I already have an iOS-only React Native app in TestFlight with the login flow and a handful of core screens fully functional. All assets, styles and Figma files for two new sections—Cart and Messages—are ready to hand over. Your job is to wire those designs into the current codebase, hook them up to the existing Redux/React Context state (or suggest a cleaner approach if you see fit), and make sure the new routes fit seamlessly into my current React Navigation stack. Any network calls will reuse the same REST API helpers already in the project; you’ll mostly be adding new endpoints and handling the responses. Acceptance criteria • Cart and Messages screens match the supplied designs pixel-perfect on iPhone 11 → 15 Pro. • Navigation, deep linking and back-button behaviour remain intact throughout the app. • No new warnings or regressions in Xcode build or in the Expo/CLI logs. • Final pull request builds cleanly and passes the existing unit tests (written in Jest). Start your proposal with “MOBILE” so I know you’ve read this. Feel free to include a quick note about similar React Native features you’ve shipped before and an estimated number of days you’ll need once you see the repository.