Implement WCAG 2.2 AA accessibility across all components

Use ExcludeSemantics on purely decorative icons and dividers to reduce screen reader noise. Use MergeSemantics to group list item content so VoiceOver reads it as a single announcement rather than individual fragments. For live region announcements, call SemanticsService.announce() inside the BLoC/notifier state listener — not inside build() — to avoid firing on every render. Enforce 44x44dp touch targets by wrapping smaller widgets in a SizedBox with explicit constraints and setting the Semantics.onTap callback.

Document which design token pairs were checked for contrast and their measured ratios — this serves as a record for audits. Blindeforbundet users include visually impaired users with screen readers as a primary interface, so this task has real end-user impact beyond compliance.

Widget tests (flutter_test): use tester.getSemantics() to assert every interactive widget has a non-empty label; assert touch target sizes are >= 44x44dp using tester.getSize(); assert selected/checked semantic properties on filter controls match state. Use Flutter's SemanticsDebugger in a test harness to capture the full semantics tree and assert no unlabeled interactive nodes exist. Manual testing: run VoiceOver (iOS) and TalkBack (Android) through all three components and verify announcements are correct and timely. Contrast testing: use a contrast analyzer tool against the design token color palette to document pass/fail for each text color/background combination.