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/freebsd.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="M303.7 96.2c11.1-11.1 115.5-77 139.2-53.2 23.7 23.7-42.1 128.1-53.2 139.2-11.1 11.1-39.4.9-63.1-22.9-23.8-23.7-34.1-52-22.9-63.1zM109.9 68.1C73.6 47.5 22 24.6 5.6 41.1c-16.6 16.6 7.1 69.4 27.9 105.7 18.5-32.2 44.8-59.3 76.4-78.7zM406.7 174c3.3 11.3 2.7 20.7-2.7 26.1-20.3 20.3-87.5-27-109.3-70.1-18-32.3-11.1-53.4 14.9-48.7 5.7-3.6 12.3-7.6 19.6-11.6-29.8-15.5-63.6-24.3-99.5-24.3-119.1 0-215.6 96.5-215.6 215.6 0 119 96.5 215.6 215.6 215.6S445.3 380.1 445.3 261c0-38.4-10.1-74.5-27.7-105.8-3.9 7-7.6 13.3-10.9 18.8z"/></svg>