Add DevExpress Reporting and Custom Report Storage

Updated project dependencies to include DevExpress Reporting and PDF Drawing libraries. Registered DevExpress services and middleware in `Program.cs`. Added `CustomReportStorageWebExtension` to handle read-only invoice reports, including database and file system integration. Enhanced logging for better traceability and error handling.

DXApp.TemplateKitProject/Program.cs

@@ -1,11 +1,19 @@
 using DXApp.TemplateKitProject.Data;
+using DXApp.TemplateKitProject.DevExpressExtensions;
 using DXApp.TemplateKitProject.Services;
 using Microsoft.EntityFrameworkCore;
+using DevExpress.AspNetCore;
+using DevExpress.AspNetCore.Reporting;
+using DevExpress.XtraReports.Web.Extensions;
 
 var builder = WebApplication.CreateBuilder(args);
 
 builder.Services.AddRazorPages();
 
+// DevExpress Controls und Reporting Services
+builder.Services.AddDevExpressControls();
+builder.Services.AddScoped<ReportStorageWebExtension, CustomReportStorageWebExtension>();
+
 // Datenbank
 var connectionString = builder.Configuration.GetConnectionString("EcmContext")
     ?? throw new InvalidOperationException("Connection string 'EcmContext' not found.");
@@ -30,12 +38,18 @@ if (!app.Environment.IsDevelopment())
 
 app.UseHttpsRedirection();
 
-// MIME-Types für PDF.js registrieren (einmaliger UseStaticFiles-Aufruf)
+// MIME-Types für PDF.js UND DevExpress registrieren
 var provider = new Microsoft.AspNetCore.StaticFiles.FileExtensionContentTypeProvider();
 provider.Mappings[".mjs"] = "text/javascript";
 provider.Mappings[".ftl"] = "text/plain";
+provider.Mappings[".woff2"] = "font/woff2";
+provider.Mappings[".woff"] = "font/woff";
+
 app.UseStaticFiles(new StaticFileOptions { ContentTypeProvider = provider });
 
+// DevExpress Middleware
+app.UseDevExpressControls();
+
 app.UseRouting();
 app.UseAuthorization();
 app.MapRazorPages();