fix: .knowledgebase folder can be deleted bug and change "Add file to knowledge base" to "Link file to knowledge base" bug (#786)

### What problem does this PR solve?
fix: .knowledgebase folder can be deleted bug 
fix: change "Add file to knowledge base" to "Link file to knowledge
base" bug
#783 #784

### Type of change

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

web/src/locales/en.ts

@@ -494,7 +494,7 @@ export default {
       knowledgeBase: 'Knowledge Base',
       size: 'Size',
       action: 'Action',
-      addToKnowledge: 'Add to Knowledge Base',
+      addToKnowledge: 'Link to Knowledge Base',
       pleaseSelect: 'Please select',
       newFolder: 'New Folder',
       file: 'File',

web/src/locales/zh-traditional.ts

@@ -458,7 +458,7 @@ export default {
       knowledgeBase: '知識庫',
       size: '大小',
       action: '操作',
-      addToKnowledge: '添加到知識庫',
+      addToKnowledge: '鏈接知識庫',
       pleaseSelect: '請選擇',
       newFolder: '新建文件夾',
       uploadFile: '上傳文件',

web/src/locales/zh.ts

@@ -475,7 +475,7 @@ export default {
       knowledgeBase: '知识库',
       size: '大小',
       action: '操作',
-      addToKnowledge: '添加到知识库',
+      addToKnowledge: '链接知识库',
       pleaseSelect: '请选择',
       newFolder: '新建文件夹',
       uploadFile: '上传文件',

web/src/pages/file-manager/hooks.ts

@@ -14,6 +14,7 @@ import { useGetPagination, useSetPagination } from '@/hooks/logicHooks';
 import { useOneNamespaceEffectsLoading } from '@/hooks/storeHooks';
 import { IFile } from '@/interfaces/database/file-manager';
 import { PaginationProps } from 'antd';
+import { TableRowSelection } from 'antd/es/table/interface';
 import { UploadFile } from 'antd/lib';
 import { useCallback, useEffect, useMemo, useState } from 'react';
 import { useDispatch, useNavigate, useSearchParams, useSelector } from 'umi';
@@ -93,8 +94,11 @@ export const useHandleSearchChange = () => {
 export const useGetRowSelection = () => {
   const [selectedRowKeys, setSelectedRowKeys] = useState<React.Key[]>([]);
 
-  const rowSelection = {
+  const rowSelection: TableRowSelection<IFile> = {
     selectedRowKeys,
+    getCheckboxProps: (record) => {
+      return { disabled: record.source_type === 'knowledgebase' };
+    },
     onChange: (newSelectedRowKeys: React.Key[]) => {
       setSelectedRowKeys(newSelectedRowKeys);
     },