Feat: Set the outputs type of list operation. #10427 (#11366)

### What problem does this PR solve?

Feat: Set the outputs type of list operation. #10427

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/utils.ts

@@ -732,3 +732,7 @@ export function buildBeginQueryWithObject(
 
   return nextInputs;
 }
+
+export function getArrayElementType(type: string) {
+  return typeof type === 'string' ? type.match(/<([^>]+)>/)?.at(1) ?? '' : '';
+}