[BUG] attempting to decrypt password encrypted with subkey on smart card prompts for password

[skewballfox]

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Describe the bug

My gpg setup is one where I have a Master key with C capabilities, and a subkey with E capabilities which only exists on a hardware key(yubikey). When attempting to use a password which was encrypted with this (passwordless) private subkey, the application prompts for a password (I'm assuming for the master key).

Steps to reproduce

Steps to reproduce the behavior:

1. import public master-key
2. Click on any password encrypted with the encryption sub-key for the imported master-key
3. app prompts for password

Expected behavior

The application should either:

1. detect that the master key doesn't have E(ncryption) capability, and check to see if a subkey has E capability, upon finding one prompt for the subkey. it should probably cache some config information for future operations.
2. have a dedicated settings menu for indicating this kind of setup.

Screenshots

No response

Device information

• Device: Google Pixel 4aXL
• OS: GrapheneOS Android 12
• App version: Development build

Additional context

Most yubikey users who are using their device for gpg keys are probably using a setup extremely similar to this, as it was created following a popular guide on setting gpg up on a yubikey(or set of yubikeys). It's the third search result on google for "yubikey gpg", the first after the official documentation. It's probably safe to assume that if a user is using a gpg key stored on a yubikey with pass or a pass compatible tool, they are probably running the exact same setup.