Add unit tests for the XLM price formatter rendering the correct number of decimal places across different values

[Chucks1093]

Summary

XLM prices are displayed throughout the app with two decimal places. Unit tests should confirm the formatter handles whole numbers, fractional values, and very small values without floating-point rounding errors.

Scope

• Test 10 XLM formats as '10.00 XLM'
• Test 0.5 XLM formats as '0.50 XLM'
• Test 0.001 XLM formats as '0.00 XLM' (rounded to 2 dp)
• Test 1000.999 XLM formats as '1001.00 XLM'
• Test 0 XLM formats as '0.00 XLM'

Acceptance Criteria

• Whole number formatted with two decimal places
• Fractional value formatted correctly
• Very small value rounded to 2dp without crashing
• Zero formatted as '0.00 XLM'

ETA: 12 hours

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Coordinate on Telegram

[olu-cmd]

@olu-cmd has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Can i please work on this

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[Paulotoide]

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I would like to work on this issue

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[d1a-m3n]

@d1a-m3n has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I’d like to work on this issue to contribute to the project. I’ll review the requirements, implement the necessary changes, test them properly, and ensure everything works as expected.

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[Mosas2000]

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Hi maintainer, will appreciate you letting me work on this.

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[shinorh247]

@shinorh247 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Ho maintainer, I would like to work on this issue

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