Enhance TG Mini App using react + vite

I need enhancements for my TG mini app, built with React and Vite.

Tasks include:
- Google Pay Integration:
- Add Google Pay button to checkout page.
- Ensure a seamless user experience.

- SignalR Connection Fix:
- Resolve issues with connecting and receiving payment update messages.
- Enable button to show as payment provider.

Ideal skills and experience:
- Proficiency in React and Vite.
- Experience with Google Pay integration.
- Strong understanding of SignalR.
- Focus on seamless user experience.

Please provide relevant work experience in your bid. Thank you!