fixed GSA writing, added always-edit button and search in file and for file

GsaEditor/ViewModels/SearchResultViewModel.cs

@@ -0,0 +1,19 @@
+namespace GsaEditor.ViewModels;
+
+/// <summary>
+/// A single search hit: a file name match, or a matching line inside a file.
+/// </summary>
+public class SearchResultViewModel
+{
+    /// <summary>
+    /// Alias of the matching archive entry.
+    /// </summary>
+    public string Alias { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Match context for content searches (e.g. "line 12: ..."). Empty for name matches.
+    /// </summary>
+    public string Detail { get; init; } = string.Empty;
+
+    public bool HasDetail => Detail.Length > 0;
+}