feat(T06): Verkaufsmodul + Rechtsdokumente + DATEV-Export + Sales UI

frontend/lib/datev.ts

@@ -0,0 +1,31 @@
+import { apiFetch, type PaginatedResponse } from './api';
+
+export interface DATEVExportResponse {
+  id: string;
+  start_date: string;
+  end_date: string;
+  file_path?: string | null;
+  total_amount: number;
+  created_at?: string;
+}
+
+export interface DATEVExportCreate {
+  start_date: string;
+  end_date: string;
+}
+
+export async function createDatevExport(data: DATEVExportCreate): Promise<DATEVExportResponse> {
+  return apiFetch<DATEVExportResponse>('/datev/export', {
+    method: 'POST',
+    body: JSON.stringify(data),
+  });
+}
+
+export async function listDatevExports(page = 1, pageSize = 20): Promise<PaginatedResponse<DATEVExportResponse>> {
+  return apiFetch<PaginatedResponse<DATEVExportResponse>>(`/datev/exports?page=${page}&page_size=${pageSize}`);
+}
+
+export function getDatevDownloadUrl(id: string): string {
+  const baseUrl = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000/api/v1';
+  return `${baseUrl}/datev/exports/${id}/download`;
+}

frontend/lib/sales.ts

@@ -0,0 +1,121 @@
+import { apiFetch, type PaginatedResponse } from './api';
+
+export interface VehicleNested {
+  id: string;
+  make: string;
+  model: string;
+  fin: string;
+  vehicle_type: string;
+  availability: string;
+  price: number;
+}
+
+export interface ContactNested {
+  id: string;
+  company_name: string;
+  address_city?: string;
+  address_country: string;
+  vat_id?: string;
+  email?: string;
+  phone?: string;
+}
+
+export interface SaleResponse {
+  id: string;
+  vehicle_id: string;
+  buyer_contact_id: string;
+  seller_contact_id?: string | null;
+  sale_price: number;
+  sale_date: string;
+  status: string;
+  is_gwg: boolean;
+  contract_pdf_path?: string | null;
+  created_at?: string;
+  updated_at?: string;
+  vehicle?: VehicleNested;
+  buyer?: ContactNested;
+  seller?: ContactNested;
+}
+
+export interface SaleCreateData {
+  vehicle_id: string;
+  buyer_contact_id: string;
+  seller_contact_id?: string;
+  sale_price: number;
+  sale_date?: string;
+  status?: string;
+  is_gwg?: boolean;
+}
+
+export interface SaleUpdateData {
+  sale_price?: number;
+  sale_date?: string;
+  status?: string;
+  is_gwg?: boolean;
+  seller_contact_id?: string;
+}
+
+export interface SaleListParams {
+  page?: number;
+  page_size?: number;
+  status?: string;
+  date_from?: string;
+  date_to?: string;
+}
+
+export interface ContractResponse {
+  sale_id: string;
+  contract_pdf_path: string;
+  message: string;
+}
+
+export interface UstIdVerifyResponse {
+  verified: boolean;
+  message: string;
+  vat_id?: string | null;
+}
+
+export async function listSales(params: SaleListParams = {}): Promise<PaginatedResponse<SaleResponse>> {
+  const query = new URLSearchParams();
+  if (params.page) query.set('page', String(params.page));
+  if (params.page_size) query.set('page_size', String(params.page_size));
+  if (params.status) query.set('status', params.status);
+  if (params.date_from) query.set('date_from', params.date_from);
+  if (params.date_to) query.set('date_to', params.date_to);
+  return apiFetch<PaginatedResponse<SaleResponse>>(`/sales/?${query.toString()}`);
+}
+
+export async function getSale(id: string): Promise<SaleResponse> {
+  return apiFetch<SaleResponse>(`/sales/${id}`);
+}
+
+export async function createSale(data: SaleCreateData): Promise<SaleResponse> {
+  return apiFetch<SaleResponse>('/sales/', {
+    method: 'POST',
+    body: JSON.stringify(data),
+  });
+}
+
+export async function updateSale(id: string, data: SaleUpdateData): Promise<SaleResponse> {
+  return apiFetch<SaleResponse>(`/sales/${id}`, {
+    method: 'PUT',
+    body: JSON.stringify(data),
+  });
+}
+
+export async function deleteSale(id: string): Promise<SaleResponse> {
+  return apiFetch<SaleResponse>(`/sales/${id}`, { method: 'DELETE' });
+}
+
+export async function regenerateContract(id: string): Promise<ContractResponse> {
+  return apiFetch<ContractResponse>(`/sales/${id}/contract`, { method: 'POST' });
+}
+
+export async function verifyUstId(id: string): Promise<UstIdVerifyResponse> {
+  return apiFetch<UstIdVerifyResponse>(`/sales/${id}/verify-ust-id`, { method: 'POST' });
+}
+
+export function getContractDownloadUrl(id: string): string {
+  const baseUrl = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000/api/v1';
+  return `${baseUrl}/sales/${id}/contract`;
+}