self.addEventListener("install", (event) => {
  self.skipWaiting();
});
self.addEventListener("activate", (event) => {
  event.waitUntil(self.clients.claim());
});
self.addEventListener("message", (event) => {
  const data = event.data || {};
  if (data?.type === "PING") {
    if (event.ports && event.ports[0]) {
      event.ports[0].postMessage({ type: "PONG", ts: Date.now(), ok: true });
    } else {
      self.clients.matchAll().then((clients) => {
        clients.forEach((c) => c.postMessage({ type: "PONG", ts: Date.now(), ok: true }));
      });
    }
  }
});