feat: voyage modules — Spacecraft, Brachistochrone, MissionPlanner (proposal / no obligation)#92

Draft

tymrtn wants to merge 3 commits intotyppo:masterfrom

tymrtn:voyage-modules

Commits on May 6, 2026

feat(Brachistochrone): add lead-angle rendezvous solver

tymrtn
and
claude
committed
feat(Spacecraft): add drive spec, mass tracking, and propellant accounting

tymrtn
and
claude
committed
feat(MissionPlanner): multi-leg mission orchestrator + ES3 fixes

tymrtn
and
claude
committed