feat: 获取文章详情，返回描述

apps/backend/src/blog/blog.controller.ts

@@ -61,6 +61,7 @@ export class BlogController {
     return {
       id: blog.id,
       title: blog.title,
+      description: blog.description,
       createdAt: blog.createdAt,
       content: blogContent,
     };