Add a dropdown list in setting to allow change language. (#726)

* init localization

* Update defaul to en

* Fix merge issue and import path.

* Set default to en

* Change jsx to tsx

* Update the password max length string.

* Remove languageContext as using the recoil instead.

* Add localization to component endpoints pages

* Revert default to en after testing.

* Update LoginForm.tsx

* Fix translation.

* Make lint happy

* Merge (#1)

* Create deploy.yml

* Add localization support for endpoint pages components  (#667)

* init localization

* Update defaul to en

* Fix merge issue and import path.

* Set default to en

* Change jsx to tsx

* Update the password max length string.

* Remove languageContext as using the recoil instead.

* Add localization to component endpoints pages

* Revert default to en after testing.

* Update LoginForm.tsx

* Fix translation.

* Make lint happy

* Add a restart to melisearch in docker-compose.yml (#684)

* Oauth fixes for Cognito (#686)

* Add a restart to melisearch in docker-compose.yml

* Oauth fixes for Cognito

* Use the username or email for full name from oath if not provided

---------

Co-authored-by: Donavan <snark@hey.com>

* Italian localization support for endpoint (#687)

---------

Co-authored-by: Danny Avila <110412045+danny-avila@users.noreply.github.com>
Co-authored-by: Donavan Stanley <donavan.stanley@gmail.com>
Co-authored-by: Donavan <snark@hey.com>
Co-authored-by: Marco Beretta <81851188+Berry-13@users.noreply.github.com>

* Translate Nav pages

* Fix npm test

* Add setting dropdown to change the language

* Fix unit test

* Use useRecoilState

---------

Co-authored-by: Danny Avila <110412045+danny-avila@users.noreply.github.com>
Co-authored-by: Donavan Stanley <donavan.stanley@gmail.com>
Co-authored-by: Donavan <snark@hey.com>
Co-authored-by: Marco Beretta <81851188+Berry-13@users.noreply.github.com>

client/src/components/Nav/SettingsTabs/General.tsx

@@ -3,7 +3,7 @@ import { CheckIcon } from 'lucide-react';
 import { ThemeContext } from '~/hooks/ThemeContext';
 import React, { useState, useContext, useEffect, useCallback } from 'react';
 import { useClearConversationsMutation } from 'librechat-data-provider';
-import { useRecoilValue } from 'recoil';
+import { useRecoilValue, useRecoilState } from 'recoil';
 import store from '~/store';
 import { localize } from '~/localization/Translation';
 
@@ -66,10 +66,38 @@ export const ClearChatsButton = ({
   );
 };
 
+export const LangSelector = ({
+  langcode,
+  onChange,
+}: {
+  langcode: string;
+  onChange: (value: string) => void;
+}) => {
+  const lang = useRecoilValue(store.lang);
+
+  return (
+    <div className="flex items-center justify-between">
+      <div>{localize(lang, 'com_nav_language')}</div>
+      <select
+        className="w-24 rounded border border-black/10 bg-transparent text-sm dark:border-white/20 dark:bg-gray-900"
+        onChange={(e) => onChange(e.target.value)}
+        value={langcode}
+      >
+        <option value="en">{localize(lang, 'com_nav_lang_english')}</option>
+        <option value="cn">{localize(lang, 'com_nav_lang_chinese')}</option>
+        <option value="it">{localize(lang, 'com_nav_lang_italian')}</option>
+        <option value="br">{localize(lang, 'com_nav_lang_brazilian_portuguese')}</option>
+        <option value="es">{localize(lang, 'com_nav_lang_spanish')}</option>
+      </select>
+    </div>
+  );
+};
+
 function General() {
   const { theme, setTheme } = useContext(ThemeContext);
   const clearConvosMutation = useClearConversationsMutation();
   const [confirmClear, setConfirmClear] = useState(false);
+  const [langcode, setLangcode] = useRecoilState(store.lang);
   const { newConversation } = store.useConversation();
   const { refreshConversations } = store.useConversations();
 
@@ -97,12 +125,22 @@ function General() {
     [setTheme],
   );
 
+  const changeLang = useCallback(
+    (value: string) => {
+      setLangcode(value);
+    },
+    [setLangcode],
+  );
+
   return (
     <Tabs.Content value="general" role="tabpanel" className="w-full md:min-h-[300px]">
       <div className="flex flex-col gap-3 text-sm text-gray-600 dark:text-gray-300">
         <div className="border-b pb-3 last-of-type:border-b-0 dark:border-gray-700">
           <ThemeSelector theme={theme} onChange={changeTheme} />
         </div>
+        <div className="border-b pb-3 last-of-type:border-b-0 dark:border-gray-700">
+          <LangSelector langcode={langcode} onChange={changeLang} />
+        </div>
         <div className="border-b pb-3 last-of-type:border-b-0 dark:border-gray-700">
           <ClearChatsButton confirmClear={confirmClear} onClick={clearConvos} showText={true} />
         </div>

client/src/components/Nav/SettingsTabs/LangSelector.spec.tsx

@@ -0,0 +1,36 @@
+import React from 'react';
+import { render, fireEvent } from '@testing-library/react';
+import '@testing-library/jest-dom/extend-expect';
+import { LangSelector } from './General';
+import { RecoilRoot } from 'recoil';
+
+describe('LangSelector', () => {
+  let mockOnChange;
+
+  beforeEach(() => {
+    mockOnChange = jest.fn();
+  });
+
+  it('renders correctly', () => {
+    const { getByText, getByDisplayValue } = render(
+      <RecoilRoot>
+        <LangSelector langcode="en" onChange={mockOnChange} />
+      </RecoilRoot>,
+    );
+
+    expect(getByText('Language')).toBeInTheDocument();
+    expect(getByDisplayValue('English')).toBeInTheDocument();
+  });
+
+  it('calls onChange when the select value changes', () => {
+    const { getByDisplayValue } = render(
+      <RecoilRoot>
+        <LangSelector langcode="en" onChange={mockOnChange} />
+      </RecoilRoot>,
+    );
+
+    fireEvent.change(getByDisplayValue('English'), { target: { value: 'it' } });
+
+    expect(mockOnChange).toHaveBeenCalledWith('it');
+  });
+});