Summary

Implement the flow to request notification permissions from the user at an appropriate time, handle the response, and track permission state.

Background

iOS requires explicit user permission for notifications.

• Request after user joins a community
• Provide way to re-prompt or direct to Settings if initially denied

Acceptance Criteria

• Permission requested after user opens app for first time
• Permission result (granted/denied) stored in app state
• apnsDeviceToken received from PushNotificationIOS.register
• Permission check on app launch updates stored state