Pre-fetch ServiceWorkerRegistration into component state via useEffect in both
PushPermissionPrompt and SettingsSheet. Gate the subscribe tap target as disabled
until both vapidKey AND swRegistration are ready. The tap handler now has zero
awaits between the user gesture and registration.pushManager.subscribe(), fully
satisfying the iOS user-gesture requirement.
- Create SettingsSheet.tsx: bottom sheet (role=dialog, z:301, Escape+backdrop-close)
with FamilySync Notifications toggle (role=switch, aria-checked, 44px target)
wired to usePushSubscription setEnabled + permission state
and inline permission-denied hint (AlertCircle + 'How to enable') when denied
- Promote PhoneNav avatar div to button with onOpenSettings onClick + aria-label
- Add onOpenSettings prop to DesktopNav; add avatar button at sidebar bottom
- Thread onOpenSettings through AppNavProps
- Add @keyframes spin to tokens.css (fixes missing keyframe used by SettingsSheet + SyncStateToast)