feat: 接入预览模式（Next.js Draft Mode）

app/preview/disable/route.ts

@@ -0,0 +1,18 @@
+import { NextRequest, NextResponse } from "next/server";
+import { draftMode, cookies } from "next/headers";
+import {
+  PREVIEW_CONTENT_TYPE_COOKIE,
+  PREVIEW_TOKEN_COOKIE,
+} from "@/services/preview.service";
+
+/** 退出预览模式：关闭 Draft Mode 并清除预览专用 cookie，重定向回首页。 */
+export async function GET(request: NextRequest) {
+  const draft = await draftMode();
+  draft.disable();
+
+  const cookieStore = await cookies();
+  cookieStore.delete(PREVIEW_CONTENT_TYPE_COOKIE);
+  cookieStore.delete(PREVIEW_TOKEN_COOKIE);
+
+  return NextResponse.redirect(new URL("/", request.url));
+}