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app/auth/_layout.tsx

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+import { Stack } from 'expo-router';
+
+export default function AuthLayout() {
+  return (
+    <Stack screenOptions={{ headerShown: false }}>
+      <Stack.Screen name="callback" />
+    </Stack>
+  );
+}

app/auth/callback.tsx

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+/**
+ * app/auth/callback.tsx
+ * Handles OAuth deep link: burmalda://auth/callback?code=...
+ * expo-web-browser closes the session, then this page completes the flow.
+ */
+import { useEffect, useState } from 'react';
+import { View, Text, StyleSheet, ActivityIndicator } from 'react-native';
+import { useLocalSearchParams, router } from 'expo-router';
+import * as WebBrowser from 'expo-web-browser';
+import { Colors, Font } from '../../constants/theme';
+import { exchangeCode, saveTokens } from '../../services/api';
+import { useAuth } from '../../store';
+import { saveUser } from '../../hooks/useAuth';
+
+// Complete the auth session so expo-web-browser can close
+WebBrowser.maybeCompleteAuthSession();
+
+export default function AuthCallback() {
+  const params = useLocalSearchParams<{ code?: string; error?: string }>();
+  const { setUser } = useAuth();
+  const [status, setStatus] = useState('Завершаем вход…');
+
+  useEffect(() => {
+    async function finish() {
+      const code = params.code;
+      if (!code) {
+        const msg = params.error || 'Код авторизации отсутствует';
+        setStatus(`Ошибка: ${msg}`);
+        setTimeout(() => router.replace('/auth'), 2000);
+        return;
+      }
+      try {
+        const data = await exchangeCode(code);
+        await saveTokens(data.access_token, data.refresh_token);
+        await saveUser(data.user);
+        setUser(data.user);
+        router.replace('/(tabs)');
+      } catch (e: any) {
+        setStatus(`Ошибка: ${e.message || 'Не удалось войти'}`);
+        setTimeout(() => router.replace('/auth'), 2500);
+      }
+    }
+    finish();
+  }, []);
+
+  return (
+    <View style={s.root}>
+      <ActivityIndicator size="large" color={Colors.accent} />
+      <Text style={s.text}>{status}</Text>
+    </View>
+  );
+}
+
+const s = StyleSheet.create({
+  root: { flex: 1, backgroundColor: Colors.bg, alignItems: 'center', justifyContent: 'center', gap: 20 },
+  text: { color: Colors.text, fontSize: Font.md, textAlign: 'center', opacity: 0.7 },
+});