feat: implement routines feature for child and parent modes

- Added backend models for routines, routine items, and schedules.
- Created API endpoints for managing routines and their items.
- Implemented frontend components for routine creation, detail view, and assignment.
- Integrated routines into child view with a scrolling list and approval workflow.
- Added push notifications for routine confirmations and pending approvals.
- Refactored existing components to accommodate new routines functionality.
- Updated tests to cover new routines feature and ensure proper functionality.

frontend/src/components/shared/LoginButton.vue

@@ -19,6 +19,7 @@ import {
   subscribeToPushWithResult,
   unsubscribeFromPush,
   isPushOptedOut,
+  ensurePushSubscriptionSynced,
 } from '@/services/pushSubscription'
 
 const router = useRouter()
@@ -66,6 +67,16 @@ async function fetchUserProfile() {
     if (userImageId.value) {
       await loadAvatarImages(userImageId.value)
     }
+
+    // Silent startup self-heal: if user has push enabled, ensure browser + backend
+    // subscription state are synchronized (no permission prompt).
+    if (
+      isParentAuthenticated.value &&
+      data.push_notifications_enabled !== false &&
+      !isPushOptedOut()
+    ) {
+      void ensurePushSubscriptionSynced()
+    }
   } catch (e) {
     console.error('Error fetching user profile:', e)
     profileLoading.value = false