Trade-industry branch: build-menu wiring and doc accuracy

Fix core architecture drift: duplicate FACTIONS export, difficulty lists, seed dedup

Tier 2 docs: mark unreachable planet/recipe data as legacy

Fast-follow: complete the Strategic tier — AI Cores, Plasma Torpedoes, the Leviathan

Odyssey Phase 3: the Strategic tier + the endgame win (Antimatter Gate)

Odyssey: perf throttling, galaxy save/load, aggression ramp, cleanups

First playable slice: 1v1 skirmish vs scripted AI on Ferros Prime

Seed repo: shared universe data + real-time loop bootstrap