refactor(debugview): cosmetic polish — test-seam comment, default-arm comment, tighten severity assertion

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Deployment/DebugView.razor

@@ -306,12 +306,9 @@
     private TreeView<DebugTreeNode>? _attrTree;
     private TreeView<DebugTreeNode>? _alarmTree;
 
-    /// <summary>
-    /// Current-status enumeration of the live attribute dictionary. Read only on
-    /// the render thread (CentralUI-021) — see <see cref="HandleStreamEvent"/>.
-    /// The trees render from <see cref="AttributeForest"/>; this ordered view is
-    /// the single render-thread reader of the raw dictionary.
-    /// </summary>
+    // Retained as a named enumeration target for DebugViewStreamRaceTests (reflection-based);
+    // not consumed in the Blazor markup — the trees render from AttributeForest/AlarmForest.
+    // Still enumerates the live _attributeValues dict on the render thread (CentralUI-021).
     private IReadOnlyList<AttributeValueChanged> FilteredAttributeValues =>
         string.IsNullOrWhiteSpace(_attrFilter)
             ? _attributeValues.Values.OrderBy(a => a.AttributeName).ToList()
@@ -565,6 +562,7 @@
                     _alarmStates[al.AlarmName] = al;
                     break;
                 default:
+                    // Unknown event type — no re-render needed.
                     return;
             }
             StateHasChanged();

tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Deployment/DebugViewAlarmTableTests.cs

@@ -202,7 +202,7 @@ public class DebugViewAlarmTableTests : BunitContext
         var leaf = binding.QuerySelector("ul[role='group'] li[role='treeitem']");
         Assert.NotNull(leaf);
         var leafMarkup = leaf!.OuterHtml;
-        Assert.Contains("800", leafMarkup);            // severity surfaced
+        Assert.Contains("sev 800", leafMarkup);         // severity surfaced
         Assert.Contains("Shelved", leafMarkup);        // composite condition badge
         Assert.Contains("OPC UA", leafMarkup);         // native kind badge
         Assert.Contains("Unacked", leafMarkup);        // active + unacknowledged