kappa b9094a4013 a11y: accessibility improvements (WCAG 2.1 AA) ...

- Add skip link for keyboard navigation
- Add ARIA labels to interactive elements
- Add aria-hidden to decorative elements (ASCII logo, icons)
- Add aria-live regions for dynamic content
- Add scope="col" to table headers
- Fix footer contrast (remove opacity-50)
- Add prefers-reduced-motion support

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-30 16:52:02 +09:00

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