添加反向树加载功能，重构节点和树的选择逻辑

Co-authored-by: Copilot <copilot@github.com>

modeler/src/views/decision/designer/node.vue

@@ -18,7 +18,7 @@
           </a-space>
         </template>
 
-        <div class="port port-in"  data-port="in-0" magnet="passive">
+        <div class="port port-in" data-port="in-0" port="in-0" magnet="passive">
           <div class="triangle-left"></div>
         </div>
         <div class="w-full ks-designer-node-text">
@@ -31,7 +31,7 @@
             </p>
           </a-tooltip>
         </div>
-        <div class="port port-out" data-port="out-0" magnet="active">
+        <div class="port port-out" data-port="out-0" port="out-0" magnet="active">
           <div class="triangle-right" ></div>
         </div>
       </a-card>