Convert TrafagSalesExporter from console app to Blazor Server app with MudBlazor UI

- Replaced console app with .NET 8 Blazor Server architecture
- Added EF Core SQLite database (trafag_exporter.db) with auto-seed data
- Models: HanaServer, Site, SharePointConfig, ExportSettings, ExportLog, SalesRecord
- Services: HanaQueryService (with configurable dateFilter), ExcelExportService,
  SharePointUploadService, ExportOrchestrationService (with live status events),
  TimerBackgroundService (scheduled daily export)
- MudBlazor UI pages: Dashboard (export status + manual trigger), Standorte
  (HANA server + site CRUD), Settings (SharePoint + timer config), Logs (filtered view)
- SAP HANA queries unchanged (INV + CRN with exact SAP B1 table joins)
- SharePoint upload via Microsoft Graph with app registration auth

https://claude.ai/code/session_012heAXNMbbyxqYf2S2HrKLj

TrafagSalesExporter/Models/ExportLog.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace TrafagSalesExporter.Models;
+
+public class ExportLog
+{
+    public int Id { get; set; }
+    public DateTime Timestamp { get; set; }
+    public int SiteId { get; set; }
+
+    [ForeignKey(nameof(SiteId))]
+    public Site? Site { get; set; }
+
+    public string Land { get; set; } = string.Empty;
+    public string TSC { get; set; } = string.Empty;
+    public string Status { get; set; } = string.Empty;
+    public int RowCount { get; set; }
+    public string? ErrorMessage { get; set; }
+    public string FileName { get; set; } = string.Empty;
+    public double DurationSeconds { get; set; }
+}

TrafagSalesExporter/Models/ExportSettings.cs

@@ -0,0 +1,10 @@
+namespace TrafagSalesExporter.Models;
+
+public class ExportSettings
+{
+    public int Id { get; set; }
+    public string DateFilter { get; set; } = "2025-01-01";
+    public int TimerHour { get; set; } = 3;
+    public int TimerMinute { get; set; }
+    public bool TimerEnabled { get; set; } = true;
+}

TrafagSalesExporter/Models/HanaServer.cs

@@ -0,0 +1,20 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace TrafagSalesExporter.Models;
+
+public class HanaServer
+{
+    public int Id { get; set; }
+
+    [Required]
+    public string Name { get; set; } = string.Empty;
+
+    [Required]
+    public string Host { get; set; } = string.Empty;
+
+    public int Port { get; set; } = 30015;
+
+    public string Username { get; set; } = string.Empty;
+
+    public string Password { get; set; } = string.Empty;
+}

TrafagSalesExporter/Models/SharePointConfig.cs

@@ -0,0 +1,11 @@
+namespace TrafagSalesExporter.Models;
+
+public class SharePointConfig
+{
+    public int Id { get; set; }
+    public string SiteUrl { get; set; } = string.Empty;
+    public string ExportFolder { get; set; } = string.Empty;
+    public string TenantId { get; set; } = string.Empty;
+    public string ClientId { get; set; } = string.Empty;
+    public string ClientSecret { get; set; } = string.Empty;
+}

TrafagSalesExporter/Models/Site.cs

@@ -0,0 +1,25 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace TrafagSalesExporter.Models;
+
+public class Site
+{
+    public int Id { get; set; }
+
+    public int HanaServerId { get; set; }
+
+    [ForeignKey(nameof(HanaServerId))]
+    public HanaServer? HanaServer { get; set; }
+
+    [Required]
+    public string Schema { get; set; } = string.Empty;
+
+    [Required]
+    public string TSC { get; set; } = string.Empty;
+
+    [Required]
+    public string Land { get; set; } = string.Empty;
+
+    public bool IsActive { get; set; } = true;
+}