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/apps/cli/src/hooks/useProductionOrders.ts

@@ -0,0 +1,43 @@
+import { useState, useCallback } from 'react';
+import type { ProductionOrderDTO, CreateProductionOrderRequest } from '@effigenix/api-client';
+import { client } from '../utils/api-client.js';
+
+interface ProductionOrdersState {
+  productionOrder: ProductionOrderDTO | null;
+  loading: boolean;
+  error: string | null;
+}
+
+function errorMessage(err: unknown): string {
+  return err instanceof Error ? err.message : 'Unbekannter Fehler';
+}
+
+export function useProductionOrders() {
+  const [state, setState] = useState<ProductionOrdersState>({
+    productionOrder: null,
+    loading: false,
+    error: null,
+  });
+
+  const createProductionOrder = useCallback(async (request: CreateProductionOrderRequest) => {
+    setState((s) => ({ ...s, loading: true, error: null }));
+    try {
+      const productionOrder = await client.productionOrders.create(request);
+      setState({ productionOrder, loading: false, error: null });
+      return productionOrder;
+    } catch (err) {
+      setState((s) => ({ ...s, loading: false, error: errorMessage(err) }));
+      return null;
+    }
+  }, []);
+
+  const clearError = useCallback(() => {
+    setState((s) => ({ ...s, error: null }));
+  }, []);
+
+  return {
+    ...state,
+    createProductionOrder,
+    clearError,
+  };
+}