fix: Start & End date does not matches Title format with Trip-based Auto-reporting

[TaduJR]

Explanation of Change

1. TRIP end date used currentDate instead of newest transaction (Formula.ts) — getAutoReportingDates now calls getNewestTransactionDate() for the TRIP end date so it reflects the actual last expense date, not today's date.

2. Optimistic transactions invisible to date helpers (Formula.ts) — getAllReportTransactionsWithContext now merges context.allTransactions (passed by computeOptimisticReportName). Previously it only handled context.transaction (singular), so transactions not yet in Onyx were invisible during optimistic updates. Also wired context through computeAutoReportingInfo → getAutoReportingDates → date helpers.

3. Wrong formula engine and blocked guard for existing reports (IOU/index.ts) — maybeUpdateReportNameForFormulaTitle now uses computeOptimisticReportName (full Formula engine that supports {report:autoreporting:*}) instead of populateOptimisticReportFormula (regex replacer that strips them). The guard now falls back to policy.fieldList when reportNameValuePairs doesn't exist yet (optimistic reports). The call is moved after STEP 3 so the optimistic transaction is available for formula computation.

Fixed Issues

$ #74268
PROPOSAL:

Tests

Preconditions:

• Enable custom report names beta in OldDot staging console: SSetNameValuePair('useCustomReportNamesNewExpensify', 'true')
• Create a workspace with auto-reporting frequency set to By trip
• Set the report title formula to: Trip from {report:autoreporting:start:MMM dd} to {report:autoreporting:end:MMM dd, yyyy}

Online:

1. Create an expense with a past date (e.g., Jan 1)
2. Create another expense with a different date (e.g., Jan 15)
3. Verify the report title shows Trip from Jan 01 to Jan 15, 2025 (matching actual transaction dates)

Offline (optimistic):
4. Go offline (toggle airplane mode or disconnect network)
5. Open an existing report that already has an expense dated Jan 1
6. Create a new expense with date Jan 20
7. Verify the report title immediately updates to Trip from Jan 01 to Jan 20, 2025 (not today's date)

New report offline:
8. While still offline, create a new expense in a new report with date Feb 10
9. Verify the report title shows Trip from Feb 10 to Feb 10, 2025

Scan expense regression check (#86839):

10. Go to the workspace chat
11. Create an empty report
12. Open the newly created report
13. Add a scan expense
14. Verify the report title does not flash raw formula text like {report:startdate} while SmartScan is processing

• Verify that no errors appear in the JS console

Offline tests

Same as tests

QA Steps

// TODO: These must be filled out, or the issue title must include "[No QA]."
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
  • MacOS: Desktop
• 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 verified there are no new alerts related to the canBeMissing param for useOnyx
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    • 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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Screenshots/Videos

Android: Native

Android-Native.mp4

Android: mWeb Chrome

Android-mWeb.mp4

iOS: Native

iOS-Native.mp4

iOS: mWeb Safari

iOS-Safari.mp4

MacOS: Chrome / Safari

output.mp4

MacOS: Desktop

Mac-Desktop-3.mp4

[melvin-bot]

@mananjadhav 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]

[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/libs/Formula.ts	89.18% <93.75%> (+1.37%)	⬆️
src/libs/actions/IOU/index.ts	78.36% <33.33%> (-0.30%)	⬇️
... and 21 files with indirect coverage changes

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[JmillsExpensify]

Fix looks good to product