fix: remove gr.Progress (ZeroGPU conflict), fix output handling, rembg CPU provider

perf: reduce steps to fit within 120s GPU budget (no more timeout waste)

fix: robust error handling, pipeline load guard, startup logging

feat: add gr.Progress(track_tqdm=True) for live step progress

perf: reduce inference to 10 steps — fits in 120s GPU budget

fix: load TripoSG pipeline to CPU at startup, reduce steps to 20

TripoSG deps matching ai-3d-generator

Rewrite to use TripoSG runtime clone

sdk_version 5.12.0, fix colorFrom

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Fix: runtime clone TripoSG + proper requirements

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initial commit