fix: handle empty input state in Geez numerals demo

[NatnaelMalike]

• Clear input field properly when all characters are deleted
• Return empty string for zero/empty input in toEthNumber
• Improve input handling to reset state correctly

[vercel]

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[gemini-code-assist]

Summary of Changes

Hello @NatnaelMalike, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a user experience issue in the Geez numerals demo by refining how empty input states are managed. Previously, deleting all characters might have left a '0' or an invalid conversion displayed. The changes ensure that when the input field is cleared, the demo correctly reflects an empty state, making the interaction smoother and more predictable for users.

Highlights

• Empty Input Handling: The demo now correctly clears the input field when all characters are deleted, providing a more intuitive user experience.
• Geez Numeral Conversion: The toEthNumber function has been updated to return an empty string when the input is zero or effectively empty, preventing '0' from being displayed when the field is cleared.
• State Management: Input handling logic has been improved to properly reset the component's state when the input field becomes empty.

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[gemini-code-assist]

Code Review

This pull request addresses an issue with handling empty input in the Geez numerals demo component. The changes correctly handle clearing the input field by using 0 as an internal state representation for an empty value. The toEthNumber function is updated to return an empty string for 0, and the input component is updated to display an empty string when the state is 0. My review identifies one logic issue where typing '0' into the input field does not update the state correctly, leading to a poor user experience. I've included a suggestion to resolve this.

[gemini-code-assist]

The current logic prevents the user from setting the input to 0. If a user types 0, parseInt will correctly parse it, but the condition value >= 1 will evaluate to false, and setInputNumber will not be called. This results in the component's state not being updated, and the input field will revert to its previous value on the next render, which is a confusing user experience.

Since 0 is used to represent the empty state in this component, you should allow setInputNumber(0) to be called when the user types 0. This will make the behavior consistent with clearing the input field.

Suggested change

	if (!isNaN(value) && value >= 1 && value <= 1000000) {
	setInputNumber(value);
	}
	if (!isNaN(value) && value >= 0 && value <= 1000000) {
	setInputNumber(value);
	}