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/appsettings.json

@@ -1,30 +1,8 @@
 {
-  "HanaServers": {
-    "Internal": {
-      "Host": "travtrp0",
-      "Port": 30015,
-      "Username": "",
-      "Password": ""
-    },
-    "India": {
-      "Host": "20.197.20.60",
-      "Port": 30015,
-      "Username": "",
-      "Password": ""
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
     }
-  },
-  "Sites": [
-    { "Schema": "fr01_p", "Server": "Internal", "TSC": "TRFR", "Land": "Frankreich" },
-    { "Schema": "it01_p", "Server": "Internal", "TSC": "TRIT", "Land": "Italien" },
-    { "Schema": "us01_p", "Server": "Internal", "TSC": "TRUS", "Land": "USA" },
-    { "Schema": "TRAFAG_LIVE", "Server": "India", "TSC": "TRIN", "Land": "Indien" }
-  ],
-  "SharePoint": {
-    "SiteUrl": "https://trafagag.sharepoint.com/sites/WorldwideBIPlatform",
-    "ExportFolder": "/Shared Documents/Exports/",
-    "TenantId": "",
-    "ClientId": "",
-    "ClientSecret": ""
-  },
-  "DateFilter": "2025-01-01"
+  }
 }