cmdPhaseComplete updated Status and Completed columns in the progress
table but skipped the Plans Complete column and plan-level checkboxes.
If update-plan-progress was missed for any plan, the phase completion
safety net didn't catch it, leaving ROADMAP.md inconsistent.
Fixes#1446
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>