feat(tui): Create-Screen für Produktionsaufträge

Types, API-Client Resource, Hook und TUI-Screen für den neuen
POST /api/production/production-orders Endpoint. Menüeintrag
im Produktionsmenü ergänzt.

frontend/packages/api-client/src/resources/production-orders.ts

@@ -0,0 +1,28 @@
+/** Production Orders resource – Production BC. */
+
+import type { AxiosInstance } from 'axios';
+import type { ProductionOrderDTO, CreateProductionOrderRequest } from '@effigenix/types';
+
+export type Priority = 'LOW' | 'NORMAL' | 'HIGH' | 'URGENT';
+
+export const PRIORITY_LABELS: Record<Priority, string> = {
+  LOW: 'Niedrig',
+  NORMAL: 'Normal',
+  HIGH: 'Hoch',
+  URGENT: 'Dringend',
+};
+
+export type { ProductionOrderDTO, CreateProductionOrderRequest };
+
+const BASE = '/api/production/production-orders';
+
+export function createProductionOrdersResource(client: AxiosInstance) {
+  return {
+    async create(request: CreateProductionOrderRequest): Promise<ProductionOrderDTO> {
+      const res = await client.post<ProductionOrderDTO>(BASE, request);
+      return res.data;
+    },
+  };
+}
+
+export type ProductionOrdersResource = ReturnType<typeof createProductionOrdersResource>;