Show folder names immediately and refresh stale index sizes without walking the whole drive.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Explorer.App/Settings/SettingsPathBrowse.cs

@@ -0,0 +1,25 @@
+using System.Windows;
+using Microsoft.Win32;
+
+namespace Explorer.App.Settings;
+
+internal static class SettingsPathBrowse
+{
+    public static bool TryPick(Window? owner, string title, string filter, string? current, out string path)
+    {
+        var dlg = new OpenFileDialog
+        {
+            Title = title,
+            Filter = filter,
+            FileName = current ?? ""
+        };
+        if (dlg.ShowDialog(owner) == true)
+        {
+            path = dlg.FileName;
+            return true;
+        }
+
+        path = "";
+        return false;
+    }
+}