feat: 优化离线重连机制，支持通过前端实现重新登录

* feat: 优化离线重连机制，增加前端登录错误提示与二维码刷新功能

- 增加全局掉线检测弹窗
- 增强登录错误解析，支持显示 serverErrorCode 和 message
- 优化二维码登录 UI，错误时显示详细原因并提供大按钮重新获取
- 核心层解耦，通过事件抛出 KickedOffLine 通知
- 支持前端点击刷新二维码接口

* feat: 新增看门狗汪汪汪

* cp napcat-shell-loader/launcher-win.bat

* refactor: 重构重启流程，移除旧的重启逻辑，新增基于 WebUI 的重启请求处理

* fix: 刷新二维码清楚错误信息

packages/napcat-webui-frontend/src/pages/dashboard/config/login.tsx

@@ -10,6 +10,7 @@ import PageLoading from '@/components/page_loading';
 
 import QQManager from '@/controllers/qq_manager';
 import ProcessManager from '@/controllers/process_manager';
+import { waitForBackendReady } from '@/utils/process_utils';
 
 const LoginConfigCard = () => {
   const [isRestarting, setIsRestarting] = useState(false);
@@ -60,11 +61,24 @@ const LoginConfigCard = () => {
     setIsRestarting(true);
     try {
       const result = await ProcessManager.restartProcess();
-      toast.success(result.message || '进程重启成功');
-      // 等待 5 秒后刷新页面
-      setTimeout(() => {
-        window.location.reload();
-      }, 5000);
+      toast.success(result.message || '进程重启请求已发送');
+
+      // 轮询探测后端是否恢复
+      const isReady = await waitForBackendReady(
+        30000, // 30秒超时
+        () => {
+          setIsRestarting(false);
+          toast.success('进程重启完成');
+        },
+        () => {
+          setIsRestarting(false);
+          toast.error('后端在 30 秒内未响应，请检查 NapCat 运行日志');
+        }
+      );
+
+      if (!isReady) {
+        setIsRestarting(false);
+      }
     } catch (error) {
       const msg = (error as Error).message;
       toast.error(`进程重启失败: ${msg}`);
@@ -114,7 +128,7 @@ const LoginConfigCard = () => {
           {isRestarting ? '正在重启进程...' : '重启进程'}
         </Button>
         <div className='mt-2 text-xs text-default-500'>
-          重启进程将关闭当前 Worker 进程，等待 3 秒后启动新进程，页面将在 5 秒后自动刷新
+          重启进程将关闭当前 Worker 进程，等待 3 秒后启动新进程
         </div>
       </div>
     </>

packages/napcat-webui-frontend/src/pages/qq_login.tsx

@@ -16,14 +16,39 @@ import type { QQItem } from '@/components/quick_login';
 import { ThemeSwitch } from '@/components/theme-switch';
 
 import QQManager from '@/controllers/qq_manager';
+import useDialog from '@/hooks/use-dialog';
 import PureLayout from '@/layouts/pure';
 import { motion } from 'motion/react';
 
+const parseLoginError = (errorStr: string) => {
+  if (errorStr.startsWith('登录失败: ')) {
+    const jsonPart = errorStr.substring('登录失败: '.length);
+
+    try {
+      const parsed = JSON.parse(jsonPart);
+
+      if (Array.isArray(parsed) && parsed[1]) {
+        const info = parsed[1];
+        const codeStr = info.serverErrorCode ? ` (错误码: ${info.serverErrorCode})` : '';
+
+        return `${info.message || errorStr}${codeStr}`;
+      }
+    } catch (e) {
+      // 忽略解析错误
+    }
+  }
+
+  return errorStr;
+};
+
 export default function QQLoginPage () {
   const navigate = useNavigate();
+  const dialog = useDialog();
   const [uinValue, setUinValue] = useState<string>('');
   const [isLoading, setIsLoading] = useState<boolean>(false);
   const [qrcode, setQrcode] = useState<string>('');
+  const [loginError, setLoginError] = useState<string>('');
+  const lastErrorRef = useRef<string>('');
   const [qqList, setQQList] = useState<(QQItem | LoginListItem)[]>([]);
   const [refresh, setRefresh] = useState<boolean>(false);
   const firstLoad = useRef<boolean>(true);
@@ -61,6 +86,20 @@ export default function QQLoginPage () {
         navigate('/', { replace: true });
       } else {
         setQrcode(data.qrcodeurl);
+        if (data.loginError && data.loginError !== lastErrorRef.current) {
+          lastErrorRef.current = data.loginError;
+          setLoginError(data.loginError);
+          const friendlyMsg = parseLoginError(data.loginError);
+
+          dialog.alert({
+            title: '登录失败',
+            content: friendlyMsg,
+            confirmText: '确定',
+          });
+        } else if (!data.loginError) {
+          lastErrorRef.current = '';
+          setLoginError('');
+        }
       }
     } catch (error) {
       const msg = (error as Error).message;
@@ -99,6 +138,18 @@ export default function QQLoginPage () {
     setUinValue(e.target.value);
   };
 
+  const onRefreshQRCode = async () => {
+    try {
+      lastErrorRef.current = '';
+      setLoginError('');
+      await QQManager.refreshQRCode();
+      toast.success('已发送刷新请求');
+    } catch (error) {
+      const msg = (error as Error).message;
+      toast.error(`刷新二维码失败: ${msg}`);
+    }
+  };
+
   useEffect(() => {
     const timer = setInterval(() => {
       onUpdateQrCode();
@@ -159,7 +210,11 @@ export default function QQLoginPage () {
                   />
                 </Tab>
                 <Tab key='qrcode' title='扫码登录'>
-                  <QrCodeLogin qrcode={qrcode} />
+                  <QrCodeLogin
+                    loginError={parseLoginError(loginError)}
+                    qrcode={qrcode}
+                    onRefresh={onRefreshQRCode}
+                  />
                 </Tab>
               </Tabs>
               <Button