refactor: tighten shadcn admin ui polish

frontend/src/features/auth/LoginPage.tsx

@@ -3,7 +3,7 @@ import { AlertCircle, LockKeyhole, UserRound } from 'lucide-react'
 
 import { Alert, AlertDescription, AlertTitle } from '@/components/ui/alert'
 import { Button } from '@/components/ui/button'
-import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 
@@ -60,7 +60,6 @@ export function LoginPage() {
           <Card className="w-full max-w-[400px]">
             <CardHeader>
               <CardTitle>登录平台</CardTitle>
-              <CardDescription>使用管理员账号进入企业后台</CardDescription>
             </CardHeader>
             <CardContent>
               <form className="grid gap-4" onSubmit={handleSubmit}>