- Bring all UI widgets to WCAG 2.2 AAA conformance across all views
- Add accessible labels, roles, descriptions, and announcements
- Bump focus outlines to 3px, target sizes to 44px AAA minimum
- Fix announce()/announce_result() to walk widget tree via parent()
- Add AT-SPI accessibility audit script (tools/a11y-audit.py) that
checks SC 4.1.2, 1.1.1, 1.3.1, 2.1.1, 2.5.5, 2.5.8, 2.4.8,
2.4.9, 2.4.10, 2.1.3 with JSON report output for CI
- Clean up project structure, archive old plan documents
