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/less/_rotated-flipped.less

@@ -0,0 +1,31 @@
+// rotating + flipping icons
+// -------------------------
+
+.@{fa-css-prefix}-rotate-90 {
+  transform: rotate(90deg);
+}
+
+.@{fa-css-prefix}-rotate-180 {
+  transform: rotate(180deg);
+}
+
+.@{fa-css-prefix}-rotate-270 {
+  transform: rotate(270deg);
+}
+
+.@{fa-css-prefix}-flip-horizontal {
+  transform: scale(-1, 1);
+}
+
+.@{fa-css-prefix}-flip-vertical {
+  transform: scale(1, -1);
+}
+
+.@{fa-css-prefix}-flip-both,
+.@{fa-css-prefix}-flip-horizontal.@{fa-css-prefix}-flip-vertical {
+  transform: scale(-1, -1);
+}
+
+.@{fa-css-prefix}-rotate-by {
+  transform: rotate(~'var(--@{fa-css-prefix}-rotate-angle, 0)');
+}