Fix RHP scroll for expenses with many fields on web

[mountiny]

Explanation of Change

On web, MoneyRequestView had a web-only overflowY: 'auto' style (via overflowMoneyRequestView) that created a CSS scroll container. Since MoneyRequestView has no constrained height, this never provided actual scrolling — no scrollbar ever appeared. However, making it a scroll container could cause browsers to capture wheel events and prevent them from propagating to the parent InvertedFlatList, blocking the user from scrolling to see expense fields below the fold.

This PR removes the web-only overflowX: 'hidden' and overflowY: 'auto' styles, making the web implementation match the native one (which already uses {}).

MoneyRequestView is always rendered inside a scrollable parent (InvertedFlatList, SelectionList, or ScrollView), so it never needs its own overflow handling.

Fixed Issues

$ #81195

Tests

1. Open a report that contains multiple expenses
2. Click on an individual expense to open it in the RHP
3. Use an expense that has many fields enabled (Locations, Categories, Tags, Tax, Classes)
4. Verify you can scroll down to see all expense fields in the RHP
5. Verify chat messages in the transaction thread still scroll normally
6. Verify the multi-expense report table view still scrolls
7. Open a duplicate review or merge transaction page — verify MoneyRequestView content is fully visible

• Verify that no errors appear in the JS console

Offline tests

N/A — this is a CSS-only change affecting scroll event propagation.

QA Steps

1. Open a report with multiple expenses (ensure the workspace has Locations, Categories, Tags, Tax, Classes enabled)
2. Click on an individual expense to view it in the RHP
3. On a viewport that isn't very tall, verify you can scroll to see all expense detail fields
4. Verify chat messages in a transaction thread still scroll normally
5. Verify the multi-expense report table view still scrolls

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
  • I added steps for the expected offline behavior in the Offline steps section
  • I added steps for Staging and/or Production testing in the QA steps section
  • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
  • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
  • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
• I included screenshots or videos for tests on all platforms
• I ran the tests on all platforms & verified they passed on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
• I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
• I followed proper code patterns (see Reviewing the code)
• I verified that if a function's arguments changed that all usages have also been updated correctly
• I tested other components that can be impacted by my changes (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar are working as expected)
• I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)

Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

Made with Cursor

[codecov]

Codecov Report

✅ Changes either increased or maintained existing code coverage, great job!

Files with missing lines	Coverage Δ
src/styles/utils/overflowMoneyRequestView/index.ts	0.00% <0.00%> (ø)
... and 8 files with indirect coverage changes

[github-actions]

🚧 @mountiny has triggered a test Expensify/App build. You can view the workflow run here.

[github-actions]

🧪🧪 Use the links below to test this adhoc build on Android, iOS, and Web. Happy testing! 🧪🧪
Built from App PR #83773.

Android 🤖	iOS 🍎
https://ad-hoc-expensify-cash.s3.us-east-1.amazonaws.com/rock-artifacts/ad-hoc/rock-android-Adhoc-8d1c39d-8ca3480-dc822c6f45aa1f84d81f3ae6196f07a4306afb28/index.html	https://ad-hoc-expensify-cash.s3.us-east-1.amazonaws.com/rock-artifacts/ad-hoc/rock-ios-device-AdHoc-8d1c39d-8ca3480-d01d46958e4893317b51dc4b466687b660e8b45d/index.html

Web 🕸️
https://83773.pr-testing.expensify.com

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