Fix prompt kwarg: Flux2KleinPipeline takes image first positionally

Gradio 6: drop show_download_button kwarg (no longer valid on gr.Image)

Add peft: required backend for load_lora_weights

Fix pipeline class: Flux2KleinPipeline via DiffusionPipeline (model_index), not FluxPipeline

jppy-logo FLUX.2-klein LoRA demo: app + README + requirements

initial commit