Introduce interactive rocket consoles and launch readiness checks: consoles are part of interior geometry, can be activated by the character, and the UI shows console progress and launch readiness. Gate launches until all consoles are online. Add reset-progress action and save.clearProgress.

Stability and polish: implement a fixed timestep loop, make physics ignore marked shell boxes when inside rocket, add options to physics.addStatic, fix particle opacity/lifetime accounting, improve renderer disposal and named imports for three.js, enhance launch altitude/staging logic, and add hangar templates/stage configuration. Miscellaneous small UI and character improvements (console activation, deck naming, interaction handling).