feat(dashboard): settings page shows GroupToTag and UntaggedSessionVisibility

src/ZB.MOM.WW.MxGateway.Server/Dashboard/Components/Pages/SettingsPage.razor

@@ -65,6 +65,27 @@ else
                             }
                         </td>
                     </tr>
+                    <tr>
+                        <th scope="row">Dashboard tag mapping</th>
+                        @* Group and tag NAMES are configuration, not tag values — the redaction
+                           rule does not reach them, and an operator asking why a Viewer sees no
+                           sessions needs this map as much as the role map above it. *@
+                        <td>
+                            @if (Snapshot.Configuration.Dashboard.GroupToTag.Count == 0)
+                            {
+                                <span class="text-muted">(none configured)</span>
+                            }
+                            else
+                            {
+                                <ul class="mb-0">
+                                    @foreach (KeyValuePair<string, IReadOnlyList<string>> pair in Snapshot.Configuration.Dashboard.GroupToTag)
+                                    {
+                                        <li><code>@pair.Key</code> → @string.Join(", ", pair.Value)</li>
+                                    }
+                                </ul>
+                            }
+                        </td>
+                    </tr>
                     <tr><th scope="row">Worker executable</th><td><code>@Snapshot.Configuration.Worker.ExecutablePath</code></td></tr>
                     <tr><th scope="row">Worker architecture</th><td>@Snapshot.Configuration.Worker.RequiredArchitecture</td></tr>
                     <tr><th scope="row">Startup timeout</th><td>@Snapshot.Configuration.Worker.StartupTimeoutSeconds seconds</td></tr>
@@ -78,6 +99,7 @@ else
                     <tr><th scope="row">Anonymous localhost</th><td>@Snapshot.Configuration.Dashboard.AllowAnonymousLocalhost</td></tr>
                     <tr><th scope="row">Snapshot interval</th><td>@Snapshot.Configuration.Dashboard.SnapshotIntervalMilliseconds ms</td></tr>
                     <tr><th scope="row">Show tag values</th><td>@Snapshot.Configuration.Dashboard.ShowTagValues</td></tr>
+                    <tr><th scope="row">Untagged session visibility</th><td>@Snapshot.Configuration.Dashboard.UntaggedSessionVisibility</td></tr>
                     <tr><th scope="row">Worker protocol</th><td>@Snapshot.Configuration.Protocol.WorkerProtocolVersion</td></tr>
                 </tbody>
             </table>