* feat(docs): migrate to Geistdocs
* fix(chat): align Streamdown highlighter dependencies
* feat(docs): switch navbar to Vercel Labs brand
Bump @vercel/geistdocs to 2.4.1 and set navbarBrand: "labs" so the
docs navbar uses the Vercel Labs logo and links to vercel.com/labs
instead of the default OSS branding.
* fix(docs): migrate Jev page into the content collection and refresh baseline
The merge from main brought the v0.21.0 Jev docs page into the old
app/(main)/docs location that the Geistdocs migration had replaced, so
/docs/jev appeared in the sitemap but 404'd. Move it to
content/docs/jev.mdx with sidebar placement under a new Experimental
section, and refresh the docs baseline hashes for the pages whose
content changed with the merge (api/core, changelog, skills).
* test(docs): refresh core API baseline after main merge
