Revert "Refactor PDF viewing and integrate DevExpress support"

This reverts commit b515b4f523.

DXApp.TemplateKitProject/Program.cs

@@ -8,9 +8,6 @@ using DevExpress.XtraReports.Web.Extensions;
 
 var builder = WebApplication.CreateBuilder(args);
 
-// MVC-Controller hinzufügen (benötigt für DevExpress WebDocumentViewer)
-builder.Services.AddControllersWithViews();
-
 builder.Services.AddRazorPages();
 
 // DevExpress Controls und Reporting Services
@@ -55,8 +52,5 @@ app.UseDevExpressControls();
 
 app.UseRouting();
 app.UseAuthorization();
-
-// Controller-Routen verfügbar machen (wichtig für DevExpress WebDocumentViewer)
-app.MapControllers();
 app.MapRazorPages();
 app.Run();