Write tests for formatUsdc utility

[ayshadogo]

Description:

• Create lib/utils/formatUsdc.ts — formatUsdc(amount: number): string returns "12.50 USDC"
• Test: formatUsdc(12.5) → "12.50 USDC"
• Test: formatUsdc(0) → "0.00 USDC"
• Test: formatUsdc(1000000) → "1,000,000.00 USDC"

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[Leemxiey]

@Leemxiey has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Good day Big Dev! Pls I would love to work on this issue carefully and make PR today

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[akinerin]

@akinerin has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Please assign me this task, I can work on it quickly

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[memplethee-lab]

@memplethee-lab has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi Maintainer,

I’m a full-stack developer, and I’d like to contribute to the task. I’ll implement it carefully and efficiently thoroughly understand requirements and edge cases
Communicate promptly about suggestions or improvements. And I will provide regular progress updates and address blockers
Align with project goals through feedback and clarification.

Thank you,

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