diff --git a/app/components/MainApp.tsx b/app/components/MainApp.tsx
index 13e9d29..970bf01 100644
--- a/app/components/MainApp.tsx
+++ b/app/components/MainApp.tsx
@@ -17,13 +17,13 @@ export default function MainApp() {
   const [user, setUser] = useState<SafeUser | null>(null);
   const [shopItems, setShopItems] = useState<IShopItem[]>([]);
   const toast = useToast();
-  const { webApp, error: webAppError } = useTelegramWebApp();
+  const { webApp, error: webAppError, isInitialized } = useTelegramWebApp();
 
   useEffect(() => {
-    if (webApp) {
+    if (webApp && isInitialized) {
       initApp();
     }
-  }, [webApp]);
+  }, [webApp, isInitialized]);
 
   const initApp = async () => {
     try {
@@ -35,6 +35,10 @@ export default function MainApp() {
 
       // Авторизация пользователя
       const { user: telegramUser } = webApp.initDataUnsafe;
+      if (!telegramUser) {
+        throw new Error('Пользователь не найден');
+      }
+
       const authResponse = await auth(telegramUser.id.toString(), telegramUser.username || 'anonymous');
       
       // Получение данных пользователя и магазина
@@ -45,6 +49,9 @@ export default function MainApp() {
 
       setUser(profileData as SafeUser);
       setShopItems(shopData);
+
+      // Сообщаем Telegram, что приложение готово
+      webApp.ready();
     } catch (error: any) {
       console.error('Initialization error:', error);
       toast({
@@ -69,7 +76,7 @@ export default function MainApp() {
     );
   }
 
-  if (isLoading || !webApp) {
+  if (isLoading || !webApp || !isInitialized) {
     return (
       <Center h="100vh">
         <Spinner size="xl" />
diff --git a/app/hooks/useTelegramWebApp.ts b/app/hooks/useTelegramWebApp.ts
index 5da1dbb..b237ecc 100644
--- a/app/hooks/useTelegramWebApp.ts
+++ b/app/hooks/useTelegramWebApp.ts
@@ -3,27 +3,73 @@
 import { useEffect, useState } from 'react';
 import { isDemoMode, getDemoWebApp } from '../utils/demo';
 
+export type WebApp = {
+  initData: string;
+  initDataUnsafe: {
+    query_id: string;
+    user: {
+      id: string;
+      first_name: string;
+      username?: string;
+      language_code: string;
+    };
+    auth_date: number;
+    hash: string;
+  };
+  platform: string;
+  colorScheme: string;
+  themeParams: {
+    bg_color: string;
+    text_color: string;
+    hint_color: string;
+    link_color: string;
+    button_color: string;
+    button_text_color: string;
+  };
+  isExpanded: boolean;
+  viewportHeight: number;
+  viewportStableHeight: number;
+  headerColor: string;
+  backgroundColor: string;
+  ready: () => void;
+  expand: () => void;
+  close: () => void;
+};
+
 export function useTelegramWebApp() {
-  const [webApp, setWebApp] = useState<any>(null);
+  const [webApp, setWebApp] = useState<WebApp | null>(null);
   const [error, setError] = useState<string | null>(null);
+  const [isInitialized, setIsInitialized] = useState(false);
 
   useEffect(() => {
     const initWebApp = async () => {
       try {
         if (isDemoMode()) {
-          setWebApp(getDemoWebApp());
-        } else if (typeof window !== 'undefined') {
+          const demoWebApp = getDemoWebApp();
+          setWebApp(demoWebApp);
+          setIsInitialized(true);
+          return;
+        }
+
+        if (typeof window !== 'undefined') {
           const WebAppModule = await import('@twa-dev/sdk');
-          setWebApp(WebAppModule.default);
+          if (WebAppModule.default) {
+            setWebApp(WebAppModule.default);
+            setIsInitialized(true);
+          } else {
+            throw new Error('WebApp не найден');
+          }
         }
       } catch (err) {
-        setError('Ошибка инициализации Telegram Web App');
         console.error('WebApp initialization error:', err);
+        setError('Ошибка инициализации Telegram Web App');
       }
     };
 
-    initWebApp();
-  }, []);
+    if (!isInitialized) {
+      initWebApp();
+    }
+  }, [isInitialized]);
 
-  return { webApp, error };
+  return { webApp, error, isInitialized };
 } 
\ No newline at end of file
diff --git a/app/utils/api.ts b/app/utils/api.ts
index d2db4f9..308a18a 100644
--- a/app/utils/api.ts
+++ b/app/utils/api.ts
@@ -1,73 +1,120 @@
 import axios from 'axios';
+import { isDemoMode } from './demo';
+
+const API_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:3001/api';
 
 const api = axios.create({
-  baseURL: process.env.NEXT_PUBLIC_API_URL,
-  withCredentials: true,
+  baseURL: API_URL,
   headers: {
     'Content-Type': 'application/json',
   },
-  timeout: 10000, // 10 секунд таймаут
 });
 
-// Интерцептор для добавления токена к запросам
+// Демо-данные
+const demoData = {
+  user: {
+    _id: 'demo_user_id',
+    telegramId: '12345',
+    username: 'demo_user',
+    level: 1,
+    experience: 0,
+    balance: 1000,
+    achievements: [],
+  },
+  shopItems: [
+    {
+      _id: 'demo_item_1',
+      name: 'Демо предмет 1',
+      description: 'Описание демо предмета 1',
+      price: 100,
+      type: 'consumable',
+    },
+    {
+      _id: 'demo_item_2',
+      name: 'Демо предмет 2',
+      description: 'Описание демо предмета 2',
+      price: 200,
+      type: 'permanent',
+    },
+  ],
+};
+
+// Интерцептор для добавления токена
 api.interceptors.request.use((config) => {
-  if (typeof window !== 'undefined') {
-    const token = localStorage.getItem('token');
-    if (token) {
-      config.headers.Authorization = `Bearer ${token}`;
-    }
+  const token = localStorage.getItem('token');
+  if (token) {
+    config.headers.Authorization = `Bearer ${token}`;
   }
   return config;
-}, (error) => {
-  return Promise.reject(error);
 });
 
 // Интерцептор для обработки ошибок
 api.interceptors.response.use(
   (response) => response,
   (error) => {
-    if (error.response) {
-      // Ошибка от сервера
-      return Promise.reject(error.response.data);
-    } else if (error.request) {
-      // Ошибка сети
-      return Promise.reject({ error: 'Ошибка сети. Проверьте подключение к интернету.' });
-    } else {
-      // Другие ошибки
-      return Promise.reject({ error: 'Произошла ошибка при выполнении запроса.' });
+    if (error.response?.status === 401) {
+      localStorage.removeItem('token');
     }
+    return Promise.reject(error);
   }
 );
 
 export const auth = async (telegramId: string, username: string) => {
-  try {
-    const response = await api.post('/auth', { telegramId, username });
-    if (typeof window !== 'undefined') {
-      localStorage.setItem('token', response.data.token);
-    }
-    return response.data;
-  } catch (error) {
-    console.error('Auth error:', error);
-    throw error;
+  if (isDemoMode()) {
+    localStorage.setItem('token', 'demo_token');
+    return { token: 'demo_token', user: demoData.user };
   }
+  
+  const response = await api.post('/auth', { telegramId, username });
+  const { token } = response.data;
+  localStorage.setItem('token', token);
+  return response.data;
 };
 
 export const getProfile = async () => {
+  if (isDemoMode()) {
+    return demoData.user;
+  }
+  
   const response = await api.get('/profile');
   return response.data;
 };
 
 export const getShopItems = async () => {
+  if (isDemoMode()) {
+    return demoData.shopItems;
+  }
+  
   const response = await api.get('/shop');
   return response.data;
 };
 
 export const purchaseItem = async (itemId: string) => {
-  const response = await api.post('/shop/purchase', { itemId });
+  if (isDemoMode()) {
+    const item = demoData.shopItems.find(item => item._id === itemId);
+    if (!item) {
+      throw new Error('Предмет не найден');
+    }
+    if (demoData.user.balance < item.price) {
+      throw new Error('Недостаточно средств');
+    }
+    demoData.user.balance -= item.price;
+    return { user: demoData.user };
+  }
+  
+  const response = await api.post(`/shop/purchase/${itemId}`);
   return response.data;
 };
 
-export const transferBalance = async (recipientUsername: string, amount: number) => {
-  const response = await api.post('/transfer', { recipientUsername, amount });
+export const transferBalance = async (username: string, amount: number) => {
+  if (isDemoMode()) {
+    if (demoData.user.balance < amount) {
+      throw new Error('Недостаточно средств');
+    }
+    demoData.user.balance -= amount;
+    return { balance: demoData.user.balance };
+  }
+  
+  const response = await api.post('/transfer', { username, amount });
   return response.data;
 }; 
\ No newline at end of file
diff --git a/app/utils/demo.ts b/app/utils/demo.ts
index 4030711..65951bf 100644
--- a/app/utils/demo.ts
+++ b/app/utils/demo.ts
@@ -1,39 +1,64 @@
+'use client';
+
 // Демо данные для тестирования без Telegram
 const demoUser = {
-  id: 'demo_user',
+  id: 'demo_user_123',
   first_name: 'Demo',
   username: 'demo_user',
   language_code: 'ru'
 };
 
+const demoInitData = {
+  query_id: 'demo_query',
+  user: demoUser,
+  auth_date: Date.now(),
+  hash: 'demo_hash'
+};
+
 export const isDemoMode = () => {
   return typeof window !== 'undefined' && new URLSearchParams(window.location.search).has('demo');
 };
 
-export const getDemoWebApp = () => {
-  return {
-    initData: 'demo_mode',
-    initDataUnsafe: {
-      user: demoUser,
-      start_param: 'demo'
-    },
-    platform: 'demo',
-    colorScheme: 'light',
-    themeParams: {
-      bg_color: '#ffffff',
-      text_color: '#000000',
-      hint_color: '#999999',
-      link_color: '#2481cc',
-      button_color: '#2481cc',
-      button_text_color: '#ffffff'
-    },
-    isExpanded: true,
-    viewportHeight: window.innerHeight,
-    viewportStableHeight: window.innerHeight,
-    headerColor: '#ffffff',
-    backgroundColor: '#ffffff',
-    ready: () => {},
-    expand: () => {},
-    close: () => {}
-  };
-}; 
\ No newline at end of file
+export const getDemoWebApp = () => ({
+  initData: 'demo_mode',
+  initDataUnsafe: demoInitData,
+  platform: 'demo',
+  colorScheme: 'light',
+  themeParams: {
+    bg_color: '#ffffff',
+    text_color: '#000000',
+    hint_color: '#999999',
+    link_color: '#2481cc',
+    button_color: '#2481cc',
+    button_text_color: '#ffffff'
+  },
+  isExpanded: true,
+  viewportHeight: typeof window !== 'undefined' ? window.innerHeight : 800,
+  viewportStableHeight: typeof window !== 'undefined' ? window.innerHeight : 800,
+  headerColor: '#ffffff',
+  backgroundColor: '#ffffff',
+  isClosingConfirmationEnabled: true,
+  BackButton: {
+    isVisible: false,
+    onClick: () => {},
+  },
+  MainButton: {
+    text: '',
+    color: '#2481cc',
+    textColor: '#ffffff',
+    isVisible: false,
+    isProgressVisible: false,
+    isActive: true,
+    setText: () => {},
+    onClick: () => {},
+    show: () => {},
+    hide: () => {},
+    enable: () => {},
+    disable: () => {},
+    showProgress: () => {},
+    hideProgress: () => {},
+  },
+  ready: () => {},
+  expand: () => {},
+  close: () => {},
+}); 
\ No newline at end of file