Port the standalone lab dashboard (lab.lthn.io) into the core CLI as
pkg/lab/ with collectors, handlers, and HTML templates. The dashboard
monitors machines, Docker containers, Forgejo, HuggingFace models,
training runs, and InfluxDB metrics with SSE live updates.
New command: core lab serve --bind :8080
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
