cc68fcf1c1
Tier 1 — quality.yml: ShellCheck on lxc-install.sh, hadolint on both Dockerfiles Tier 2 — docker-ci.yml: build images, smoke-test backend health + frontend 200 Tier 3 — test_integration.py: full stack pytest (auth, canvas save/reload, dimensions) Also adds Docker healthcheck to backend service in docker-compose.yml