👑[Enhancement] 希望增加指定代理服务器的选项

### 🥰 需求描述(Description)

本人有香港服务器，可以通过http/socks5来通过服务器获得更稳定的加速。
但是软件默认不使用系统代理，希望可以增加指定代理的选项。

Start by locating the app’s network and proxy configuration entry points; the issue does not name files or tests. Compare the requested behavior with the existing handling of system proxies, then determine where an explicit HTTP or SOCKS5 proxy option belongs. Done means users can specify either proxy type for the acceleration traffic described in the issue.

Written by the indexing model from the issue text.