diff --git a/app/components/MainApp.tsx b/app/components/MainApp.tsx
index 34bf64c..8fa1865 100644
--- a/app/components/MainApp.tsx
+++ b/app/components/MainApp.tsx
@@ -1,24 +1,29 @@
 'use client';
 
 import React, { useEffect, useState } from 'react';
-import { Container, Tabs, TabList, TabPanels, Tab, TabPanel, useToast } from '@chakra-ui/react';
+import { Container, Tabs, TabList, TabPanels, Tab, TabPanel, useToast, Spinner, Center } from '@chakra-ui/react';
 import { UserProfile } from './UserProfile';
 import { Shop } from './Shop';
 import { TransferBalance } from './TransferBalance';
 import * as api from '../utils/api';
-import WebApp from '@twa-dev/sdk';
 import { IUser } from '../../backend/models/User';
 import { IShopItem } from '../../backend/models/ShopItem';
 
+type SafeUser = Omit<IUser, keyof Document>;
+
 export function MainApp() {
-  const [user, setUser] = useState<IUser | null>(null);
+  const [user, setUser] = useState<SafeUser | null>(null);
   const [shopItems, setShopItems] = useState<IShopItem[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
   const toast = useToast();
 
   useEffect(() => {
     const initApp = async () => {
       try {
-        // Получаем данные из Telegram WebApp
+        setIsLoading(true);
+        // Динамически импортируем SDK только на клиенте
+        const WebApp = (await import('@twa-dev/sdk')).default;
+        
         const initData = WebApp.initData;
         if (!initData) {
           throw new Error('Приложение должно быть открыто в Telegram');
@@ -42,6 +47,8 @@ export function MainApp() {
           duration: 5000,
           isClosable: true,
         });
+      } finally {
+        setIsLoading(false);
       }
     };
 
@@ -90,8 +97,16 @@ export function MainApp() {
     }
   };
 
+  if (isLoading) {
+    return (
+      <Center h="100vh">
+        <Spinner size="xl" />
+      </Center>
+    );
+  }
+
   if (!user) {
-    return null; // или компонент загрузки
+    return null;
   }
 
   return (
diff --git a/app/components/Shop.tsx b/app/components/Shop.tsx
index a91ecec..f5b33ba 100644
--- a/app/components/Shop.tsx
+++ b/app/components/Shop.tsx
@@ -11,14 +11,10 @@ import {
   useToast,
   useColorModeValue,
 } from '@chakra-ui/react';
-import { InventoryItem } from '../types/user';
-
-interface ShopItem extends InventoryItem {
-  price: number;
-}
+import { IShopItem } from '../../backend/models/ShopItem';
 
 interface ShopProps {
-  items: ShopItem[];
+  items: IShopItem[];
   userBalance: number;
   onPurchase: (itemId: string) => Promise<void>;
 }
@@ -28,7 +24,7 @@ export const Shop: React.FC<ShopProps> = ({ items, userBalance, onPurchase }) =>
   const bgColor = useColorModeValue('white', 'gray.800');
   const borderColor = useColorModeValue('gray.200', 'gray.700');
 
-  const handlePurchase = async (item: ShopItem) => {
+  const handlePurchase = async (item: IShopItem) => {
     if (userBalance < item.price) {
       toast({
         title: 'Недостаточно средств',