Codebasis als Dateien ins Arbeitsrepo statt als Gitlink

QuellCode/CentronERP war nur als Gitlink (Submodul-Referenz auf 79c1142)
getrackt, ohne .gitmodules und ohne erreichbares Remote. Der
Untersuchungsgegenstand der Versuchsreihe war damit nicht reproduzierbar
gesichert: Ein Klon haette ein leeres Verzeichnis erhalten, und die Belege
der 3.287 Anforderungen waeren nicht ueberpruefbar gewesen.

Umstellung:
- Historie nach c:\DEV\CentronERP_git_snapshot_79c1142 ausgelagert
  (vollstaendig lesbar, enthaelt 79c1142 und Vorgaenger 89ccfd6)
- Gitlink aus dem Index entfernt
- Dateiinhalt aufgenommen: 24.557 Dateien, rund 333 MB

Die verschachtelte .gitignore der Codebasis gilt weiter, Build-Artefakte
bleiben ausgeschlossen. Details in Versuche/Versuch_01/_Codebasis-Nachweis.md

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/TicketTests/Ticket155581/Ticket155581ContractPositionChangeStockTogglesAreLoggedTest.cs

@@ -0,0 +1,65 @@
+using System.Linq;
+using Centron.BusinessLogic;
+using Centron.BusinessLogic.EmployeeArea;
+using Centron.BusinessLogic.Sales.Receipts.DataAndResults;
+using Centron.BusinessLogic.WebServices.Sales.Receipts;
+using Centron.Data.Entities.Administration.Logins;
+using Centron.Interfaces;
+using Centron.Interfaces.Administration.Environment;
+using Centron.Interfaces.BL;
+using Centron.Interfaces.Sales.Receipts;
+using Centron.Tests.EndToEnd.Infrastructure;
+using CentronSoftware.Centron.WebServices.Extensions;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace Centron.Tests.EndToEnd.TicketTests.Ticket155581;
+
+/// <summary>
+/// Ticket 155581 (Punkt a): Wenn die "Lagerbuchung umschalten"-Aktion auf einer Vertragsposition
+/// die Abbuchung (ChangeStock) flippt, muss beim Speichern ein Eintrag in AnlageLog
+/// mit Art = ArticlePropertyUpdated (91) entstehen.
+/// </summary>
+public class Ticket155581ContractPositionChangeStockTogglesAreLoggedTest : EndToEndTest
+{
+    private const int ContractI3D = 30;
+    private const int AppUserI3D = 11;
+
+    public Ticket155581ContractPositionChangeStockTogglesAreLoggedTest(ITestOutputHelper testOutputHelper)
+        : base(testOutputHelper)
+    {
+    }
+
+    public override void Execute()
+    {
+        var user = WithSession(s => s.GetBL<AppUserBL>().GetAppUser(f => f.I3D == AppUserI3D));
+        var loggedIn = new LoggedInUser(user);
+
+        var contractResult = WithSession(s => s.GetBL<ReceiptWebServiceBL>().GetReceiptByI3D(ContractI3D, CentronObjectKindNumeric.ContractClass, loggedIn));
+        Assert.Equal(ResultStatus.Success, contractResult.Status);
+
+        var contract = contractResult.Data;
+        var item = contract.GetReceiptItems().FirstOrDefault(f => f.I3D > 0 && f.ArticleI3D.HasValue);
+        Assert.NotNull(item);
+
+        var originalChangeStock = item.ChangeStock;
+        item.ChangeStock = !originalChangeStock;
+
+        var logFilter = $"AnlageI3D = {ContractI3D} AND AnlageArt = {(int)CentronObjectKindNumeric.ContractClass} AND Art = {(int)ReceiptLogKind.ArticlePropertyUpdated} AND Beschreibung LIKE N'%Lagerbuchung%'";
+        var logCountBefore = Sql<int>($"SELECT COUNT(*) FROM AnlageLog WHERE {logFilter}");
+
+        var saveResult = WithSession(s => s.GetBL<ReceiptWebServiceBL>().SaveReceipt(
+            contract,
+            user,
+            new SaveReceiptData { IgnoreCallbacks = true },
+            autoLockIfNewReceipt: false,
+            application: CreatedThroughApplication.CentronNet,
+            receiptTemplateFolderI3D: null));
+
+        Assert.Equal(ResultStatus.Success, saveResult.Status);
+
+        var logCountAfter = Sql<int>($"SELECT COUNT(*) FROM AnlageLog WHERE {logFilter}");
+
+        Assert.True(logCountAfter > logCountBefore, $"Expected new AnlageLog entry for ChangeStock toggle. Before={logCountBefore}, After={logCountAfter}.");
+    }
+}

QuellCode/CentronERP/tests/Centron.Tests.EndToEnd/TicketTests/Ticket155581/Ticket155581RentArticleSaveNormalizesDebitingAndSerialTest.cs

@@ -0,0 +1,64 @@
+using System.Collections.Generic;
+using System.Linq;
+using Centron.BusinessLogic;
+using Centron.BusinessLogic.EmployeeArea;
+using Centron.BusinessLogic.Warehousing;
+using Centron.BusinessLogic.WebServices.Warehousing;
+using Centron.Data.Entities.Administration.Logins;
+using Centron.Data.Entities.Warehousing.StockManagement;
+using Centron.Interfaces.BL;
+using Centron.Tests.EndToEnd.Infrastructure;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace Centron.Tests.EndToEnd.TicketTests.Ticket155581;
+
+/// <summary>
+/// Ticket 155581: Miet-/Portal-Artikel must not persist Abbuchung / SN-Pflicht when inconsistent with WG-Übernahme or API payload.
+/// After PR 20939 the override was silent; ticket 155581 follow-up adds the audit trail (ARTIKlog) for each flipped flag.
+/// </summary>
+public class Ticket155581RentArticleSaveNormalizesDebitingAndSerialTest : EndToEndTest
+{
+    private const int ArticleI3D = 52;
+    private const int AppUserI3D = 11;
+
+    public Ticket155581RentArticleSaveNormalizesDebitingAndSerialTest(ITestOutputHelper testOutputHelper)
+        : base(testOutputHelper)
+    {
+    }
+
+    public override void Execute()
+    {
+        var user = WithSession(f => f.GetBL<AppUserBL>().GetAppUser(f => f.I3D == AppUserI3D));
+        var loggedIn = new LoggedInUser(user);
+
+        // Align with Ticket126856: SN-Flag changes require no active stock / open barcode rows
+        base.Sql($"UPDATE Barcode SET Status = 20 WHERE ArtikelI3D = {ArticleI3D} AND Status IN (1,2, 8)");
+        base.Sql($"UPDATE ARTIK SET Menge = 0 WHERE I3D = {ArticleI3D}");
+
+        var beforeSnapshot = WithSession(f => f.GetBL<ArticleLogBL>().GetArticleLogs(new ArticleLogFilter { ArticleI3Ds = new[] { ArticleI3D } }) ?? new List<ArticleLog>())
+            .Select(l => (l.I3D, l.Kind, l.NewValue, l.Message))
+            .ToHashSet();
+
+        var article = WithSession(f => f.GetBL<ArticleWebServiceBL>().GetArticleByArticleI3D(ArticleI3D));
+        article.IsRentArticle = true;
+        article.ChangeStock = true;
+        article.ScanBarcode = true;
+
+        var saveResult = WithSession(f => f.GetBL<ArticleWebServiceBL>().SaveArticle(article, loggedIn));
+        Assert.Equal(ResultStatus.Success, saveResult.Status);
+
+        var reloaded = WithSession(f => f.GetBL<ArticleWebServiceBL>().GetArticleByArticleI3D(ArticleI3D));
+        Assert.True(reloaded.IsRentArticle);
+        Assert.False(reloaded.ChangeStock);
+        Assert.False(reloaded.ScanBarcode);
+
+        var logsAfter = WithSession(f => f.GetBL<ArticleLogBL>().GetArticleLogs(new ArticleLogFilter { ArticleI3Ds = new[] { ArticleI3D } }));
+        var newLogs = logsAfter
+            .Where(l => !beforeSnapshot.Contains((l.I3D, l.Kind, l.NewValue, l.Message)))
+            .ToList();
+
+        Assert.Contains(newLogs, l => l.Kind == ArticleLogKind.DebigEntry && l.NewValue == "aus" && l.Message.Contains("Speichern"));
+        Assert.Contains(newLogs, l => l.Kind == ArticleLogKind.SerialNumberAtOutflow && l.NewValue == "aus" && l.Message.Contains("Speichern"));
+    }
+}