添加视频循环模式和下载功能，优化页面元数据和样式

app/page.tsx

@@ -1,6 +1,12 @@
 import { prisma } from "@/lib/prisma";
 import FeedMasonry from "./components/FeedMasonry";
 import type { FeedItem } from "./types/feed";
+import type { Metadata } from "next";
+
+export const metadata: Metadata = {
+  title: "作品集 - 抖歪",
+  description: "抖歪作品集，记录当下时代的精彩瞬间",
+};
 
 export default async function Home() {
   const [videos, posts] = await Promise.all([