Playground fixes and refactoring

[aliabd]

Refactors a bunch of the code, especially with error fixing. There's still more to be done in future PRs

Also using the error modal status tracker now for generation errors, which looks much nicer imo and grabs more attention.
And fixed the issue with the too long error (and other errors) not aborting immediately (#10355 (comment))
And renamed the autofix checkbox to agent mode

[gradio-pr-bot]

🪼 branch checks and previews

•	Name	Status	URL
	Spaces	ready!	Spaces preview
	Website	building...
	Storybook	ready!	Storybook preview
🦄	Changes	detecting...

---

Install Gradio from this PR

pip install https://gradio-pypi-previews.s3.amazonaws.com/c38ed695a72e6a0454886ddc0519f3df3224c76e/gradio-5.12.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@c38ed695a72e6a0454886ddc0519f3df3224c76e#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-npm-previews.s3.amazonaws.com/c38ed695a72e6a0454886ddc0519f3df3224c76e/gradio-client-1.10.0.tgz

Use Lite from this PR

<script type="module" src="https://gradio-lite-previews.s3.amazonaws.com/c38ed695a72e6a0454886ddc0519f3df3224c76e/dist/lite.js""></script>

[gradio-pr-bot]

🦄 change detected

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website	minor

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Playground fixes and refactoring

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