add lang key into data provider

src/providers/data.ts

@@ -2,16 +2,23 @@ import dataProvider from '@refinedev/simple-rest'
 import axios from 'axios'
 import {BACKEND_URL} from '../lib/constants'
 import {TOKEN_KEY} from '../authProvider'
+import Cookies from 'js-cookie'
 
 const axiosInstance = axios.create()
 
 axiosInstance.interceptors.request.use((config) => {
+  // Добавляем токен авторизации
   const token = localStorage.getItem(TOKEN_KEY)
-
   if (token) {
     config.headers.Authorization = `Bearer ${token}`
   }
 
+  // Добавляем язык в кастомный заголовок
+  const lang = Cookies.get('lang') || 'ru'
+  config.headers['X-Language'] = lang // или 'Accept-Language'
+
+  // console.log('Request headers:', config.headers)
+
   return config
 })