Initial commit: Prism messenger with Expo + NestJS + GraphQL + PostgreSQL

frontend/src/navigation/AppNavigator.tsx

@@ -0,0 +1,68 @@
+import React from 'react';
+import { NavigationContainer } from '@react-navigation/native';
+import { createNativeStackNavigator } from '@react-navigation/native-stack';
+import { useAuth } from '../contexts/AuthContext';
+import { LoginScreen } from '../screens/LoginScreen';
+import { RegisterScreen } from '../screens/RegisterScreen';
+import { ConversationsScreen } from '../screens/ConversationsScreen';
+import { ChatScreen } from '../screens/ChatScreen';
+import { ActivityIndicator, View } from 'react-native';
+
+const Stack = createNativeStackNavigator();
+
+export const AppNavigator = () => {
+  const { user, isLoading } = useAuth();
+
+  if (isLoading) {
+    return (
+      <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
+        <ActivityIndicator size="large" />
+      </View>
+    );
+  }
+
+  return (
+    <NavigationContainer>
+      <Stack.Navigator>
+        {user ? (
+          <>
+            <Stack.Screen 
+              name="Conversations" 
+              component={ConversationsScreen}
+              options={{ 
+                title: 'Чаты',
+                headerLargeTitle: true,
+              }}
+            />
+            <Stack.Screen 
+              name="Chat" 
+              component={ChatScreen}
+              options={({ route }) => ({ 
+                title: route.params?.title || 'Чат',
+              })}
+            />
+          </>
+        ) : (
+          <>
+            <Stack.Screen 
+              name="Login" 
+              component={LoginScreen}
+              options={{ 
+                title: 'Вход',
+                headerShown: false,
+              }}
+            />
+            <Stack.Screen 
+              name="Register" 
+              component={RegisterScreen}
+              options={{ 
+                title: 'Регистрация',
+                headerShown: false,
+              }}
+            />
+          </>
+        )}
+      </Stack.Navigator>
+    </NavigationContainer>
+  );
+};