feat: 接入预览模式（Next.js Draft Mode）

app/page.tsx

@@ -1,13 +1,19 @@
 import type { Metadata } from "next";
 import { getHomePage } from "@/services/page.service";
+import { getPreviewOrFallback } from "@/services/preview.service";
 import { BlockRenderer } from "@/blocks/BlockRenderer";
+import type { HomePageDetail } from "@/types/wagtail";
 
 export const metadata: Metadata = {
   title: "首页",
 };
 
 export default async function Home() {
-  const homePage = await getHomePage().catch(() => null);
+  const homePage = await getPreviewOrFallback<HomePageDetail>(
+    "home.homepage",
+    "body,seo_title_override,seo_description_override",
+    () => getHomePage().catch(() => null),
+  );
 
   if (!homePage) {
     return (