Redirect login success to admin

frontend/src/pages/Login/Login.tsx

@@ -1,10 +1,12 @@
 import { useState } from 'react'
 import { Input, Button, Form, message } from 'antd'
 import { UserOutlined, LockOutlined } from '@ant-design/icons'
+import { useNavigate } from 'react-router-dom'
 import { useAuthStore } from '../../stores/auth'
 
 function Login() {
   const [loading, setLoading] = useState(false)
+  const navigate = useNavigate()
   const { login } = useAuthStore()
 
   const onFinish = async (values: { username: string; password: string }) => {
@@ -12,6 +14,7 @@ function Login() {
     try {
       await login(values.username, values.password)
       message.success('登录成功')
+      navigate('/admin', { replace: true })
     } catch (error: unknown) {
       const err = error as { response?: { data?: { detail?: string } } }
       message.error(err.response?.data?.detail || '登录失败')