[功能] 可定时发送,支持设置某个模型是否通过代理进行传输

Confirmation before submission

• I have read the existing feature documentation and confirmed that it is not already available.
• I have searched the existing issues and confirmed that there are no duplicate suggestions.
• I have hidden sensitive information such as API keys, tokens, and cookies in screenshots and logs. I tried to add these features, but they may have introduced a bug that causes a black box to pop up, even though it was eventually fixed, I cannot guarantee that the added features do not cause other bugs, and I should not be able to handle the modification work on this complex project.