fix: rounds down the min received amount in swaps

[ghgoodreau]

Description

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CHANGELOG entry:

Related issues

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Manual testing steps

Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]

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• [ ] I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• [ ] I've completed the PR template to the best of my ability
• [ ] I’ve included tests if applicable
• [ ] I’ve documented my code using JSDoc format if applicable
• [ ] I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

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• [ ] I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
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---

[!NOTE] Adds a formatter that floors minimum received to 8 decimals and uses it in QuoteDetailsCard, with unit tests.

• Bridge Utils:
  • Add formatMinimumReceived in utils/currencyUtils to floor values to 8 decimals and format via locale.
  • Add tests in utils/currencyUtils.test.ts covering flooring behavior, string parsing, invalid input, and locale usage.
• UI:
  • Update components/QuoteDetailsCard/QuoteDetailsCard.tsx to use formatMinimumReceived for displaying minimum_received, replacing direct intl formatting.

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[github-actions[bot]]

🔍 Smart E2E Test Selection

• Selected E2E tags: SmokeTrade
• Risk Level: low
• AI Confidence: 90%

click to see 🤖 AI reasoning details

The changes are focused on a specific utility function for formatting minimum received amounts in the Bridge feature. The modifications include:

1. A new formatMinimumReceived() function in currencyUtils.ts that floors values to 8 decimal places to ensure users never see a minimum higher than they might receive
2. Refactoring QuoteDetailsCard.tsx to use this new centralized utility function
3. Unit tests for the new function

This is a low-risk change because:

• It's a localized formatting change that doesn't affect core business logic
• The function has proper unit test coverage
• The change improves accuracy by flooring instead of standard rounding
• It's purely a display/UX refinement

The SmokeTrade tag is appropriate as it covers Bridge functionality (verified via bridge-action-smoke.spec.ts which uses SmokeTrade). The QuoteDetailsCard is also referenced by Perps components, but the formatting change primarily impacts the Bridge flow where it's directly integrated.

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[sonarqubecloud[bot]]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud