Engage bar
Optimistic like (persisted per page, exposed as a toggle via aria-pressed), share (Web Share API → popover, with real share links rendered server-side) and RSS. Labels render in the page locale — compare this page under /it/.
Table of contents
The numbered card above is built from a document's h2 headings, and only appears when there are at least two of them.
Related rail
Below: up to three related cards, scoped to the current locale.