Merges PLAN.md (Phases A-F), PLAN_REFACTOR.md (Phases 1-8), plan.md (GMSH),
docs/rfcs/0001, and visual-audit-report findings into a single prioritized roadmap.
10 priorities with dependency graph and 'what to do next' decision options.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>