Hi!
How about adding some privacy-related features?
For example, password-protected notes.
Example use case: you're stepped away and accidentally forgot to lock your desktop. Then everyone can access your very important notes.
Next case is a password leak. Everything is clear here, I think.
Of course, such notes must be encrypted in storage.
Some considerations for implementation:
Re-ask login password
Configure some master-password
Configure password for each protected note