Released: 2026-09-04

### Features

- The asset page's details side rail can now be collapsed and expanded with a toggle tab (`0eee44478`).

### Bug Fixes

- Route code assets through the shared details side rail instead of their own layout (`bcfd3c0dc`).
- Keep the details card at a fixed width while the rail collapses, so its contents no longer reflow mid-animation (`a052aac2e`).
- Collapse the details rail's grid row rather than only its paint, so the space is actually reclaimed (`856ad6dd6`).
- Stop the prose `dt`/`dd` rules from breaking the Details grid rows (`9422069e2`, `5beb96506`).
- Only inject `/sitemap.xml` when `settings.sitemap` is enabled (`40c89e59a`).
- Give the language disclosure list an accessible name (`597c74828`).

### Other Changes

- Update the zfb peer and development dependency family to 2.15.0 (`d9f5b2f64`). `ts` and `typescript` code fences now resolve to the TypeScript grammar and `tsx` to TypeScriptReact, where both previously fell back to JavaScript highlighting. Token classes stay on zfb's existing semantic-role vocabulary, so themes need no new rules. zfb's content-pipeline fingerprint moves to v3, so the first build after upgrading re-renders cached content.