[BUG] Fix DOMTokenList error caused by theme names containing spaces

[kunal-10-cloud]

Current behaviour

When running npm run dev, the application throws a DOMTokenList error in the browser console:
The error occurs in src/app/layout.tsx at line 37 where the ThemeProvider component is used. This prevents the application from starting properly and breaks theme switching functionality.

Steps to reproduce

1. Clone the repository
2. Run npm install to install dependencies
3. Run npm run dev to start the development server
4. Open browser console
5. See the DOMTokenList error

Expected outcome

The application should start without any DOMTokenList errors, and theme switching should work correctly. The ThemeProvider should only use valid CSS class tokens (without spaces or special characters).

Screenshots / Recordings

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[github-actions]

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• DevUI