refactor: 优化错误提示信息

- 统一错误提示为用户友好的消息
- 调整代码风格保持一致性

src/utils/messageHandler.ts

@@ -307,8 +307,8 @@ async function handleUserMessageWithBackend(
 
         onSegmentUpdate: (segments) => {
           // 过滤掉包含 [调用工具:xxx] 的段落
-          const filteredSegments = segments.filter(seg => {
-            if (seg.type === 'text' && typeof seg.content === 'string') {
+          const filteredSegments = segments.filter((seg) => {
+            if (seg.type === "text" && typeof seg.content === "string") {
               return !/\[调用工具:.+?\]/.test(seg.content);
             }
             return true;
@@ -427,7 +427,7 @@ async function handleUserMessageWithBackend(
           });
           panel.webview.postMessage({
             command: "receiveMessage",
-            text: `❌ 错误: ${message}`,
+            text: `❌ 服务繁忙，请稍后重试`,
           });
           // 恢复输入状态
           panel.webview.postMessage({
@@ -848,10 +848,10 @@ async function handleFileOperation(
     const errorMsg = error instanceof Error ? error.message : "操作失败";
     panel.webview.postMessage({
       command: "receiveMessage",
-      text: `❌ ${errorMsg}`,
+      text: `❌ 服务繁忙，请稍后重试`,
     });
     vscode.window.showErrorMessage(errorMsg);
-    await historyManager.addAiMessage(`❌ ${errorMsg}`);
+    await historyManager.addAiMessage(`❌ 服务繁忙，请稍后重试`);
   }
 }