- Add enginePaused field to Settings type with soft-pause semantics (drain queue, don't kill agents)
- Gate scheduler, triage, auto-merge, and periodic merge retry on enginePaused
- Add Pause and Stop buttons to dashboard Header replacing single toggle
- Wire enginePaused state through App with optimistic toggle and unpause resume logic
- Add tests for scheduler, triage, dashboard CLI, Header, and App covering pause behavior
- Add globalPause setting to core Settings type with default false
- Guard scheduler, triage, and auto-merge queue to skip work when globalPause is active
- Add pause/play toggle button in dashboard Header with optimistic UI and rollback on failure
- Add tests for scheduler, triage, Header, and App global pause behavior
- Include minor changeset for the new feature
- Add initialSection prop to SettingsModal to allow opening to a specific tab
- Export SectionId type from SettingsModal for use by parent components
- Check auth status on App mount and auto-open Settings to Authentication tab when all providers are unauthenticated
- Reset initialSection on modal close so subsequent manual opens default to General
- Add comprehensive tests for auto-open behavior and initialSection prop
