Merge origin/main into pr/6 — keep pr/6 refactor (openenv, env, no legacy engine)

feat(ui): update Fold3DCanvas, RewardPanel, InfoBadges and rebuild assets

feat(frontend): replay mode, camera angle fix, endpoint alignment

refactor(app): update App and StepFeed for new fold/metrics schema

fix-spaces (#4)

iana (#1)

Duplicate from static-templates/react