修复初始化设置通知，shell 映射，邮箱通知错误提示

back/loaders/deps.ts

@@ -8,8 +8,8 @@ async function linkToNodeModule(src: string, dst?: string) {
   const target = path.join(config.rootPath, 'node_modules', dst || src);
   const source = path.join(config.rootPath, src);
 
-  const _exist = await fileExist(target);
-  if (!_exist) {
+  const stats = await fs.lstat(target);
+  if (!stats) {
     await fs.symlink(source, target, 'dir');
   }
 }

back/loaders/express.ts

@@ -105,7 +105,6 @@ export default ({ app }: { app: Application }) => {
     }
     const userService = Container.get(UserService);
     const authInfo = await userService.getUserInfo();
-    const envCount = await EnvModel.count();
 
     let isInitialized = true;
     if (