Some links and UI improvement

[JayJay1024]

PR-Codex overview

This PR focuses on updating environment variables, modifying styles in configuration files, improving error handling, and enhancing routing logic in the application. It also includes updates to the footer component for better network path management.

Detailed summary

• Added VITE_GRAPHQL_ENDPOINT to .env.mainnet and .env.testnet.
• Commented out unused screens in tailwind.config.js.
• Modified class names in error.tsx and homepage-products/index.tsx.
• Simplified NotFound component to use <Navigate />.
• Updated network path logic in footer.tsx.

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[github-actions]

---helix-home---
Commit: 83ec3b6
Preview: https://helix-home-f7p8mowu5-itering.vercel.app

---helix-redirect---
Commit: 83ec3b6
Preview: https://helix-redirect-page-8mhdh9i9w-itering.vercel.app
---helix-app-mainnet---
Commit: 83ec3b6
Preview: https://helix-apps-rcjznlr3c-itering.vercel.app https://helixbox-dev-mainnet.vercel.app
---helix-app-testnet---
Commit: 83ec3b6
Preview: https://helix-apps-test-1465ecz2n-itering.vercel.app https://helixbox-dev-testnet.vercel.app