Tap to Exit with Navigation 3 - Kotlin Multiplatform (Android/iOS)

A tutorial on implementing a tap-to-exit confirmation dialog using the Navigation 3 library in a Kotlin Multiplatform project targeting Android and iOS. It covers creating an alert dialog with confirm/dismiss buttons, using BackHandler to intercept the system back button only when the back stack has one screen remaining, and calling activity.finish() on confirmation. The iOS side is addressed separately, noting that Apple's Human Interface Guidelines discourage programmatic app termination, so the feature is recommended for Android only.