chore(deps): update dependency @vercel/geistdocs to v2.9.3

[vercel-gh-bot-5]

This PR contains the following updates:

Package	Type	Update	Change
@vercel/geistdocs (source)	dependencies	patch	2.9.0 → 2.9.3

Opened by the central geistdocs Renovate in vercel/geistdocs. An upgrade report comment on this PR lists any code changes the site needs. Push those changes to this branch, then review and merge it like any other PR; it never merges on its own.

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[vercel]

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Project	Deployment	Actions	Updated
streamdown	Ready	Preview, v0	Oct 9, 2026 12:46pm UTC

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​vercel/​geistdocs@​2.9.0 ⏵ 2.9.3			+1	+1
	npm/​radix-ui@​1.6.7 ⏵ 1.7.0				-3

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[vercel-gh-bot-5]

Upgrade report: @vercel/geistdocs 2.9.0 → 2.9.3

Code changes needed: Yes

What to change

• If your site's Ask AI chat uses the central Geistdocs chat proxy, add the required server-only bearer token as an environment variable in your site's deployment settings. Requests to the proxy now require this token. The changelog does not name the variable, so use the name given in the Geistdocs documentation. Keep it server-only and never expose it to the browser.
• If your pages rely on the frontmatter description appearing as visible text below the title, add that introduction to the MDX body of each affected page. Descriptions no longer render below page titles, but they are still used for metadata, search, previews, and AI-readable output.

What you get

• Browser Back and Forward now work correctly after you click table of contents entries, heading anchors, or #fragment links in MDX.
• Documentation page titles no longer repeat the frontmatter description below them.
• Inline code in Ask AI user messages is readable in light mode, with theme-aware colors in both themes.
• Dark-mode utilities and Shiki syntax colors now work with .dark-theme, and .dark still works.

_{Summarized by anthropic/claude-opus-5.5 from the geistdocs changelog for 2.9.1–2.9.3. Double-check it against your site before merging.}