fix: map language code in updateDetailPage

src/pages/UpdateDetailPage.tsx

@@ -44,7 +44,7 @@ const UpdateDetailPage: React.FC = () => {
         
         try {
           // 尝试加载 Markdown 文件
-          const mdPath = `/data/${i18n.language}/updates/${year}/${foundUpdate.id}.md`;
+          const mdPath = `/data/${getMarkdownLanguage(i18n.language)}/updates/${year}/${foundUpdate.id}.md`;
           const response = await fetch(mdPath);
           
           // 检查响应状态和内容类型
@@ -75,6 +75,19 @@ const UpdateDetailPage: React.FC = () => {
     fetchUpdateData();
   }, [id, i18n.language, allUpdates]);
 
+  // Map i18n language codes to markdown file path language codes
+  const getMarkdownLanguage = (language: string): string => {
+    const languageMap: Record<string, string> = {
+      'en-US': 'en',
+      'zh-CN': 'zh-Hans',
+      'zh-TW': 'zh-Hant',
+      'en': 'en',
+      'zh-Hans': 'zh-Hans',
+      'zh-Hant': 'zh-Hant'
+    };
+    return languageMap[language] || 'en';  // Default to 'en' if mapping not found
+  };
+
   if (isLoading) {
     return (
       <div className="min-h-screen flex items-center justify-center">