Treat pages without visible TOC items as no-toc

[zenoachtig]

One example of this is Nvidia's docs home

[changeset-bot]

🦋 Changeset detected

Latest commit: fa982e6

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-avu4fint4-gitbook.vercel.app	✅
Cloudflare	https://90df95bb-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-avu4fint4-gitbook.vercel.app/url/gitbook.com/docs	https://90df95bb-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-avu4fint4-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://90df95bb-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	4 changed	Nov 3, 2025, 5:26 PM
v2-cloudflare (Inspect)	👍 Changes approved	1 changed	Nov 3, 2025, 5:30 PM
v2-vercel (Inspect)	👍 Changes approved	2 changed	Nov 3, 2025, 5:28 PM