dc685e8e7b
- Trim logo background to transparent, use inline style height to
override Pico's img { height: auto } — nav 24px, footer 20px
- Fix heading colors by setting --pico-h1-color through --pico-h6-color
variables and --pico-color override on heading elements
- Add white-space:nowrap on nav CTA button to prevent wrapping
- Add Playwright visual test suite (11 tests): screenshots of landing,
login, signup, mobile; assertions for light background, dark headings,
logo presence, nav layout, no dark remnants
- Screenshots saved to tests/screenshots/ for manual review
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>