fix: 书库阅读页/帖子详情页/SiteDocMasthead/TOC 等前端细节修复

frontend/components/site-doc/SiteDocMasthead.tsx

@@ -1,6 +1,7 @@
 import type { ReactNode } from "react";
 import { Clock } from "lucide-react";
 import { formatDate } from "@/lib/format";
+import { formatReadingDuration } from "@/lib/toc";
 
 function formatDateTime(dateStr: string) {
   return new Date(dateStr).toLocaleString("zh-CN", {
@@ -83,9 +84,9 @@ export default function SiteDocMasthead({
         {readingMinutes != null ? (
           <span
             className="meta inline-flex items-center gap-1.5 text-[12.5px] sm:ml-auto"
-            aria-label={`阅读约需 ${readingMinutes} 分钟`}
+            aria-label={`阅读约需 ${formatReadingDuration(readingMinutes)}`}
           >
-            <Clock size={13} /> 约 {readingMinutes} 分钟读完
+            <Clock size={13} /> 约 {formatReadingDuration(readingMinutes)} 读完
           </span>
         ) : null}
       </div>