Feat: Add Arxiv GoogleScholar operator #3221 (#9102)

### What problem does this PR solve?

Feat: Add Arxiv GoogleScholar operator #3221

### Type of change


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

web/src/pages/agent/form/duckduckgo-form/index.tsx

@@ -16,6 +16,7 @@ import { useForm, useFormContext } from 'react-hook-form';
 import { z } from 'zod';
 import { Channel, initialDuckValues } from '../../constant';
 import { useFormValues } from '../../hooks/use-form-values';
+import { useWatchFormChange } from '../../hooks/use-watch-form-change';
 import { INextOperatorForm } from '../../interface';
 import { buildOutputList } from '../../utils/build-output-list';
 import { FormWrapper } from '../components/form-wrapper';
@@ -70,6 +71,8 @@ function DuckDuckGoForm({ node }: INextOperatorForm) {
     resolver: zodResolver(FormSchema),
   });
 
+  useWatchFormChange(node?.id, form);
+
   return (
     <Form {...form}>
       <FormWrapper>