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/android.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><!--! 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="M420.55,301.93a24,24,0,1,1,24-24,24,24,0,0,1-24,24m-265.1,0a24,24,0,1,1,24-24,24,24,0,0,1-24,24m273.7-144.48,47.94-83a10,10,0,1,0-17.27-10h0l-48.54,84.07a301.25,301.25,0,0,0-246.56,0L116.18,64.45a10,10,0,1,0-17.27,10h0l47.94,83C64.53,202.22,8.24,285.55,0,384H576c-8.24-98.45-64.54-181.78-146.85-226.55"/></svg>