[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/@rc-component/mini-decimal/lib/MiniDecimal.d.ts

@@ -0,0 +1,11 @@
+import BigIntDecimal from './BigIntDecimal';
+import NumberDecimal from './NumberDecimal';
+import type { DecimalClass, ValueType } from './interface';
+export { NumberDecimal, BigIntDecimal };
+export type { DecimalClass, ValueType };
+export default function getMiniDecimal(value: ValueType): DecimalClass;
+/**
+ * Align the logic of toFixed to around like 1.5 => 2.
+ * If set `cutOnly`, will just remove the over decimal part.
+ */
+export declare function toFixed(numStr: string, separatorStr: string, precision?: number, cutOnly?: boolean): any;