fix: 좌표 변환 시스템 수정 - Matrix 역변환 적용

ScreenToWorld 함수를 Matrix 역변환 방식으로 변경하여
줌/팬 상태에서도 정확한 마우스 좌표 변환 구현.
좌측 영역 객체 선택 문제 해결.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Cs_HMI/AGVNavigationCore/Controls/UnifiedAGVCanvas.Mouse.cs

@@ -14,8 +14,6 @@ namespace AGVNavigationCore.Controls
         {
             Focus(); // 포커스 설정
 
-            if (_canvasMode == CanvasMode.ViewOnly) return;
-
             var worldPoint = ScreenToWorld(e.Location);
             var hitNode = GetNodeAt(worldPoint);
 
@@ -45,8 +43,6 @@ namespace AGVNavigationCore.Controls
 
         private void UnifiedAGVCanvas_MouseDoubleClick(object sender, MouseEventArgs e)
         {
-            if (_canvasMode == CanvasMode.ViewOnly) return;
-
             var worldPoint = ScreenToWorld(e.Location);
             var hitNode = GetNodeAt(worldPoint);
 
@@ -63,18 +59,7 @@ namespace AGVNavigationCore.Controls
 
             if (e.Button == MouseButtons.Left)
             {
-                // 목적지 선택 모드 처리 (시뮬레이터)
-                if (_editMode == EditMode.SelectTarget)
-                {
-                    var hitNode = GetNodeAt(worldPoint);
-                    if (hitNode != null)
-                    {
-                        TargetNodeSelected?.Invoke(this, hitNode);
-                        return;
-                    }
-                }
-
-                if (_canvasMode == CanvasMode.Edit && _editMode == EditMode.Move)
+                if (_editMode == EditMode.Move)
                 {
                     var hitNode = GetNodeAt(worldPoint);
                     if (hitNode != null)
@@ -208,10 +193,17 @@ namespace AGVNavigationCore.Controls
 
         private Point ScreenToWorld(Point screenPoint)
         {
-            return new Point(
-                (int)((screenPoint.X - _panOffset.X) / _zoomFactor),
-                (int)((screenPoint.Y - _panOffset.Y) / _zoomFactor)
-            );
+            // 변환 행렬 생성 (렌더링과 동일)
+            var transform = new System.Drawing.Drawing2D.Matrix();
+            transform.Scale(_zoomFactor, _zoomFactor);
+            transform.Translate(_panOffset.X, _panOffset.Y);
+
+            // 역변환 행렬로 화면 좌표를 월드 좌표로 변환
+            transform.Invert();
+            var points = new System.Drawing.PointF[] { new System.Drawing.PointF(screenPoint.X, screenPoint.Y) };
+            transform.TransformPoints(points);
+
+            return new Point((int)points[0].X, (int)points[0].Y);
         }
 
         private Point WorldToScreen(Point worldPoint)