- Add Sheet UI component and StageDetailSheet with config/activity tabs
- Stage config opens in right-side sheet (always-editable, no collapsed summary)
- Replace JSON textarea in routing rules with structured PredicateBuilder form
- Remove StageTransitionsEditor from UI (transitions auto-managed)
- Promote Stage Management section to immediately after flowchart
- Conditionally hide Routing Rules (single track) and Award Governance (no awards)
- Add section headers with descriptions and increase spacing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
