Integration checkpoint for epic-expense-type-selection-user-interface
epic-expense-type-selection-user-interface-integration-task — Integration Task
Integration Purpose
Verify integration with dependent epics: epic-expense-type-selection-foundation, epic-expense-type-selection-core-services
This integration checkpoint ensures proper coordination and compatibility between different epics. It verifies that all interfaces, data flows, and dependencies are correctly implemented before proceeding.
Integrates With Epics
Execution Context
Tier 7 - 84 tasks
Can start after Tier 6 completes
Handles integration between different epics or system components. Requires coordination across multiple development streams.
| Status | pending |
| Type | Integration |
| Estimated | 4h |
| Tier | 7 |
If the expense calculation preview subscribes to the full BLoC state stream, every unrelated state property change (e.g. a loading flag toggle) triggers a widget rebuild. With complex card animations for the disabled-state transition, this could cause frame drops on low-end Android devices used by some peer mentors.
Mitigation & Contingency
Mitigation: Use select() on the Riverpod provider to subscribe only to the specific state slice each widget needs; write a performance test asserting rebuild count on a rapid sequence of toggle events.
Contingency: If jank is detected in device testing, replace animated disabled-state transitions with instant opacity changes and defer animation polish to a follow-up sprint.
The disabled card state requires a specific contrast-safe colour combination that communicates unavailability without relying solely on colour (WCAG 1.4.1). If the current design token palette does not include a disabled-state token with sufficient contrast for text on the disabled background, the widget will either fail WCAG AA or require a last-minute design token addition that could break other components.
Mitigation & Contingency
Mitigation: Audit the existing design token manifest for disabled-state tokens at the start of the epic; if missing, raise with the design lead and add a contrast-validated token before widget implementation begins.
Contingency: If no design review is available, use the established --color-text-disabled and --color-surface-disabled tokens with an added strikethrough or lock icon to satisfy WCAG 1.4.1 non-colour requirement, and document the deviation for design review.