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/microblog.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="M399.36,362.23c29.49-34.69,47.1-78.34,47.1-125.79C446.46,123.49,346.86,32,224,32S1.54,123.49,1.54,236.44,101.14,440.87,224,440.87a239.28,239.28,0,0,0,79.44-13.44,7.18,7.18,0,0,1,8.12,2.56c18.58,25.09,47.61,42.74,79.89,49.92a4.42,4.42,0,0,0,5.22-3.43,4.37,4.37,0,0,0-.85-3.62,87,87,0,0,1,3.69-110.69ZM329.52,212.4l-57.3,43.49L293,324.75a6.5,6.5,0,0,1-9.94,7.22L224,290.92,164.94,332a6.51,6.51,0,0,1-9.95-7.22l20.79-68.86-57.3-43.49a6.5,6.5,0,0,1,3.8-11.68l71.88-1.51,23.66-67.92a6.5,6.5,0,0,1,12.28,0l23.66,67.92,71.88,1.51a6.5,6.5,0,0,1,3.88,11.68Z"/></svg>