document.addEventListener("DOMContentLoaded", () => {
  const items = document.querySelectorAll(".menu-item");

  function setActive(name) {
    items.forEach(i => {
      i.classList.toggle("active", i.dataset.page === name);
    });
  }

  function bindMenu() {
    items.forEach(item => {
      item.addEventListener("click", () => {
        const page = item.dataset.page;
        setActive(page);
        loadPage(page);
      });
    });
  }

  bindMenu();
  setActive("page1");
  loadPage("page1");
});

function setIMEI(imei) {
  const el = document.getElementById("imei-value");
  if (el) {
    el.textContent = imei;
  }
}

function logout() {
  window.location.href = "/logout";
}