Panels are shown on the stage beside the timeline (ui_ai_side.js), so they
stay in view however many steps follow; the timeline keeps one line per
panel that brings it there. The stage follows the newest panel until the
user goes back to another (pager or a panel's line). Too narrow for three
columns, the timeline and the stage become two tabs; a panel that asks
brings the stage forward. The task list can be folded away. What a step
made moves to ui_ai_results.js; the toast goes once the workbench opens.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
