- Add eSIM notification management in `esim_notifications.go` with functions to retrieve, list, and remove notifications.
- Implement parsing logic for pending notifications and notification metadata.
- Create tests for eSIM notification parsing and request handling in `esim_notifications_test.go`.
- Introduce email message construction in `email_message.go` to securely format and send emails.
- Add tests for email message encoding and validation in `email_message_test.go`.
- Enhance the CardPolicyAPN component to manage APN configurations, including adding, editing, and deleting custom APNs.
- Implement UI for displaying and managing APN settings with appropriate validation and user feedback.