From the paste, it's pretty obvious that they're using Linux with a custom llama.cpp fork. The Framework Desktop uses the AMD Strix Halo chipset, which is a unified memory system with an integrated GPU. I think that it goes for around $3000 in these inflated times.
https://pastebin.com/bBXbpDyu
Here's the chat template I use:
https://huggingface.co/froggeric/Qwen-Fixed-Chat-Templates