The cockpit control loop should keep rendering intents without launching work, while selected-lane actions need a bounded runner for files, diff, locks, sync, finish, pane focus, close, copy path, and editor open. This adds that runner and explicit control wrappers without replacing the current TUI reducer.

Constraint: Existing control-loop tests require menu selection to emit intents, not launch agents directly.

Rejected: Reuse stale worktree control.js wholesale | it deleted the current TUI control loop from PR #482.

Confidence: high

Scope-risk: moderate

Directive: Keep close limited to tmux pane cleanup; do not delete branch/worktree/session metadata from that action.

Tested: node --test test/cockpit-action-runner.test.js test/cockpit-control.test.js

Not-tested: Manual tmux cockpit interaction