Phases listed in ROADMAP.md but not yet planned (no directory on disk)
were excluded from total_phases, causing premature milestone completion.
Now uses Math.max(diskDirs, roadmapCount) via filter.phaseCount.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Extract getMilestonePhaseFilter() from milestone.cjs closure into core.cjs
as a shared helper. Apply it in buildStateFrontmatter and cmdPhaseComplete
so multi-milestone projects count only current milestone's phases instead
of all directories on disk.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>