fix: move all output and storage directories from /tmp to local app subdirectories to fix Gradio serving issues on HF; explicitly allow results/checkpoints paths; set Audio type to filepath
fix: lazy-import torch/torchaudio in inference.py to avoid libcudart.so.13 crash; pin cu124 wheels in requirements to prevent demucs pulling CUDA-13 torchaudio
fix: consolidate Demucs+SeedVC+Mix into single @spaces.GPU function to fix ZeroGPU nested GPU call error; expose _separate_audio_impl; add libsox-dev to packages.txt