chore(ONYX-1956): edit title of the latest auction results screen to use Palette AnimatedHeader

[dariakoko]

This PR resolves ONYX-1956

Description

Updated the header of the auction results screens to use Palette's Screen.AnimatedHeader and Screen.StickySubHeader.
To enable Screen.AnimatedHeader and Screen.StickySubHeader, I replaced the Animated.SectionList component with Screen.FlatList. This required additional adjustments to preserve the existing sticky auction-date component behavior.

Before	After iOS	After Android
	Simulator.Screen.Recording.-.iPhone.13.mini.-.2026-01-16.at.16.20.13.mp4	auctions.screens.header.webm

PR Checklist

• I have tested my changes on the following platforms:
  • Android.
  • iOS.
• I hid my changes behind a feature flag, or they don't need one.
• I have included screenshots or videos at least on Android, or I have not changed the UI.
• I have added tests, or my changes don't require any.
• I added an app state migration, or my changes do not require one.
• I have documented any follow-up work that this PR will require, or it does not require any.
• I have added a changelog entry below, or my changes do not require one.

To the reviewers 👀

• I would like at least one of the reviewers to run this PR on the simulator or device.

Changelog updates

Changelog updates

Cross-platform user-facing changes

• updated Auctions screen header to use Screen.AnimatedHeader and Screen.StickySubHeader

iOS user-facing changes

Android user-facing changes

Dev changes

• edit title of the latest auction results screen to use Palette AnimatedHeader

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[Copilot]

Pull request overview

This PR refactors auction results screens to use Palette's AnimatedHeader component instead of a custom floating header implementation. The change converts a SectionList-based implementation to a FlatList-based one with manual sticky header management.

Changes:

• Replaced custom floating header with Screen.AnimatedHeader and Screen.StickySubHeader components
• Converted SectionList to FlatList with custom viewability tracking for sticky section headers
• Removed ListHeaderComponent prop and floatingHeaderTitle prop from AuctionResultsList

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 8 comments.

File	Description
AuctionResultsForArtistsYouCollect.tsx	Updated to use Screen.AnimatedHeader and Screen.Body wrapper components
AuctionResultsScreenWrapper.tsx	Updated to use Screen.AnimatedHeader and Screen.Body wrapper components, removed ListHeader usage
AuctionResultsList.tsx	Major refactoring from SectionList to FlatList with custom sticky header logic and viewability tracking

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[Copilot]

Skipping the first section header (index === 0) assumes that the first item is always a section header. If the auctionResults array is empty or in an unexpected state, this could cause issues. Consider checking if the item type is 'section-header' rather than just checking the index.

[dariakoko]

This is correct - given the current flatListData builder, for a non-empty auctionResults the code always pushes a section header before the group's items, so the first element will be a "section-header"

[ArtsyOpenSource]

This PR contains the following changes:

• Cross-platform user-facing changes (updated Auctions screen header to use Screen.AnimatedHeader and Screen.StickySubHeader - dariakoko)
• Dev changes (edit title of the latest auction results screen to use Palette AnimatedHeader - dariakoko)

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