Pageaside fixes

[zenoachtig]

• Fixes the overscroll issue that prevents the page outline from being scrolled
• Standardises the buttons in PageFeedbackForm to have better corners, active & disabled styles
• Improves the floating "On this page" menu on OpenAPI pages with circular corner support and better conditional padding

[changeset-bot]

🦋 Changeset detected

Latest commit: 8cae501

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-nf8bnz1ih-gitbook.vercel.app	✅
Cloudflare	https://7271445a-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-nf8bnz1ih-gitbook.vercel.app/url/gitbook.com/docs	https://7271445a-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-nf8bnz1ih-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://7271445a-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	51 changed	Aug 15, 2025, 8:32 AM
v2-cloudflare (Inspect)	👍 Changes approved	1 changed	Aug 15, 2025, 8:36 AM
v2-vercel (Inspect)	👍 Changes approved	1 changed	Aug 15, 2025, 8:33 AM