// lib/json.ts
export function json(data: unknown, init?: ResponseInit) {
  return new Response(
    JSON.stringify(data, (_k, v) => (typeof v === 'bigint' ? v.toString() : v)),
    {
      ...init,
      headers: { 'content-type': 'application/json; charset=utf-8', ...(init?.headers || {}) },
    }
  );
}