Revert "feat: replace Web Push with ntfy for medication reminders"

This reverts commit 1cada42370.

public/sw.js

@@ -1,4 +1,4 @@
-const CACHE = "tym-v1.1.0";
+const CACHE = "tym-v1.0.1";
 const ASSETS = [
   "/",
   "/index.html",
@@ -64,6 +64,62 @@ self.addEventListener("fetch", (event) => {
   );
 });
 
+self.addEventListener("push", (event) => {
+  if (!event.data) return;
+  let data = {};
+  try { data = event.data.json(); } catch { data = { body: event.data.text() }; }
+
+  const options = {
+    body: data.body || "Med-Time!",
+    icon: "/icon-192x192.png",
+    badge: "/icon-72x72.png",
+    silent: data.silent !== false,
+    tag: data.tag || "med-reminder",
+    renotify: true,
+    data: { slot_id: data.slot_id },
+    actions: [
+      { action: "take", title: "Genommen ✓" },
+      { action: "snooze15", title: "+15 Min" },
+      { action: "snooze30", title: "+30 Min" },
+    ],
+  };
+
+  event.waitUntil(
+    self.registration.showNotification(data.title || "TakeYourMeds", options)
+  );
+});
+
+async function apiPost(path, body) {
+  const clients = await self.clients.matchAll({ type: "window" });
+  for (const client of clients) {
+    client.postMessage({ type: "API_ACTION", path, body });
+    return;
+  }
+}
+
+self.addEventListener("notificationclick", (event) => {
+  event.notification.close();
+  const slotId = event.notification.data?.slot_id;
+  const action = event.action;
+
+  if (action === "take" && slotId) {
+    event.waitUntil(
+      self.clients.openWindow(`/?action=take&slot=${slotId}`)
+    );
+    return;
+  }
+
+  if ((action === "snooze15" || action === "snooze30") && slotId) {
+    const minutes = action === "snooze15" ? 15 : 30;
+    event.waitUntil(
+      self.clients.openWindow(`/?action=snooze&slot=${slotId}&minutes=${minutes}`)
+    );
+    return;
+  }
+
+  event.waitUntil(self.clients.openWindow("/"));
+});
+
 self.addEventListener("sync", (event) => {
   if (event.tag === "sync-logs") {
     event.waitUntil(