Add process restart feature via WebUI

Introduces backend and frontend support for restarting the worker process from the WebUI. Adds API endpoint, controller, and UI button for process management. Refactors napcat-shell to support master/worker process lifecycle and restart logic.

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

@@ -1,6 +1,7 @@
 import { Input } from '@heroui/input';
+import { Button } from '@heroui/button';
 import { useRequest } from 'ahooks';
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import { Controller, useForm } from 'react-hook-form';
 import toast from 'react-hot-toast';
 
@@ -8,8 +9,10 @@ import SaveButtons from '@/components/button/save_buttons';
 import PageLoading from '@/components/page_loading';
 
 import QQManager from '@/controllers/qq_manager';
+import ProcessManager from '@/controllers/process_manager';
 
 const LoginConfigCard = () => {
+  const [isRestarting, setIsRestarting] = useState(false);
   const {
     data: quickLoginData,
     loading: quickLoginLoading,
@@ -53,6 +56,22 @@ const LoginConfigCard = () => {
     }
   };
 
+  const onRestartProcess = async () => {
+    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);
+    } catch (error) {
+      const msg = (error as Error).message;
+      toast.error(`进程重启失败: ${msg}`);
+      setIsRestarting(false);
+    }
+  };
+
   useEffect(() => {
     reset();
   }, [quickLoginData]);
@@ -82,6 +101,22 @@ const LoginConfigCard = () => {
         isSubmitting={isSubmitting || quickLoginLoading}
         refresh={onRefresh}
       />
+      <div className='flex-shrink-0 w-full mt-6 pt-6 border-t border-divider'>
+        <div className='mb-3 text-sm text-default-600'>进程管理</div>
+        <Button
+          color='warning'
+          variant='flat'
+          onPress={onRestartProcess}
+          isLoading={isRestarting}
+          isDisabled={isRestarting}
+          fullWidth
+        >
+          {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
+        </div>
+      </div>
     </>
   );
 };