Largest controller at 831 lines. Integrates with jQuery-based Filters, GroupBys, Controls global interfaces. Manages complex UI state for the cost reporting page. The implementation is the interface — no seams, no decomposition points. Untestable in isolation.

Begin of the insertion~~ExtractEnd of the insertion Begin of the deletion ExtractEnd of the deletion jQuery interop into adapter Begin of the insertionmodules.~~ Remove remainders of jQuery?.End of the insertion Begin of the deletion modules.End of the deletion Decompose the controller into focused sub-controllers (filter management, grouping, table rendering) connected via outlets. Each sub-controller becomes independently testable.