feat(adminui): F15 Phase C — config-tab read views (Equipment/UNS/Namespaces/Drivers/Tags/ACLs)

Per Q3 of the rebuild plan, each v1 ClusterDetail tab becomes a separate
route under /clusters/{id}/<tab>. This batch adds read-only table views
for the six core config entity types; live-edit forms with RowVersion
concurrency land in Phase C.2 once the read-view shape is reviewed.

- ClusterEquipment    /clusters/{id}/equipment   — joins via DriverInstance
                                                   so the cluster scope works
- ClusterUns          /clusters/{id}/uns         — Areas + Lines tables
- ClusterNamespaces   /clusters/{id}/namespaces  — Kind + URI + Enabled chip
- ClusterDrivers      /clusters/{id}/drivers     — collapsed list with JSON
                                                   config expandable per Q1
                                                   (typed editors deferred)
- ClusterTags         /clusters/{id}/tags        — first 200 by name + filter
- ClusterAcls         /clusters/{id}/acls        — LDAP group + scope +
                                                   NodePermissions bits

Shared ClusterNav.razor extracted; ClusterOverview + ClusterRedundancy
updated to use it. _Imports.razor adds Components.Shared so the shared
nav is in scope across pages.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/ClusterOverview.razor

@@ -31,10 +31,7 @@ else
         </div>
     </div>
 
-    <ul class="nav nav-tabs mb-3">
-        <li class="nav-item"><a class="nav-link active" href="/clusters/@ClusterId">Overview</a></li>
-        <li class="nav-item"><a class="nav-link" href="/clusters/@ClusterId/redundancy">Redundancy</a></li>
-    </ul>
+    <ClusterNav ClusterId="@ClusterId" ActiveTab="overview" />
 
     <section class="card-grid rise" style="animation-delay:.08s">
         <div class="metric-card">