add an input for the URL in hyparquet demo

[severo]

[Copilot]

Pull Request Overview

This PR adds a URL input field to the hyparquet demo, allowing users to manually enter a parquet file URL to load. Similar functionality appears to already exist in the icebird demo.

• Added a form with URL input and Load button to the hyparquet Welcome component
• Added CSS styles for form inputs, labels, and input groups
• Connected the Welcome component to the existing URL loading mechanism via the onUrlDrop callback

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
hyparquet/src/Welcome.tsx	Added Props interface, URL input form with submit handler that calls setUrl
hyparquet/src/App.tsx	Passed onUrlDrop as setUrl prop to Welcome component
hyparquet/src/index.css	Added styling for label, input, textarea, and inputGroup elements
icebird/src/Welcome.tsx	Removed urlRef from useCallback dependency array

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[Copilot]

The useCallback dependency array is missing exampleUrl and urlRef. While urlRef is a ref and stable, exampleUrl is a local constant that's captured in the closure. Since exampleUrl is defined inside the component function, it should be included in the dependency array, or moved outside the component to avoid this issue. To fix, either add exampleUrl to the dependencies: }, [setUrl, exampleUrl]) or move the exampleUrl constant declaration outside the component function.

Suggested change

	}, [setUrl])
	}, [setUrl, exampleUrl])

[platypii]

Not sure why a const needs to be in the dependency array. If you move the exampleUrl to the top level then I think it will stop complaining?

[severo]

no, the comment does not make sense to me. Anyway, moving outside does not harm either