I'm running Proxmox in my homelab. Although it's based on Debian, it doesn't lend itself to running tasks other than Proxmox itself. I, for one, would appreciate a KVM manager with web UI (Portainer for KVM, if you may) - but I'm reluctant to run something so vibe-coded.

Check out Incus: https://linuxcontainers.org/incus/

I'm kinda confused here because Proxmox is a KVM manager with a web UI (and LXC containers).