backend/src/Tnsu.ApprovalRoute.Application/TemplateRoutes/TemplateRouteService.cs

@@ -177,7 +177,9 @@ public sealed class TemplateRouteService(
         foreach (var step in matchingSteps)
             steps.Add(await ResolveStepAsync(step, email, employee.Company, projectExecutors, cancellationToken));
 
-        return Result.Ok(new ResolveTemplateRouteResultDto(route.Id, route.RouteType, route.RequiresControl, steps));
+        var collapsedSteps = CollapseByExecutorEmail(steps);
+
+        return Result.Ok(new ResolveTemplateRouteResultDto(route.Id, route.RouteType, route.RequiresControl, collapsedSteps));
     }
 
     private Task<bool> HasDuplicateAsync(
@@ -223,6 +225,22 @@ public sealed class TemplateRouteService(
         return new ResolvedRouteStepDto(step.Id, step.OrderNo, resolvedEmail, resolvedPosition, step.AllowReassignToOtherApprovers);
     }
 
+    private static IReadOnlyList<ResolvedRouteStepDto> CollapseByExecutorEmail(IReadOnlyList<ResolvedRouteStepDto> steps)
+    {
+        var seenEmails = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        var result = new List<ResolvedRouteStepDto>();
+
+        foreach (var step in steps)
+        {
+            if (!string.IsNullOrWhiteSpace(step.ExecutorEmail) && !seenEmails.Add(step.ExecutorEmail))
+                continue;
+
+            result.Add(step);
+        }
+
+        return result;
+    }
+
     private static TemplateRouteDto ToDto(TemplateRoute e) => new(
         e.Id, e.RouteType, e.RequestTypeId, e.DepartmentId, e.CompanyId, e.ByProject, e.RequiresControl);
 }

backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/TemplateRouteServiceTests.cs

@@ -178,6 +178,56 @@ public sealed class TemplateRouteServiceTests : IClassFixture<PostgresDatabaseFi
         resolved.Value.Steps[0].ExecutorEmail.ShouldBe("approver@tnsu.kz");
     }
 
+    [Fact(DisplayName = "Резолв маршрута схлопывает шаги, резолвящиеся в одинаковый email, оставляя шаг с меньшим OrderNo")]
+    public async Task ResolveAsync_StepsResolveToSameEmail_CollapsesToLowestOrderNo()
+    {
+        // Arrange
+        var portalClient = new Mock<ITnsuPortalClient>();
+        portalClient
+            .Setup(x => x.GetEmployeeByEmailAsync(It.IsAny<string>(), It.IsAny<CancellationToken>()))
+            .ReturnsAsync(new EmployeeDirectoryInfo(CompanyId, DepartmentId, "ТОО TANSU Construction", "Тестовая должность"));
+        portalClient
+            .Setup(x => x.GetManagerAsync(It.IsAny<string>(), "chief", It.IsAny<CancellationToken>()))
+            .ReturnsAsync("dup@tnsu.kz");
+
+        var services = TestServiceProviderFactory.Build(_connectionString, portalClient: portalClient.Object);
+        var routeService = services.GetRequiredService<TemplateRouteService>();
+        var requestTypeService = services.GetRequiredService<RequestTypeService>();
+        var stepService = services.GetRequiredService<TemplateRouteStepService>();
+
+        var requestTypeId = (await requestTypeService.CreateAsync(
+            new CreateRequestTypeRequest("Collapse duplicates request", "/collapse-duplicates"), CancellationToken.None)).Value.Id;
+        var route = await routeService.CreateAsync(
+            new CreateTemplateRouteRequest(RouteType.Sequential, requestTypeId, DepartmentId, CompanyId, ByProject: false, RequiresControl: false),
+            CancellationToken.None);
+
+        await stepService.CreateAsync(
+            route.Value.Id,
+            new CreateTemplateRouteStepRequest(1, "dup@tnsu.kz", null, null, null, RouteStepStatus.Approval, false),
+            CancellationToken.None);
+        await stepService.CreateAsync(
+            route.Value.Id,
+            new CreateTemplateRouteStepRequest(2, "other@tnsu.kz", null, null, null, RouteStepStatus.Approval, false),
+            CancellationToken.None);
+        await stepService.CreateAsync(
+            route.Value.Id,
+            new CreateTemplateRouteStepRequest(3, null, null, null, HeadType.Chief, RouteStepStatus.Approval, false),
+            CancellationToken.None);
+
+        // Action
+        var resolved = await routeService.ResolveAsync(
+            new ResolveTemplateRouteRequest(requestTypeId, "someone@tnsu.kz", null, RouteStepStatus.Approval),
+            CancellationToken.None);
+
+        // Assert
+        resolved.IsSuccess.ShouldBeTrue();
+        resolved.Value.Steps.Count.ShouldBe(2);
+        resolved.Value.Steps[0].ExecutorEmail.ShouldBe("dup@tnsu.kz");
+        resolved.Value.Steps[0].OrderNo.ShouldBe(1);
+        resolved.Value.Steps[1].ExecutorEmail.ShouldBe("other@tnsu.kz");
+        resolved.Value.Steps[1].OrderNo.ShouldBe(2);
+    }
+
     [Fact(DisplayName = "Резолв маршрута с ролью в проекте подставляет исполнителя из проекта")]
     public async Task ResolveAsync_ByProjectRole_UsesProjectExecutorEmail()
     {