轮播图列表（可获取指定位置）

{
    "code": 0,
    "message": "success",
    "data": {
        "list": [
            {
                "id": 1,
                "title": "五月活动上线",
                "image": "https://oss.example.com/banner/2026/0508/banner1.jpg",
                "link_type": 1,
                "link_value": "https://example.com/activity/may"
            },
            {
                "id": 2,
                "title": "热门资讯推荐",
                "image": "https://oss.example.com/banner/2026/0508/banner2.jpg",
                "link_type": 2,
                "link_value": "42"
            },
            {
                "id": 3,
                "title": "品牌宣传",
                "image": "https://oss.example.com/banner/2026/0508/banner3.jpg",
                "link_type": 0,
                "link_value": ""
            }
        ]
    }
}