The All tab is now a click-through of category cards — Books, Lectures &
Conversations, Other quizzes — each opening its books or years, then the
quizzes themselves. Only categories with quizzes get a card. The position
and tab live in the URL (?in=books&book=bg, ?tab=todo), so refresh, Back
and shared links keep your place. Book quizzes list in chapter order.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
