Replaces per-step Finish & Next with a context-aware milestone-advance
button cycling Mark Job Done → Issue Certs → Schedule Delivery →
Mark Shipped. Architecture, cascade, gates, files-touched, and the
cert-gate hard-block decision are all captured for implementation
planning.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
