Phase 124-P4: - Add fixture: apps/tests/phase124_if_only_return_var_min.hako - local x; x = 7; print(x); return x - Expected output: 7 (print), RC: 7 (return x) - Add smoke: tools/smokes/v2/profiles/integration/apps/phase124_if_only_return_var_vm.sh - NYASH_JOINIR_DEV=1 HAKO_JOINIR_STRICT=1 for dev-only features - Accept exit code 7 (return x where x=7) as valid - Verify all Phase 121/123/118 smokes still PASS