Introduce the modular post-install structure chosen for reconciling 'one
source of truth' with 'run just the service I want':
- lib/common.sh: shared helpers (logging, prompts, ownership, Caddy wiring) and
a service registry. Single implementation of each helper.
- setup.sh: dispatcher — interactive menu, run-one (./setup.sh <name>), --list,
--dry-run, --unattended. Sources lib + services/*.sh (self-registering).
- services/base.sh: essential CLI packages incl. glow (Charm apt repo).
- services/homeassistant.sh: first migrated service (bridge/host networking,
trusted_proxies, Caddy integration).
- MODULAR.md: architecture, how to add a module, migration status.
- Groups: base/homelab/gaming/backup. Gaming group makes this a base for
homelab OR gaming boxes.
Also add glow as a default app to the live -crowdsec scripts' essential
packages so it's installed today regardless of entry point.
Verified: bash -n on all new files; ./setup.sh --list groups services;
dry-run run-one routes correctly.
https://claude.ai/code/session_017eA2qqq9jfF2tNtpUYL8vK
