[Style] Enhance the navbar menu visibility in the dark mode

[deepeshahlawat]

Description

When viewing on a small screen, the navbar adjust to 3 line format. If we are using dark mode, these Icons becomes invisible.

Screenshots

Checklist

• I have checked the existing issues.
• I follow Contributing Guidelines of this project.
• I am a SWOC'25 contributor.

Code of Conduct

• I agree to follow this project's "Code of Conduct".

[github-actions]

Hey @deepeshahlawat, Welcome to the project Eventica! 🎊
Thanks for opening an issue! 🙌 Please wait for the issue to be assigned. Happy Coding!! ✨

[Rakesh9100]

Go ahead, fix the hamburger menu and nav items visibility @deepeshahlawat

[Rakesh9100]

PR update @deepeshahlawat

[deepeshahlawat]

PR update @deepeshahlawat

working on it, it will be done by today @Rakesh9100

[github-actions]

Hello @deepeshahlawat! Your issue #49 has been closed. Thank you for your contribution!! 🙌