ca5931e8c4
When treeData is initially an empty array (e.g. before async data arrives), updateTreeValue() would clear the modelValue because no matching items could be found in the empty flattened data. This caused default values to be lost. Only call updateTreeValue() when flattenData has items, so that modelValue is preserved until the actual tree data arrives. Fixes #6522
@vben-core
系统一些比较基础的SDK和UI组件库，该目录后续完善后，可能会迁移出去或者发布到npm，请勿将任何业务逻辑和业务包放在该目录。