добавил tma в просмотр и отрефакторил код

NResUI/Models/MissionTmaViewModel.cs

@@ -0,0 +1,26 @@
+using MissionTmaLib.Parsing;
+
+namespace NResUI.Models;
+
+public class MissionTmaViewModel
+{
+    public bool HasFile { get; set; }
+    public string? Error { get; set; }
+
+    public MissionTma? Mission { get; set; }
+
+    public string? Path { get; set; }
+
+    public void SetParseResult(MissionTmaParseResult result, string path)
+    {
+        Error = result.Error;
+
+        if (result.Mission != null)
+        {
+            HasFile = true;
+        }
+
+        Mission = result.Mission;
+        Path = path;
+    }
+}