Implemented trailboss CLI with jump-next and skip commands that
navigate to panes returned by the daemon's /next endpoint.
- bin/trailboss: main CLI with jump-next, skip, popup stubs
- jump-next: queries /next, navigates via switch-client/select-window/select-pane
- skip: POSTs /skip, then jumps to new head
- test-navigation.sh: synthetic event test verifying exit criterion
Exit criterion passed: jump-next lands operator on pane returned by /next.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
