Add @axe-core/playwright with Playwright test runner that asserts zero
WCAG 2A/2AA violations across index, live, fleet, setup, and
integrations pages. Fix contrast violations on integrations page: use
darker blue for primary buttons, lighter text for descriptions/hints,
and add body-level dark background in layout.css.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Web Serial-based wizard that takes a non-technical user from unboxed
ESP32-S3 to streaming CSI in under 5 minutes. 8-step state machine:
browser check → connect → flash firmware (esp-web-tools) → provision
WiFi → detect node → guided calibration → placement guidance → complete.
Includes sessionStorage persistence for resumability across page refreshes,
live CSI waveform during calibration, human-friendly error messages for
all failure modes, and comprehensive Jest test coverage (34 tests).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
