[DEV-3598] Fix rapidoc headers and remove blue separators

[MarBert]

List of Changes

Fix rapidoc headers and remove blue separators

Motivation and Context

How Has This Been Tested?

Localhost

Screenshots (if appropriate):

Types of changes

• Chore (nothing changes by a user perspective)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[changeset-bot]

🦋 Changeset detected

Latest commit: 7f05d60

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

This PR includes changesets to release 1 package

Name	Type
nextjs-website	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[Copilot]

Pull request overview

Updates the embedded RapiDoc styling to correct header appearance and remove the blue separator lines in read mode.

Changes:

• Added custom CSS for API title/tag/title headers and general heading levels (h1–h5) inside the RapiDoc shadow DOM.
• Removed the read-mode section separator line via CSS override.
• Added a changeset to publish the styling fix as a patch.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
apps/nextjs-website/src/components/atoms/ApiViewer/ApiViewer.tsx	Adds injected shadow-DOM CSS to restyle headings and remove separator borders for RapiDoc.
.changeset/cuddly-singers-like.md	Declares a patch release describing the RapiDoc header/separator styling update.

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[github-actions]

Jira Pull Request Link

This Pull Request refers to the following Jira issue DEV-3598