perf: run 签名改 &Arc<CompiledModule>，顶层模块跨 run 共享——collect_flat_modules 顶层改 Arc::clone 消除逐 run 常量池深拷贝，全调用点 Arc 包装迁移

crates/oxide_vm/tests/generator_gc_tests.rs

@@ -3,6 +3,8 @@
 //! sweep 变体与闭包捕获变体见 `vm_support.rs` 内部测试（需 crate 内 `resume_generator`
 //! 在模块表未重建时恢复执行，integration 层无法触达）。
 
+use std::sync::Arc;
+
 use oxide_compiler::compiler::Compiler;
 use oxide_parser::Allocator;
 use oxide_vm::vm::Vm;
@@ -18,9 +20,9 @@ fn compile(source: &str) -> oxide_bytecode::module::CompiledModule {
 #[test]
 fn generator_promoted_to_global_survives_full_reset_cleanly() {
     let mut vm = Vm::new();
-    vm.run(&compile(
+    vm.run(&Arc::new(compile(
         "function* g(){ yield 1; yield 2; } globalThis.it = g(); globalThis.it.next(); 0",
-    ))
+    )))
     .expect("run1");
     assert!(vm.session_object_count() > 0, "生成器挂 global 应被 promote 进 session");
 
@@ -29,12 +31,12 @@ fn generator_promoted_to_global_survives_full_reset_cleanly() {
     vm.full_reset();
     assert_eq!(vm.session_object_count(), 0, "full_reset 应清空 session 对象");
 
-    let result = vm.run(&compile("typeof it")).expect("run2");
+    let result = vm.run(&Arc::new(compile("typeof it"))).expect("run2");
     let text = vm.lookup_str(result).expect("typeof 应返回字符串").to_string();
     assert_eq!(text, "undefined");
     // 新会话可正常创建并推进生成器。
     let ok = vm
-        .run(&compile("function* h(){ yield 9; } var it2 = h(); it2.next().value"))
+        .run(&Arc::new(compile("function* h(){ yield 9; } var it2 = h(); it2.next().value")))
         .expect("run3");
     assert_eq!(format!("{ok}"), "9");
 }