feat: improve application access and money precision

src/utils/currency.ts

@@ -1,14 +1,32 @@
+export const MONEY_UNITS_PER_YUAN = 10_000;
+
 export function formatAmount(value: number) {
   return value.toLocaleString('zh-CN', {
-    minimumFractionDigits: 3,
-    maximumFractionDigits: 3,
+    minimumFractionDigits: 4,
+    maximumFractionDigits: 4,
   });
 }
 
 export function formatCents(cents?: number | null) {
-  return formatAmount((cents ?? 0) / 100);
+  return formatAmount((cents ?? 0) / MONEY_UNITS_PER_YUAN);
 }
 
 export function formatYuan(cents?: number | null) {
   return `¥${formatCents(cents)}`;
 }
+
+export function yuanToMoneyUnits(value: number | string | null | undefined) {
+  const amount = typeof value === 'string' ? Number(value) : (value ?? 0);
+  return Math.round(amount * MONEY_UNITS_PER_YUAN);
+}
+
+export function isValidMoneyInput(value: string, options: { allowNegative?: boolean; allowZero?: boolean } = {}) {
+  const normalized = value.trim();
+  const pattern = options.allowNegative ? /^-?\d+(?:\.\d{1,4})?$/ : /^\d+(?:\.\d{1,4})?$/;
+  if (!pattern.test(normalized)) return false;
+  return options.allowZero !== false || Number(normalized) !== 0;
+}
+
+export function moneyUnitsToYuan(value?: number | null) {
+  return (value ?? 0) / MONEY_UNITS_PER_YUAN;
+}