结构调整，便于后续扩展

AIStudio.Wpf.BaseDiagram/Extensions/ViewModels/PathItemViewModel.cs

@@ -0,0 +1,24 @@
+using Util.DiagramDesigner;
+
+namespace AIStudio.Wpf.BaseDiagram.Extensions.ViewModels
+{
+    public class PathItemViewModel : DesignerItemViewModelBase
+    {
+        public PathItemViewModel() : base()
+        {
+
+        }
+
+        public PathItemViewModel(IDiagramViewModel parent, DesignerItemBase designer) : base(parent, designer)
+        {
+           
+        }
+
+        protected override void Init()
+        {
+            base.Init();
+
+            this.ShowConnectors = false;
+        }
+    }
+}