Hide memo row on unrelated operations

[leofelix077]

Closes #694

iOS Build 1775473054 📱

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Checklist

PR structure

• This PR does not mix refactoring changes with feature changes (break it down into smaller PRs if not).
• This PR has reasonably narrow scope (break it down into smaller PRs if not).
• This PR includes relevant before and after screenshots/videos highlighting these changes.
• I took the time to review my own PR.

Testing

• These changes have been tested and confirmed to work as intended on Android.
• These changes have been tested and confirmed to work as intended on iOS.
• I have tried to break these changes while extensively testing them.
• This PR adds tests for the new functionality or fixes.

Release

• This is not a breaking change.
• This PR updates existing JSDocs when applicable.
• This PR adds JSDocs to new functionalities.
• I've checked with the product team if we should add metrics to these changes.
• I've shared relevant before and after screenshots/videos highlighting these changes with the design team and they've approved the changes.

[Copilot]

Pull request overview

This PR updates the History transaction details bottom sheet to avoid showing the “Memo” row for transaction types where the memo isn’t intended to be surfaced, while preserving the existing behavior of hiding memo for muxed (M...) destinations.

Changes:

• Added a shouldShowMemo() helper to centralize the memo-row visibility rule.
• Updated TransactionDetailsBottomSheetCustomContent to use shouldShowMemo() (show only for Payment/CreateAccount and non-muxed destinations).
• Added unit tests covering the memo visibility logic.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/components/screens/HistoryScreen/TransactionDetailsBottomSheetCustomContent.tsx	Uses the new helper to conditionally include the memo row only for relevant transaction types / destinations.
src/components/screens/HistoryScreen/helpers.tsx	Adds shouldShowMemo() and documentation describing the display rule.
src/components/screens/HistoryScreen/helpers.test.ts	Adds Jest coverage for shouldShowMemo() across classic/non-classic transaction types and muxed/non-muxed destinations.

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