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/MxAccessAlarmEventSink.cs

@@ -30,11 +30,15 @@ public sealed class MxAccessAlarmEventSink : IMxAccessEventSink
     private string sessionId = string.Empty;
     private bool attached;
 
+    /// <summary>Initializes a new instance of the MxAccessAlarmEventSink class with default dependencies.</summary>
     public MxAccessAlarmEventSink()
         : this(new MxAccessEventQueue(), new MxAccessEventMapper())
     {
     }
 
+    /// <summary>Initializes a new instance of the MxAccessAlarmEventSink class.</summary>
+    /// <param name="eventQueue">Queue for buffering converted alarm events.</param>
+    /// <param name="eventMapper">Converter for alarm transitions to protobuf format.</param>
     public MxAccessAlarmEventSink(
         MxAccessEventQueue eventQueue,
         MxAccessEventMapper eventMapper)
@@ -71,6 +75,17 @@ public sealed class MxAccessAlarmEventSink : IMxAccessEventSink
     ///     tests can drive the proto build path without a real COM event
     ///     source.
     /// </summary>
+    /// <param name="alarmFullReference">The fully qualified alarm object reference.</param>
+    /// <param name="sourceObjectReference">The object that sourced the alarm.</param>
+    /// <param name="alarmTypeName">The alarm type name.</param>
+    /// <param name="transitionKind">The kind of alarm transition.</param>
+    /// <param name="severity">The alarm severity level.</param>
+    /// <param name="originalRaiseTimestampUtc">The original alarm raise timestamp in UTC, if available.</param>
+    /// <param name="transitionTimestampUtc">The timestamp of this transition in UTC.</param>
+    /// <param name="operatorUser">The user who performed the operation, if applicable.</param>
+    /// <param name="operatorComment">The operator's comment, if any.</param>
+    /// <param name="category">The alarm category.</param>
+    /// <param name="description">The alarm description.</param>
     internal void EnqueueTransition(
         string alarmFullReference,
         string sourceObjectReference,