feat(fund): Add unit test for hideIcon prop in FundButton component

[aspekt19]

This PR adds a new unit test case to the FundButton component to ensure full test coverage for its props.

Specifically:

• Adds a test for the hideIcon prop, verifying that the fund icon is correctly removed from the DOM when hideIcon={true} is passed to the component.

This contribution helps to prevent future regressions related to the icon's visibility and contributes to maintaining the project's required 100% test coverage standard.

[cb-heimdall]

🟡 Heimdall Review Status

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Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[vercel]

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