Preserve QExcell print areas in XLSX

src/io/excellOffice.test.ts

@@ -17,6 +17,7 @@ import {
   chartDataPoints,
   chartXmlToSheetChart,
   workbookActiveSheetId,
+  workbookPrintAreas,
   workbookRelationshipTargets,
   workbookSheetRefs,
   worksheetXmlToAutoFilter,
@@ -576,6 +577,46 @@ describe("excellOffice OOXML helpers", () => {
     expect(imported.activeSheet).toBe("sheet-2");
   });
 
+  it("сохраняет и импортирует область печати XLSX через definedName _xlnm.Print_Area", async () => {
+    expect(
+      workbookPrintAreas(
+        {
+          workbook: {
+            definedNames: {
+              definedName: [
+                { name: "_xlnm.Print_Area", localSheetId: "0", "#text": "'Отчет'!$D$20:$A$1" },
+                { name: "_xlnm.Print_Area", localSheetId: "1", "#text": "'Архив'!$B$2:$C$4,'Архив'!$E$1:$E$3" }
+              ]
+            }
+          }
+        },
+        [
+          { id: "sheet-1", name: "Отчет" },
+          { id: "sheet-2", name: "Архив" }
+        ]
+      )
+    ).toEqual({ "sheet-1": "A1:D20", "sheet-2": "B2:C4,E1:E3" });
+
+    const blob = await exportXlsxBlob({
+      id: "book-1",
+      title: "Область печати.xlsx",
+      updatedAt: "2026-06-01T00:00:00.000Z",
+      activeSheet: "sheet-1",
+      sheets: [
+        { id: "sheet-1", name: "Отчет", printArea: "D20:A1", cells: { A1: "Начало", D20: "Итог" } },
+        { id: "sheet-2", name: "Архив", printArea: "B2:C4,E1:E3", cells: { B2: "Архив" } }
+      ]
+    });
+    const zip = await JSZip.loadAsync(await blob.arrayBuffer());
+    const workbookXml = await zip.file("xl/workbook.xml")?.async("string");
+    const imported = await importXlsxFile(new File([blob], "Область печати.xlsx", { type: blob.type }));
+
+    expect(workbookXml).toContain('<definedNames><definedName name="_xlnm.Print_Area" localSheetId="0">\'Отчет\'!$A$1:$D$20</definedName>');
+    expect(workbookXml).toContain('<definedName name="_xlnm.Print_Area" localSheetId="1">\'Архив\'!$B$2:$C$4,\'Архив\'!$E$1:$E$3</definedName></definedNames>');
+    expect(imported.sheets[0].printArea).toBe("A1:D20");
+    expect(imported.sheets[1].printArea).toBe("B2:C4,E1:E3");
+  });
+
   it("сохраняет и импортирует скрытые листы XLSX через sheet state", async () => {
     const blob = await exportXlsxBlob({
       id: "book-1",