Address code review nitpicks: improve code clarity and organization

- Add parentheses to Delete key condition for clarity
- Introduce _isClearCanvasModalVisible field to track modal state instead of checking UI
- Extract CancelActiveToolSafely() method to reduce code duplication

Co-authored-by: RuntimeRascal <2422222+RuntimeRascal@users.noreply.github.com>

Author: Copilot

Src/GhostDraw/Core/GlobalKeyboardHook.cs

@@ -217,7 +217,7 @@ private nint HookCallback(int nCode, nint wParam, nint lParam)
                 }
 
                 // Check for Delete key press (clear canvas - only when drawing mode is active)
-                if (vkCode == VK_DELETE && isKeyDown && _isDrawingModeActive)
+                if ((vkCode == VK_DELETE) && isKeyDown && _isDrawingModeActive)
                 {
                     _logger.LogDebug("Delete key pressed - clear canvas confirmation request");
                     ClearCanvasPressed?.Invoke(this, EventArgs.Empty);

Src/GhostDraw/Views/OverlayWindow.xaml.cs

@@ -778,7 +778,7 @@ public bool HandleEscapeKey()
         try
         {
             // Check if confirmation modal is visible first (highest priority)
-            if (ClearCanvasModalGrid.Visibility == Visibility.Visible)
+            if (_isClearCanvasModalVisible)
             {
                 _logger.LogDebug("ESC pressed while confirmation modal visible - canceling clear");
                 HideClearCanvasModal();
@@ -897,6 +897,7 @@ private void HideScreenshotSavedToast()
     private Action? _clearCanvasCancelCallback;
     private IDrawingTool? _toolBeforeModal;
     private bool _wasDrawingBeforeModal;
+    private bool _isClearCanvasModalVisible;
 
     /// <summary>
     /// Shows the clear canvas confirmation modal
@@ -916,17 +917,15 @@ public void ShowClearCanvasConfirmation(Action onConfirm, Action onCancel)
             _wasDrawingBeforeModal = _isDrawing;
 
             // Cancel any in-progress drawing
-            if (_activeTool != null)
-            {
-                _activeTool.Cancel(DrawingCanvas);
-            }
+            CancelActiveToolSafely();
 
             // Temporarily disable drawing and reset cursor
             _isDrawing = false;
             this.Cursor = WpfCursors.Arrow;
 
             // Show the modal
             ClearCanvasModalGrid.Visibility = Visibility.Visible;
+            _isClearCanvasModalVisible = true;
 
             _logger.LogDebug("Clear canvas confirmation modal shown");
         }
@@ -1012,6 +1011,7 @@ private void HideClearCanvasModal()
         try
         {
             ClearCanvasModalGrid.Visibility = Visibility.Collapsed;
+            _isClearCanvasModalVisible = false;
             _logger.LogDebug("Clear canvas confirmation modal hidden");
         }
         catch (Exception ex)
@@ -1053,6 +1053,24 @@ private void RestoreToolStateAfterModal()
         }
     }
 
+    /// <summary>
+    /// Safely cancels the active tool if one is active
+    /// </summary>
+    private void CancelActiveToolSafely()
+    {
+        try
+        {
+            if (_activeTool != null)
+            {
+                _activeTool.Cancel(DrawingCanvas);
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to cancel active tool");
+        }
+    }
+
     #endregion
 
     #region Undo/Redo