postit: extend shared status bar to main, dialogs and billing flows

src/PostIt/PostIt/ViewModels/SignaturePageViewModel.cs

@@ -42,6 +42,14 @@ public partial class SignaturePageViewModel : ViewModelBase
     [ObservableProperty]
     public partial string StatusMessage { get; set; } = "Prêt.";
 
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.FromMessage("Prêt.");
+
+    partial void OnStatusMessageChanged(string value)
+    {
+        ActionStatus = StatusNotice.FromMessage(value);
+    }
+
     [ObservableProperty]
     public partial int StrokeCount { get; set; }