Fix: add diffusers, transformers, accelerate, tokenizers to explicit pip install

Fix: move generate.py patch into standalone Python script, remove inline -c

Fix: install ALL deps + patch both wan/__init__.py and generate.py for optional imports

Fix: use external Python script for patching wan/__init__.py (no shell escaping)

Fix: simple regex-based try/except wrapper for all wan submodule imports

Fix: comprehensive deps + monkey-patch wan/__init__.py to tolerate missing optional modules

Fix: add librosa (transitive dep from speech2video import chain)

Fix: add decord + all Wan2.2 deps for proper import chain

Fix: add missing einops dependency

Fix: install Wan2.2 deps directly (skip flash_attn/dashscope which fail in Docker build)

Fix: download model at startup via huggingface-cli, remove build-time download

Switch to official Wan2.2 inference code for native T2V+I2V support

Fix build: add git dependency, install diffusers from source separately

Add Wan2.2 TI2V 5B FastAPI app: text-to-video + image-to-video