fix：问候语逻辑

src/pages/Chat/Chat.tsx

@@ -32,7 +32,7 @@ export const Chat: React.FC = () => {
   const currentIdRef = useRef<string | undefined>(id)
   const lastSentQuestionRef = useRef<string>('')
   const abortControllerRef = useRef<AbortController | null>(null)
-  const [currentToolName, setCurrentToolName] = useState<string | undefined>(undefined)
+  const [currentToolName, setCurrentToolName] = useState<string>('通用模式')
 
   /** 处理正常stream的数据 */
   const handleStreamMesageData = (msg: any, question: string) => {
@@ -330,8 +330,10 @@ export const Chat: React.FC = () => {
 
   // 根据 currentToolId 获取对应的 toolName
   useEffect(() => {
+    if (!currentToolId)
+      return
+
     const getToolNameFromToolId = async () => {
-      if (currentToolId) {
       try {
         // 使用统一的方法获取 userRoles（先同步路由到 localStorage，然后读取）
         const userRoles = getUserRolesForApi()
@@ -347,11 +349,6 @@ export const Chat: React.FC = () => {
         console.error('获取工具列表失败:', error)
       }
     }
-      else {
-        // 通用模式
-        setCurrentToolName('通用模式')
-      }
-    }
     getToolNameFromToolId()
   }, [currentToolId])