A fresh checkout had no working path to the stack locally. Neither compose
file carries a `build:` for backend or frontend -- each ships as its own
registry image -- so with no image present `make dev-up` fell through to
pulling the `:local` tag, which nothing publishes, and failed with 403
against a registry a laptop has no login for.
`install` builds both images from backend/Dockerfile and frontend/Dockerfile
under exactly the tag the compose files default to; `up` verifies they exist
and says what to run instead of retrying the pull. Image names are read back
from `docker compose config --images` rather than restated here, so an org
rename cannot leave this file building a tag nothing runs.
infra's dev-up/dev-down now set COMPOSE_PROJECT_NAME=thermograph-dev, which
matches deploy/deploy-dev.sh and what the root CLAUDE.md already described;
a local run previously landed in the prod-shaped `thermograph` project. Drop
dev-up's `--build`, a no-op since the Dockerfiles moved out of infra, and
correct the comment claiming a 0.0.0.0 default -- the overlay has published
on loopback since dev moved to a public VPS.
