release: v0.2.1 — bug修复、代码去重、功能增强、覆盖率88.57%

src/i18n.ts

@@ -1,7 +1,7 @@
 /**
  * MetonaToast i18n — 国际化管理
  * @module i18n
- * @version 0.2.0
+ * @version 0.2.1
  */
 
 import { LOCALES } from './constants.js';
@@ -503,10 +503,18 @@ export const formatRelativeTime = (date: Date | number | string, options: Intl.R
 };
 
 /**
- * 格式化列表
+ * 格式化列表 — 优先使用 Intl.ListFormat，降级到逗号拼接
  */
 export const formatList = (list: string[], _options: Record<string, unknown> = {}): string => {
-  // Intl.ListFormat requires ES2021+; fallback to comma join for wider compat
+  const intl = Intl as typeof Intl & { ListFormat?: new (locale: string, options?: Record<string, unknown>) => { format: (items: string[]) => string } };
+  if (typeof intl.ListFormat === 'function') {
+    try {
+      return new intl.ListFormat(currentLocale, {
+        style: 'long',
+        type: 'conjunction',
+      }).format(list);
+    } catch (_e) { /* fallback below */ }
+  }
   return list.join(', ');
 };