feat(lexware): add integration foundation

frontend/athena/types/lexware.ts

@@ -0,0 +1,56 @@
+import type { SettingsSource } from "@/types/system-settings";
+
+export interface LexwareSettings {
+  enabled: boolean;
+  api_base_url: string;
+  api_key_is_set: boolean;
+  organization_name: string;
+  default_tax_rate: string;
+  default_payment_terms_days: number;
+  source: SettingsSource;
+}
+
+export interface LexwareSettingsPayload {
+  enabled: boolean;
+  api_base_url: string;
+  api_key?: string;
+  organization_name: string;
+  default_tax_rate: string;
+  default_payment_terms_days: number;
+}
+
+export interface LexwareTestConnectionResponse {
+  success: boolean;
+  message: string;
+  source: SettingsSource;
+  api_base_url: string;
+  organization_name: string;
+}
+
+export interface LexwareCustomerMapping {
+  name: string;
+  email: string;
+  phone: string;
+  search_strategy: string;
+  create_payload: Record<string, unknown>;
+}
+
+export interface LexwareLineItemMapping {
+  title: string;
+  description: string | null;
+  quantity: string;
+  unit: string;
+  unit_price: string;
+  tax_rate: string;
+  total: string;
+}
+
+export interface LexwareInvoicePreparation {
+  ready_for_export: boolean;
+  payload_summary: Record<string, unknown>;
+  customer_mapping: LexwareCustomerMapping;
+  line_item_mapping: LexwareLineItemMapping[];
+  tax_mapping: Record<string, unknown>;
+  warnings: string[];
+  sync_record_id: number;
+}

frontend/athena/types/repair.ts

@@ -216,6 +216,10 @@ export interface RepairEstimate {
   approved_at: string | null;
   declined_at: string | null;
   customer_response_message: string | null;
+  lexware_invoice_id: string | null;
+  lexware_invoice_number: string | null;
+  lexware_invoice_status: string | null;
+  lexware_synced_at: string | null;
   created_by_user_id: number | null;
   created_at: string;
   updated_at: string;