fix: eval 脚本 var 声明落全局 configurable:true——is_eval_script 穿透

crates/oxide_regalloc/tests/runtime_eq.rs

@@ -11,7 +11,9 @@ use oxide_vm::JsValue;
 fn run_source(src: &str, regalloc: bool) -> Result<JsValue, String> {
     let allocator = oxide_parser::Allocator::default();
     let program = oxide_parser::parse(&allocator, src).expect("parse failed");
-    let mut ir = oxide_emit::Emitter::new().emit_program(&program, false).expect("emit failed");
+    let mut ir = oxide_emit::Emitter::new()
+        .emit_program(&program, false, false)
+        .expect("emit failed");
     oxide_dce::dce(&mut ir);
     if regalloc {
         let cfg = oxide_cfg::build_cfg(&ir);
@@ -123,7 +125,7 @@ fn large_and_spill_samples_run_correctly() {
     // 字节码扫描：spill 样例经 alloc + lower 后应含 SPILL 与 UNSPILL opcode
     let allocator = oxide_parser::Allocator::default();
     let program = oxide_parser::parse(&allocator, &src_spill).expect("parse");
-    let mut ir = oxide_emit::Emitter::new().emit_program(&program, false).expect("emit");
+    let mut ir = oxide_emit::Emitter::new().emit_program(&program, false, false).expect("emit");
     oxide_dce::dce(&mut ir);
     let cfg = oxide_cfg::build_cfg(&ir);
     let live = oxide_liveness::liveness(&ir, &cfg);