My production Flutter app has gone off track and I need an experienced developer to bring it back to a stable, clean state. The highest priority issue is that the Home screen does not open — tapping it results in no action. After fixing this, I also need: • Non-responsive buttons across the UI to be restored. • All Firebase connections (Auth, Firestore, Cloud Messaging) reviewed and fixed if needed. • Layout inconsistencies polished for both Android and iOS. • Push notification tests in foreground, background and terminated states. I will provide: • Full source code • A short screen recording reproducing the bug • Firebase project access Please commit fixes with clear comments and provide a build plus a short changelog for verification.