Accessibility: Improve Lighthouse accessibility score from 95% to 100%

[LNAcodes]

Goal

Achieve a Lighthouse accessibility score of 100%.

Tasks

• Review Lighthouse accessibility report
• Add missing accessible names (aria-label)
• Verify color contrast meets WCAG AA
• Ensure visible focus styles for interactive elements
• Test keyboard navigation (Tab, Enter, Space)
• Re-run Lighthouse audit

Done when

• Lighthouse accessibility score is 100%