A haptic feedback seam: a HapticFeedback interface, six semantic HapticType intensities, and a typed HapticResult that tells you whether the device actually buzzed. Pick this module if your shared Kotlin code wants to fire a success or error tap without writing the Vibrator/VibrationEffect API-level dance on Android and the UIFeedbackGenerator main-thread dance on iOS — it declares no permission of its own and degrades to a typed result instead of throwing.