fix: 修复收入合同新增项目节序号错误的问题

src/store/mobx/contract/index.ts

@@ -59,9 +59,9 @@ function lookupNode(id: string, tree: iIncomeTree[]) {
 
     if (item.id === id) {
       if (Array.isArray(item.children)) {
-      item.children.push({ ...initData[0], isEdit: true, code: item.code + `-${item.children.length || 1 }`, parentId: item.id, bidsectionId: item.bidsectionId })
+        item.children.push({ ...initData[0], isEdit: true, code: item.code + `-${item.children.length + 1 }`, parentId: item.id, bidsectionId: item.bidsectionId })
       } else {
-      item.children = [ { ...initData[0], isEdit: true, code: item.code + '-1', parentId: item.id, bidsectionId: item.bidsectionId } ]
+        item.children = [ { ...initData[0], isEdit: true, code: item.code + '-1', parentId: item.id, bidsectionId: item.bidsectionId } ]
       }
       return item
     } else if(item.children && item.children.length) {