✨ Improved UI: Dark Mode Toggle, Corrected the stunning visuals page by solving 4044 error

[Muthusrihemadharshini]

Hi 👋,

Here are the contributions I've made to enhance the Dataverse project:

• 🔄 Added an attractive dark mode toggle to improve user experience.
• 🎨 Improved the visuals page that was previously incomplete showing 404 error.

Tested everything thoroughly—app runs smoothly with the new changes.

Looking forward to your review and feedback.
Thanks for the opportunity! 🙏

— Contributed as part of GSSoC'25 💫
Please add the gssoc label and appropriate level while merging so that I can get points

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[github-actions]

🎉 Thank you for your contribution! Your pull request has been submitted successfully. A maintainer from team will review it soon. We appreciate your support in making better.

[github-actions]

🎉 Thank you for your contribution! Your pull request has been submitted successfully. A maintainer from Dataverse will review it soon. We appreciate your support in making this project better.