feat: 实现 Iterator.concat 按序拼接迭代器

crates/oxide_vm/src/bindings/bind_iterator.rs

@@ -7,7 +7,8 @@ use crate::bindings::{
     configure_native_constructor, BindEnv,
 };
 
-/// 绑定 `Iterator` 全局构造器（`prototype` = %IteratorPrototype%、`from`/`zip` 方法）。
+/// 绑定 `Iterator` 全局构造器（`prototype` = %IteratorPrototype%、`from`/`zip`/
+/// `concat` 方法）。
 ///
 /// 迭代器原型方法（%IteratorPrototype% 的 `@@iterator` 与各集合原型 `next`）由
 /// `rebind_dirty_builtins` 的 object 分支统一安装，本入口不重复绑定，避免
@@ -30,6 +31,7 @@ pub fn bind_iterator(env: BindEnv<'_>, global: &mut JsObject) {
         &[
             ("from", oxide_builtins::iterator::iterator_from::<crate::vm::Vm> as *const (), 1),
             ("zip", oxide_builtins::iterator::iterator_zip::<crate::vm::Vm> as *const (), 1),
+            ("concat", oxide_builtins::iterator::iterator_concat::<crate::vm::Vm> as *const (), 0),
         ],
     );
 

crates/oxide_vm/src/bindings/mod.rs

@@ -966,6 +966,7 @@ fn bind_iterator_global(env: BindEnv<'_>, global: &mut JsObject) {
         &[
             ("from", oxide_builtins::iterator::iterator_from::<crate::vm::Vm> as *const (), 1),
             ("zip", oxide_builtins::iterator::iterator_zip::<crate::vm::Vm> as *const (), 1),
+            ("concat", oxide_builtins::iterator::iterator_concat::<crate::vm::Vm> as *const (), 0),
         ],
     );
     let iterator_ptr = Box::into_raw(iterator);