docs+ui: backfill XML doc comments and finish dashboard layout pass

Adds missing <summary>/<param> XML docs across 99 server, worker, and test
files so CommentChecker reports zero issues (TreatWarningsAsErrors needs the
analyzer clean). Bundles in WIP dashboard work: NavSection extraction,
MainLayout/site.css/js styling alignment, and DashboardOptions/Auth tweaks.

src/ZB.MOM.WW.MxGateway.Worker/MxAccess/MxAccessStaSession.cs

@@ -50,6 +50,7 @@ public sealed class MxAccessStaSession : IWorkerRuntimeSession
     /// <see cref="StartAsync(string, int, CancellationToken)"/>; pass <c>null</c> to opt out
     /// of alarm-side commands.
     /// </summary>
+    /// <param name="alarmCommandHandlerFactory">Factory that constructs the alarm-command handler.</param>
     internal MxAccessStaSession(Func<MxAccessEventQueue, Action, IAlarmCommandHandler>? alarmCommandHandlerFactory)
         : this(
             new StaRuntime(),
@@ -130,6 +131,11 @@ public sealed class MxAccessStaSession : IWorkerRuntimeSession
     /// pass <c>null</c> to opt out of alarm-side commands (the worker rejects
     /// them with an "alarm consumer not configured" diagnostic).
     /// </summary>
+    /// <param name="staRuntime">STA thread runtime.</param>
+    /// <param name="factory">MXAccess COM object factory.</param>
+    /// <param name="eventSink">Event sink for MXAccess events.</param>
+    /// <param name="eventQueue">Event queue for buffering MXAccess events.</param>
+    /// <param name="alarmCommandHandlerFactory">Factory that constructs the alarm-command handler.</param>
     public MxAccessStaSession(
         StaRuntime staRuntime,
         IMxAccessComObjectFactory factory,