feat(nas): archive issued-order PDFs to NAS_ORDERS; split NAS_FINANCIALS_PATH into NAS_INVOICES + NAS_ORDERS

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/routes/admin/issued-orders-pdf.ts

@@ -1,9 +1,10 @@
 import { FastifyInstance } from "fastify";
 import prisma from "../../config/database";
 import { requirePermission } from "../../middleware/auth";
-import { parseId } from "../../utils/response";
+import { parseId, success } from "../../utils/response";
 import { localDateCzStr } from "../../utils/date";
 import { htmlToPdf } from "../../utils/html-to-pdf";
+import { nasOrdersManager } from "../../services/nas-financials-manager";
 import createDOMPurify from "dompurify";
 import { JSDOM } from "jsdom";
 
@@ -856,6 +857,25 @@ export default async function issuedOrdersPdfRoutes(fastify: FastifyInstance) {
           settings,
           lang,
         );
+
+        // ?save=1 → archive the PDF to NAS instead of returning it (mirrors
+        // invoices-pdf). A draft has no po_number → the guard skips it.
+        const saveMode = query.save === "1";
+        if (saveMode && nasOrdersManager.isConfigured() && order.po_number) {
+          const baseDate = order.order_date
+            ? new Date(order.order_date)
+            : new Date();
+          nasOrdersManager.cleanIssued(order.po_number);
+          const pdfBuffer = await htmlToPdf(html);
+          nasOrdersManager.saveIssuedPdf(
+            order.po_number,
+            baseDate.getFullYear(),
+            baseDate.getMonth() + 1,
+            pdfBuffer,
+          );
+          return success(reply, null, 200, "PDF uloženo");
+        }
+
         const pdf = await htmlToPdf(html);
         const filename = `Objednavka-${order.po_number || String(id)}.pdf`;
         return reply