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.Server/Sessions/GatewaySession.cs

@@ -58,6 +58,21 @@ public sealed class GatewaySession
     {
     }
 
+    /// <summary>
+    /// Initializes a gateway session with session metadata, timeout configuration, and custom lease duration.
+    /// </summary>
+    /// <param name="sessionId">Identifier of the session.</param>
+    /// <param name="backendName">Name of the backend MXAccess proxy server.</param>
+    /// <param name="pipeName">Name of the named pipe for gateway-worker IPC.</param>
+    /// <param name="nonce">Security nonce for worker validation.</param>
+    /// <param name="clientIdentity">Client identity from the authentication context.</param>
+    /// <param name="clientSessionName">Client-supplied session name.</param>
+    /// <param name="clientCorrelationId">Client-supplied correlation identifier.</param>
+    /// <param name="commandTimeout">Timeout for command invocation.</param>
+    /// <param name="startupTimeout">Timeout for worker process startup.</param>
+    /// <param name="shutdownTimeout">Timeout for worker process shutdown.</param>
+    /// <param name="leaseDuration">Duration of the session lease.</param>
+    /// <param name="openedAt">Timestamp when the session opened.</param>
     public GatewaySession(
         string sessionId,
         string backendName,
@@ -158,6 +173,7 @@ public sealed class GatewaySession
     /// </summary>
     public TimeSpan ShutdownTimeout { get; }
 
+    /// <summary>Gets the lease duration for the session.</summary>
     public TimeSpan LeaseDuration { get; }
 
     /// <summary>
@@ -406,6 +422,10 @@ public sealed class GatewaySession
         return await workerClient.InvokeAsync(command, CommandTimeout, cancellationToken).ConfigureAwait(false);
     }
 
+    /// <summary>Gets the item registration for a server and item handle pair.</summary>
+    /// <param name="serverHandle">The MXAccess server handle.</param>
+    /// <param name="itemHandle">The MXAccess item handle.</param>
+    /// <param name="registration">The item registration if found.</param>
     public bool TryGetItemRegistration(
         int serverHandle,
         int itemHandle,
@@ -417,6 +437,9 @@ public sealed class GatewaySession
         }
     }
 
+    /// <summary>Tracks item registrations from a command reply.</summary>
+    /// <param name="command">The executed command.</param>
+    /// <param name="reply">The command reply.</param>
     public void TrackCommandReply(
         MxCommand command,
         MxCommandReply reply)
@@ -608,9 +631,10 @@ public sealed class GatewaySession
             cancellationToken);
     }
 
-    /// <summary>
-    /// Executes a bulk Write command for the specified server and per-item entries.
-    /// </summary>
+    /// <summary>Executes a bulk Write command for the specified server and per-item entries.</summary>
+    /// <param name="serverHandle">Server handle returned by the worker.</param>
+    /// <param name="entries">Write entries to execute.</param>
+    /// <param name="cancellationToken">Token to cancel the asynchronous operation.</param>
     public Task<IReadOnlyList<BulkWriteResult>> WriteBulkAsync(
         int serverHandle,
         IReadOnlyList<WriteBulkEntry> entries,
@@ -631,6 +655,9 @@ public sealed class GatewaySession
     }
 
     /// <summary>Executes a bulk Write2 (timestamped) command.</summary>
+    /// <param name="serverHandle">Server handle returned by the worker.</param>
+    /// <param name="entries">Write entries to execute.</param>
+    /// <param name="cancellationToken">Token to cancel the asynchronous operation.</param>
     public Task<IReadOnlyList<BulkWriteResult>> Write2BulkAsync(
         int serverHandle,
         IReadOnlyList<Write2BulkEntry> entries,
@@ -651,6 +678,9 @@ public sealed class GatewaySession
     }
 
     /// <summary>Executes a bulk WriteSecured command.</summary>
+    /// <param name="serverHandle">Server handle returned by the worker.</param>
+    /// <param name="entries">Write entries to execute.</param>
+    /// <param name="cancellationToken">Token to cancel the asynchronous operation.</param>
     public Task<IReadOnlyList<BulkWriteResult>> WriteSecuredBulkAsync(
         int serverHandle,
         IReadOnlyList<WriteSecuredBulkEntry> entries,
@@ -671,6 +701,9 @@ public sealed class GatewaySession
     }
 
     /// <summary>Executes a bulk WriteSecured2 command.</summary>
+    /// <param name="serverHandle">Server handle returned by the worker.</param>
+    /// <param name="entries">Write entries to execute.</param>
+    /// <param name="cancellationToken">Token to cancel the asynchronous operation.</param>
     public Task<IReadOnlyList<BulkWriteResult>> WriteSecured2BulkAsync(
         int serverHandle,
         IReadOnlyList<WriteSecured2BulkEntry> entries,
@@ -694,6 +727,10 @@ public sealed class GatewaySession
     ///     Executes a bulk Read command — see <c>ReadBulkCommand</c>'s doc
     ///     comment in the .proto for the cached-vs-snapshot semantics.
     /// </summary>
+    /// <param name="serverHandle">Server handle returned by the worker.</param>
+    /// <param name="tagAddresses">Tag addresses to read.</param>
+    /// <param name="timeout">Timeout for the read operation.</param>
+    /// <param name="cancellationToken">Token to cancel the asynchronous operation.</param>
     public Task<IReadOnlyList<BulkReadResult>> ReadBulkAsync(
         int serverHandle,
         IReadOnlyList<string> tagAddresses,