feat: replace Web Push with ntfy for medication reminders

Single notification path via ntfy HTTP publish for reliable Android delivery;
remove VAPID, push subscriptions, and SW push handlers. PWA settings show
topic subscribe link; humor texts and deep-link actions unchanged.

Co-authored-by: Cursor <cursoragent@cursor.com>

compose.yml

@@ -6,9 +6,10 @@ services:
       - APP_PIN=${APP_PIN}
       - JWT_SECRET=${JWT_SECRET}
       - JWT_EXPIRE_DAYS=${JWT_EXPIRE_DAYS:-90}
-      - VAPID_PRIVATE_KEY=${VAPID_PRIVATE_KEY}
-      - VAPID_PUBLIC_KEY=${VAPID_PUBLIC_KEY}
-      - VAPID_CLAIMS_EMAIL=${VAPID_CLAIMS_EMAIL:-mailto:admin@schwenk.online}
+      - NTFY_URL=${NTFY_URL:-https://ntfy.schwenk.online}
+      - NTFY_TOPIC=${NTFY_TOPIC:-takeyourmeds}
+      - NTFY_TOKEN=${NTFY_TOKEN:-}
+      - NTFY_CLICK_URL=${NTFY_CLICK_URL:-https://medis.schwenk.online}
       - OPENROUTER_API_KEY=${OPENROUTER_API_KEY:-}
       - OPENROUTER_MODEL=${OPENROUTER_MODEL:-google/gemini-2.0-flash-001}
       - DB_PATH=/data/medis.sqlite