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/graph/hooks.ts

@@ -58,14 +58,12 @@ export const useGraphCanvas = (readonly: boolean = false): UseGraphCanvas => {
     if (graph.value) {
       clearGraph();
 
-      // 等待 Vue 完成卸载
-      nextTick(() => {
-        graph.value?.dispose();     // 销毁 Graph 实例
-        graph.value = null;
-        if (container.value) {
-          container.value.innerHTML = ''; // 清空容器内容
-        }
-      });
+      // 同步销毁 Graph 实例，避免异步导致的竞态条件
+      graph.value.dispose();
+      graph.value = null;
+      if (container.value) {
+        container.value.innerHTML = ''; // 清空容器内容
+      }
     } else if (container.value) {
       container.value.innerHTML = '';
     }
@@ -222,7 +220,8 @@ export const useGraphCanvas = (readonly: boolean = false): UseGraphCanvas => {
 
     // 监听节点选中事件
     graph.value.on('node:selected', ({ node }) => {
-      console.info('node select', node);
+      console.info('node select', node,node.getData());
+      
       emitGraphEvent('node:selected', node);
     });