v1.2.2

• Added: quantization BitsAndBytes modes none / bnb-8bit / bnb-4bit for best-effort VRAM reduction (requires CUDA + optional bitsandbytes install).
• Improved: clearer Hugging Face download failure diagnostics (network vs gated/auth vs disk/permission) with small retries and actionable hints; added troubleshooting guidance (proxy / endpoint mirror / offline).
• Added: Manual/Offline model download instructions with recommended folder structure for restricted networks.
• Improved: ComfyUI Desktop/Registry installation robustness (remove torch from requirements.txt, add explicit tool.comfy.includes, make WEB_DIRECTORY an absolute path).
• Improved: ? help modal now highlights new features (quantization, offline download, etc.).