Sorry if this Q is related to a simple fix but if it is, I don't see it.

Is there a means of including photos in one's signature that are not external links ... like Photobucket or others?

In the 'edit signature' feature, it appears that the only option for including photos is the external link process.

Is there no way to upload a photo from a device, as is the option when adding photos to a thread in the discussion forums?

Here's all I see when attempting to add a photo via the 'edit signature' feature: