Feat: Fixed the issue where some fields in the chat configuration could not be displayed #3221 (#9430)

### What problem does this PR solve?

Feat: Fixed the issue where some fields in the chat configuration could
not be displayed #3221
### Type of change


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

web/src/components/top-n-item.tsx

@@ -1,5 +1,6 @@
 import { useTranslate } from '@/hooks/common-hooks';
 import { Form, Slider } from 'antd';
+import { z } from 'zod';
 import { SliderInputFormField } from './slider-input-form-field';
 
 type FieldType = {
@@ -32,6 +33,10 @@ interface SimilaritySliderFormFieldProps {
   max?: number;
 }
 
+export const topnSchema = {
+  top_n: z.number().optional(),
+};
+
 export function TopNFormField({ max = 30 }: SimilaritySliderFormFieldProps) {
   const { t } = useTranslate('chat');