[FEAT] Add a customizable clipboard clearing timer

[LeDimigit]

Description

To bring the desktop and mobile experiences even closer to the official Bitwarden client regarding security and peace of mind, I would love to see a clipboard clearing timer feature integrated into Keyguard across all platforms.

Expected Behavior / Feature Details

1. Clipboard clearing timer:
Currently, when copying a password or a TOTP code, the data remains in the clipboard indefinitely (unless cleared by the OS or another app). This can expose sensitive data to other applications.

It would be extremely beneficial to add a setting that automatically clears the clipboard after a user-defined delay, exactly like Bitwarden does.

Ideally, the available dropdown options for the timer should be:

• Never
• 10 seconds
• 20 seconds
• 30 seconds
• 1 minute
• 2 minutes
• 5 minutes

[AChep]

Sounds good.

As for the Minimize on copy, for now you can use the Quick search shortcut. That one is targeting the keyboard use more and does already hide on copy: https://github.com/AChep/keyguard-app/blob/master/wiki/SHORTCUTS.md#global-shortcuts

[LeDimigit]

Thank you very much for making me aware of the Quick search shortcut; the feature is really useful. However, I suggest that the window should close automatically as soon as an item is copied, since it currently stays persistent.

[AChep]

Thank you very much for making me aware of the Quick search shortcut; the feature is really useful. However, I suggest that the window should close automatically as soon as an item is copied, since it currently stays persistent.

Hmm, it should close if you use the keyboard shortcut to copy. I guess that's where the Minimize on copy suggestion still applies :D

[LeDimigit]

Thank you very much for making me aware of the Quick search shortcut; the feature is really useful. However, I suggest that the window should close automatically as soon as an item is copied, since it currently stays persistent.

Hmm, it should close if you use the keyboard shortcut to copy. I guess that's where the Minimize on copy suggestion still applies :D

Yes, my bad. Indeed, when I use the keyboard shortcuts to copy, the window closes properly. However, if I click directly to copy the different elements from the window, it remains open. So I will use the shortcuts, thank you :)

[AChep]

I've removed the Minimize on copy request from the PR's body as we already have #1368