📖 Resolve navigation bar CSS issue and sidebar toggle functionality.

[thiha-min-thant]

📖 Fix CSS and Toggle Issues in Navigation and Sidebar
Description of the Change: This PR addresses two key issues related to the navigation and sidebar components:

Fixes a CSS styling issue affecting the appearance of the navigation bar.
Resolves a functionality issue with the sidebar toggle, ensuring that it operates as expected.

Related Issue: #4240
Closes: #4239
Closes: #4240

[k8s-ci-robot]

Hi @thiha-min-thant. Thanks for your PR.

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[camilamacedo86]

Thank you a lot for your contribution 🥇

/lgtm
/approved
/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: camilamacedo86, thiha-min-thant

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