* refactor: remove managed/standalone mode distinction from codebase
Standalone mode is deprecated; managed mode is now the only mode.
Remove redundant "managed mode" qualifiers from comments, docs,
and error messages. Error strings now reference "database stores"
instead of "managed mode" for clarity.
* improve(onboard): streamline onboard process and env setup
Simplify onboard wizard, extract helpers to dedicated file,
update env example and entrypoint for default managed mode,
clean up prepare-env script, update i18n catalogs.
Multi-agent AI gateway with WebSocket RPC, HTTP API, and messaging channel integrations.
Go port of OpenClaw with multi-tenant PostgreSQL, per-user isolation, security hardening,
and production observability.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Thieu Nguyen