feat(ui): add Node column + filter to AuditLog grid

tests/ScadaLink.CentralUI.Tests/Components/Audit/AuditFilterBarTests.cs

@@ -3,8 +3,11 @@ using Microsoft.AspNetCore.Components;
 using Microsoft.Extensions.DependencyInjection;
 using NSubstitute;
 using ScadaLink.CentralUI.Components.Audit;
+using ScadaLink.CentralUI.Services;
+using ScadaLink.Commons.Entities.Audit;
 using ScadaLink.Commons.Entities.Sites;
 using ScadaLink.Commons.Interfaces.Repositories;
+using ScadaLink.Commons.Types;
 using ScadaLink.Commons.Types.Audit;
 using ScadaLink.Commons.Types.Enums;
 
@@ -29,6 +32,7 @@ namespace ScadaLink.CentralUI.Tests.Components.Audit;
 public class AuditFilterBarTests : BunitContext
 {
     private readonly ISiteRepository _siteRepo;
+    private readonly IAuditLogQueryService _auditLogQueryService;
 
     public AuditFilterBarTests()
     {
@@ -40,6 +44,17 @@ public class AuditFilterBarTests : BunitContext
                 new("Plant B", "plant-b") { Id = 2 },
             }));
         Services.AddSingleton(_siteRepo);
+
+        // Task 15: the Node multi-select pulls its options from
+        // IAuditLogQueryService.GetDistinctSourceNodesAsync. The default stub
+        // returns the two central nodes the cluster uses; individual tests can
+        // override via _auditLogQueryService.GetDistinctSourceNodesAsync(...).Returns(...).
+        _auditLogQueryService = Substitute.For<IAuditLogQueryService>();
+        _auditLogQueryService.GetDistinctSourceNodesAsync(Arg.Any<CancellationToken>())
+            .Returns(Task.FromResult<IReadOnlyList<string>>(new[] { "central-a", "central-b" }));
+        _auditLogQueryService.QueryAsync(Arg.Any<AuditLogQueryFilter>(), Arg.Any<AuditLogPaging>(), Arg.Any<CancellationToken>())
+            .Returns(Task.FromResult<IReadOnlyList<AuditEvent>>(Array.Empty<AuditEvent>()));
+        Services.AddSingleton(_auditLogQueryService);
     }
 
     [Fact]
@@ -55,6 +70,7 @@ public class AuditFilterBarTests : BunitContext
             "data-test=\"filter-kind\"",
             "data-test=\"filter-status\"",
             "data-test=\"filter-site\"",
+            "data-test=\"filter-node\"",
             "data-test=\"filter-time-range\"",
             "data-test=\"filter-custom-range\"",
             "data-test=\"filter-instance\"",
@@ -160,6 +176,30 @@ public class AuditFilterBarTests : BunitContext
         Assert.Equal(new[] { AuditStatus.Delivered }, captured!.Statuses);
     }
 
+    [Fact]
+    public void NodeMultiSelect_RendersOptions_FromQueryService_AndMapsThroughToFilter()
+    {
+        // Task 15: the Node filter pulls its option set from
+        // IAuditLogQueryService.GetDistinctSourceNodesAsync and threads the
+        // chip selection into AuditLogQueryFilter.SourceNodes.
+        AuditLogQueryFilter? captured = null;
+        var cut = Render<AuditFilterBar>(p => p
+            .Add(c => c.OnFilterChanged, EventCallback.Factory.Create<AuditLogQueryFilter>(this, f => captured = f)));
+
+        // The bar marker plus the option checkboxes for the two cluster nodes
+        // are present after init (the constructor stubs return two nodes).
+        Assert.Contains("data-test=\"filter-node\"", cut.Markup);
+        Assert.Contains("data-test=\"filter-node-ms-opt-central-a\"", cut.Markup);
+        Assert.Contains("data-test=\"filter-node-ms-opt-central-b\"", cut.Markup);
+
+        cut.Find("[data-test=\"filter-node-ms-opt-central-a\"]").Change(true);
+        cut.Find("[data-test=\"filter-apply\"]").Click();
+
+        Assert.NotNull(captured);
+        Assert.NotNull(captured!.SourceNodes);
+        Assert.Equal(new[] { "central-a" }, captured.SourceNodes);
+    }
+
     [Fact]
     public void Apply_WithMultipleStatusChips_PassesAllSelectedStatuses()
     {

tests/ScadaLink.CentralUI.Tests/Components/Audit/AuditResultsGridTests.cs

@@ -123,6 +123,28 @@ public class AuditResultsGridTests : BunitContext
         Assert.Equal(target.EventId, captured!.EventId);
     }
 
+    [Fact]
+    public void Render_IncludesNodeColumn_BetweenSiteAndChannel()
+    {
+        // Task 15: the grid surfaces SourceNode in a dedicated "Node" column
+        // positioned between Site and Channel.
+        StubPage(new List<AuditEvent>
+        {
+            MakeEvent(DateTime.UtcNow.AddMinutes(-1), AuditStatus.Delivered),
+        });
+
+        var cut = Render<AuditResultsGrid>(p => p.Add(c => c.Filter, new AuditLogQueryFilter()));
+
+        Assert.Contains("data-test=\"col-header-Node\"", cut.Markup);
+
+        // The header order must place Node between Site and Channel.
+        var siteIdx = cut.Markup.IndexOf("data-test=\"col-header-Site\"", StringComparison.Ordinal);
+        var nodeIdx = cut.Markup.IndexOf("data-test=\"col-header-Node\"", StringComparison.Ordinal);
+        var channelIdx = cut.Markup.IndexOf("data-test=\"col-header-Channel\"", StringComparison.Ordinal);
+        Assert.True(siteIdx < nodeIdx, "Node column must follow Site.");
+        Assert.True(nodeIdx < channelIdx, "Node column must precede Channel.");
+    }
+
     [Fact]
     public void Render_IncludesExecutionIdColumn()
     {