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.Tests/MxAccess/MxAccessStaSessionTests.cs

@@ -474,45 +474,73 @@ public sealed class MxAccessStaSessionTests
         private int pollCount;
         private int? lastPollThreadId;
 
+        /// <summary>Gets a value indicating whether the alarm client is currently subscribed.</summary>
         public bool IsSubscribed { get; private set; }
+
+        /// <summary>Gets the last alarm subscription name.</summary>
         public string? LastSubscription { get; private set; }
 
         /// <summary>Exception thrown by PollOnce; null to succeed.</summary>
         public Exception? PollException { get; set; }
 
+        /// <summary>Gets the count of PollOnce calls.</summary>
         public int PollCount
         {
             get { lock (gate) return pollCount; }
         }
 
+        /// <summary>Gets the managed thread ID of the last PollOnce call.</summary>
         public int? LastPollThreadId
         {
             get { lock (gate) return lastPollThreadId; }
         }
 
+        /// <summary>Subscribes to alarm events.</summary>
+        /// <param name="subscription">The subscription descriptor.</param>
+        /// <param name="sessionId">The session identifier.</param>
         public void Subscribe(string subscription, string sessionId)
         {
             IsSubscribed = true;
             LastSubscription = subscription;
         }
 
+        /// <summary>Unsubscribes from alarm events.</summary>
         public void Unsubscribe()
         {
             IsSubscribed = false;
         }
 
+        /// <summary>Acknowledges an alarm by guid.</summary>
+        /// <param name="alarmGuid">The alarm GUID.</param>
+        /// <param name="comment">The acknowledgment comment.</param>
+        /// <param name="operatorUser">The operator user name.</param>
+        /// <param name="operatorNode">The operator node name.</param>
+        /// <param name="operatorDomain">The operator domain.</param>
+        /// <param name="operatorFullName">The operator full name.</param>
         public int Acknowledge(Guid alarmGuid, string comment, string operatorUser,
             string operatorNode, string operatorDomain, string operatorFullName)
             => 0;
 
+        /// <summary>Acknowledges an alarm by name.</summary>
+        /// <param name="alarmName">The alarm name.</param>
+        /// <param name="providerName">The provider name.</param>
+        /// <param name="groupName">The alarm group name.</param>
+        /// <param name="comment">The acknowledgment comment.</param>
+        /// <param name="operatorUser">The operator user name.</param>
+        /// <param name="operatorNode">The operator node name.</param>
+        /// <param name="operatorDomain">The operator domain.</param>
+        /// <param name="operatorFullName">The operator full name.</param>
         public int AcknowledgeByName(string alarmName, string providerName, string groupName,
             string comment, string operatorUser, string operatorNode,
             string operatorDomain, string operatorFullName)
             => 0;
 
+        /// <summary>Queries active alarms.</summary>
+        /// <param name="alarmFilterPrefix">Optional alarm name filter prefix.</param>
         public IReadOnlyList<ActiveAlarmSnapshot> QueryActive(string? alarmFilterPrefix)
             => Array.Empty<ActiveAlarmSnapshot>();
 
+        /// <summary>Polls for alarm events once.</summary>
         public void PollOnce()
         {
             lock (gate)
@@ -527,6 +555,7 @@ public sealed class MxAccessStaSessionTests
             }
         }
 
+        /// <inheritdoc />
         public void Dispose() { }
     }
 }