Complete React migration improvements and fixes

- Fix button styling inconsistency for 'did' button using proper CSS reset
- Replace Font Awesome spinners with yellow color (#fff700) for consistency
- Implement holographic card effects for special status cards (yui, first, etc.)
- Add cached user data loading from /json/users.json for faster initial load
- Fix loading states to show spinners instead of "User not found" messages
- Clean up debug console logs for production readiness
- Add proper error handling for API calls
- Update CSS imports to use local files from /pkg/ directory

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

public/pkg/font-awesome/svgs/brands/trello.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.5.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2024 Fonticons, Inc. --><path d="M392.3 32H56.1C25.1 32 0 57.1 0 88c-.1 0 0-4 0 336 0 30.9 25.1 56 56 56h336.2c30.8-.2 55.7-25.2 55.7-56V88c.1-30.8-24.8-55.8-55.6-56zM197 371.3c-.2 14.7-12.1 26.6-26.9 26.6H87.4c-14.8.1-26.9-11.8-27-26.6V117.1c0-14.8 12-26.9 26.9-26.9h82.9c14.8 0 26.9 12 26.9 26.9v254.2zm193.1-112c0 14.8-12 26.9-26.9 26.9h-81c-14.8 0-26.9-12-26.9-26.9V117.2c0-14.8 12-26.9 26.8-26.9h81.1c14.8 0 26.9 12 26.9 26.9v142.1z"/></svg>