Added consistent light mode toggle (fixes #)

[Sandraa16012007]

Pull Request Title

Add Light Mode with Theme Toggle and Persistent Preference

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📌 Description

This PR introduces a Light Mode alongside the existing Dark Mode in CryptoHub to improve usability and accessibility.

• Problem solved:
  CryptoHub previously supported only a dark theme, which could be uncomfortable for users in bright environments and did not respect user or system preferences.

• Changes made:

  • Added a theme toggle to switch between Light and Dark modes
  • Implemented Light Mode styles with proper contrast and accessibility
  • Ensured theme is applied consistently across all pages
  • Persisted user theme preference across sessions using local storage (and/or system preference fallback)

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🔗 Related Issue

Closes #237

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🛠 Type of Change

• 🐛 Bug fix (non-breaking change fixing an issue)
• ✨ Enhancement (improves existing functionality)
• 🚀 New feature (adds new functionality)
• ♻️ Refactor (code change that neither fixes a bug nor adds a feature)
• 📝 Documentation update

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✅ Checklist

• Code follows project coding standards
• Self-review completed
• Tests added or updated (if applicable)
• All tests passed locally
• Documentation updated (if required)
• No new warnings or errors introduced

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🧪 Testing Done

• Test cases executed:

  • Switched between Light and Dark modes using the toggle
  • Refreshed the page to verify theme persistence
  • Navigated across multiple pages to confirm consistent theming

• Screenshots (if UI-related):

• Commands used:

  • npm run dev
  • npm run build

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🗒 Additional Notes

• Known limitations:

  • System theme auto-detection may be overridden by stored user preference

• Follow-up tasks:

  • Add theme toggle to additional UI entry points (if needed)
  • Consider animating theme transitions for smoother UX

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[vercel]

@Sandraa16012007 is attempting to deploy a commit to the Karan Manickam's projects Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

🎉 Thanks for the PR, @Sandraa16012007!

We really appreciate you taking the time to contribute to CryptoHub! 💙

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🔗 https://github.com/KaranUnique/CryptoHub---

✅ PR Checklist

Before we review, please ensure:

• Your code follows the project's coding standards
• All file changes are accurate and intentional
• You've tested your changes locally
• Any review comments have been addressed

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We'll review your PR as soon as possible. Keep up the great work! ✨

[KaranUnique]

@Sandraa16012007 Resolve the merge conflicts