第十二章：proxy.ts —— 门禁、分流、入口检查

// proxy.ts
import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export function proxy(request: NextRequest) {
  const isDashboard = request.nextUrl.pathname.startsWith('/dashboard');
  const hasSession = request.cookies.has('session');

  if (isDashboard && !hasSession) {
    return NextResponse.redirect(new URL('/login', request.url));
  }

  return NextResponse.next();
}