FIX: remove commas before format vault balance in usd

[pedroanastacio]

Description

If the vault balance in USD is in the thousands or higher, the balance is displayed as NaN on the vault card

Summary

• Remove commas before format vault balance in USD

Checklist

• I reviewed my PR code before submitting
• I ensured that the implementation is working correctly and did not impact other parts of the app
• I implemented error handling for all actions/requests and verified how they will be displayed in the UI (or there was no error handling needed).
• I mentioned the PR link in the task

[guimroque]

Code Review

Summary

The fix addresses a NaN display issue when formatting vault balances in USD with commas. The solution removes commas before parsing the number, which resolves the formatting problem. However, there are some implementation concerns around the utility function usage and formatting configuration.

Strengths

• Good use of useMemo for performance optimization in formatting calculations
• Proper null coalescing with fallback to '0' for undefined balances
• Clean import organization following project standards

Issues

• 1 important issue around potential utility function misuse

[aws-amplify-us-east-1]

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