Kotlin GitHub Copilot Instructions

- Use Kotlin coroutines with viewModelScope for Android ViewModel operations
- Apply Jetpack Compose for all new UI; avoid XML layouts in new features
- Use Kotlin Flow for reactive streams; StateFlow for UI state
- Apply the ViewModel + Repository pattern with Hilt dependency injection
- Generate KDoc comments for all public functions in library modules
- Use Kotlin Multiplatform for shared business logic between Android and iOS
- Apply Result<T> type for operations that can fail; avoid throwing exceptions
- Generate unit tests with JUnit5 and MockK; use kotest for assertions