feat(c4): lançamento de pedido — catálogo, alçada por linha, POST /orders

- Prisma: Product + RepDiscountLimit + productCategory em OrderItem + migration
- Seed: 28 produtos (5 categorias) + alçadas user-001 (default 10%, bebidas 8%, perecíveis 5%)
- @sar/api-interface: ProductSummarySchema, ProductDetailSchema, ProductSyncRequestSchema, CreateOrderSchema
- API: CatalogModule (GET /catalog, GET /catalog/:id, POST /catalog/sync)
- API: POST /orders — valida alçada por linha/produto (OQ-2), idempotency-key (FR-4.3), desnorm cliente
- Web: NewOrderPage (3 steps: catálogo → desconto/obs → confirmação)
- Web: botão Novo Pedido na ClientDetailPage (desabilitado se financialStatus=blocked)
- Web: rota /pedidos/novo com search param clientId

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/lib/queries/catalog.ts

@@ -0,0 +1,26 @@
+import { useQuery } from '@tanstack/react-query';
+import {
+  ProductListResponseSchema,
+  type ProductListQuery,
+  type ProductListResponse,
+} from '@sar/api-interface';
+import { apiFetch } from '../api-client';
+
+export function useCatalog(params: Partial<ProductListQuery> = {}) {
+  const search = new URLSearchParams();
+  if (params.q) search.set('q', params.q);
+  if (params.category) search.set('category', params.category);
+  if (params.page) search.set('page', String(params.page));
+  if (params.limit) search.set('limit', String(params.limit));
+
+  const qs = search.toString();
+  return useQuery<ProductListResponse>({
+    queryKey: ['catalog', params],
+    queryFn: async () => {
+      const res = await apiFetch(`/catalog${qs ? `?${qs}` : ''}`);
+      if (!res.ok) throw new Error(`catalog error ${res.status}`);
+      return ProductListResponseSchema.parse(await res.json());
+    },
+    staleTime: 4 * 60 * 60 * 1000, // TTL 4h — FR-4.4
+  });
+}