[timilehin01010-byte]

Overview

This PR adds haptic feedback effects to the mobile app transfer experience. Successful transfers now trigger a crisp success notification, and key touch interactions provide subtle feedback to make the app feel more responsive.

Related Issue

Closes the mobile app issue: Add haptic feedback effects for touch interactions and success states.

Changes

📱 Haptic Feedback Integration

• [MODIFY] mobileapp/app/transfer.tsx
  • Import * as Haptics from 'expo-haptics'.
  • Invoke Haptics.notificationAsync(Haptics.NotificationFeedbackType.Success) when a transfer transaction finalizes.
  • Add lightweight Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light) feedback on key button presses and touch interactions.
  • Keep haptics scoped to successful user actions and avoid triggering on failures or passive renders.

Verification Results

cd mobileapp && npx tsc --noEmit
✅ Type check passed

Manual verification:
✅ Success haptic fires when transfer finalizes
✅ Key presses give crisp light impact feedback
✅ No haptic feedback on failed transactions

Acceptance Criteria	Status
Invoke ExpoHaptics.notificationAsync(Success) when transactions finalize	✅ Implemented with Haptics.notificationAsync(Haptics.NotificationFeedbackType.Success) on transfer finalization

Closes #700

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[ONEONUORA]

@timilehin01010-byte
PLs make your implementation to pass CI checks

[ONEONUORA]

Great job @timilehin01010-byte