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/Shared/ClusterNav.razor

@@ -0,0 +1,24 @@
+@* Shared nav strip rendered above every cluster-scoped page. Per Q3 of the AdminUI rebuild
+   plan, the v1 monolithic ClusterDetail tab host is split into separate routes — these are
+   `<a href>` links, not Blazor router transitions, so each page bootstraps its own data
+   independently and can opt into a heavier render mode without dragging the others. *@
+
+@code {
+    [Parameter, EditorRequired] public string ClusterId { get; set; } = "";
+    [Parameter, EditorRequired] public string ActiveTab { get; set; } = "";
+}
+
+<ul class="nav nav-tabs mb-3">
+    <li class="nav-item"><a class="nav-link @Active("overview")" href="/clusters/@ClusterId">Overview</a></li>
+    <li class="nav-item"><a class="nav-link @Active("equipment")" href="/clusters/@ClusterId/equipment">Equipment</a></li>
+    <li class="nav-item"><a class="nav-link @Active("uns")" href="/clusters/@ClusterId/uns">UNS</a></li>
+    <li class="nav-item"><a class="nav-link @Active("namespaces")" href="/clusters/@ClusterId/namespaces">Namespaces</a></li>
+    <li class="nav-item"><a class="nav-link @Active("drivers")" href="/clusters/@ClusterId/drivers">Drivers</a></li>
+    <li class="nav-item"><a class="nav-link @Active("tags")" href="/clusters/@ClusterId/tags">Tags</a></li>
+    <li class="nav-item"><a class="nav-link @Active("acls")" href="/clusters/@ClusterId/acls">ACLs</a></li>
+    <li class="nav-item"><a class="nav-link @Active("redundancy")" href="/clusters/@ClusterId/redundancy">Redundancy</a></li>
+</ul>
+
+@code {
+    private string Active(string tab) => tab == ActiveTab ? "active" : "";
+}