deepSignal values iterator: inherit from prototype

sdk/js/alien-deepsignals/src/deepSignal.ts

@@ -678,9 +678,9 @@ function getFromSet(
     const makeIterator = (pair: boolean) => {
         return function thisIter(this: any) {
             const iterable = raw.values();
-            return {
-                [Symbol.iterator]() {
-                    return {
+            // Create an Iterator that inherits Iterator.prototype methods (map, filter, etc.)
+            // Wrap the iterator to proxy entries on-demand
+            const wrappedIterator = {
                 next() {
                     const n = iterable.next();
                     if (n.done) return n;
@@ -691,8 +691,11 @@ function getFromSet(
                     };
                 },
             };
-                },
-            } as Iterable<any>;
+            // Set the prototype to Iterator.prototype if available (ES2023+ Iterator Helpers)
+            if (typeof Iterator !== "undefined" && Iterator.prototype) {
+                Object.setPrototypeOf(wrappedIterator, Iterator.prototype);
+            }
+            return wrappedIterator;
         };
     };
     if (key === "values" || key === "keys") return makeIterator(false);