fix(admin): add InteractiveServer render mode to all interactive Blazor pages; fix wrong hub URLs

Eight pages were using @onclick handlers, Timers, or HubConnections but had no @rendermode,
causing interactivity to be silently dead under static SSR. Added @rendermode RenderMode.InteractiveServer
(with the required @using Microsoft.AspNetCore.Components.Web) to: AlarmsHistorian, Certificates,
Fleet, Home, Hosts, Reservations, DraftEditor, and ImportEquipment.

Also fixed two hub URL bugs: AclsTab and RedundancyTab were connecting to the non-existent
/hubs/fleet-status path; corrected to /hubs/fleet which matches the MapHub<FleetStatusHub>
call in Program.cs. Build: 0 errors, 0 warnings.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/Server/ZB.MOM.WW.OtOpcUa.Admin/Components/Pages/Clusters/RedundancyTab.razor

@@ -131,7 +131,7 @@ else
     private async Task ConnectHubAsync()
     {
         _hub = new HubConnectionBuilder()
-            .WithUrl(Nav.ToAbsoluteUri("/hubs/fleet-status"))
+            .WithUrl(Nav.ToAbsoluteUri("/hubs/fleet"))
             .WithAutomaticReconnect()
             .Build();