templates/api.html

<script>
  async function authFetch(url, options = {}) {
    const token = localStorage.getItem("jwt_token");

    options.headers = {
      ...(options.headers || {}),
      "Authorization": "Bearer " + token,
      "Content-Type": "application/json"
    };

    const response = await fetch(url, options);

    if (response.status === 401) {
      alert("Session expired. Please login again.");
      window.location.href = "/auth/login";
      return;
    }

    return response.json();
  }
</script>