Nested Picture-in-Picture Software UI

Generate a 'picture-in-picture' image with visual depth. The outermost layer is a realistic programming_interface, nested with a app_name chat interface. In the chat, I am sending a message saying: 'request_content'. The app replies with an exquisite coffee poster, which is also clearly displayed in the chat interface. Each UI layer must maintain realistic style and detail, with clear micro-details like time digits and button text.