feat: three nuxt frontends, demo seed, rounding + money-exponent + rate-cast fixes, archived specs

apps/shop-admin/composables/useMoney.ts

@@ -0,0 +1,25 @@
+import { formatMoney } from "@vmall/shared";
+import type { Currency } from "@vmall/shared";
+
+/** Currency-aware money formatter: exponents come from the API, cached app-wide. */
+export function useMoney() {
+  const { $api } = useNuxtApp();
+  const { locale } = useI18n();
+  const currencies = useState<Currency[]>("vmall.currencies", () => []);
+
+  async function load(): Promise<void> {
+    if (currencies.value.length > 0) return;
+    try {
+      currencies.value = await $api.listCurrencies();
+    } catch {
+      /* keep empty; fmt falls back to exponent 2 */
+    }
+  }
+
+  function fmt(amountMinor: number, currency: string): string {
+    const exponent = currencies.value.find((c) => c.code === currency)?.exponent ?? 2;
+    return formatMoney(amountMinor, currency, exponent, locale.value);
+  }
+
+  return { currencies, load, fmt };
+}