Fix/96314 deleted linked action flash

[yusufdeveloper2903]

Explanation of Change

When a deep link points to a report action that has been deleted (or is otherwise not visible), LinkedActionNotFoundGuard used to render a FullPageNotFoundView ("hmm... it's not here"). On native this caused a brief flash of the "not found" page before the auto-recovery effect could run (NativeStackView commits UI synchronously before the effect fires), and the behavior was inconsistent when opening the link from a self DM.

This PR removes the unreachable "not found" page entirely. The guard now only runs the recovery effects and returns children. When the linked action is not found, useAutoNavigateForDeletedLinkedAction clears the stale reportActionID param in a useLayoutEffect (runs before paint), so the user is taken straight to the end of the report with no flash and consistent behavior across entry points.

Fixed Issues

$ #96314
PROPOSAL: #96314 (comment)

Tests

1. Open a workspace chat, send a message, and copy its link.
2. Delete the original message.
3. Tap the link.
4. Verify you are taken to the end of the report and the "hmm... it's not here" page does NOT flash.
5. Send the same link in a self DM and tap it.
6. Verify it navigates to the correct report and behaves the same (no flash, end of report).
7. Verify that no errors appear in the JS console.

• Verify that no errors appear in the JS console

Offline tests

Same as 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
• 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 followed the guidelines as stated in the Review Guidelines
• 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)
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  • A similar style doesn't already exist
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• If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
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• 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

After fix:

REC-20260730161758.mp4

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

[melvin-bot]

@truph01 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]

[yusufdeveloper2903]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Another round soon, please!

Reviewed commit: 958d072e8f

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