fix: switch to @vitejs/plugin-react-swc and manual component registration

- Replace @vitejs/plugin-react with @vitejs/plugin-react-swc to fix
  React Refresh preamble detection error in cross-origin Docker setup
- Register React components manually via window.resolveReactComponent
  since ux-react's registerReactControllerComponents uses Webpack's
  require.context API which is incompatible with Vite

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -15,7 +15,7 @@
     "react-dom": "^19.0"
   },
   "devDependencies": {
-    "@vitejs/plugin-react": "^4.3",
+    "@vitejs/plugin-react-swc": "^4.3.0",
     "vite": "^6.0",
     "vite-plugin-symfony": "^8.0"
   }