test(inventory): pack-open shape produces acquire history

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

SVSim.UnitTests/Services/Inventory/InventoryHistoryTests.cs

@@ -242,6 +242,36 @@ public class InventoryHistoryTests
         Assert.That(row.RewardDetailId, Is.EqualTo(0));
     }
 
+    [Test]
+    public async Task PackOpen_path_appends_to_acquire_history_when_source_is_set()
+    {
+        // Direct exercise of the GrantSource plumbing as a stand-in for the real /pack/open route.
+        // After Task 11 migrates PackController.Open, a higher-level E2E test could replace this;
+        // for now this asserts the integration shape Pack open will fall into.
+        using var factory = new SVSim.UnitTests.Infrastructure.SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        long cardId = await factory.SeedCardAsync();
+        using var scope = factory.Services.CreateScope();
+        var inv = scope.ServiceProvider.GetRequiredService<SVSim.Database.Services.Inventory.IInventoryService>();
+
+        await using (var tx = await inv.BeginAsync(viewerId, configure: c => c.Source = GrantSource.PackOpen))
+        {
+            await tx.GrantAsync(SVSim.Database.Enums.UserGoodsType.Card, cardId, 1);
+            await tx.GrantAsync(SVSim.Database.Enums.UserGoodsType.Card, cardId, 1);
+            await tx.CommitAsync();
+        }
+
+        using var verifyScope = factory.Services.CreateScope();
+        var ctx = verifyScope.ServiceProvider.GetRequiredService<SVSim.Database.SVSimDbContext>();
+        var rows = await ctx.ViewerAcquireHistory.AsNoTracking()
+            .Where(h => h.ViewerId == viewerId)
+            .OrderBy(h => h.Id)
+            .ToListAsync();
+        Assert.That(rows, Has.Count.EqualTo(2));
+        Assert.That(rows.All(r => r.AcquireType == (int)GrantSource.PackOpen), Is.True);
+        Assert.That(rows.All(r => r.Message == "From buying card packs"), Is.True);
+    }
+
     [Test]
     public async Task Commit_prunes_history_above_retention_cap_per_viewer()
     {