Implement custom dark theme for the app and enhance login/register screens with animations. Update dependencies and fix package versions in package.json and package-lock.json.

frontend/App.tsx

@@ -1,20 +1,49 @@
 import React from 'react';
 import { StatusBar } from 'expo-status-bar';
 import { ApolloProvider } from '@apollo/client';
-import { Provider as PaperProvider } from 'react-native-paper';
+import { Provider as PaperProvider, MD3DarkTheme, configureFonts } from 'react-native-paper';
 import { SafeAreaProvider } from 'react-native-safe-area-context';
 import { apolloClient } from './src/services/apollo-client';
 import { AuthProvider } from './src/contexts/AuthContext';
 import { AppNavigator } from './src/navigation/AppNavigator';
 
+// Кастомная темная тема в черно-фиолетовых тонах
+const theme = {
+  ...MD3DarkTheme,
+  colors: {
+    ...MD3DarkTheme.colors,
+    primary: '#9333ea',
+    secondary: '#a855f7',
+    tertiary: '#7c3aed',
+    background: '#0a0a0f',
+    surface: '#1a1a2e',
+    surfaceVariant: '#2d2d42',
+    onSurface: '#ffffff',
+    onSurfaceVariant: '#e5e5e7',
+    onPrimary: '#ffffff',
+    elevation: {
+      level0: 'transparent',
+      level1: '#1a1a2e',
+      level2: '#2d2d42',
+      level3: '#3d3d56',
+      level4: '#4d4d6a',
+      level5: '#5d5d7e',
+    },
+    outline: '#7c3aed',
+    outlineVariant: '#6d28d9',
+    error: '#ef4444',
+  },
+  roundness: 12,
+};
+
 export default function App() {
   return (
     <SafeAreaProvider>
       <ApolloProvider client={apolloClient}>
-        <PaperProvider>
+        <PaperProvider theme={theme}>
           <AuthProvider>
             <AppNavigator />
-            <StatusBar style="auto" />
+            <StatusBar style="light" />
           </AuthProvider>
         </PaperProvider>
       </ApolloProvider>