Feature: Option to require both PIN and Fingerprint for login and sign txs

[gernotpokorny]

Hello,

Currently, you can use either a PIN or a fingerprint to login and sign transactions. Could you please introduce an option to require both a PIN and a fingerprint for login and transaction signing?

This would act as a type of two-factor authentication (2FA). Even if a device is stolen and the attacker knows the PIN, they would still not be able to access the funds without the fingerprint.

Using only a fingerprint instead of a PIN can be disadvantageous in other certain attack scenarios. I would prefer an option to use both a PIN and a fingerprint for login and signing transactions.

Thank you!