otpauth URIs with padding in the secret are not accepted

[jonasbb]

When adding a new account via the QR code, I get an input validation error on the secret key field. The message states, "Invalid format, allowed characters: a-z2-7". This happens because the secret value contains some padding at the end. Padding seems to be allowed, just discouraged: https://docs.yubico.com/yesdk/users-manual/application-oath/uri-string-format.html#secret

otpauth://totp/Example:[email protected]?secret=AA======&issuer=Example

This is a problem, because when adding an account via QR code I cannot edit the secret key to remove the trailing padding. So this forces me to add the account fully manually.

Please consider either allowing padding for the secret key, i.e., expanding the allowed characters to include =, or to strip them before filling the UI elements.