Get post detail | 获取帖子详情

{
    "code": 20000,
    "data": {
        "category_id": 1,
        "category_name": "技术讨论",
        "content": "## 技术分享\n这是内容",
        "created_at": "2024-01-01 00:00:00",
        "dislike_count": 2,
        "favorite_count": 10,
        "id": 1,
        "is_essence": true,
        "is_pinned": false,
        "like_count": 25,
        "pin_scope": "None",
        "publish_ip": "192.168.1.1",
        "read_permission_points": 0,
        "read_permission_type": "public",
        "status": "Normal",
        "title": "技术分享帖",
        "updated_at": "2024-01-01 00:00:00",
        "user_id": 1,
        "username": "testuser",
        "view_count": 150
    },
    "err_code": "string",
    "msg": null
}