Configured offline authentication on iOS and handled device lock management

src/screen/FaceAuth.tsx

@@ -67,4 +67,10 @@ const styles = StyleSheet.create({
     button: {
         backgroundColor: '#4CAF50',
         padding: 15,
-        borderRadius
+        borderRadius: 8,
+    },
+    buttonText: {
+        color: '#fff',
+        fontWeight: 'bold',
+    },
+});