We’re building a simple, fast baby feeding and diaper tracker that sleep-deprived parents can use with just a few taps. It should let you quickly record a feeding (breast or bottle) or a diaper change, show the day’s history at a glance, and work reliably in both portrait and landscape. Save each day’s entries privately on the device as a single serialized list in a new file per day, and start a new file automatically for the next day. Use Kotlin with a predictable, testable state flow (MVI) and a clean Material Design UI built in XML, including Dark Mode for late-night use. The app must run on Android 12/12L (min SDK 31, target 32), scale well from 720p up to 4K, and ship for ARM, ARM64, x86, and x86_64. Keep startup fast, interactions snappy, and ensure the project compiles cleanly and is easy to test.