的记录
 
 
     def get_deltatime_mmss(self, start_time, end_time):