feat: port img2img watercolour develop to ZeroGPU (staged LoRA)
#1
by reversely - opened
- Re-add /api/img2img Flux2Klein develop step, rebuilt for ZeroGPU: build-inside-worker, picklable PIL in/out, fails closed without torch/diffusers.
- Inline squaring/load/stylize (clone has no backend/ package).
- LoRA optional: stage 1 runs base img2img; dropping scene_lora.safetensors (or SOZAI_IMG2IMG_LORA_REPO) auto-enables the trigger prompt, no code change.
- diffusers -> git main (Flux2KleinPipeline); add pillow-heif + packages.txt (libheif-dev).
- restore img2imgEnabled/img2imgModel in /api/config.