Scaffold NewMemberOnboardingScreen and deep-link entry
epic-membership-recruitment-peer-mentor-ui-task-008 — Create the NewMemberOnboardingScreen widget and register it in the router as the destination for referral deep links. Consume the inbound deep-link payload from DeepLinkHandler to extract and validate the referral token on screen entry. Show an error state for invalid or expired tokens.
Acceptance Criteria
Technical Requirements
Implementation Notes
Use GoRouter's redirect or onEnter hook to parse the URI and pass the token as an extra or path parameter to the screen. Create a dedicated AsyncNotifierProvider (Riverpod) for token validation state — keep token validation side-effect-free from the widget tree. The ErrorStateWidget should be reusable across other onboarding error scenarios. Ensure the route is protected against direct navigation without a token (guard in GoRouter).
On iOS, configure Associated Domains; on Android, configure intent-filter in AndroidManifest.xml. Store the validated referral token temporarily in a Riverpod StateProvider scoped to the onboarding flow — clear it on success or dismissal.
Testing Requirements
Unit test the token extraction logic in DeepLinkHandler with valid, expired, malformed, and missing token inputs. Widget test NewMemberOnboardingScreen with a mocked Riverpod provider returning each possible state (loading, valid, invalid, expired). Integration test the full deep-link cold-start path using flutter_test + a test Supabase environment. Test both iOS Universal Links and Android App Links URI schemes.
Minimum 80% branch coverage on the screen and its providers.
QR codes rendered at the minimum 200×200 size may fail to scan under typical indoor lighting conditions on older or lower-resolution phone cameras, causing recruitment moments to fail when a peer mentor shows the screen to a prospective member.
Mitigation & Contingency
Mitigation: Set the default QR render size to 260×260 logical pixels (not the 200px minimum) and apply a high-contrast white module background. Test scan reliability on at minimum three physical devices (budget Android, mid-range Android, iPhone SE) before marking the screen as done.
Contingency: If scan reliability remains an issue, add a 'Enlarge QR' full-screen mode triggered by tapping the code, and ensure the text referral URL with copy-to-clipboard is always visible as a fallback sharing method.
The onboarding screen submits attribution and then hands off to an external membership registration URL (HLF's Dynamics portal or similar). If the external URL is unavailable, changes its format, or requires authentication the new member does not have, the conversion funnel is broken at its final step.
Mitigation & Contingency
Mitigation: Confirm the external registration URL and its expected query parameters with HLF's portal team before implementing the handoff. Record the pending_signup attribution event before launching the URL so data is not lost if the external site fails. Display a fallback message with contact information if the URL launch fails.
Contingency: If the external membership URL is not available at feature launch, implement a temporary form that collects name and email and stores a pending_member record in Supabase, allowing coordinators to manually complete registration while the integration is finalised.
Embedding the RecruitmentStatsWidget on the peer mentor home screen may conflict with existing layout components (activity summary, badge shelf), causing overflow or requiring a redesign of the home screen that is outside this epic's scope.
Mitigation & Contingency
Mitigation: Design the widget as a horizontally constrained card with a maximum height of 96dp so it can be inserted into any vertical list without overflow. Coordinate with the home screen's existing layout owners before starting the embedding task.
Contingency: If home screen embedding creates unacceptable layout conflicts, defer embedding to a separate home-screen redesign task and make the widget accessible only via the dedicated ReferralCodeScreen for the initial release.