Add splits for unreported expenses

[ZhenjaHorbach]

Explanation of Change

Fixed Issues

$ #72125
PROPOSAL:

Tests

1. Open App
2. Create an expense in the selfDM
3. Click 'More'
4. Verify that the user should see Split and then can create and edit split unreported expenses

• Verify that no errors appear in the JS console

Offline tests

QA Steps

// TODO: These must be filled out, or the issue title must include "[No QA]."

• 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)
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  • I verified that any callback methods that were added or modified are named for what the method does and never what callback they handle (i.e. toggleReport and not onIconClick)
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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:
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• I verified any variables that can be defined as constants (ie. in CONST.ts or at the top of the file that uses the constant) are defined as such
• 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
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• 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

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

[lakchote]

Found the backend issue, you provide reportID as 0 for selfDM in the request, and the backend thinks you haven't provided a report ID as a result @ZhenjaHorbach

[codecov]

Codecov Report

❌ Looks like you've decreased code coverage for some files. Please write tests to increase, or at least maintain, the existing level of code coverage. See our documentation here for how to interpret this table.

Files with missing lines	Coverage Δ
src/hooks/useSelectedTransactionsActions.ts	75.90% <100.00%> (ø)
src/hooks/useSplitEffectivePolicy.ts	100.00% <100.00%> (ø)
src/libs/ReportSecondaryActionUtils.ts	94.54% <100.00%> (+0.24%)	⬆️
src/libs/ReportUtils.ts	82.45% <100.00%> (+0.02%)	⬆️
src/libs/actions/IOU/UpdateMoneyRequest.ts	60.97% <100.00%> (+0.36%)	⬆️
src/libs/actions/IOU/index.ts	83.96% <100.00%> (+0.64%)	⬆️
...c/components/ReportActionItem/MoneyRequestView.tsx	65.45% <0.00%> (ø)
src/hooks/useExpenseActions.ts	0.00% <0.00%> (ø)
src/hooks/useSearchBulkActions.ts	47.60% <0.00%> (ø)
src/libs/TransactionUtils/index.ts	84.21% <66.66%> (-0.06%)	⬇️
... and 12 more
... and 16 files with indirect coverage changes

[melvin-bot]

@dmkt9 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]

[ZhenjaHorbach]

And try to reproduce this issue

• Cannot split the reverted transaction:

Video:
2026-04-12.15-32-41.mp4
After "Clear cache and restart", that transaction can be split.

Still can't reproduce this issue
Or it is possible that this bug has been fixed

Plus, I fixed a couple of new bugs that I found

I think it's ready for retesting

But I'll still try to figure out the issue above

[trjExpensify]

@dmkt9 can you re-review? In the meantime, @ZhenjaHorbach you've picked up a conflict.

[lakchote]

@ZhenjaHorbach please fix the conflicts

Can you please prioritize the re-review @dmkt9?

[dmkt9]

Can you please prioritize the re-review @dmkt9?

@lakchote Yes, I have taken a brief look at this. I will complete my review tomorrow.

[dmkt9]

@ZhenjaHorbach, please merge the latest main branch. I encountered a bug while testing that is unrelated to our PR; merging main should resolve this issue.

[dmkt9]

Bug:

• I can still see this bug:

I noticed that the backend does not support copying comments to split transactions. While the frontend does, it fails to update the comment counter in the transaction preview.

2026-04-22.17-54-39.mp4

---

• I can still see this bug:

• The split label is still displayed incorrectly when splitting the unreported distance expense from the workspace by date:

2026-04-22.16-36-28.mp4

---

• The split label is still displayed incorrectly when splitting an unreported distance expense from a workspace with a deleted distance rate. Regarding this bug, I think you can use the P2P rate directly, as mentioned in my previous comment (consistent with the behavior for splitting workspace expenses):

2026-04-22.16-39-36.mp4

---

• The back navigation flow is broken after splitting the expense:

2026-04-22.17-44-52.mp4

[dmkt9]

I found the bug, which also occurs on staging, but it will be more noticeable with our PR:

2026-04-22.18-33-40.mp4

[ZhenjaHorbach]

I found the bug, which also occurs on staging, but it will be more noticeable with our PR:

2026-04-22.18-33-40.mp4

Which command is called when you remove the last workspace split?

[ZhenjaHorbach]

I noticed that the backend does not support copying comments to split transactions. While the frontend does, it fails to update the comment counter in the transaction preview.

I'm a bit confused
Optimistically and after BE's response, the result is the same

[ZhenjaHorbach]

I found the bug, which also occurs on staging, but it will be more noticeable with our PR:

2026-04-22.18-33-40.mp4

About this
I updated the logic a bit
But now we have a BE issue
But I wrote Lucien about it

[ZhenjaHorbach]

I noticed that the backend does not support copying comments to split transactions. While the frontend does, it fails to update the comment counter in the transaction preview.

I'm a bit confused Optimistically and after BE's response, the result is the same

And this issue is left

[lakchote]

I found the bug, which also occurs on staging, but it will be more noticeable with our PR:

About this I updated the logic a bit But now we have a BE issue But I wrote Lucien about it

PR has been created, waiting for review/merge/deploy now.

[dmkt9]

I noticed that the backend does not support copying comments to split transactions. While the frontend does, it fails to update the comment counter in the transaction preview.

I'm a bit confused Optimistically and after BE's response, the result is the same

This is because the backend does not currently support it.

[lakchote]

PR to fix the copied comments/replies counter for selfDM is up for review

[lakchote]

Both backend PRs got merged, now waiting for the deploy

[lakchote]

@ZhenjaHorbach it should be good now

[lakchote]

@ZhenjaHorbach any update?