[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/@rc-component/mini-decimal/README.md

@@ -0,0 +1,21 @@
+# @rc-component/mini-decimal
+
+React 18 supported Portal Component.
+
+[![NPM version][npm-image]][npm-url] [![dumi](https://img.shields.io/badge/docs%20by-dumi-blue?style=flat-square)](https://github.com/umijs/dumi) [![build status][github-actions-image]][github-actions-url] [![Codecov][codecov-image]][codecov-url] [![npm download][download-image]][download-url]
+
+[npm-image]: http://img.shields.io/npm/v/@rc-component/mini-decimal.svg?style=flat-square
+[npm-url]: http://npmjs.org/package/@rc-component/mini-decimal
+[github-actions-image]: https://github.com/react-component/mini-decimal/workflows/CI/badge.svg
+[github-actions-url]: https://github.com/react-component/mini-decimal/actions
+[codecov-image]: https://img.shields.io/codecov/c/github/react-component/mini-decimal/master.svg?style=flat-square
+[codecov-url]: https://codecov.io/gh/react-component/mini-decimal/branch/master
+[download-image]: https://img.shields.io/npm/dm/@rc-component/mini-decimal.svg?style=flat-square
+[download-url]: https://npmjs.org/package/@rc-component/mini-decimal
+
+## Development
+
+```bash
+npm install
+npm test
+```