I need a small demo project built in Flutter that runs on iOS only and showcases in-app subscriptions. When I open the app I want to see a clean Material-style screen listing three placeholder subscription products. Tapping any product should open a simple detail view that pulls the price, description and a “Buy” button from StoreKit. A second screen lets the user restore previous purchases. Local, on-device receipt verification must be included. Please wire it up with the standard `in_app_purchase` package (or any updated alternative) and add the necessary `verifyReceipt` logic so I can just drop in my own shared secret, bundle ID and product identifiers later. Everything should compile in the latest stable Flutter channel and be fully sandbox-testable. Deliverables • Complete Flutter project with source code • Clear README explaining where to replace keys, bundle ID and subscription IDs • Minimal UI that follows Material Design widgets, no extra styling needed • Tested flow for purchase, restore and local receipt validation If something is unclear, let me know before you start; I want to keep the scope tight and usable as a starting point for my production app. Note: Timeline is 2days