修改了判断空库位，查询语句的bug,和摄像头的连接

zyh

2026-01-04 c47395fe29493062a3f0bc2cf1d02a2946b20b88

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{
  "code": 0,
  "msg": "",
  "data": {
    "src": "https://wx2.sinaimg.cn/mw690/5db11ff4gy1fmx4kec5bvj20eb0h3mxh.jpg"
  }
}