Rewrite Support specified language or language according to initial question (#4990)

Support specified language or language according to initial question

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

web/src/locales/en.ts

@@ -523,6 +523,8 @@ This procedure will improve precision of retrieval by adding more information to
         'It will retrieve descriptions of relevant entities,relations and community reports, which will enhance inference of multi-hop and complex question.',
       keyword: 'Keyword analysis',
       keywordTip: `Apply LLM to analyze user's questions, extract keywords which will be emphesize during the relevance omputation.`,
+      languageTip:
+        'Allows sentence rewriting with the specified language or defaults to the latest question if not selected.',
     },
     setting: {
       profile: 'Profile',

web/src/pages/flow/constant.tsx

@@ -426,6 +426,7 @@ export const initialGenerateValues = {
 
 export const initialRewriteQuestionValues = {
   ...initialLlmBaseValues,
+  language: '',
   message_history_window_size: 6,
 };
 

web/src/pages/flow/flow-drawer/index.tsx

@@ -166,6 +166,7 @@ const FormDrawer = ({
                 ></Input>
               )}
             </Flex>
+
             {needsSingleStepDebugging(operatorName) && (
               <RunTooltip>
                 <Play

web/src/pages/flow/form/rewrite-question-form/index.tsx

@@ -1,7 +1,8 @@
 import LLMSelect from '@/components/llm-select';
 import MessageHistoryWindowSizeItem from '@/components/message-history-window-size-item';
 import { useTranslate } from '@/hooks/common-hooks';
-import { Form } from 'antd';
+import { Form, Select } from 'antd';
+import { GoogleLanguageOptions } from '../../constant';
 import { IOperatorForm } from '../../interface';
 
 const RewriteQuestionForm = ({ onValuesChange, form }: IOperatorForm) => {
@@ -23,6 +24,13 @@ const RewriteQuestionForm = ({ onValuesChange, form }: IOperatorForm) => {
       >
         <LLMSelect></LLMSelect>
       </Form.Item>
+      <Form.Item
+        label={t('language')}
+        name={'language'}
+        tooltip={t('languageTip')}
+      >
+        <Select options={GoogleLanguageOptions} allowClear={true}></Select>
+      </Form.Item>
       <MessageHistoryWindowSizeItem
         initialValue={6}
       ></MessageHistoryWindowSizeItem>