refactor(ui): rename AuditLog viewer to ConfigurationAuditLog under /audit/configuration (#23 M7)

The pre-M1 IAuditService config-change viewer moves out of the Monitoring
nav group to make room for the new Audit nav group (issue #23 M7). The
old route /monitoring/audit-log returns 404 (no redirect, per plan) — the
viewer is now reachable at /audit/configuration and labelled
"Configuration Audit Log" to disambiguate from the new Audit Log page
(arriving in #23 M7-T9). Inbound references in NavMenu, Dashboard, and
the Playwright nav tests are updated to the new route and label.

src/ScadaLink.CentralUI/Components/Layout/NavMenu.razor

@@ -108,11 +108,11 @@
                         </Authorized>
                     </AuthorizeView>
 
-                    @* Audit Log — Admin only *@
+                    @* Configuration Audit Log — Admin only *@
                     <AuthorizeView Policy="@AuthorizationPolicies.RequireAdmin">
                         <Authorized Context="auditContext">
                             <li class="nav-item">
-                                <NavLink class="nav-link" href="/monitoring/audit-log">Audit Log</NavLink>
+                                <NavLink class="nav-link" href="/audit/configuration">Configuration Audit Log</NavLink>
                             </li>
                         </Authorized>
                     </AuthorizeView>

src/ScadaLink.CentralUI/Components/Pages/Audit/ConfigurationAuditLog.razor

@@ -1,4 +1,4 @@
-@page "/monitoring/audit-log"
+@page "/audit/configuration"
 @using ScadaLink.Security
 @using ScadaLink.CentralUI.Components
 @using ScadaLink.Commons.Entities.Audit
@@ -8,7 +8,7 @@
 @inject IJSRuntime JS
 
 <div class="container-fluid mt-3">
-    <h4 class="mb-3">Audit Log</h4>
+    <h4 class="mb-3">Configuration Audit Log</h4>
 
     <ToastNotification @ref="_toast" />
 

src/ScadaLink.CentralUI/Components/Pages/Dashboard.razor

@@ -70,10 +70,10 @@
             </a>
         </div>
         <div class="col-lg-4 col-md-6 col-12">
-            <a class="card h-100 text-decoration-none text-reset" href="/monitoring/audit-log">
+            <a class="card h-100 text-decoration-none text-reset" href="/audit/configuration">
                 <div class="card-body">
                     <div class="d-flex justify-content-between align-items-start">
-                        <h6 class="mb-1">Recent Audit Log</h6>
+                        <h6 class="mb-1">Configuration Audit Log</h6>
                         <span class="text-muted">&rarr;</span>
                     </div>
                     <p class="text-muted small mb-0">Browse changes to configuration and deployments.</p>