feat: persist wallet and session state securely#52
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Summary This PR implements secure persistence for wallet and session states, ensuring users remain connected across app restarts without compromising sensitive data. It introduces a hybrid storage approach using AsyncStorage for non-sensitive preferences and Expo SecureStore for session tokens.
Key Changes
Hybrid Storage Architecture : Created a new storage utility that wraps AsyncStorage and SecureStore with standardized error handling.
State Persistence : Integrated Zustand persist middleware into wallet.store.ts and session.store.ts .
Smooth Rehydration : Updated the entry screen to handle the hydration lifecycle, preventing flashes of unauthenticated states during startup.
Secure Data Clearing : Enhanced the reset flow to purge all persisted data when a user logs out or resets the app.
Testing : Added a new storage test suite and global mocks to ensure reliable rehydration and storage error handling.
Acceptance Criteria Verified
Wallet address is restored after app restart.
Startup flow waits for hydration before redirecting.
Session tokens are stored exclusively in Secure Storage.
Resetting app state clears all persisted data.
Storage errors are handled gracefully without crashing.