- Wrap nav in <header> landmark on all pages
- Wrap content in <main id='main-content'> on all pages
- Add skip-to-content link (visually hidden, visible on focus)
- Add skip-link CSS styles
- Add 65 accessibility tests covering all 16 full-layout pages
- All 288 tests passing
BUG-010: Add 301 redirects for clean URLs (/privacy → /privacy.html etc.)
and fix inconsistent href links across legal pages.
FEATURE: Enhanced playground with fullPage, quality, deviceScale,
waitUntil, and waitForSelector controls for better API evaluation.
