Fix: File selection in Retrieval testing causes other options to disappear (#7759)

### What problem does this PR solve?

https://github.com/infiniflow/ragflow/issues/7753

The internal is due to when the selected row keys change will trigger a
testing, but I do not know why.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/add-knowledge/components/knowledge-testing/testing-control/index.tsx

@@ -18,10 +18,15 @@ type FieldType = {
 
 interface IProps {
   form: FormInstance;
-  handleTesting: () => Promise<any>;
+  handleTesting: (documentIds?: string[]) => Promise<any>;
+  selectedDocumentIds: string[];
 }
 
-const TestingControl = ({ form, handleTesting }: IProps) => {
+const TestingControl = ({
+  form,
+  handleTesting,
+  selectedDocumentIds,
+}: IProps) => {
   const question = Form.useWatch('question', { form, preserve: true });
   const loading = useChunkIsTesting();
   const { t } = useTranslate('knowledgeDetails');
@@ -29,6 +34,10 @@ const TestingControl = ({ form, handleTesting }: IProps) => {
   const buttonDisabled =
     !question || (typeof question === 'string' && question.trim() === '');
 
+  const onClick = () => {
+    handleTesting(selectedDocumentIds);
+  };
+
   return (
     <section className={styles.testingControlWrapper}>
       <div>
@@ -53,7 +62,7 @@ const TestingControl = ({ form, handleTesting }: IProps) => {
               <Button
                 type="primary"
                 size="small"
-                onClick={handleTesting}
+                onClick={onClick}
                 disabled={buttonDisabled}
                 loading={loading}
               >