✨ feat(*): 添加扫码枪启动探活、全局退出助手及 README

- 添加扫码枪串口启动探活，检测端口占用并更新 UI 状态
- 新增 ShutdownHelper 安全停止 Host 扩展方法
- 新增 README.md 项目说明文档
- 更新 WorkflowHostedService 启动探活逻辑
- 补充 ShutdownHelper 与 WorkflowHostedService 单元测试
- 优化 DashboardPage 与 SystemSettingsPage 界面布局
- 调整 ModbusTcpPlcService 监控镜像读取逻辑

src/AxiOmron.PcbCheck/ViewModels/MainWindowViewModel.cs

@@ -54,6 +54,7 @@ public partial class MainWindowViewModel : ObservableObject
         Title = "Axi Omron PCB Check";
         Logs = new ObservableCollection<UiLogEntry>();
         RecentBoards = new ObservableCollection<BoardProcessRecord>();
+        PlcMonitorItems = new ObservableCollection<PlcMonitorItem>();
         AdminUnlockStatus = "管理员功能已锁定";
 
         Logs.CollectionChanged += OnLogsCollectionChanged;
@@ -77,6 +78,11 @@ public partial class MainWindowViewModel : ObservableObject
     /// </summary>
     public ObservableCollection<BoardProcessRecord> RecentBoards { get; }
 
+    /// <summary>
+    /// 获取 PLC 实时监控集合。
+    /// </summary>
+    public ObservableCollection<PlcMonitorItem> PlcMonitorItems { get; }
+
     /// <summary>
     /// 获取最近运行日志集合（与 <see cref="Logs"/> 为同一集合，供 UI 绑定语义更清晰）。
     /// </summary>
@@ -141,30 +147,12 @@ public partial class MainWindowViewModel : ObservableObject
     [ObservableProperty]
     private string _faultMessage = string.Empty;
 
-    /// <summary>
-    /// 获取或设置扫码次数。
-    /// </summary>
-    [ObservableProperty]
-    private int _scanTryCount;
-
-    /// <summary>
-    /// 获取或设置 SFTP 查询次数。
-    /// </summary>
-    [ObservableProperty]
-    private int _sftpTryCount;
-
     /// <summary>
     /// 获取或设置结果代码。
     /// </summary>
     [ObservableProperty]
     private ushort _resultCode;
 
-    /// <summary>
-    /// 获取或设置报警代码。
-    /// </summary>
-    [ObservableProperty]
-    private ushort _alarmCode;
-
     /// <summary>
     /// 获取或设置最近触发时间。
     /// </summary>
@@ -183,24 +171,6 @@ public partial class MainWindowViewModel : ObservableObject
     [ObservableProperty]
     private bool _isBusy;
 
-    /// <summary>
-    /// 获取或设置是否存在系统故障。
-    /// </summary>
-    [ObservableProperty]
-    private bool _isFaulted;
-
-    /// <summary>
-    /// 获取或设置是否已完成。
-    /// </summary>
-    [ObservableProperty]
-    private bool _isDone;
-
-    /// <summary>
-    /// 获取或设置是否已触发报警。
-    /// </summary>
-    [ObservableProperty]
-    private bool _isAlarmRaised;
-
     /// <summary>
     /// 获取或设置最近更新时间。
     /// </summary>
@@ -219,12 +189,6 @@ public partial class MainWindowViewModel : ObservableObject
     [ObservableProperty]
     private int _todayErrorCount;
 
-    /// <summary>
-    /// 获取或设置当前活跃告警数量。
-    /// </summary>
-    [ObservableProperty]
-    private int _activeAlarmCount;
-
     /// <summary>
     /// 获取或设置最近一次异常日志的时间文本。
     /// </summary>
@@ -430,27 +394,17 @@ public partial class MainWindowViewModel : ObservableObject
         CurrentBarcode = snapshot.CurrentBarcode;
         ResultDescription = snapshot.ResultDescription;
         FaultMessage = snapshot.FaultMessage;
-        ScanTryCount = snapshot.ScanTryCount;
-        SftpTryCount = snapshot.SftpTryCount;
         ResultCode = snapshot.ResultCode;
-        AlarmCode = snapshot.AlarmCode;
         LastTriggeredAt = snapshot.LastTriggeredAt?.ToString("yyyy-MM-dd HH:mm:ss") ?? "-";
         LastCompletedAt = snapshot.LastCompletedAt?.ToString("yyyy-MM-dd HH:mm:ss") ?? "-";
         IsBusy = snapshot.IsBusy;
-        IsFaulted = snapshot.SystemFault;
-        IsDone = snapshot.ProcessDone;
-        IsAlarmRaised = snapshot.AlarmRaised;
-        ActiveAlarmCount = snapshot.AlarmRaised ? 1 : 0;
         LastUpdatedAt = snapshot.LastUpdatedAt.ToString("yyyy-MM-dd HH:mm:ss");
-    }
 
-    /// <summary>
-    /// 当 <see cref="IsAlarmRaised"/> 发生变化时同步活跃告警计数。
-    /// </summary>
-    /// <param name="value">最新告警状态。</param>
-    partial void OnIsAlarmRaisedChanged(bool value)
-    {
-        ActiveAlarmCount = value ? 1 : 0;
+        PlcMonitorItems.Clear();
+        foreach (PlcMonitorItem item in snapshot.PlcMonitorItems)
+        {
+            PlcMonitorItems.Add(item.Clone());
+        }
     }
 
     /// <summary>