fix login and add notifications

ios/Podfile

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-# platform :ios, '13.0'
+platform :ios, '13.0'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'
@@ -36,8 +36,19 @@ target 'Runner' do
   end
 end
 
+# OneSignal Notification Service Extension (OUTSIDE Runner target)
+target 'OneSignalNotificationServiceExtension' do
+  use_frameworks!
+  pod 'OneSignalXCFramework', '>= 5.0.0', '< 6.0'
+end
+
 post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
+
+    # Ensure consistent deployment target
+    target.build_configurations.each do |config|
+      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '13.0'
+    end
   end
-end
+end