Add custom user-LoRA (Quality mode) for the MPS route

feat(zerogpu): get all modes working on ZeroGPU

fix(ui): replace track_tqdm with a manual step callback for clear progress labels

feat(mps): run locally on Apple Silicon MPS with a pre-inference OOM preflight

feat: build Qwen Image Editor app (Edit/Compose tabs, Fast/Quality, ZeroGPU + local CUDA) with tests