Fix personal workspace routing - use empty orgId for /user/files endpoint

b0esche_cloud/lib/pages/home_page.dart

@@ -206,10 +206,10 @@ class _HomePageState extends State<HomePage> with TickerProviderStateMixin {
       // Show selected organization's files
       orgId = state.selectedOrg!.id;
     } else if (authState is AuthAuthenticated) {
-      // Show personal workspace using user's email as workspace ID
-      orgId = authState.email;
+      // Show personal workspace - use empty string to trigger /user/files endpoint
+      orgId = '';
     } else {
-      orgId = 'personal';
+      orgId = '';
     }
 
     // Wrap FileExplorer with required BlocProviders