重新设计了创建连线时的逻辑，能够预览连接成功后的外观样式

Serein.Workbench.Avalonia/Custom/Node/Views/ActionNodeView.axaml

@@ -1,15 +1,16 @@
-<UserControl xmlns="https://github.com/avaloniaui"
+<local:NodeControlBase xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              mc:Ignorable="d" d:DesignWidth="200" d:DesignHeight="100"
              x:Class="Serein.Workbench.Avalonia.Custom.Node.Views.ActionNodeView"
              xmlns:vm="clr-namespace:Serein.Workbench.Avalonia.Custom.Node.ViewModels"
+             xmlns:local="clr-namespace:Serein.Workbench.Avalonia.Custom.Node.Views"
              xmlns:baselibrary="clr-namespace:Serein.Library;assembly=Serein.Library"
              xmlns:cv="clr-namespace:Serein.Workbench.Avalonia.Custom.Views"
              xmlns:dtp="using:Serein.Workbench.Avalonia.DataTemplates"
              
-             Background="#C6EEF7" 
+             Background="#C6EEF7"
              x:DataType="vm:ActionNodeViewModel">
   <Design.DataContext>
     <vm:ActionNodeViewModel />
@@ -17,7 +18,7 @@
 
   <Border>
     <Grid RowDefinitions="25,*,*,*,*">
-      
+
       <!--调用控制点，方法名称，下一个方法调用控制点-->
       <Grid x:Name="HeaderGrid" Grid.Row="0" ColumnDefinitions="auto,*,auto"  VerticalAlignment="Center">
         <cv:NodeJunctionView Grid.Column="0" JunctionType="Execute" MyNode="{Binding NodeMoel}" Width="30" Height="15"  Margin="4,0,2,0" />
@@ -42,8 +43,8 @@
           </ItemsControl.ItemTemplate>
         </ItemsControl>
       </StackPanel>
-      
-      
+
+
     </Grid>
   </Border>
-</UserControl>
+</local:NodeControlBase>