Add keyboard shortcuts to exit drawing mode

Co-authored-by: toniolo.luca <toniolo.luca@outlook.com>

Author: cursoragent

src/Captura/Windows/RegionSelector.xaml.cs

@@ -52,6 +52,16 @@ public RegionSelector(RegionSelectorViewModel ViewModel)
                 ViewModel.SelectedTool.Value = InkCanvasEditingMode.None;
                 e.Handled = true;
             };
+            
+            // Add keyboard handler to exit drawing mode (ESC and Space)
+            InkCanvas.PreviewKeyDown += (s, e) =>
+            {
+                if (e.Key == Key.Escape || e.Key == Key.Space)
+                {
+                    ViewModel.SelectedTool.Value = InkCanvasEditingMode.None;
+                    e.Handled = true;
+                }
+            };
         }
 
         void OnToolChange(InkCanvasEditingMode Tool)