Make device and @spaces.GPU decorator conditional — supports both ZeroGPU and CPU-basic tiers

fix: stub HfFolder in huggingface_hub for gradio 4.44.0 compatibility

fix: stub audioop/pyaudioop in sys.modules before gradio import (Python 3.13)

fix: huggingface_hub version floor, pandas .copy(), flagging_mode

fix: remove gradio pin (HF manages it), keep pyaudioop for py3.13

fix: gradio>=5 + pyaudioop for Python 3.13 compatibility

Kronos-mini 3-day forecast endpoint