fix: push delivery when app is closed

- TTL 30s -> 86400 (24h): push services were dropping undelivered notifs
- Urgency: high: wakes device from doze/sleep
- Topic: per-user to collapse duplicate pending pushes
- SW push handler: try/catch for malformed payloads, always call waitUntil
- Bump SW cache to v6

internal/push/handlers.go

@@ -167,7 +167,9 @@ func (h *Handler) SendPush(ctx context.Context, userID string, payload map[strin
 			Subscriber:      h.vapidSubj,
 			VAPIDPublicKey:  h.vapidPub,
 			VAPIDPrivateKey: h.vapidPriv,
-			TTL:             30,
+			TTL:             86400,
+			Urgency:         webpush.UrgencyHigh,
+			Topic:           userID,
 		})
 		if err != nil {
 			h.logger.Error("failed to send push", "error", err, "user_id", userID)
@@ -242,7 +244,9 @@ func (h *Handler) SendChannelNotification(ctx context.Context, channelID, author
 			Subscriber:      h.vapidSubj,
 			VAPIDPublicKey:  h.vapidPub,
 			VAPIDPrivateKey: h.vapidPriv,
-			TTL:             30,
+			TTL:             86400,
+			Urgency:         webpush.UrgencyHigh,
+			Topic:           userID,
 		})
 		if err != nil {
 			h.logger.Error("failed to send push", "error", err, "user_id", userID)

web/public/sw.js

@@ -75,17 +75,23 @@ self.addEventListener('fetch', (event) => {
 
 // Push notifications
 self.addEventListener('push', (event) => {
-  if (!event.data) return;
-  const data = event.data.json();
+  let data = { title: 'Dumpster', body: '', url: '/', tag: 'dumpster-notification' };
+  try {
+    if (event.data) {
+      data = { ...data, ...event.data.json() };
+    }
+  } catch (e) {
+    data.body = event.data ? event.data.text() : '';
+  }
   event.waitUntil(
-    self.registration.showNotification(data.title || 'Dumpster', {
+    self.registration.showNotification(data.title, {
       body: data.body,
       icon: '/icons/icon-192.png',
       badge: '/icons/icon-192.png',
       vibrate: [100, 50, 100],
-      tag: data.tag || 'dumpster-notification',
+      tag: data.tag,
       renotify: true,
-      data: { url: data.url || '/' },
+      data: { url: data.url },
     })
   );
 });