Enhance usability and localization across components: Update USABILITY_CONCEPT.md with new focus areas, improve user feedback in AppFooter and FamilyView components, and refine text in various UI elements for better clarity and consistency. Replace console logs with user-friendly messages, correct German translations, and streamline interaction logic in multiple components.

frontend/src/utils/threeLoaders.js

@@ -0,0 +1,7 @@
+import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
+import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js';
+
+export {
+  DRACOLoader,
+  GLTFLoader
+};