Library pages now end with alternatives (same category) and libraries
that pair well (other categories sharing a use case or tag), limited to
libraries that fit the same framework.

Every library records whether it is free or free with paid extras, its
license, and the official page that says so, checked against each
project's own pricing and license pages. Paid extras and community
collections such as 21st.dev get a short notice under the description.

The side card now sticks where it starts instead of sliding up first.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>