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/solid/arrow-down-z-a.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="M183.6 469.6C177.5 476.2 169 480 160 480s-17.5-3.8-23.6-10.4l-88-96c-11.9-13-11.1-33.3 2-45.2s33.3-11.1 45.2 2L128 365.7V64c0-17.7 14.3-32 32-32s32 14.3 32 32V365.7l32.4-35.4c11.9-13 32.2-13.9 45.2-2s13.9 32.2 2 45.2l-88 96zM320 64c0-17.7 14.3-32 32-32H480c12.9 0 24.6 7.8 29.6 19.8s2.2 25.7-6.9 34.9L429.3 160H480c17.7 0 32 14.3 32 32s-14.3 32-32 32H352c-12.9 0-24.6-7.8-29.6-19.8s-2.2-25.7 6.9-34.9L402.7 96H352c-17.7 0-32-14.3-32-32zm96 192c12.1 0 23.2 6.8 28.6 17.7l64 128 16 32c7.9 15.8 1.5 35-14.3 42.9s-35 1.5-42.9-14.3L460.2 448H371.8l-7.2 14.3c-7.9 15.8-27.1 22.2-42.9 14.3s-22.2-27.1-14.3-42.9l16-32 64-128c5.4-10.8 16.5-17.7 28.6-17.7zM395.8 400h40.4L416 359.6 395.8 400z"/></svg>