Do not use interop logic on proxy modules (#4761)

### Description

Proxy modules must not use interop logic, otherwise only the `default`
export works correctly

next.js PR: vercel/next.js#49033

crates/turbopack-dev/js/src/runtime.js

@@ -148,6 +148,14 @@ function exportValue(module, value) {
   module.exports = value;
 }
 
+/**
+ * @param {Module} module
+ * @param {any} namespace
+ */
+function exportNamespace(module, namespace) {
+  module.exports = module.namespaceObject = namespace;
+}
+
 /**
  * @param {Record<string, any>} obj
  * @param {string} key
@@ -467,6 +475,7 @@ function instantiateModule(id, source) {
         s: makeEsm.bind(null, module),
         j: cjs.bind(null, module.exports),
         v: exportValue.bind(null, module),
+        n: exportNamespace.bind(null, module),
         m: module,
         c: moduleCache,
         l: loadChunk.bind(null, { type: SourceTypeParent, parentId: id }),

crates/turbopack-dev/src/ecmascript/module_factory.rs

@@ -14,6 +14,7 @@ pub(super) async fn module_factory(content: EcmascriptChunkItemContentVc) -> Res
         "i: __turbopack_import__",
         "s: __turbopack_esm__",
         "v: __turbopack_export_value__",
+        "n: __turbopack_export_namespace__",
         "c: __turbopack_cache__",
         "l: __turbopack_load__",
         "j: __turbopack_cjs__",

crates/turbopack-ecmascript/src/transform/server_to_client_proxy.rs

@@ -42,7 +42,7 @@ pub fn create_proxy_module(transition_name: &str, target_import: &str) -> Progra
                 span: DUMMY_SP,
             })),
             ModuleItem::Stmt(quote!(
-                "__turbopack_export_value__($proxy);" as Stmt,
+                "__turbopack_export_namespace__($proxy);" as Stmt,
                 proxy = ident,
             )),
         ],