Allow hiding toolbar for one session or persistent

[viktorrenkema]

This PR adds a menu to the toolbar shown on either preview/CR links or to authenticated users to:

• minify toolbar
• close toolbar this session
• dont show toolbar anymore at all (stored in local storage, our docs will have an article explaining how to get it back)

Also the styles are updated a bit & using motion values for a much smoother magnification effect.

Still coming up: dragging (needs some more time as the variable width makes it harder)

CleanShot.2025-10-03.at.12.51.41.mp4

[changeset-bot]

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Latest commit: cc5615b

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[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-pe5d3jq8c-gitbook.vercel.app	✅
Cloudflare	https://c8632a44-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-pe5d3jq8c-gitbook.vercel.app/url/gitbook.com/docs	https://c8632a44-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-pe5d3jq8c-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://c8632a44-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	Oct 8, 2025, 7:36 AM
v2-cloudflare (Inspect)	👍 Changes approved	6 changed	Oct 8, 2025, 7:39 AM
v2-vercel (Inspect)	👍 Changes approved	8 changed	Oct 8, 2025, 7:39 AM