[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/rc-input-number/es/utils/numberUtil.d.ts

@@ -0,0 +1 @@
+export declare function getDecupleSteps(step: string | number): string;

frontend/node_modules/rc-input-number/es/utils/numberUtil.js

@@ -0,0 +1,9 @@
+import { trimNumber, num2str } from '@rc-component/mini-decimal';
+export function getDecupleSteps(step) {
+  var stepStr = typeof step === 'number' ? num2str(step) : trimNumber(step).fullStr;
+  var hasPoint = stepStr.includes('.');
+  if (!hasPoint) {
+    return step + '0';
+  }
+  return trimNumber(stepStr.replace(/(\d)\.(\d)/g, '$1$2.')).fullStr;
+}