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/__tests__/nas-document-manager.test.ts

@@ -0,0 +1,56 @@
+import { describe, it, expect, beforeEach, afterEach } from "vitest";
+import fs from "fs";
+import os from "os";
+import path from "path";
+import { NasDocumentManager } from "../services/nas-financials-manager";
+
+/**
+ * Generic NAS archival manager backing both the invoices NAS (NAS_INVOICES) and
+ * the orders NAS (NAS_ORDERS). Uses an isolated temp dir via the constructor
+ * seam so it is deterministic and passes even where the real NAS (Z:) is not
+ * mounted. Layout: {base}/Vydané/YYYY/MM/<n>.pdf — diacritics preserved.
+ */
+describe("NasDocumentManager issued-PDF round-trip", () => {
+  let tmpBase: string;
+  let nas: NasDocumentManager;
+
+  beforeEach(() => {
+    tmpBase = fs.mkdtempSync(path.join(os.tmpdir(), "nas-doc-"));
+    nas = new NasDocumentManager(tmpBase);
+  });
+
+  afterEach(() => {
+    fs.rmSync(tmpBase, { recursive: true, force: true });
+  });
+
+  it("saves an issued PDF under Vydané/YYYY/MM/<number>.pdf and reads it back", () => {
+    const buf = Buffer.from("%PDF-1.4 fake order pdf bytes", "utf8");
+    const rel = nas.saveIssuedPdf("25P0001", 2026, 6, buf);
+
+    expect(rel).toBe("Vydané/2026/06/25P0001.pdf");
+    const onDisk = path.join(tmpBase, "Vydané", "2026", "06", "25P0001.pdf");
+    expect(fs.existsSync(onDisk)).toBe(true);
+
+    const read = nas.readIssued(rel!);
+    expect(read).not.toBeNull();
+    expect(read!.fileName).toBe("25P0001.pdf");
+    expect(read!.data.equals(buf)).toBe(true);
+  });
+
+  it("cleanIssued removes a previously-saved PDF across year/month folders", () => {
+    const buf = Buffer.from("pdf", "utf8");
+    const rel = nas.saveIssuedPdf("25P0002", 2026, 6, buf);
+    expect(nas.readIssued(rel!)).not.toBeNull();
+
+    nas.cleanIssued("25P0002");
+    expect(nas.readIssued(rel!)).toBeNull();
+  });
+
+  it("an unconfigured (empty basePath) manager is not configured and saves nothing", () => {
+    const blank = new NasDocumentManager("");
+    expect(blank.isConfigured()).toBe(false);
+    expect(
+      blank.saveIssuedPdf("25P0003", 2026, 6, Buffer.from("x")),
+    ).toBeNull();
+  });
+});