Next.js middleware for auth gating

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

export function middleware(req: NextRequest) {
  const { pathname } = req.nextUrl;
  const protectedRoute = pathname.startsWith('/dashboard');
  if (!protectedRoute) return NextResponse.next();

  const session = req.cookies.get('session')?.value;
  if (!session) {
    const url = req.nextUrl.clone();
    url.pathname = '/login';
    url.searchParams.set('next', pathname);
    return NextResponse.redirect(url);
  }
  return NextResponse.next();
}

export const config = {
  matcher: ['/dashboard/:path*']
};