feat: Add Codemagic environment variables and update Firebase configurations for multi-environment support

codemagic.yaml

@@ -3,15 +3,14 @@ build-script: &build-script
   name: Build Flutter App
   script: |
     flutter pub get
-    # Uncomment the line below if you use build_runner
-    # flutter pub run build_runner build --delete-conflicting-outputs
+    flutter pub run build_runner build --delete-conflicting-outputs
 
     # Build Android
     flutter build appbundle --flavor $FLAVOR
-    
-    # Build iOS
-    flutter build ipa --flavor $FLAVOR --export-options-plist=$FCI_BUILD_DIR/mobile-apps/client-app/ios/exportOptions.plist
 
+    # Build iOS
+    flutter build ipa --flavor $FLAVOR --export-options-plist=$FCI_WORKING_DIRECTORY/ios/exportOptions.plist
+    
 # Reusable script for distributing to Firebase
 distribute-script: &distribute-script
   name: Distribute to Firebase App Distribution