kevin-weitgenant/gen-canvas-OSS-mixboard ? reverse-engineered prompt

Build me an open source infinite canvas whiteboard app for AI image generation, similar to Mixboard, but simple and hackable.

I want users to paste in their own kie.ai API key, type an idea or let the app help turn it into a better prompt, then generate images and place them on a freeform canvas. The canvas should let people move, resize, and arrange the images however they want, so they can compare different results and build out a visual mood board. Make it easy to download any image they like.

I also want real time progress while images are generating, and the app should work with a backend that handles webhook updates safely without exposing the user’s key. Please make the UI clean and modern, and use current docs online if you need to. If something like saving boards or editing images is too much, leave that out for now and keep the focus on the generation and canvas workflow.