web/middleware.ts

import { NextResponse } from "next/server";
import { auth } from "@/auth";

export default auth((req) => {
  const isAuthenticated = Boolean(req.auth);
  const { pathname } = req.nextUrl;

  if (pathname === "/login" && isAuthenticated) {
    return NextResponse.redirect(new URL("/", req.nextUrl));
  }

  return NextResponse.next();
});

export const config = {
  matcher: ["/login"],
};