- Change nav open and open-wait to avoid activating newly created tabs unless
--focus is explicitly requested.
- Send background=true for default opens so older or remote extensions also
avoid stealing focus even if they ignore the new focus flag.
- Remove the redundant --bg flag from navigation and search CLI commands now
that no-focus/background behavior is the default.
- Thread focus support through the sync SDK, async SDK, tab helpers, and
workflow decorators.
- Update README and demo usage to document the new default and --focus opt-in.
- Bump package and extension metadata to 0.12.3.
- Add regression coverage for CLI help, wire payloads, and extension behavior.
daniel156161
