feat(m9/T24b): move-data-connection UI dialog + action

tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/DataConnectionsPageTests.cs

@@ -26,11 +26,17 @@ public class DataConnectionsPageTests : BunitContext
     // keeps every existing test green (no badge / unknown state when no report).
     private readonly IConnectionHealthQueryService _healthQuery =
         Substitute.For<IConnectionHealthQueryService>();
+    // M9-T24b: the page now opens a Move-to-Site dialog that dispatches the move
+    // through IDataConnectionMoveService (the guard-running ManagementActor path).
+    // Substituted so the page renders without a real ManagementActor in scope.
+    private readonly IDataConnectionMoveService _moveService =
+        Substitute.For<IDataConnectionMoveService>();
 
     public DataConnectionsPageTests()
     {
         Services.AddSingleton(_siteRepo);
         Services.AddSingleton(_healthQuery);
+        Services.AddSingleton(_moveService);
         // Satisfy the page's [Inject] IDialogService — the host that actually
         // renders the dialog lives in MainLayout, not in bUnit's render scope.
         Services.AddScoped<IDialogService, DialogService>();
@@ -209,4 +215,52 @@ public class DataConnectionsPageTests : BunitContext
         Assert.Contains("bg-danger", disconnectedBadge.GetAttribute("class"));
         Assert.Contains("Disconnected", disconnectedBadge.TextContent);
     }
+
+    [Fact]
+    public void ConnectionNode_Has_MoveToSiteAction()
+    {
+        // M9-T24b: each connection node exposes a "Move to Site…" action alongside
+        // Edit/Delete.
+        SeedRepos(
+            sites: new[]
+            {
+                new Site("Plant-A", "plant-a") { Id = 1 },
+                new Site("Plant-B", "plant-b") { Id = 2 }
+            },
+            connections: new[] { new DataConnection("PLC-1", "OpcUa", 1) { Id = 100 } });
+
+        var cut = Render<DataConnectionsPage>();
+        FindToggleForLabel(cut, "Plant-A")!.Click();
+
+        Assert.Contains(cut.FindAll("button"),
+            b => b.TextContent.Contains("Move to Site"));
+    }
+
+    [Fact]
+    public void MoveToSite_OpensDialog_ExcludingCurrentSite()
+    {
+        // M9-T24b: clicking "Move to Site…" opens the move dialog whose target-site
+        // picker omits the connection's current site (Plant-A) and lists the others.
+        SeedRepos(
+            sites: new[]
+            {
+                new Site("Plant-A", "plant-a") { Id = 1 },
+                new Site("Plant-B", "plant-b") { Id = 2 },
+                new Site("Plant-C", "plant-c") { Id = 3 }
+            },
+            connections: new[] { new DataConnection("PLC-1", "OpcUa", 1) { Id = 100 } });
+
+        var cut = Render<DataConnectionsPage>();
+        FindToggleForLabel(cut, "Plant-A")!.Click();
+
+        cut.FindAll("button").First(b => b.TextContent.Contains("Move to Site")).Click();
+
+        // The dialog renders with a site picker; the current site is excluded.
+        var dialog = cut.Find(".modal.show");
+        var optionLabels = dialog.QuerySelectorAll("select option")
+            .Select(o => o.TextContent).ToList();
+        Assert.Contains(optionLabels, l => l.Contains("Plant-B"));
+        Assert.Contains(optionLabels, l => l.Contains("Plant-C"));
+        Assert.DoesNotContain(optionLabels, l => l.Contains("Plant-A"));
+    }
 }