diff --git a/Html/backboardManager.py b/Html/backboardManager.py
index 4b535db..e5b2ab9 100644
--- a/Html/backboardManager.py
+++ b/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):
diff --git a/code-server-like/templates/index.html b/code-server-like/templates/index.html
index a556124..5e7efe7 100644
--- a/code-server-like/templates/index.html
+++ b/code-server-like/templates/index.html
@@ -148,12 +148,14 @@
                     });
 
                     // 防抖处理非粘贴的编辑操作
-                    const content = changes.text;
+                    // 确保始终使用完整的编辑器内容而非仅变更部分
+                    const fullContent = editor.getValue();
                     debounceSendToServer({
                         type: 'fileEdit',
                         filePath: filePath,
-                        content: content,
+                        content: fullContent,
                         config: code_like_config,
+                        timestamp: new Date().getTime() // 添加时间戳以便追踪
                     }, 5000
                 );
                 // saveFile