Move STATUS_COLORS and PRIORITY_COLORS to constants/index.ts and
formatCurrency/formatDate/formatDateTime to lib/format.ts — previously
duplicated across 5 and 4 files respectively.
AdminDashboard: Wire Category and Priority filter dropdowns to
usePaginatedList extraParams (were no-op onChange handlers).
ProposalDetailPage: Add 'Revised' to STATUS_ORDER so the stepper
renders correctly for revised proposals.
