self.addEventListener("push", (event) => {
  let data = { title: "Echoboard", body: "New activity on your watched content" };
  try {
    data = event.data.json();
  } catch {}

  event.waitUntil(
    self.registration.showNotification(data.title, {
      body: data.body,
      icon: data.icon || "/favicon.ico",
      data: { url: data.url },
    })
  );
});

self.addEventListener("notificationclick", (event) => {
  event.notification.close();
  const raw = event.notification.data?.url || "/";
  const safe = new URL(raw, self.location.origin);
  const url = safe.origin === self.location.origin ? safe.href : "/";
  event.waitUntil(clients.openWindow(url));
});