Refactor: Implement Code Splitting

src/components/upload/UppyPhotoSubmissionUploadLazy.tsx

@@ -0,0 +1,15 @@
+import { lazy, Suspense } from 'react';
+import { UploadPlaceholder } from '@/components/loading/PageSkeletons';
+import { UppyPhotoSubmissionUploadProps } from '@/types/submissions';
+
+const UppyPhotoSubmissionUpload = lazy(() => 
+  import('./UppyPhotoSubmissionUpload').then(module => ({ default: module.UppyPhotoSubmissionUpload }))
+);
+
+export function UppyPhotoSubmissionUploadLazy(props: UppyPhotoSubmissionUploadProps) {
+  return (
+    <Suspense fallback={<UploadPlaceholder />}>
+      <UppyPhotoSubmissionUpload {...props} />
+    </Suspense>
+  );
+}