UI Toolkit for Meta Ray-Ban Display accessibility and validation

Read ../building-uit-interfaces-web/references/quality-checklist.md and apply it as a release gate, not optional advice.

Read references/validation-playbook.md for state matrices, input-path coverage, and defect triage.

Audit sequence

1. Confirm App/styles and semantic route structure.
2. Inspect component selection and remove custom imitations/nested surfaces.
3. Audit semantic HTML, labels, alt text, roles, value semantics, and duplicate widgets.
4. Navigate exclusively by D-pad/keyboard: normal, rapid repeat, every boundary, disabled/hidden changes.
5. Verify Back dismissal precedence and route focus/scroll restoration.
6. Inspect the entire scroll extent and every applicable component state.
7. Resize to materially different width/height; find hardcoded assumptions and focus clipping.
8. Test target WebView rendering, animation, fonts, masks, blends, portals, and compositing.
9. Add behavior-focused regressions for every defect fixed.
10. Run format, lint, targeted/full tests, production build, and package-export checks.