Adds a new "Read Books" section below "Currently Reading" in the About
page. Book reviews with star ratings and comments are fetched from a
Directus CMS collection (book_reviews) and displayed with the existing
liquid design system. Includes i18n support (EN/DE), show more/less
toggle, and graceful fallback when the CMS collection does not exist yet.
https://claude.ai/code/session_017E8W9CcHFM5WQVHw74JP34
