Render policy markdown and normalize filing links

src/components/site-footer.tsx

@@ -11,10 +11,35 @@ const footerLinks = [
   { href: '/help', label: '帮助中心' },
 ];
 
+function normalizeExternalHref(value: string): string {
+  const href = value.trim();
+  if (!href) return '';
+  if (/^https?:\/\//i.test(href)) return href;
+  return `https://${href}`;
+}
+
+function resolveFilingHref(filingInfo: string, configuredUrl: string): string {
+  if (!filingInfo.trim()) return '';
+  return normalizeExternalHref(configuredUrl) || 'https://beian.miit.gov.cn/';
+}
+
+function resolvePublicSecurityFilingHref(filingInfo: string, configuredUrl: string): string {
+  if (!filingInfo.trim()) return '';
+  const normalized = normalizeExternalHref(configuredUrl);
+  if (normalized) return normalized;
+  const code = filingInfo.match(/\d{13,}/)?.[0];
+  return code
+    ? `https://beian.mps.gov.cn/#/query/webSearch?code=${code}`
+    : 'https://beian.mps.gov.cn/#/query/webSearch';
+}
+
 export function SiteFooter() {
   const { config } = useSiteConfig();
-  const filingHref = config.filingUrl.trim();
-  const publicSecurityFilingHref = config.publicSecurityFilingUrl.trim();
+  const filingHref = resolveFilingHref(config.filingInfo, config.filingUrl);
+  const publicSecurityFilingHref = resolvePublicSecurityFilingHref(
+    config.publicSecurityFilingInfo,
+    config.publicSecurityFilingUrl,
+  );
 
   return (
     <footer className="border-t border-border/50 py-12">

src/components/site-policy-page.tsx

@@ -1,6 +1,8 @@
 'use client';
 
 import Link from 'next/link';
+import ReactMarkdown from 'react-markdown';
+import remarkGfm from 'remark-gfm';
 import { Button } from '@/components/ui/button';
 import { SiteLogo, SiteName } from '@/components/site-brand';
 import { useSiteConfig } from '@/lib/site-config';
@@ -34,8 +36,10 @@ export function SitePolicyPage({ kind }: { kind: PolicyPageKind }) {
 
         <article className="flex-1">
           <h1 className="font-serif text-3xl font-bold tracking-tight sm:text-4xl">{meta.title}</h1>
-          <div className="mt-8 whitespace-pre-wrap break-words rounded-lg border border-border bg-card p-5 text-sm leading-8 text-muted-foreground sm:p-7">
-            {content}
+          <div className="announcement-markdown mt-8 break-words rounded-lg border border-border bg-card p-5 text-sm leading-8 text-muted-foreground sm:p-7">
+            <ReactMarkdown remarkPlugins={[remarkGfm]}>
+              {content}
+            </ReactMarkdown>
           </div>
         </article>
       </div>