解决沉浸式翻译使用 /v1/translate端点时传入多余cookie导致dl_session错误设置的问题

[luzov]

沉浸式翻译会传入请求头：

Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Content-Length: 60
Cookie: psession=327fdbc7-c5e6-4df6-92c7-43b1781683b0
Host: "127.0.0.1:11888"
Origin: "chrome-extension://bpoadfkcbjbfhfodiogcnhhhpibjhbnh"
Proxy-Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
content-type: application/json

之前的cookie读取方式会导致dl_session错误变更导致503