[Due for payment 2026-06-16] [Search Decomp M1-A] Drop screen-level live merge: reportActions/allReportMetadata + row capabilities

[mountiny]

Part of

Tracking: Search screen decomposition — eliminate parallel double-merge (perf)

What needs to be done

This is the first PR in the Search screen decomposition (Milestone 1, Wave A):

• Drop reportActions, exportReportActions, allReportMetadata, reportAttributesDerivedValue from <Search> and getSections — these were the highest-churn parallel merge inputs
• Replace array-valued allActions field on row items with four primitive capability booleans (canPay / canApprove / canSubmit / canChangeApprover) for React Compiler-stable value tracking
• Introduce useLiveRowCapabilities hook: row-level live recompute so primary action buttons reflect real Onyx state, not snapshot-stale values
• Replace applySelectionToItem with useRowSelection per-row selection reads; delete the screen-level selection dep on renderItem

Expected outcome

• SPAN_OPEN_REPORT P90 improved
• Row-tap no longer reconciles all visible rows in the same frame
• Measured: -20.5% total commit duration, -20.7% components rendered on row-tap

PR

#91438

Issue Owner

Current Issue Owner: @mallenexpensify