fix: login security issue frontend (#25571)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

web/app/signup/page.tsx

@@ -0,0 +1,30 @@
+'use client'
+import { useCallback } from 'react'
+import MailForm from './components/input-mail'
+import { useRouter, useSearchParams } from 'next/navigation'
+import { useTranslation } from 'react-i18next'
+
+const Signup = () => {
+  const router = useRouter()
+  const searchParams = useSearchParams()
+  const { t } = useTranslation()
+
+  const handleInputMailSubmitted = useCallback((email: string, result: string) => {
+    const params = new URLSearchParams(searchParams)
+    params.set('token', encodeURIComponent(result))
+    params.set('email', encodeURIComponent(email))
+    router.push(`/signup/check-code?${params.toString()}`)
+  }, [router, searchParams])
+
+  return (
+    <div className="mx-auto mt-8 w-full">
+      <div className="mx-auto mb-10 w-full">
+        <h2 className="title-4xl-semi-bold text-text-primary">{t('login.signup.createAccount')}</h2>
+        <p className='body-md-regular mt-2 text-text-tertiary'>{t('login.signup.welcome')}</p>
+      </div>
+      <MailForm onSuccess={handleInputMailSubmitted} />
+    </div>
+  )
+}
+
+export default Signup