Tencent/mars ? reverse-engineered prompt

Build me a simple cross platform networking and logging toolkit based on this Mars project, with a small sample app that shows how to start it up and use it on mobile.

I want the sample to make it easy to see how to initialize logging, send and receive network messages, handle app foreground and background changes, and reconnect when the network changes. Please include a clean demo for Android and iPhone if possible, and make sure the logging part saves files safely and can be turned on or off for debug and release. If there are any setup steps or current docs that need checking, look them up online and keep the instructions in the app or README easy to follow.

The end result should feel like a working starter kit for someone who wants reliable network communication and logs in a real app, not just a library dump.