Add redundancy panel to status dashboard

Shows mode, role, ServiceLevel, ApplicationUri, and redundant server
set when redundancy is enabled. Primary renders with a green border,
secondary with yellow. Also included in the JSON API response.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUaService.cs

@@ -215,7 +215,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
                 // Step 13: Dashboard
                 _healthCheck = new HealthCheckService();
                 _statusReport = new StatusReportService(_healthCheck, _config.Dashboard.RefreshIntervalSeconds);
-                _statusReport.SetComponents(effectiveMxClient, _metrics, _galaxyStats, _serverHost, _nodeManager);
+                _statusReport.SetComponents(effectiveMxClient, _metrics, _galaxyStats, _serverHost, _nodeManager,
+                    _config.Redundancy, _config.OpcUa.ApplicationUri);
 
                 if (_config.Dashboard.Enabled)
                 {

src/ZB.MOM.WW.LmxOpcUa.Host/Status/StatusData.cs

@@ -39,6 +39,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         /// </summary>
         public Dictionary<string, MetricsStatistics> Operations { get; set; } = new();
 
+        /// <summary>
+        /// Gets or sets the redundancy state when redundancy is enabled.
+        /// </summary>
+        public RedundancyInfo? Redundancy { get; set; }
+
         /// <summary>
         /// Gets or sets footer details such as the snapshot timestamp and service version.
         /// </summary>
@@ -160,6 +165,42 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         public long TotalEvents { get; set; }
     }
 
+    /// <summary>
+    /// Dashboard model for redundancy state. Only populated when redundancy is enabled.
+    /// </summary>
+    public class RedundancyInfo
+    {
+        /// <summary>
+        /// Gets or sets whether redundancy is enabled.
+        /// </summary>
+        public bool Enabled { get; set; }
+
+        /// <summary>
+        /// Gets or sets the redundancy mode (e.g., "Warm", "Hot").
+        /// </summary>
+        public string Mode { get; set; } = "";
+
+        /// <summary>
+        /// Gets or sets this instance's role ("Primary" or "Secondary").
+        /// </summary>
+        public string Role { get; set; } = "";
+
+        /// <summary>
+        /// Gets or sets the current ServiceLevel byte.
+        /// </summary>
+        public byte ServiceLevel { get; set; }
+
+        /// <summary>
+        /// Gets or sets this instance's ApplicationUri.
+        /// </summary>
+        public string ApplicationUri { get; set; } = "";
+
+        /// <summary>
+        /// Gets or sets the list of all server URIs in the redundant set.
+        /// </summary>
+        public List<string> ServerUris { get; set; } = new();
+    }
+
     /// <summary>
     /// Dashboard model for the status page footer.
     /// </summary>

src/ZB.MOM.WW.LmxOpcUa.Host/Status/StatusReportService.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Text;
 using System.Text.Json;
+using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
 using ZB.MOM.WW.LmxOpcUa.Host.Domain;
 using ZB.MOM.WW.LmxOpcUa.Host.GalaxyRepository;
 using ZB.MOM.WW.LmxOpcUa.Host.Metrics;
@@ -21,6 +22,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         private GalaxyRepositoryStats? _galaxyStats;
         private OpcUaServerHost? _serverHost;
         private LmxNodeManager? _nodeManager;
+        private RedundancyConfiguration? _redundancyConfig;
+        private string? _applicationUri;
 
         /// <summary>
         /// Initializes a new status report service for the dashboard using the supplied health-check policy and refresh interval.
@@ -43,13 +46,16 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
         /// <param name="nodeManager">The node manager whose queue depth and MXAccess event throughput should be surfaced on the dashboard.</param>
         public void SetComponents(IMxAccessClient? mxAccessClient, PerformanceMetrics? metrics,
             GalaxyRepositoryStats? galaxyStats, OpcUaServerHost? serverHost,
-            LmxNodeManager? nodeManager = null)
+            LmxNodeManager? nodeManager = null,
+            RedundancyConfiguration? redundancyConfig = null, string? applicationUri = null)
         {
             _mxAccessClient = mxAccessClient;
             _metrics = metrics;
             _galaxyStats = galaxyStats;
             _serverHost = serverHost;
             _nodeManager = nodeManager;
+            _redundancyConfig = redundancyConfig;
+            _applicationUri = applicationUri;
         }
 
         /// <summary>
@@ -90,6 +96,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
                     TotalEvents = _nodeManager?.TotalMxChangeEvents ?? 0
                 },
                 Operations = _metrics?.GetStatistics() ?? new(),
+                Redundancy = BuildRedundancyInfo(),
                 Footer = new FooterInfo
                 {
                     Timestamp = DateTime.UtcNow,
@@ -98,6 +105,30 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             };
         }
 
+        private RedundancyInfo? BuildRedundancyInfo()
+        {
+            if (_redundancyConfig == null || !_redundancyConfig.Enabled)
+                return null;
+
+            var mxConnected = (_mxAccessClient?.State ?? ConnectionState.Disconnected) == ConnectionState.Connected;
+            var dbConnected = _galaxyStats?.DbConnected ?? false;
+            var isPrimary = string.Equals(_redundancyConfig.Role, "Primary", StringComparison.OrdinalIgnoreCase);
+            var baseLevel = isPrimary
+                ? _redundancyConfig.ServiceLevelBase
+                : Math.Max(0, _redundancyConfig.ServiceLevelBase - 50);
+            var calculator = new ServiceLevelCalculator();
+
+            return new RedundancyInfo
+            {
+                Enabled = true,
+                Mode = _redundancyConfig.Mode,
+                Role = _redundancyConfig.Role,
+                ServiceLevel = calculator.Calculate(baseLevel, mxConnected, dbConnected),
+                ApplicationUri = _applicationUri ?? "",
+                ServerUris = new System.Collections.Generic.List<string>(_redundancyConfig.ServerUris)
+            };
+        }
+
         /// <summary>
         /// Generates the operator-facing HTML dashboard for the current bridge status.
         /// </summary>
@@ -131,6 +162,17 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.Status
             sb.AppendLine($"<p>Status: <b>{data.Health.Status}</b> — {data.Health.Message}</p>");
             sb.AppendLine("</div>");
 
+            // Redundancy panel (only when enabled)
+            if (data.Redundancy != null)
+            {
+                var roleColor = data.Redundancy.Role == "Primary" ? "green" : "yellow";
+                sb.AppendLine($"<div class='panel {roleColor}'><h2>Redundancy</h2>");
+                sb.AppendLine($"<p>Mode: <b>{data.Redundancy.Mode}</b> | Role: <b>{data.Redundancy.Role}</b> | Service Level: <b>{data.Redundancy.ServiceLevel}</b></p>");
+                sb.AppendLine($"<p>Application URI: {data.Redundancy.ApplicationUri}</p>");
+                sb.AppendLine($"<p>Redundant Set: {string.Join(", ", data.Redundancy.ServerUris)}</p>");
+                sb.AppendLine("</div>");
+            }
+
             // Subscriptions panel
             sb.AppendLine("<div class='panel gray'><h2>Subscriptions</h2>");
             sb.AppendLine($"<p>Active: {data.Subscriptions.ActiveCount}</p>");