refactor: complete v2 refactoring plan (Phases 1-5)
Phase 1 — Quick Wins: centralize formatMoney/formatCents, extract findUniqueOrThrow helper (19 routers), shared Prisma select constants, useInvalidatePlanningViews hook, status badge consolidation, composite DB indexes. Phase 2 — Timeline Split: extract TimelineContext, TimelineResourcePanel, TimelineProjectPanel; split 28-dep useMemo into 3 focused memos. TimelineView.tsx reduced from 1,903 to 538 lines. Phase 3 — Query Performance: server-side filtering for getEntriesView, remove availability from timeline resource select, SSE event debouncing (50ms batch window). Phase 4 — Estimate Workspace: extract 7 tab components and 3 editor components. EstimateWorkspaceClient 1,298→306 lines, EstimateWorkspaceDraftEditor 1,205→581 lines. Phase 5 — Package Cleanup: split commit-dispo-import-batch (1,112→573 lines), extract shared pagination helper with 11 tests. All tests pass: 209 API, 254 engine, 67 application. Co-Authored-By: claude-flow <ruv@ruv.net>
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