feat: 新增隐私政策页面，Footer增加链接

app/privacy-policy/page.tsx

@@ -0,0 +1,27 @@
+import { notFound } from "next/navigation";
+import type { Metadata } from "next";
+import { getSimpleContentPageBySlug } from "@/services/legal.service";
+
+export async function generateMetadata(): Promise<Metadata> {
+  const page = await getSimpleContentPageBySlug("privacy-policy").catch(() => null);
+  return { title: page?.title ?? "隐私政策" };
+}
+
+export default async function PrivacyPolicyPage() {
+  const page = await getSimpleContentPageBySlug("privacy-policy").catch(() => null);
+
+  if (!page) {
+    notFound();
+  }
+
+  return (
+    <article className="mx-auto max-w-3xl px-6 py-24">
+      <h1 className="mb-8 text-4xl font-bold text-slate-900">{page.title}</h1>
+      {/* page.body 为 Wagtail RichTextField 渲染出的 HTML，内容仅由后台编辑人员维护，非用户输入，可信任直接渲染 */}
+      <div
+        className="space-y-4 text-slate-700 [&_h2]:mt-8 [&_h2]:text-2xl [&_h2]:font-semibold [&_h2]:text-slate-900 [&_ul]:list-disc [&_ul]:pl-6 [&_li]:mt-1"
+        dangerouslySetInnerHTML={{ __html: page.body }}
+      />
+    </article>
+  );
+}