feat(ios): add error handling and integration tests
Implement comprehensive error handling and integration test suite:
Error Handling (Section 8):
- Add iOS-specific error codes to DailyNotificationErrorCodes:
- NOTIFICATION_PERMISSION_DENIED
- PENDING_NOTIFICATION_LIMIT_EXCEEDED
- BG_TASK_NOT_REGISTERED
- BG_TASK_EXECUTION_FAILED
- BACKGROUND_REFRESH_DISABLED
- Add helper methods for iOS-specific error responses
- Enhance error handling in ReactivationManager:
- Database errors handled gracefully (non-fatal)
- Notification center errors handled gracefully (non-fatal)
- Scheduling errors handled gracefully (non-fatal)
- All errors logged, app continues normally
- Partial results returned when operations fail
- Update plugin methods to use iOS-specific error codes:
- getNotificationPermissionStatus uses NOTIFICATION_PERMISSION_DENIED
Integration Tests (Section 9.2):
- Add DailyNotificationRecoveryIntegrationTests:
- Full recovery flow tests (cold start, termination)
- Error handling tests (database, notification center, scheduling)
- App stability tests (no crashes, concurrent operations)
- Partial recovery tests
- Timeout handling tests
- Test coverage:
- 10 integration tests covering recovery scenarios
- Error handling verification
- App stability verification
- Concurrent operation safety
Completes sections 8.1, 8.2, and 9.2 of iOS implementation checklist.
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