feat: 添加货币管理功能，更新国际化支持，移除报表相关代码

src/lib/money.ts

@@ -1,8 +1,35 @@
+import { getCachedAdminCurrencies } from "@/hooks/use-admin-currency-catalog";
+
+const DEFAULT_DECIMAL_PLACES = 2;
+
+export function getAdminCurrencyDecimalPlaces(currencyCode: string | null | undefined): number {
+  const code = currencyCode?.trim().toUpperCase();
+  if (!code) {
+    return DEFAULT_DECIMAL_PLACES;
+  }
+
+  const row = getCachedAdminCurrencies().find((item) => item.code === code);
+  const decimals = row?.decimal_places;
+  if (typeof decimals === "number" && Number.isFinite(decimals) && decimals >= 0) {
+    return decimals;
+  }
+
+  return DEFAULT_DECIMAL_PLACES;
+}
+
 /** 后台列表统一：最小货币单位 → 主货币展示（默认 2 位小数，与钱包一致） */
-export function formatAdminMinorUnits(minor: number, currencyCode = "NPR"): string {
-  const major = minor / 100;
+export function formatAdminMinorUnits(
+  minor: number,
+  currencyCode = "NPR",
+  decimalPlaces?: number,
+): string {
+  const resolvedDecimalPlaces =
+    typeof decimalPlaces === "number" && Number.isFinite(decimalPlaces) && decimalPlaces >= 0
+      ? decimalPlaces
+      : getAdminCurrencyDecimalPlaces(currencyCode);
+  const major = minor / 10 ** resolvedDecimalPlaces;
   return `${currencyCode} ${major.toLocaleString(undefined, {
-    minimumFractionDigits: 2,
-    maximumFractionDigits: 2,
+    minimumFractionDigits: resolvedDecimalPlaces,
+    maximumFractionDigits: resolvedDecimalPlaces,
   })}`;
 }