T-004: rebrand to SpaceCities

Fix the smoke job: npx --package does not do what I assumed

Boot the game in a real browser in CI — the one thing 2502 tests cannot see

Cut 1.1.0, un-deprecate the CI actions, and run the browser smoke test

Tier 1, step 1: make the static guards actually guard

Add JSDoc typedefs + // @ts-check for the core sim shapes (no build step)

Tier 5: release hygiene — docs, license, dev server, npm start

Tier 1 review fixes: save-load hardening, engine guards, UX bugs

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

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