Expense - System message changes from "changed the attendees to.." to "set the attendees to.."

[lorretheboy]

Explanation of Change

Fixed Issues

$ #75653
PROPOSAL: #75653 (comment)

Tests

Precondition:

• Attendee tracking is enabled in workspace settings > Rules.
• Account has working self DM.

1. Go to staging.new.expensify.com
2. Go to self DM.
3. Click + > Create expense > Manual.
4. Enter amount > Next,
5. On confirm page, click Attendee.
6. Add another attendee and save it.
7. Click Create expense.
8. Open the expense thread.
9. Click Attendee field.
10. Add another attendee then turn off internet --> then save it.
11. Verify that System message should be "changed the attendees to y (previously x)".

• Verify that no errors appear in the JS console

Offline tests

QA Steps

Same as Tests

• 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
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  • I verified any copy / text shown in the product is localized by adding it to src/languages/* files and using the translation method
    • If any non-english text was added/modified, I used JaimeGPT to get English > Spanish translation. I then posted it in #expensify-open-source and it was approved by an internal Expensify engineer. Link to Slack message:
  • I verified all numbers, amounts, dates and phone numbers shown in the product are using the localization methods
  • I verified any copy / text that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is either coming verbatim from figma or has been approved by marketing (in order to get marketing approval, ask the Bug Zero team member to add the Waiting for copy label to the issue)
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• I verified that if a function's arguments changed that all usages have also been updated correctly
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  • The file has a description of what it does and/or why is needed at the top of the file if the code is not self explanatory
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  • A similar style doesn't already exist
  • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(theme.componentBG))
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• If a new page is added, I verified it's using the ScrollView component to make it scrollable when more elements are added to the page.
• I added unit tests for any new feature or bug fix in this PR to help automatically prevent regressions in this user flow.
• If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.

Screenshots/Videos

Android: Native

e-android.mov

Android: mWeb Chrome

website.android.mov

iOS: Native

e-ios.mov

iOS: mWeb Safari

website.ios.mov

MacOS: Chrome / Safari

website.mov

[codecov]

Codecov Report

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

Files with missing lines	Coverage Δ
src/libs/ModifiedExpenseMessage.ts	90.09% <0.00%> (ø)
... and 11 files with indirect coverage changes

[melvin-bot]

@Krishna2323 Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

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[chatgpt-codex-connector]

Make attendee message logic actually change behavior

This edit is behaviorally neutral: getFormattedAttendees() returns values in the same order as its arguments, and this patch swaps both the arguments and the tuple positions passed into buildMessageFragmentForValue(), so the final call still evaluates to newAttendees as new value and oldAttendees as old value just like before. In attendee-modification flows, the rendered system message will therefore be unchanged, so the intended copy fix is not actually applied.

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