2048-android-development

name	2048-android-development
description	Implement or review the Jetpack Compose 2048 app, its ViewModel and storage, Material UI, Gradle build, or emulator tests.

2048 Android development

Read AGENTS.md and the native sections of docs/architecture.md. Keep board rules and session state in GameViewModel.kt, persistence in GameStorage.kt, and presentation in Compose. Preserve deterministic test hooks without weakening production randomness or saved-state validation.

Use Material vector icons and Compose semantics; never use Unicode symbols as controls. Keep tap targets, system insets, contrast, screen-size adaptation, haptics, restart confirmation, help, win continuation, and loss recovery intact.

The board's detectDragGestures must consume each PointerInputChange. The root column scrolls vertically, so an unconsumed change reaches the parent scroll too and a board swipe drags the whole screen. Keep tile animation aligned with the web and iOS timings documented in docs/architecture.md, and keep it collapsing to instant when the system animation scale is zero.

No JDK is required: Gradle provisions its own from gradle/gradle-daemon-jvm.properties. Use the make android-* targets or Scripts-equivalent wrappers rather than calling ./gradlew or adb bare — adb is not on PATH after a default Android Studio install.

Run make test-android for every change. When UI behavior changes and a device is available, run make test-android-device, inspect logcat for app exceptions, and manually review gameplay, help, restart, win, and loss states. make android-run builds, installs, and launches in one step.