[Bug] Fix the register button visibility on hover in dark mode

[deepeshahlawat]

Description

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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]

You have opened issue for KWOC or SWOC? @deepeshahlawat

[Atharvverma1234]

Hello Sir, I would like to work upon this issue, Please assign it to me. Thank you.

[Rakesh9100]

Any update or should I assign to other contributor @deepeshahlawat

[deepeshahlawat]

I am working on the issue sir. I'll get it done by today itself. Please assign me and apply relevant tags.

[deepeshahlawat]

You have opened issue for KWOC or SWOC? @deepeshahlawat

SWOC sir

[Rakesh9100]

Okay proceed @deepeshahlawat