refactor(joinir): make jump_args layout explicit (Phase 256)

tools/smokes/v2/profiles/integration/apps/phase254_p0_index_of_vm.sh

@@ -2,13 +2,16 @@
 # Phase 254 P0: index_of 形 loop (VM backend)
 set -euo pipefail
 
+HAKORUNE_BIN="${HAKORUNE_BIN:-./target/release/hakorune}"
 HAKO_PATH="apps/tests/phase254_p0_index_of_min.hako"
 
 # Test: "abc".index_of("b") → 1
 EXPECTED_EXIT=1
 
+set +e
 $HAKORUNE_BIN --backend vm "$HAKO_PATH"
 actual_exit=$?
+set -e
 
 if [[ $actual_exit -eq $EXPECTED_EXIT ]]; then
     echo "✅ phase254_p0_index_of_vm: PASS (exit=$actual_exit)"

tools/smokes/v2/profiles/integration/apps/phase256_p0_split_vm.sh

@@ -5,8 +5,10 @@ HAKORUNE_BIN="${HAKORUNE_BIN:-./target/release/hakorune}"
 HAKO_PATH="apps/tests/phase256_p0_split_min.hako"
 EXPECTED_EXIT=3
 
+set +e
 $HAKORUNE_BIN --backend vm "$HAKO_PATH" >/dev/null 2>&1
 actual_exit=$?
+set -e
 
 if [[ $actual_exit -eq $EXPECTED_EXIT ]]; then
     echo "✅ phase256_p0_split_vm: PASS (exit=$actual_exit)"