Support gr.LoginButton for gr.load()

[abidlabs]

Test with:

import gradio as gr

with gr.Blocks() as demo:
    button = gr.LoginButton("Sign in to use your Hugging Face Token")
    with gr.Column(variant="panel"):
        gr.load("distilbert/distilbert-base-uncased", accept_token=button, src="models")
    
demo.launch()

Or on Spaces: https://huggingface.co/spaces/abidlabs/login-load

Closes: #10543

More context: https://github.com/huggingface-internal/moon-landing/issues/12460#issuecomment-2648148706, cc @julien-c @kefranabg

[gradio-pr-bot]

🪼 branch checks and previews

•	Name	Status	URL
	Spaces	ready!	Spaces preview
	Website	ready!	Website preview
🦄	Changes	detected!	Details

---

Install Gradio from this PR

pip install https://gradio-pypi-previews.s3.amazonaws.com/c2a86db3d10441fb9eb1d1efacff07b0f2cdff2d/gradio-5.16.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@c2a86db3d10441fb9eb1d1efacff07b0f2cdff2d#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-npm-previews.s3.amazonaws.com/c2a86db3d10441fb9eb1d1efacff07b0f2cdff2d/gradio-client-1.12.0.tgz

Use Lite from this PR

<script type="module" src="https://gradio-lite-previews.s3.amazonaws.com/c2a86db3d10441fb9eb1d1efacff07b0f2cdff2d/dist/lite.js""></script>

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
gradio	minor

• Maintainers can select this checkbox to manually select packages to update.

With the following changelog entry.

Support gr.LoginButton for gr.load()

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[freddyaboulton]

Is this ready for review?

[abidlabs]

Still doing some testing, but hopefully soon!

[abidlabs]

Ok I'm opening this up for review. There seems to be a separate issue with HF Inference API not working through Spaces, but it seems unrelated to this PR...

[abidlabs]

Ok there are a few strange issues going on with gr.load() on Spaces. Let me just fix them in this PR so we have a real end-to-end test we can do.