Add axe-core accessibility tests for the onboarding UI flow. Tests walk
through the onboarding steps and scan for WCAG 2.1 AA violations at each
step.
- Tests cover main onboarding flow steps (connect, WiFi, placement, complete)
- Tests cover re-provision mode and error states
- Tests mock hardware APIs (Web Serial, WebSocket) to avoid dependencies
- Each test fails if WCAG 2.1 AA violations are found
- Tests can be run with: npx playwright test a11y-onboarding
Co-Authored-By: Claude <noreply@anthropic.com>
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