登录页彻底禁止页面滑动

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/pages/LoginPage.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'react'
+import { useState, useEffect } from 'react'
 import { useNavigate } from 'react-router-dom'
 import { Card, Form, Input, Button, Tabs, message } from 'antd'
 import { UserOutlined, LockOutlined, MailOutlined, MoonOutlined, SunOutlined } from '@ant-design/icons'
@@ -17,6 +17,22 @@ export default function LoginPage() {
   const toggleTheme = useThemeStore((s) => s.toggle)
   const navigate = useNavigate()
 
+  useEffect(() => {
+    const htmlOverflow = document.documentElement.style.overflow
+    const bodyOverflow = document.body.style.overflow
+    const bodyTouchAction = document.body.style.touchAction
+
+    document.documentElement.style.overflow = 'hidden'
+    document.body.style.overflow = 'hidden'
+    document.body.style.touchAction = 'none'
+
+    return () => {
+      document.documentElement.style.overflow = htmlOverflow
+      document.body.style.overflow = bodyOverflow
+      document.body.style.touchAction = bodyTouchAction
+    }
+  }, [])
+
   async function handleSubmit(values: LoginAccountPayload | LoginEmailPayload) {
     setLoading(true)
     try {