Thank you for the quick response to my message.
My message is wrong in one place: I tested the old version from Debian
Bullseye.
In Bookworm it behaves as follows: There is an "Imgur Application Client
Id" configured in the installation. So it is possible to use the upload
without any further configuration. But before uploading there is a
security prompt. In German: "Möchest du diese Aufnahme hochladen?"/"Do
you want to upload this image?". You may set "Upload without confirmation".
For privacy reasons I would prefer the image upload function to be
disabled by default and no Imgur Application Id configured.
Best regards.
Peter