Add/csv import options (#420)

* feat(import): add customer and supplier parsing functionality

- Implemented customer file parsing in `lib/import/customers/parser.ts` with support for Excel and CSV formats.
- Created types for detected customer columns and parsed customer rows in `lib/import/customers/types.ts`.
- Added tests for customer classification logic in `lib/import/shared/__tests__/classify.test.ts`.
- Developed classification functions for customers and suppliers in `lib/import/shared/classify.ts`.
- Introduced shared column utility functions in `lib/import/shared/column-utils.ts`.
- Implemented supplier file parsing in `lib/import/suppliers/parser.ts` with validation for various fields.
- Created types for detected supplier columns and parsed supplier rows in `lib/import/suppliers/types.ts`.
- Added tests for supplier column detection and parsing in `lib/import/suppliers/__tests__/column-detector.test.ts` and `lib/import/suppliers/__tests__/parser.test.ts`.

* fix(labels): update 'Svenskt företag' to 'Svenskt företag eller organisation' for clarity

* feat(import): refactor encoding handling for Swedish files and add tests for character preservation

* feat(recapt): implement clearRecaptIdentity function and integrate into logout flow

* feat(bookkeeping): implement copy functionality and next voucher sequence retrieval

* feat(import): enhance customer and supplier import functionality with normalization and event handling

lib/events/handlers/event-log-handler.ts

@@ -24,6 +24,7 @@ const PERSISTED_EVENT_TYPES: CoreEventType[] = [
   'period.locked',
   'period.year_closed',
   'customer.created',
+  'supplier.created',
   'receipt.matched',
   'receipt.confirmed',
   'supplier_invoice.registered',
@@ -52,7 +53,7 @@ const PERSISTED_EVENT_TYPES: CoreEventType[] = [
 function extractEntityId(payload: Record<string, unknown>): string | null {
   // Try common entity shapes in priority order
   const entityKeys = [
-    'entry', 'invoice', 'transaction', 'customer', 'receipt',
+    'entry', 'invoice', 'transaction', 'customer', 'supplier', 'receipt',
     'supplierInvoice', 'creditNote', 'period', 'document', 'inboxItem',
   ] as const
 

lib/events/types.ts

@@ -3,6 +3,7 @@ import type {
   Invoice,
   Transaction,
   Customer,
+  Supplier,
   FiscalPeriod,
   DocumentAttachment,
   Receipt,
@@ -40,6 +41,8 @@ export type CoreEvent =
   | { type: 'period.year_closed'; payload: { period: FiscalPeriod; userId: string; companyId: string } }
   // Customers
   | { type: 'customer.created'; payload: { customer: Customer; userId: string; companyId: string } }
+  // Suppliers
+  | { type: 'supplier.created'; payload: { supplier: Supplier; userId: string; companyId: string } }
   // Receipts
   | { type: 'receipt.extracted'; payload: {
       receipt: Receipt;