We’re building a hobbyist subscription hub for DIY kit lovers—think model building, painting, and electronics. Users should be able to discover new boxes, manage active subscriptions, track project progress, and browse past kits in a clean, card-based UI. A Floating Action Button provides quick access to searching categories. The app needs to feel smooth across common screen ratios (16:9, 18:9, 20:9, etc.) and look correct on both AMOLED and LCD displays. It must support Chinese (zh-CN) and Brazilian Portuguese (pt-BR). Technically, use Kotlin with an MVC approach and XML-based Views; store local data with GreenDAO and keep simple settings like notification toggles in SharedPreferences. Target Android minSDK 27 and SDK 33. Please separate the build into dev and release flavors and ensure the project builds cleanly and runs well on typical devices (16GB+ eMMC or UFS).