Fix: Knowledge base page cannot upload folders #6062 (#6096)

### What problem does this PR solve?

Fix: Knowledge base page cannot upload folders #6062

### Type of change

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

web/src/components/delimiter.tsx

     <Form.Item
       name={['parser_config', 'delimiter']}
       label={t('knowledgeDetails.delimiter')}
-      initialValue={`\\n!?;。；！？`}
+      initialValue={`\n`}
       rules={[{ required: true }]}
       tooltip={t('knowledgeDetails.delimiterTip')}
     >

web/src/components/file-upload-modal/index.tsx

   );
 };
 
-interface IFileUploadModalProps extends IModalProps<boolean | UploadFile[]> {
+interface IFileUploadModalProps
+  extends IModalProps<
+    { parseOnCreation: boolean; directoryFileList: UploadFile[] } | UploadFile[]
+  > {
   uploadFileList?: UploadFile[];
   setUploadFileList?: Dispatch<SetStateAction<UploadFile[]>>;
   uploadProgress?: number;
     }
 
     const ret = await onFileUploadOk?.(
-      fileList ? parseOnCreation : [...currentFileList, ...directoryFileList],
+      fileList
+        ? { parseOnCreation, directoryFileList }
+        : [...currentFileList, ...directoryFileList],
     );
     return ret;
   };

web/src/pages/add-knowledge/components/knowledge-file/hooks.ts

   const { runDocumentByIds, loading: _ } = useRunNextDocument();
 
   const onDocumentUploadOk = useCallback(
-    async (parseOnCreation: boolean): Promise<number | undefined> => {
+    async ({
+      parseOnCreation,
+      directoryFileList,
+    }: {
+      directoryFileList: UploadFile[];
+      parseOnCreation: boolean;
+    }): Promise<number | undefined> => {
       const processFileGroup = async (filesPart: UploadFile[]) => {
         // set status to uploading on files
         setFileList(
           totalSuccess: succesfulFilenames.length,
         };
       };
-
       const totalFiles = fileList.length;
 
+      if (directoryFileList.length > 0) {
+        const ret = await uploadDocument(directoryFileList);
+        if (ret?.code === 0) {
+          hideDocumentUploadModal();
+        }
+        if (totalFiles === 0) {
+          return 0;
+        }
+      }
+
       if (totalFiles === 0) {
         console.log('No files to upload');
         hideDocumentUploadModal();