Eliminates the three operational pain points hit in the last
owner-rename incident:
1. Owner-rename drift across 14 repos
- npmrc.template now uses ${GITEA_NPM_OWNER:-learning_ai_user}
- switch-network.sh exports GITEA_NPM_OWNER on shell start
- Future renames are a one-line env change, not 14 git commits
2. Stale shell-env tokens (file rotated, env didn't)
- scripts/gitea/token.sh: status|print|validate|rotate subcommands
- 'eval "$(bash scripts/gitea/token.sh print --export)"' refreshes
any shell without re-sourcing ~/.zshrc
- rotate uses Gitea API + macOS Keychain for admin creds
3. No pre-deploy validation
- scripts/gitea/doctor.sh: NETWORK + DNS + token consistency +
registry HTTP 200 + optional package@version probe
- Run before any deploy that needs @bytelyst/* from Gitea
