获取热门帖子

{
    "code": 20000,
    "data": {
        "posts": [
            {
                "avatar": "https://example.com/avatar.png",
                "category_name": "技术讨论",
                "comment_count": 25,
                "created_at": "2024-01-01T00:00:00Z",
                "id": 1,
                "like_count": 50,
                "title": "技术分享帖",
                "username": "testuser",
                "view_count": 1500
            }
        ]
    },
    "msg": null
}