feat: mount /tmp directory and add client-side fallback logic for image previews

fix: access file path using dictionary key instead of attribute in image processing functions

feat: add thread-safe model initialization, nest_asyncio support, and pre-loading on startup

feat: add frontend UI for Pixal3D image-to-3D generation interface

Update title, add project page link, add autotune cache

Add ZeroGPU support: import spaces first, add @spaces.GPU decorators, add flex_gemm env vars

Update app.py

Update app.py

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