test(uplifts): cover Admin request-changes and evidence download with empty tier config (SH-327)

Api.SeaHavenIndustries.Tests/UpliftAdminApprovalTests.cs

@@ -123,6 +123,47 @@ public sealed class UpliftAdminApprovalTests
         context.Dispatches.Single().NTEAmount.Should().Be(1000m);
     }
 
+    [Fact]
+    public async Task RequestChanges_Admin_WithEmptyTierConfig_Succeeds()
+    {
+        using var context = NewContext();
+        await SeedPendingAsync(context, 2);
+        var service = NewService(context);
+
+        var result = await service.RequestChangesAsync(UserWithRoles("Admin"), 1, "more detail", CancellationToken.None);
+
+        result.Status.Should().Be(UpliftStatus.ChangesRequested);
+    }
+
+    [Fact]
+    public async Task EvidenceDownload_Admin_WithEmptyTierConfig_ReturnsFile()
+    {
+        using var context = NewContext();
+        var dispatch = await SeedPendingAsync(context, 2);
+        context.VendorCompletionDocuments.Add(new VendorCompletionDocument
+        {
+            VendorId = dispatch.VendorId,
+            DispatchId = dispatch.Id,
+            WorkOrderId = dispatch.WorkOrderId!.Value,
+            OriginalFileName = "invoice.pdf",
+            StoredFileName = "evidence.bin",
+            ContentType = "application/pdf",
+            SizeBytes = 4,
+            ScanStatus = "Passed",
+            ReviewStatus = "Approved",
+            Purpose = "UpliftEvidence",
+            Version = 1
+        });
+        context.DispatchUpliftRequests.Single().EvidenceDocumentId = 1;
+        await context.SaveChangesAsync();
+        var service = NewService(context);
+
+        var result = await service.GetEvidenceForDownloadAsync(UserWithRoles("Admin"), 1, CancellationToken.None);
+
+        result.Outcome.Should().Be(VendorDocumentDownloadOutcome.Ok);
+        result.FileName.Should().Be("invoice.pdf");
+    }
+
     [Theory]
     [InlineData("Dispatcher")]
     [InlineData("Scheduler")]