Fix frontend errors on ApiDocs and RecordingSnippet

[whitphx]

Description

Found these errors and this PR fixes them.

API recorder

After recording the API calls, the api call sample code should be displayed but wasn't.

Before	This PR

Close button

Clicking this close button causes this error in the dev console.

Blocks.svelte:809 Uncaught TypeError: Cannot read properties of null (reading 'api_recorder_visible')
    at Do.Ws (Blocks.svelte:809:42)
    at svelte.js:2042:40
    at Array.forEach (<anonymous>)
    at Do.bubble (svelte.js:2042:21)
    at Do.k (ApiDocs.svelte:96:35)
    at svelte.js:1966:8
    at Array.forEach (<anonymous>)
    at svelte.js:1965:22
    at HTMLButtonElement.a (ApiBanner.svelte:38:25)

[gradio-pr-bot]

🪼 branch checks and previews

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

---

Install Gradio from this PR

pip install https://gradio-pypi-previews.s3.amazonaws.com/63d2c059f5b516539a5f5729fd4109e5ce5c6d57/gradio-5.4.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@63d2c059f5b516539a5f5729fd4109e5ce5c6d57#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-npm-previews.s3.amazonaws.com/63d2c059f5b516539a5f5729fd4109e5ce5c6d57/gradio-client-1.7.1.tgz

Use Lite from this PR

<script type="module" src="https://gradio-lite-previews.s3.amazonaws.com/63d2c059f5b516539a5f5729fd4109e5ce5c6d57/dist/lite.js""></script>

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
@gradio/core	minor
gradio	minor

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

With the following changelog entry.

Fix frontend errors on ApiDocs and RecordingSnippet

Maintainers or the PR author can modify the PR title to modify this entry.

Something isn't right?

• Maintainers can change the version label to modify the version bump.
• If the bot has failed to detect any changes, or if this pull request needs to update multiple packages to different versions or requires a more comprehensive changelog entry, maintainers can update the changelog file directly.

[aliabd]

@whitphx is this still meant to be in draft?

I tried and confirmed it fixes the first error. Guess we forgot about api_prefix here when we merged 5.0

I couldn't actually reproduce the error with the close button, though the change looks good to me!

[whitphx]

@aliabd sorry this is ready for review, and you already approved it, thanks.