Merge/front/src/components/RequireAuth.jsx

// src/components/RequireAuth.jsx
import React from 'react'
import { Navigate, useLocation } from 'react-router-dom'
import { isLoggedIn } from '../utils/auth'

export function RequireAuth({ children }) {
  const location = useLocation()
  if (!isLoggedIn()) {
    // 未登录跳到 /login，并保存当前尝试访问的地址
    return <Navigate to="/login" replace state={{ from: location }} />
  }
  return children
}