Fix Storybook crash from useNavigation mock

[MelvinBot]

Explanation of Change

SearchContextProvider imports useNavigation from @react-navigation/core, but Storybook's webpack mock config only aliases @react-navigation/native. The real useNavigation runs, finds no NavigationContainer, and throws — crashing every story.

Additionally, the existing native mock exported useNavigation as a plain object instead of a function, so even if the import were routed through the mock, calling useNavigation() would throw TypeError: useNavigation is not a function.

This PR:

1. Changes SearchContext.tsx to import useNavigation from @react-navigation/native instead of @react-navigation/core (they resolve to the same function in production; @react-navigation/native is the codebase convention with 373 files vs 8 importing from core)
2. Fixes the native mock's useNavigation to be a callable function returning a navigation-shaped object, instead of a plain object literal

Fixed Issues

$ #89538

Tests

// TODO: The human co-author must fill out the tests you ran before marking this PR as "ready for review"

• Verify that no errors appear in the JS console

Offline tests

N/A — changes are limited to Storybook/test scaffolding and a behaviorally-identical import swap.

QA Steps

// TODO: The human co-author must fill out the QA tests you ran before marking this PR as "ready for review".

• 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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    • 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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• 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

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

[MelvinBot]

Fixed the failing check: The test TransactionGroupListItemTest was failing with TypeError: navigation.getState is not a function because the local useNavigation mock for @react-navigation/native was missing getState. Added it to match what SearchContext.tsx now expects after the import was changed from @react-navigation/core to @react-navigation/native.

[MelvinBot]

The dryRun failure is not code-related — it's a transient GitHub Actions infrastructure issue. The git checkout step failed 3 times with GnuTLS recv error (-24): Decryption has failed (a TLS network error on GitHub's runners). The "Something you did broke scripts/generateTranslations.ts" message is a misleading fallback that always prints when any prior step in that workflow fails.

The prior Jest test failure (navigation.getState is not a function) was already fixed in commit 17398f7. The latest test run is still in progress.

Action needed: Please re-run the failed dryRun check — I don't have permission to trigger workflow re-runs.

[MelvinBot]

The dryRun check failure is not related to this PR's code changes — it's a transient GitHub Actions infrastructure error.

The actual failure is a TLS network error during git fetch:

error: RPC failed; curl 56 GnuTLS recv error (-24): Decryption has failed.
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

The checkout step failed 3 times due to this network issue, and the subsequent "broke scripts/generateTranslations.ts" error message is a hardcoded fallback that fires whenever the workflow fails for any reason — it does not reflect the actual cause.

Fix: Re-run the failed dryRun workflow to resolve this.