Description

Removed the lineHeight property from TextField Input styles introduced in #21199 to prevent unintended multi-line text wrapping in single-line input fields.

The lineHeight property (20px on iOS, 22px on Android), when combined with the overall input height, inadvertently allowed text to wrap to multiple lines in TextField components, even when multiline={false} was specified. This created an inconsistent user experience where single-line inputs would display text across multiple lines instead of scrolling horizontally for long text.

Related Slack discussion: https://consensys.slack.com/archives/C02U025CVU4/p1768489381842089?thread_ts=1768489381.842089&cid=C02U025CVU4

Changelog

CHANGELOG entry: Fixed a bug where TextField components could wrap text to multiple lines even when multiline={false}

Related issues

Fixes: #24586

Manual testing steps

Feature: TextField single-line input behavior

  Scenario: user enters long text in a single-line TextField
    Given the app is open with a TextField component where multiline={false}
    
    When user enters a long text string that exceeds the visible width
    Then the text should scroll horizontally within the input field
    And the text should not wrap to multiple lines

Screenshots/Recordings

Before

Text would wrap to multiple lines in single-line TextField

After

Text scrolls horizontally as expected

Pre-merge author checklist

• 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.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.