test(e2e): guard ApiSurfaceFixture partial-init delete + seal TransportImportTests (final review nits)

tests/ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests/Admin/ApiSurfaceFixture.cs

@@ -28,7 +28,12 @@ public sealed class ApiSurfaceFixture : IAsyncLifetime
         }
         catch
         {
-            await CliRunner.DeleteApiMethodAsync(MethodId);
+            // Partial-init guard: MethodId is non-zero only if CreateApiMethodAsync succeeded,
+            // so skip the delete when nothing was created (avoids a phantom delete --id 0).
+            if (MethodId != 0)
+            {
+                await CliRunner.DeleteApiMethodAsync(MethodId);
+            }
             Available = false;
             throw;
         }

tests/ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests/Transport/TransportImportTests.cs

@@ -35,7 +35,7 @@ namespace ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Transport;
 /// </para>
 /// </summary>
 [Collection("Playwright")]
-public class TransportImportTests
+public sealed class TransportImportTests
 {
     private readonly PlaywrightFixture _fixture;