style: adjust scrollbar background for theme consistency

[rzzf]

https://npmx.dev/package/element-plus

Before	After

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Feb 4, 2026 3:23pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Feb 4, 2026 3:23pm
npmx-lunaria	Ignored		Feb 4, 2026 3:23pm

[coderabbitai]

📝 Walkthrough

Walkthrough

A styling modification was made to the sidebar scrollbar appearance in the package page component. The scrollbar thumb colour on hover/focus was updated from a hardcoded hexadecimal value to a CSS custom property reference. The change affects only the visual styling of the interface element, with no modifications to component logic or functionality. One line was added and one removed.

Suggested reviewers

• danielroe

🚥 Pre-merge checks | ✅ 1

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description check	✅ Passed	The pull request description includes before/after screenshots demonstrating the visual styling changes to the scrollbar for theme consistency, which aligns with the changeset.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

[rzzf]

Thanks!