[update 拆分排序] 调整拖拽到内部，传最底层的最后一个节点的序号

src/views/documentTool/documentSplit/DocumentSplitDetail.vue

@@ -406,9 +406,15 @@ export default {
       const targetId = info.node.eventKey
       // 序号，拖拽到节点里面，就把序号设置成最后一个节点的序号
       let displaySeq = info.node.dataRef.displaySeq
-      const children = info.node.dataRef.children || []
+      let children = info.node.dataRef.children || []
+      // 递归拿到最内层的最后一个节点的序号
+      while (true) {
         if (children && children.length) {
           displaySeq = children[children.length - 1].displaySeq
+          children = children[children.length - 1].children || []
+        } else {
+          break
+        }
       }
       this.treeNodeSort({ sourceId, targetId, displaySeq })
     },

src/views/documentTool/documentSplit/modules/SplitTreeOrderModal.vue

@@ -134,12 +134,19 @@ export default {
       const targetId = info.node.eventKey
       // 序号，拖拽到节点里面，就把序号设置成最后一个节点的序号
       let displaySeq = info.node.dataRef.displaySeq
-      const children = info.node.dataRef.children || []
+      let children = info.node.dataRef.children || []
+      // 递归拿到最内层的最后一个节点的序号
+      while (true) {
         if (children && children.length) {
           displaySeq = children[children.length - 1].displaySeq
+          children = children[children.length - 1].children || []
+        } else {
+          break
+        }
       }
       this.treeNodeSort({ sourceId, targetId, displaySeq })
     },
+
     // 发请求
     treeNodeSort (params) {
       this.confirmLoading = true