I want a cross-platform mobile app built with Flutter that runs smoothly on both iOS and Android. The backend should be in Python using FastAPI, with Firebase acting as the real-time database and push-notification service. Core feature set • Google and Apple single-sign-on for user authentication • Real-time notifications delivered through Firebase Cloud Messaging • On-device data analysis powered by TensorFlow Lite I will provide UI wireframes, labelled sample data for the TensorFlow Lite model, and Firebase project credentials. Your job is to connect all of these pieces into a working MVP: 1. Flutter front-end that compiles for iOS and Android. 2. FastAPI backend with clean, documented endpoints. 3. Fully configured Firebase project (Auth, Firestore/Realtime DB, FCM). 4. Integrated TensorFlow Lite model running locally on the device and triggered from the app UI. 5. End-to-end testing script or instructions so I can confirm builds and API routes. Thank you