nx_game_render_gate.nx

nx_game_render_gate.nx -- GATE: the GAME loop closed. Teach a temp catalog the game emitters, RUN the level through the deterministic spec->runtime, and assert: the world is built from the catalog (coins/foes/exit/ tilemap), the mechanic PHYSICS is consumed (two different gravities -> two different jump apexes = not a hardcode), the traversal actually PLAYS (every declared coin collected, every patroller cleared, damage = foes*hp, exit reached), GROW->consume (a newly-taught level plays with NO code change), a NEGATIVE CONTROL (an unknown level id REFUSES instead of fabricating a run), and SOVEREIGNTY (the transcript carries 0 third-party JS and the detector still FIRES on a planted tag). Emits a preview to knowledge/staging/game/run_1-1.txt. license_tier: ORIGINAL