lengmo23/Gostapi_forward ? reverse-engineered prompt

Build me a simple one click forwarding tool based on GOST v3 API.

I want a shell script that can set up the GOST environment, start it, and let me manage forwarding rules from a web based interface. It should support basic TCP and UDP forwarding, and also support GOST Relay so multiple forwarding paths can share one port. I want to be able to add or change rules through the API without interrupting existing connections, and I’d like to see real time traffic stats for each port.

Please also include LeastPing load balancing support if possible, even if it has to work through an external setup. Make the script easy to run on a fresh server, with clear prompts and sensible defaults. If you need to check current GOST API details online, go ahead and do that. I mainly want something practical that I can run once and then manage forwarding with as little manual work as possible.