fix: 修复bug

src/modules/ai-search/MindMapping.vue

@@ -451,14 +451,15 @@ const getNodeSide = (node_data, parent_data) => {
   return parent_position_x > node_position_x ? 'left' : 'right';
 };
 
+let mindmap = null;
 // 初始化图表
 const initGraph = (data) => {
-  if (graph) {
-    graph.destroy(); // 如果存在现有图表，则销毁
+  if (mindmap) {
+    mindmap.destroy(); // 如果存在现有图表，则销毁
   }
 
   const root_id = data.id;
-  const graph = new Graph({
+  mindmap = new Graph({
     container: container.value,
     width: container.value?.clientWidth || 1000, // 画布宽度，默认值800
     height: container.value?.clientHeight || 800, // 画布高度，默认值600
@@ -511,11 +512,11 @@ const initGraph = (data) => {
     }
   });
 
-  graph.once(GraphEvent.AFTER_RENDER, () => {
-    graph.fitView();
+  mindmap.once(GraphEvent.AFTER_RENDER, () => {
+    mindmap.fitView();
   });
 
-  graph.render();
+  mindmap.render();
 };
 </script>