Update app.py

Update prebackbone weights from yolo11n HR-IPCB best.pt

Add all 38 yolo26 prebackbone_samples as Gradio examples

Update prebackbone weights from yolo26n HR-IPCB best.pt

Fix HF unstyled UI: disable SSR, stop pip-overriding Gradio

Fix HF Space unstyled UI: stop overriding Gradio proxy settings

Fix HF UI: restore gr.Interface layout instead of bare Blocks

RefDiffNet: standalone A11_CA prebackbone Gradio Space

Fix Gradio schema bug: Interface+filepath, gradio-client>=1.4

Use HF-valid Gradio 4.44.0; pil images and share=False

Fix Gradio 4.49 pil images and HF launch (no share)

Pin huggingface_hub<1.0 for Gradio 4.44 compatibility

Fix startup: pin Python 3.10 for Gradio/pydub audioop

RefDiffNet: A11_CA prebackbone demo (clean history, no images in git)