Fix AssertionError in Gradio when reusing inputs by replacing shutil.move with shutil.copy

Fix numpy inhomogeneous array error by explicitly casting to float

Fix deprecated numpy types (np.float -> float, np.int -> int, etc) that break on newer numpy versions

Fix Python 3 TypeError by raising ValueError and lower face detection threshold to 0.80

Fix permissions errors by patching weight download paths

Completely rewrite the Space to a Talking Avatar Converter powered by SadTalker and ZeroGPU