Fix test failures: remove IDeviceClientService injection and add GetPlanning mocks

Co-authored-by: kbeaugrand <9513635+kbeaugrand@users.noreply.github.com>

Author: Copilot

src/IoTHub.Portal.Client/Components/Planning/EditPlanning.razor

@@ -7,7 +7,6 @@
 @inject ILayerClientService LayerClientService
 @inject IDeviceModelsClientService DeviceModelsClientService
 @inject ILoRaWanDeviceModelsClientService LoRaWanDeviceModelsClientService
-@inject IDeviceClientService DeviceClientService
 @inject IDialogService DialogService
 @inject ISnackbar Snackbar
 

src/IoTHub.Portal.Tests.Unit/Client/Dialogs/Layer/LinkDeviceLayerDialogTest.cs

@@ -40,6 +40,10 @@ public async Task LinkDeviceLayerDialog_Search_RendersCorrectlyAsync()
             var searchedDevices = Fixture.CreateMany<TableData<DeviceListItem>>(3).ToList();
             var expectedLayerDto = Fixture.Create<LayerDto>();
 
+            // Setup GetPlanning mock to handle any planning ID (in case the fixture creates one)
+            _ = this.mockPlanningClientService.Setup(service => service.GetPlanning(It.IsAny<string>()))
+                .ReturnsAsync(new PlanningDto { DeviceModelId = null });
+
             _ = this.mockDeviceClientService.Setup(service =>
                     service.GetDevices($"{this.apiBaseUrl}?pageNumber=0&pageSize=5&searchText="))
                 .ReturnsAsync(new PaginationResult<DeviceListItem>
@@ -84,6 +88,9 @@ public async Task LinkDeviceLayerDialog_Search_ShouldDisplayDevicesAsync()
                 Name = Guid.NewGuid().ToString()
             };
 
+            // Setup GetPlanning mock to handle any planning ID (in case the fixture creates one)
+            _ = this.mockPlanningClientService.Setup(service => service.GetPlanning(It.IsAny<string>()))
+                .ReturnsAsync(new PlanningDto { DeviceModelId = null });
 
             _ = this.mockDeviceClientService.Setup(service =>
                     service.GetDevices($"{this.apiBaseUrl}?pageNumber=0&pageSize=5&searchText="))
@@ -140,6 +147,9 @@ public async Task LinkDeviceLayerDialog_Save_UpdatesDevices()
                 Name = Guid.NewGuid().ToString()
             };
 
+            // Setup GetPlanning mock to handle any planning ID (in case the fixture creates one)
+            _ = this.mockPlanningClientService.Setup(service => service.GetPlanning(It.IsAny<string>()))
+                .ReturnsAsync(new PlanningDto { DeviceModelId = null });
 
             _ = this.mockDeviceClientService.Setup(service =>
                     service.GetDevices($"{this.apiBaseUrl}?pageNumber=0&pageSize=5&searchText="))
@@ -270,6 +280,10 @@ public async Task LinkDeviceLayerDialog_Save_UpdatesDevicesFromMultiplePages()
                 Name = Guid.NewGuid().ToString()
             };
 
+            // Setup GetPlanning mock to handle any planning ID (in case the fixture creates one)
+            _ = this.mockPlanningClientService.Setup(service => service.GetPlanning(It.IsAny<string>()))
+                .ReturnsAsync(new PlanningDto { DeviceModelId = null });
+
             // Simulate device on first page (device not yet assigned to any layer)
             var device1 = new DeviceListItem
             {