Lack of wallet auto-lock

[iuricmp]

The wallet does not implement an auto-lock feature, allowing long access to the wallet without
reauthentication, which can lead to unauthorized usage if the user leaves their session unattended.

Recommendation

Implement an auto-lock feature that locks the wallet after a predefined period of inactivity, requiring the
user to re-authenticate before regaining access. This will prevent unauthorized access during unattended
sessions