Six tests covering:
- Skip-to-content link renders on the home page with href="#main".
- Hamburger menu + mobile search toggle buttons carry aria-label
attributes (regression test for icon-only buttons losing their
accessible name).
- Registration is server-side rejected with a birthday error when
the user is under 13; a 14-year-old passes.
- Gender select on channel settings uses "Select…" for the empty
value instead of a second "Prefer not to say".
- Unknown URL returns 404 with the branded body ("Error 404").
The <title> format test for the 404 page is captured in the deploy
checklist instead of here because the exception handler in the
testing env bypasses layouts.app's head and makes the DOM-level
<title> assertion unreliable; curl -I against /no-such on the live
site confirms "Page not found | TAKEONE".
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
