RND-7985: accessible search

[BrettJephson]

Fixes some issues around search accessibility:

1. Search results did not make sense and were overly verbose, I’ve simplified to “Page with title ‘some title’” and “Section with title ‘some title’” and abbreviated the content in a result that returns a section body so it doesn’t read like War and Peace. With translations provided by Claude.
2. When search results are returned or no results are returned we actually notify the screen reader user
3. We let the screen reader know that this is a combobox with an associated list of results
4. We surface number of results and which is the selected result

[linear]

RND-7985 Search button and search results not accessible with screen readers

[changeset-bot]

🦋 Changeset detected

Latest commit: 072eb95

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
gitbook	Patch

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[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-rg5sxnv7z-gitbook.vercel.app	✅
Cloudflare	https://c1d38bb3-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-rg5sxnv7z-gitbook.vercel.app/url/gitbook.com/docs	https://c1d38bb3-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-rg5sxnv7z-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://c1d38bb3-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

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Build	Status	Details	Updated (UTC)
customers-v2 (Inspect)	👍 Changes approved	8 changed	Sep 23, 2025, 8:41 AM
v2-cloudflare (Inspect)	✅ No changes detected	-	Sep 23, 2025, 8:45 AM
v2-vercel (Inspect)	👍 Changes approved	5 changed	Sep 23, 2025, 8:44 AM