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[ACCESSIBILITY] Keyboard navigation and color contrast audit #13

@wi287g

Description

@wi287g

Make the dashboard usable for people who don't use a mouse or have color vision differences.

Tasks

  • Verify all interactive elements (search, filter, map counties) are Tab + Enter/Space navigable
  • Check color contrast ratios for status badge text — WCAG AA minimum 4.5:1
  • Add aria-label and role where missing (map div, legend, charts canvas elements)
  • Test with NVDA or VoiceOver — confirm county summary is announced on selection
  • Add a high-contrast/pattern-fill option for colorblind users (replace red/orange with textures or icons)
  • Run Lighthouse accessibility audit; target ≥ 90

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    M4-polishMilestone 4: Polishaccessibilitya11y: keyboard, screen reader, contrast

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