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/scss/_list.scss

@@ -0,0 +1,18 @@
+// icons in a list
+// -------------------------
+
+.#{$fa-css-prefix}-ul {
+  list-style-type: none;
+  margin-left: var(--#{$fa-css-prefix}-li-margin, #{$fa-li-margin});
+  padding-left: 0;
+
+  > li { position: relative; }
+}
+
+.#{$fa-css-prefix}-li {
+  left: calc(var(--#{$fa-css-prefix}-li-width, #{$fa-li-width}) * -1);
+  position: absolute;
+  text-align: center;
+  width: var(--#{$fa-css-prefix}-li-width, #{$fa-li-width});
+  line-height: inherit;
+}