添加视频循环模式和下载功能，优化页面元数据和样式

app/aweme/[awemeId]/page.tsx

@@ -1,6 +1,7 @@
 import { prisma } from "@/lib/prisma";
 import BackButton from "@/app/components/BackButton";
 import AwemeDetailClient from "./Client";
+import type { Metadata } from "next";
 
 function ms(v?: number | null) {
   if (!v) return "";
@@ -10,6 +11,37 @@ function ms(v?: number | null) {
   return `${m}:${r.toString().padStart(2, "0")}`;
 }
 
+export async function generateMetadata({ params }: { params: Promise<{ awemeId: string }> }): Promise<Metadata> {
+  const id = (await params).awemeId;
+
+  const [video, post] = await Promise.all([
+    prisma.video.findUnique({
+      where: { aweme_id: id },
+      select: { desc: true, author: { select: { nickname: true } } },
+    }),
+    prisma.imagePost.findUnique({
+      where: { aweme_id: id },
+      select: { desc: true, author: { select: { nickname: true } } },
+    })
+  ]);
+
+  const data = video || post;
+  if (!data) {
+    return {
+      title: "作品不存在",
+    };
+  }
+
+  const desc = data.desc || "查看作品详情";
+  const author = data.author.nickname;
+  const title = desc.length > 50 ? `${desc.slice(0, 50)}... - ${author}` : `${desc} - ${author}`;
+
+  return {
+    title,
+    description: desc,
+  };
+}
+
 export default async function AwemeDetail({ params }: { params: Promise<{ awemeId: string }> }) {
   const id = (await params).awemeId;