initial commit

ViewModels/Dialogs/ProgressViewModel.cs

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+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace HC_APTBS.ViewModels.Dialogs
+{
+    /// <summary>
+    /// ViewModel for the WProgressDisplay dialog.
+    ///
+    /// <para>
+    /// Shows a progress bar (0–100) and a verbose text line during long-running
+    /// K-Line operations.  The dialog is closed by the parent when the operation
+    /// completes; this ViewModel simply exposes observable properties for binding.
+    /// </para>
+    /// </summary>
+    public sealed partial class ProgressViewModel : ObservableObject
+    {
+        /// <summary>Title text shown in the dialog's title bar.</summary>
+        [ObservableProperty] private string _title = string.Empty;
+
+        /// <summary>Current progress value (0–100).</summary>
+        [ObservableProperty] private int _progressPercent;
+
+        /// <summary>Verbose status message describing the current step.</summary>
+        [ObservableProperty] private string _verboseMessage = string.Empty;
+
+        /// <summary>
+        /// Updates both <see cref="ProgressPercent"/> and <see cref="VerboseMessage"/>
+        /// in a single call.  Thread-safe: may be called from any thread because
+        /// the consumer is expected to marshal to the UI thread before calling.
+        /// </summary>
+        public void Update(int percent, string message)
+        {
+            ProgressPercent = percent;
+            VerboseMessage  = message;
+        }
+    }
+}