修改虚拟树组件

packages/components/tree-v2/src/tree-node.vue

@@ -10,6 +10,7 @@
     ]"
     role="treeitem"
     tabindex="-1"
+    :level="node.level"
     :aria-expanded="expanded"
     :aria-disabled="disabled"
     :aria-checked="checked"
@@ -17,6 +18,9 @@
     @click.stop="handleClick"
     @contextmenu="handleContextMenu"
   >
+    <template v-for="item in node.level" :key="item">
+      <i v-if="item - 2 > 0" :class="`line-i-${item - 2}`" />
+    </template>
     <div
       :class="ns.be('node', 'content')"
       :style="{