feat(audit): M5.2 per-node stuck-count KPIs (T6) — repo per-node aggregation, actor message pair, CentralUI tiles

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Health/SiteCallKpiTiles.razor

@@ -58,3 +58,31 @@
 {
     <div class="text-muted small mb-3">Site Call KPIs unavailable: @ErrorMessage</div>
 }
+@* ── Per-node stuck/parked sub-table (T6: M5.2 per-node stuck-count KPIs) ── *@
+@if (HasNodeBreakdown)
+{
+    <div class="mb-3">
+        <div class="d-flex justify-content-between align-items-center mb-1">
+            <small class="text-muted">By node</small>
+        </div>
+        <table class="table table-sm table-borderless mb-0 site-call-kpi-node-table">
+            <thead class="table-light">
+                <tr>
+                    <th class="small py-1">Node</th>
+                    <th class="text-end small py-1">Stuck</th>
+                    <th class="text-end small py-1">Parked</th>
+                </tr>
+            </thead>
+            <tbody>
+                @foreach (var n in PerNodeSnapshots!)
+                {
+                    <tr @key="n.SourceNode">
+                        <td class="small py-1"><code>@n.SourceNode</code></td>
+                        <td class="text-end font-monospace small py-1 @(n.StuckCount > 0 ? "text-warning" : "")">@n.StuckCount</td>
+                        <td class="text-end font-monospace small py-1 @(n.ParkedCount > 0 ? "text-danger" : "")">@n.ParkedCount</td>
+                    </tr>
+                }
+            </tbody>
+        </table>
+    </div>
+}

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Health/SiteCallKpiTiles.razor.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore.Components;
 using ZB.MOM.WW.ScadaBridge.Commons.Messages.Audit;
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Audit;
 
 namespace ZB.MOM.WW.ScadaBridge.CentralUI.Components.Health;
 
@@ -59,6 +60,24 @@ public partial class SiteCallKpiTiles
     /// </summary>
     [Parameter] public string? ErrorMessage { get; set; }
 
+    /// <summary>
+    /// Optional per-node KPI breakdown (T6: M5.2 per-node stuck-count KPIs).
+    /// When non-null and non-empty, a compact node-level stuck/parked sub-table
+    /// is rendered below the main tiles. <c>null</c> means the parent has not
+    /// loaded it yet or has opted out — the sub-table is suppressed entirely.
+    /// </summary>
+    [Parameter] public IReadOnlyList<SiteCallNodeKpiSnapshot>? PerNodeSnapshots { get; set; }
+
+    /// <summary>
+    /// True when <see cref="PerNodeSnapshots"/> is a successful query result.
+    /// Used to suppress the sub-table on a load failure.
+    /// </summary>
+    [Parameter] public bool PerNodeAvailable { get; set; }
+
+    /// <summary>Whether the per-node sub-table has data to render.</summary>
+    internal bool HasNodeBreakdown =>
+        PerNodeAvailable && PerNodeSnapshots is { Count: > 0 };
+
     // ── Buffered tile ───────────────────────────────────────────────────────
 
     private string BufferedDisplay =>