Loading large 3D models should not block the entire UI #7843
Description
When attempting to load large 3D models (e.g., larger than 50MB), although the Load3D node displays a loading indicator, the entire ComfyUI UI freezes during this process, which significantly impacts user experience. This should be implemented as asynchronous loading.
Additionally, through testing, files larger than approximately 200MB cannot be loaded at all, and there is currently no error message or notification to inform users of this limitation.
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