Add shared components (ConfirmDeleteDialog, EditEntryDialog, validation utils),
enhance all 12 extension workspaces with edit/delete dialogs, input validation,
period comparisons, and new analytics features. Fix critical bugs in
ProjectBilling margin calculation and EarningsPerLiter revenue allocation.
Add pure calculation modules with 183 new tests across all extensions.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add test coverage for invoices, transactions, bookkeeping, and supplier
invoice API routes. Includes test helpers (createMockRequest,
parseJsonResponse, createMockRouteParams, createQueuedMockSupabase) and
fixture factories (makeInvoice, makeCustomer, makeSupplier,
makeSupplierInvoice, makeCompanySettings).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
