export async function api(url, options = {}) {
  const res = await fetch(url, {
    credentials: 'include',
    headers: { 'Content-Type': 'application/json', ...options.headers },
    ...options,
    body: options.body ? JSON.stringify(options.body) : undefined,
  })

  if (!res.ok) {
    const error = await res.json().catch(() => ({}))
    throw new Error(error.error || `HTTP ${res.status}`)
  }

  return res.json()
}