Sync Schedule Configuration UI panel
epic-external-system-integration-configuration-admin-ui-task-001 — Build the Sync Schedule Configuration panel widget allowing administrators to select sync frequency (hourly, daily, weekly, custom cron), configure time-of-day for scheduled runs, and trigger manual sync operations. Use Design System v3 dark-mode sidebar layout with unified entity color system.
Acceptance Criteria
Technical Requirements
Execution Context
Tier 0 - 440 tasks
Handles integration between different epics or system components. Requires coordination across multiple development streams.
Implementation Notes
Use a BLoC or Riverpod StateNotifier to manage form state — avoid putting business logic in the widget build method. Model the sync schedule as a sealed class or enum with associated data: `HourlySyncSchedule`, `DailySyncSchedule(TimeOfDay time)`, `WeeklySyncSchedule(int weekday, TimeOfDay time)`, `CustomCronSchedule(String expression)`. Serialize to/from a JSON map stored in the `sync_schedule` JSONB column in Supabase. For cron validation, use a simple regex covering the 5-field standard cron format; do not pull in a heavy cron library.
The manual sync trigger should be an optimistic call with error rollback — show loading immediately, revert UI state on error. This panel is a dependency for tasks 002–005, so define the shared `IntegrationAdminPage` scaffold (sidebar + content area layout) here so downstream tasks can slot their panels into it.
Testing Requirements
Write flutter_test widget tests covering: (1) each frequency option renders the correct secondary input, (2) invalid cron expressions show error and block save, (3) ManualSyncButton is disabled when status is not 'active', (4) successful trigger call shows snackbar, (5) failure response shows error. Mock Supabase calls using a fake repository. Write integration tests verifying round-trip persistence: set schedule → save → reload → assert schedule matches. Test on both small (360px) and large (768px) screen widths.
The multi-step Integration Setup Wizard must render different credential fields, field mapping targets, and validation rules depending on the selected integration type. If the type-specific branching logic is implemented as conditional widget trees rather than driven by the Integration Type Registry, the wizard becomes unmaintainable and adding new integration types requires UI code changes.
Mitigation & Contingency
Mitigation: Design the wizard to be metadata-driven from the Integration Type Registry from day one. Credential form fields, required field validation, and mapping target lists are all fetched from the registry, not hardcoded in widgets. Implement one integration type end-to-end first (Xledger) to validate the pattern before building the others.
Contingency: If the metadata-driven approach proves too complex for the initial delivery, implement Xledger and Dynamics as hardcoded wizard variants and create a registry-driven refactor as a follow-up technical debt ticket with a fixed deadline.
The Excluded Features Configuration Panel must wire directly into the feature flag system to suppress HLF app features. If the feature flag system does not yet expose a writable admin interface, this panel cannot save its configuration, blocking the HLF-specific acceptance criteria.
Mitigation & Contingency
Mitigation: Verify that the Organization-scoped Feature Flags feature (a declared dependency) exposes a Dart API for programmatic flag writes before starting this panel. Coordinate with the feature flags team to ensure the write API is available. If needed, schedule this panel as the last item in the epic.
Contingency: If the feature flag write API is unavailable at implementation time, store excluded features in the integration's JSONB settings column and wire them into a local feature flag provider that merges database state with the standard flag system at app startup.
The Field Mapping Editor's usability for non-technical org admins is high-risk. If the visual mapping interface is confusing, admins will configure incorrect mappings that cause silent data corruption in accounting exports — a serious financial risk discovered only at month-end reconciliation.
Mitigation & Contingency
Mitigation: Conduct usability testing with at least one admin user from Blindeforbundet on the field mapping editor prototype before full implementation. Provide descriptive labels and sample data values for all fields. Add a 'test mapping' preview that shows a transformed sample record before saving.
Contingency: If usability testing reveals the visual editor is too complex, implement a simplified list-based mapping editor (select app field → select external field, one row at a time) as a fallback, deferring the drag-and-drop visual editor to a future iteration.
The Credential Management Form's masked fields and connection-test flow may conflict with screen reader requirements — VoiceOver and JAWS must be able to navigate the form, understand which fields are already configured, and receive feedback on connection test results without exposing credential values in accessible text.
Mitigation & Contingency
Mitigation: Design accessible semantics labels for masked fields (e.g., 'API key: configured, last 4 characters: abcd') from the start. Use Flutter's Semantics widget to provide screen-reader-specific text that differs from visual display. Test with VoiceOver on iOS and TalkBack on Android during development, not only at QA.
Contingency: If accessibility conflicts with security requirements for the credential form, implement a separate 'accessibility mode' flow where credential configuration is done through a separate confirmation step that provides more explicit semantic feedback without risk of value exposure.