[$250] Decompose MoneyRequestConfirmationListFooter into field groups and hooks

[pecanoro]

MoneyRequestConfirmationListFooter has grown to ~850 lines, mixing the orchestration of 13 fields, derived-flag computation, receipt-source resolution, and compact-mode layout into a single component. This makes the file difficult to maintain, test in isolation, and reason about.

We should extract the logic into focused field groups and hooks:

• ConfirmationFieldList — slim orchestrator owning the "Show more" button + Sparkles header
• fieldGroups/TransactionDetailsFields — Amount, Description, Distance, Rate, Merchant, Time
• fieldGroups/ClassificationFields — Category, Date, Tags, Tax, Attendees
• fieldGroups/SettingsFields — Toggles + ReportField; gates ReportField's 5 Onyx subscriptions behind isPolicyExpenseChat
• hooks/useFooterDerivedFlags — derived flag chain pulled out of the footer body
• hooks/useReceiptThumbnailSource — receipt-source resolution + first-render capture (Compiler-compliant useState pattern)
• hooks/useFooterTagVisibility, hooks/useCompactReceiptDimensions — small isolated derivations
• ConfirmationReceiptThumbnail — receipt area as a dedicated subtree

This is a pure refactor with no behavioral changes. The confirmation screen should render all fields identically before and after.

Related: Part of the broader performance effort in #81849

Issue Owner

Current Issue Owner: @mallenexpensify

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• Upwork Job URL: https://www.upwork.com/jobs/~022049860478868205937
• Upwork Job ID: 2049860478868205937
• Last Price Increase: 2026-04-30

[melvin-bot]

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