fix: Remove unnecessary margin from sidebar item

[adi-ray]

Description

Eliminated the "loose pixel" which was being shown between sidebar items.

Validation

Before:

After:

Related Issues

Fixes #8082

Check List

• I have read the Contributing Guidelines and made commit messages that follow the guideline.
• I have run pnpm format to ensure the code follows the style guide.
• I have run pnpm test to check if all tests are passing.
• I have run pnpm build to check if the website builds without errors.
• I've covered new added functionality with unit tests if necessary.

[Copilot]

Pull Request Overview

This PR fixes a visual issue by removing unnecessary margin from sidebar items that was causing "loose pixels" to appear between sidebar items.

• Removes the mb-px Tailwind CSS class from sidebar items to eliminate spacing gaps
• Addresses a UI consistency issue where unwanted pixel spacing was visible between navigation items

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Updated (UTC)
nodejs-org	Ready	Preview	Aug 17, 2025 10:03am

[AugustinMauroy]

LGTM

[mikeesto]

As a suggestion... if we add a gap of 1px to:

nodejs.org/packages/ui-components/src/Containers/Sidebar/SidebarGroup/index.module.css

Line 29 in 8ab9cea

.itemList {

then the spacing will remain as it currently is

[ovflowd]

Am I the only one that feels they're too close together now?

[github-actions]

Lighthouse Results

URL	Performance	Accessibility	Best Practices	SEO	Report
/en	🟢 93	🟢 100	🟢 100	🟢 100	🔗
/en/about	🟢 97	🟢 97	🟢 100	🟠 88	🔗
/en/about/previous-releases	🟢 99	🟢 93	🟢 100	🟠 89	🔗
/en/download	🟢 93	🟢 100	🟢 100	🟢 100	🔗
/en/blog	🟢 100	🟢 100	🟢 96	🟢 100	🔗

[avivkeller]

Am I the only one that feels they're too close together now?

bump @adi-ray

[adi-ray]

Am I the only one that feels they're too close together now?

@ovflowd thanks for the note! Were you referring to the normal or the progression sidebars?

[ovflowd]

Am I the only one that feels they're too close together now?

@ovflowd thanks for the note! Were you referring to the normal or the progression sidebars?

All good! We can merge as is :)