/** Wipes all localStorage keys and expires every cookie for this origin. */
export function clearSession() {
  if (typeof window === "undefined") return;

  // localStorage
  localStorage.clear();

  // Cookies — expire every cookie that belongs to this path
  document.cookie.split(";").forEach((c) => {
    const key = c.split("=")[0].trim();
    if (key) {
      document.cookie = `${key}=;path=/;max-age=0;expires=Thu, 01 Jan 1970 00:00:00 GMT`;
    }
  });
}