Model:
- Drop `requires` from ProgramSpec; requires is now deployment-only.
Collapse Requirement to {ref, bind} with kind defaulting to "deployment"
(drop the unused `version`). System-package preconditions stay on the
program as `system_dependencies`, synthesized into {kind: system} for the
functional check. relations.py/deploy.py read only the deployment's requires.
- create.py seeds a stack's substrate dependency onto the deployment, not the
program. Docs + tests updated.
UI:
- Add a `requires` editor (useRequires) on service, job, and static detail
pages — edit service→service deps (ref + optional bind env var).
- Restore the gateway route table "Open" column: a kind-aware in-app link to
each route's deployment.
- Reformat the reach control: name baked into each option
(localhost:PORT (local) / <name>.<domain> (internal) / <name>.<pubdomain> (public)).
- Services page: sort statics in with systemd services by name, add a
search + kind-filter bar mirroring the programs page.