A mother consulted a dentist about the lip lesions in her child. Throughout the 1-2 year of life, the child had diathesis of moderate severity with affection of the face skin. Objectively: the lips are somewhat edematous, there are dry crusts on the vermilion border and the lip skin, in the mouth corners there are cracks and radial scars. The eyelids are edematous with hyperemic edges. What is the most likely diagnosis?