Add Ollama Gemma QWord task prompt

src/App.test.tsx

@@ -0,0 +1,108 @@
+import { cleanup, fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { afterEach, describe, expect, it } from "vitest";
+import { initialState } from "./data/sampleData";
+import type { QOfficeState } from "./types";
+import { App, qofficeWindowTitle } from "./App";
+
+afterEach(() => {
+  cleanup();
+  window.localStorage.clear();
+  window.history.pushState({}, "", "/");
+  window.document.title = "";
+});
+
+describe("qofficeWindowTitle", () => {
+  it("uses the current artifact name for standalone application title bars", () => {
+    expect(qofficeWindowTitle(initialState, "word")).toBe(`${initialState.word.title} - QWord`);
+    expect(qofficeWindowTitle(initialState, "sheets")).toBe(`${initialState.workbook.title} - QExcell`);
+    expect(qofficeWindowTitle(initialState, "slides")).toBe(`${initialState.deck.title} - QPowerPoint`);
+
+    const activeMessage = initialState.mail.messages.find((message) => message.id === initialState.mail.activeMessageId);
+    expect(qofficeWindowTitle(initialState, "mail")).toBe(`${activeMessage?.subject} - QOutlook`);
+  });
+
+  it("falls back to default standalone titles when names are blank", () => {
+    const state: QOfficeState = {
+      ...initialState,
+      word: { ...initialState.word, title: "   " },
+      workbook: { ...initialState.workbook, title: "" },
+      deck: { ...initialState.deck, title: "\n\t" },
+      mail: {
+        ...initialState.mail,
+        messages: initialState.mail.messages.map((message) =>
+          message.id === initialState.mail.activeMessageId ? { ...message, subject: "" } : message
+        )
+      }
+    };
+
+    expect(qofficeWindowTitle(state, "word")).toBe("Документ1 - QWord");
+    expect(qofficeWindowTitle(state, "sheets")).toBe("Книга1 - QExcell");
+    expect(qofficeWindowTitle(state, "slides")).toBe("Презентация1 - QPowerPoint");
+    expect(qofficeWindowTitle(state, "mail")).toBe("Почта - QOutlook");
+  });
+
+  it("syncs the browser document title with the active standalone application", async () => {
+    const originalResizeObserver = globalThis.ResizeObserver;
+    const originalRequestAnimationFrame = window.requestAnimationFrame;
+
+    globalThis.ResizeObserver = class {
+      observe() {}
+      disconnect() {}
+    } as unknown as typeof ResizeObserver;
+    window.requestAnimationFrame = ((callback: FrameRequestCallback) => {
+      callback(0);
+      return 1;
+    }) as typeof window.requestAnimationFrame;
+    window.history.pushState({}, "", "/qword");
+
+    try {
+      render(<App />);
+
+      await waitFor(() => expect(window.document.title).toBe(qofficeWindowTitle(initialState, "word")));
+    } finally {
+      globalThis.ResizeObserver = originalResizeObserver;
+      window.requestAnimationFrame = originalRequestAnimationFrame;
+    }
+  });
+
+  it("syncs QWord statusbar view buttons with the active document view mode", () => {
+    const originalResizeObserver = globalThis.ResizeObserver;
+    const originalRequestAnimationFrame = window.requestAnimationFrame;
+
+    globalThis.ResizeObserver = class {
+      observe() {}
+      disconnect() {}
+    } as unknown as typeof ResizeObserver;
+    window.requestAnimationFrame = ((callback: FrameRequestCallback) => {
+      callback(0);
+      return 1;
+    }) as typeof window.requestAnimationFrame;
+    window.history.pushState({}, "", "/qword");
+
+    try {
+      render(<App />);
+      const stage = screen.getByLabelText("Редактор QWord");
+      const printButton = screen.getByRole("button", { name: "Разметка страницы" });
+      const webButton = screen.getByRole("button", { name: "Веб-документ" });
+
+      expect(stage).toHaveClass("qword-view-print");
+      expect(printButton).toHaveAttribute("aria-pressed", "true");
+      expect(screen.queryByRole("button", { name: "Черновик" })).not.toBeInTheDocument();
+
+      fireEvent.click(webButton);
+
+      expect(stage).toHaveClass("qword-view-web");
+      expect(webButton).toHaveAttribute("aria-pressed", "true");
+      expect(printButton).toHaveAttribute("aria-pressed", "false");
+
+      fireEvent.click(screen.getByRole("tab", { name: "Вид" }));
+      fireEvent.click(screen.getByRole("button", { name: "Чтение" }));
+
+      expect(stage).toHaveClass("qword-view-read");
+      expect(screen.getByRole("button", { name: "Режим чтения" })).toHaveAttribute("aria-pressed", "true");
+    } finally {
+      globalThis.ResizeObserver = originalResizeObserver;
+      window.requestAnimationFrame = originalRequestAnimationFrame;
+    }
+  });
+});

src/App.tsx

@@ -1,9 +1,9 @@
-import { useCallback, useMemo, useState } from "react";
+import { useCallback, useEffect, useMemo, useState } from "react";
-import { BookOpen, Columns2, FileText, Minus, Plus, Rows3 } from "lucide-react";
+import { BookOpen, Columns2, FileText, Minus, Plus } from "lucide-react";
 import { AppShell } from "./components/AppShell";
 import { QOutlook } from "./features/qoutlook/QOutlook";
 import { QPowerPoint } from "./features/qpowerpoint/QPowerPoint";
-import { QWord, type QWordStatus } from "./features/qword/QWord";
+import { QWord, type QWordStatus, type WordViewMode } from "./features/qword/QWord";
 import { QExcell } from "./features/qexcell/QExcell";
 import { initialState } from "./data/sampleData";
 import { usePersistentState } from "./hooks/usePersistentState";
@@ -12,11 +12,38 @@ import type { MailMessage, QOfficeState, SlideDeck, WordDocument, Workbook } fro
 
 const STORAGE_KEY = "qoffice-state-v1";
 const defaultQWordStatus: QWordStatus = { currentPage: 1, pageCount: 1, wordCount: 0 };
+const wordStatusbarViewModes = [
+  { id: "print", label: "Разметка страницы", Icon: FileText },
+  { id: "read", label: "Режим чтения", Icon: BookOpen },
+  { id: "web", label: "Веб-документ", Icon: Columns2 }
+] as const;
 
 function clampedWordZoom(value: number) {
   return Math.min(200, Math.max(50, value));
 }
 
+function normalizedWindowTitlePart(value: string | undefined, fallback: string) {
+  const normalized = value?.replace(/\s+/g, " ").trim();
+  return normalized || fallback;
+}
+
+export function qofficeWindowTitle(state: QOfficeState, activeApp: QOfficeState["activeApp"]) {
+  if (activeApp === "word") {
+    return `${normalizedWindowTitlePart(state.word.title, "Документ1")} - QWord`;
+  }
+
+  if (activeApp === "sheets") {
+    return `${normalizedWindowTitlePart(state.workbook.title, "Книга1")} - QExcell`;
+  }
+
+  if (activeApp === "slides") {
+    return `${normalizedWindowTitlePart(state.deck.title, "Презентация1")} - QPowerPoint`;
+  }
+
+  const activeMessage = state.mail.messages.find((message) => message.id === state.mail.activeMessageId);
+  return `${normalizedWindowTitlePart(activeMessage?.subject, "Почта")} - QOutlook`;
+}
+
 function migrateQOfficeState(state: QOfficeState): QOfficeState {
   const launchChecklistAttachments = initialState.mail.messages.find((message) => message.id === "mail-1")?.attachments;
   const sampleSheet = initialState.workbook.sheets.find((sheet) => sheet.id === "sheet-1");
@@ -26,11 +53,15 @@ function migrateQOfficeState(state: QOfficeState): QOfficeState {
     state.word.id === initialState.word.id &&
     sampleWordHtml.includes("Ключевой результат") &&
     !state.word.html.includes("Ключевой результат");
+  const needsDeckSlideSize = !state.deck.slideSize;
 
   let changed = false;
   if (needsSampleWordColor) {
     changed = true;
   }
+  if (needsDeckSlideSize) {
+    changed = true;
+  }
   const messages = state.mail.messages.map((message) => {
     if (!launchChecklistAttachments || message.id !== "mail-1" || (message.attachments?.length ?? 0) > 0) {
       return message;
@@ -90,7 +121,7 @@ function migrateQOfficeState(state: QOfficeState): QOfficeState {
         ...state,
         word: needsSampleWordColor ? { ...state.word, html: sampleWordHtml } : state.word,
         workbook: { ...state.workbook, sheets },
-        deck: { ...state.deck, slides },
+        deck: { ...state.deck, slideSize: state.deck.slideSize ?? initialState.deck.slideSize ?? "wide", slides },
         mail: { ...state.mail, messages }
       }
     : state;
@@ -100,7 +131,13 @@ export function App() {
   const [state, setState] = usePersistentState<QOfficeState>(STORAGE_KEY, initialState, migrateQOfficeState);
   const [wordStatus, setWordStatus] = useState<QWordStatus>(defaultQWordStatus);
   const [wordZoom, setWordZoom] = useState(100);
+  const [wordViewMode, setWordViewMode] = useState<WordViewMode>("print");
   const activeApp = activeAppFromLocation(window.location);
+  const windowTitle = qofficeWindowTitle(state, activeApp);
+
+  useEffect(() => {
+    window.document.title = windowTitle;
+  }, [windowTitle]);
 
   const updateWordStatus = useCallback((nextStatus: QWordStatus) => {
     setWordStatus((current) =>
@@ -137,18 +174,23 @@ export function App() {
         trailing: (
           <div className="word-statusbar-tools" aria-label="Режимы просмотра и масштаб QWord">
             <div className="word-view-buttons" aria-label="Режимы просмотра">
-              <button className="is-active" type="button" title="Разметка страницы" aria-label="Разметка страницы" aria-pressed="true">
+              {wordStatusbarViewModes.map((mode) => {
-                <FileText size={15} />
+                const Icon = mode.Icon;
-              </button>
+                const isActive = wordViewMode === mode.id;
-              <button type="button" title="Режим чтения" aria-label="Режим чтения">
+                return (
-                <BookOpen size={15} />
+                  <button
-              </button>
+                    key={mode.id}
-              <button type="button" title="Веб-документ" aria-label="Веб-документ">
+                    className={isActive ? "is-active" : undefined}
-                <Columns2 size={15} />
+                    type="button"
-              </button>
+                    title={mode.label}
-              <button type="button" title="Черновик" aria-label="Черновик">
+                    aria-label={mode.label}
-                <Rows3 size={15} />
+                    aria-pressed={isActive}
+                    onClick={() => setWordViewMode(mode.id)}
+                  >
+                    <Icon size={15} />
                   </button>
+                );
+              })}
             </div>
             <button type="button" title="Уменьшить масштаб" aria-label="Уменьшить масштаб" onClick={() => adjustWordZoom(-10)}>
               <Minus size={14} />
@@ -185,6 +227,7 @@ export function App() {
     wordStatus.currentPage,
     wordStatus.pageCount,
     wordStatus.wordCount,
+    wordViewMode,
     wordZoom
   ]);
 
@@ -217,7 +260,14 @@ export function App() {
 
   const activeSurface =
     activeApp === "word" ? (
-      <QWord document={state.word} zoom={wordZoom} onChange={updateWord} onStatusChange={updateWordStatus} />
+      <QWord
+        document={state.word}
+        zoom={wordZoom}
+        viewMode={wordViewMode}
+        onChange={updateWord}
+        onStatusChange={updateWordStatus}
+        onViewModeChange={setWordViewMode}
+      />
     ) : activeApp === "sheets" ? (
       <QExcell workbook={state.workbook} onChange={updateWorkbook} />
     ) : activeApp === "slides" ? (
@@ -227,7 +277,7 @@ export function App() {
     );
 
   return (
-    <AppShell activeApp={activeApp} status={status}>
+    <AppShell activeApp={activeApp} windowTitle={windowTitle} status={status}>
       {activeSurface}
     </AppShell>
   );

src/components/AppShell.test.tsx

@@ -1,8 +1,12 @@
-import { render, screen } from "@testing-library/react";
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
-import { describe, expect, it } from "vitest";
+import { afterEach, describe, expect, it } from "vitest";
 import { AppShell } from "./AppShell";
 
 describe("AppShell", () => {
+  afterEach(() => {
+    cleanup();
+  });
+
   it("не показывает общую ленту навигации между приложениями", () => {
     const view = render(
       <AppShell activeApp="word" status={{ savedLabel: "Сохранено локально" }}>
@@ -37,4 +41,39 @@ describe("AppShell", () => {
     expect(screen.getByText("Число слов: 42")).toBeInTheDocument();
     expect(screen.getByText("125%")).toBeInTheDocument();
   });
+
+  it("показывает заголовок текущего файла активного приложения", () => {
+    render(
+      <AppShell activeApp="word" windowTitle="Отчет.docx - QWord" status={{ savedLabel: "Сохранено локально" }}>
+        <div>Рабочая область QWord</div>
+      </AppShell>
+    );
+
+    expect(screen.getByText("Отчет.docx - QWord")).toBeInTheDocument();
+  });
+
+  it("отправляет команды панели быстрого доступа активному приложению", () => {
+    const commands: string[] = [];
+    function onCommand(event: WindowEventMap["qoffice-command"]) {
+      commands.push(event.detail.command);
+    }
+    window.addEventListener("qoffice-command", onCommand);
+
+    try {
+      const view = render(
+        <AppShell activeApp="word" status={{ savedLabel: "Сохранено локально" }}>
+          <div>Рабочая область QWord</div>
+        </AppShell>
+      );
+      const quickAccessButtons = view.container.querySelectorAll(".quick-access button");
+
+      fireEvent.click(quickAccessButtons[0]);
+      fireEvent.click(quickAccessButtons[1]);
+      fireEvent.click(quickAccessButtons[2]);
+
+      expect(commands).toEqual(["save", "undo", "redo"]);
+    } finally {
+      window.removeEventListener("qoffice-command", onCommand);
+    }
+  });
 });

src/components/AppShell.tsx

@@ -6,11 +6,13 @@ import {
   Share2,
   Undo2
 } from "lucide-react";
-import type { ReactNode } from "react";
+import type { MouseEvent, ReactNode } from "react";
+import type { QOfficeCommand } from "../hooks/useQOfficeCommand";
 import type { AppId } from "../types";
 
 interface AppShellProps {
   activeApp: AppId;
+  windowTitle?: string;
   status: {
     savedLabel: string;
     updatedAt?: string;
@@ -28,28 +30,37 @@ const appTitles: Record<AppId, string> = {
   mail: "Почта - QOutlook"
 };
 
-export function AppShell({ activeApp, status, children }: AppShellProps) {
+function dispatchQOfficeCommand(command: QOfficeCommand) {
+  window.dispatchEvent(new CustomEvent("qoffice-command", { detail: { command } }));
+}
+
+function keepActiveEditorFocus(event: MouseEvent<HTMLButtonElement>) {
+  event.preventDefault();
+}
+
+export function AppShell({ activeApp, windowTitle, status, children }: AppShellProps) {
   const statusClassName = ["statusbar", status.className].filter(Boolean).join(" ");
+  const displayWindowTitle = windowTitle?.trim() || appTitles[activeApp];
 
   return (
     <div className="qoffice-shell">
       <main className="workspace">
         <header className="titlebar">
           <div className="quick-access" aria-label="Панель быстрого доступа">
-            <button type="button" title="Сохранить" aria-label="Сохранить">
+            <button type="button" title="Сохранить" aria-label="Сохранить" onMouseDown={keepActiveEditorFocus} onClick={() => dispatchQOfficeCommand("save")}>
               <Save size={16} />
             </button>
-            <button type="button" title="Отменить" aria-label="Отменить">
+            <button type="button" title="Отменить" aria-label="Отменить" onMouseDown={keepActiveEditorFocus} onClick={() => dispatchQOfficeCommand("undo")}>
               <Undo2 size={16} />
             </button>
-            <button type="button" title="Повторить" aria-label="Повторить">
+            <button type="button" title="Повторить" aria-label="Повторить" onMouseDown={keepActiveEditorFocus} onClick={() => dispatchQOfficeCommand("redo")}>
               <Redo2 size={16} />
             </button>
             <button type="button" title="Настроить панель" aria-label="Настроить панель">
               <ChevronDown size={14} />
             </button>
           </div>
-          <strong className="window-title">{appTitles[activeApp]}</strong>
+          <strong className="window-title">{displayWindowTitle}</strong>
           <div className="titlebar-actions">
             <label className="command-search">
               <Search size={16} />

src/data/sampleData.ts

@@ -31,7 +31,8 @@ export const initialState: QOfficeState = {
           <tr><td>Поставка</td><td>Разработка и контроль качества</td><td>Карина М.</td></tr>
         </tbody>
       </table>
-    `
+    `,
+    pageSetup: { size: "a4", orientation: "portrait", marginPreset: "normal" }
   },
   workbook: {
     id: "qexcell-quarter-plan",
@@ -108,6 +109,7 @@ export const initialState: QOfficeState = {
     title: "Дорожная карта.qpptx",
     updatedAt: new Date().toISOString(),
     activeSlideId: "slide-1",
+    slideSize: "wide",
     slides: [
       {
         id: "slide-1",

src/features/qexcell/QExcell.tsx

@@ -32,7 +32,7 @@ import {
   Underline,
   WrapText
 } from "lucide-react";
-import type { CellFormat, SheetChart, SheetChartType, Workbook } from "../../types";
+import type { CellFormat, SheetChart, SheetChartType, SheetPageMarginPreset, SheetPageOrientation, SheetPageSetup, SheetPageSizeId, Workbook } from "../../types";
 import { cellId, columnLabel, columnLabelsForCount, evaluateCell, formatCellValueForDisplay, mergedCellInfo, parseCellId, summarizeColumn, usedSheetBounds } from "../../utils/spreadsheet";
 import { downloadBlobFile, downloadTextFile } from "../../utils/download";
 import { chartDataPoints, exportXlsxBlob, importXlsxFile } from "../../io/excellOffice";
@@ -95,6 +95,20 @@ const chartTypeOptions: Array<{ value: SheetChartType; label: string }> = [
   { value: "line", label: "Линейная" },
   { value: "pie", label: "Круговая" }
 ];
+const sheetPageSizeOptions: Array<{ id: SheetPageSizeId; label: string }> = [
+  { id: "a4", label: "A4" },
+  { id: "letter", label: "Letter" }
+];
+const sheetPageOrientationOptions: Array<{ id: SheetPageOrientation; label: string }> = [
+  { id: "portrait", label: "Книжная" },
+  { id: "landscape", label: "Альбомная" }
+];
+const sheetPageMarginOptions: Array<{ id: SheetPageMarginPreset; label: string }> = [
+  { id: "normal", label: "Обычные" },
+  { id: "narrow", label: "Узкие" },
+  { id: "wide", label: "Широкие" }
+];
+const defaultSheetPageSetup: SheetPageSetup = { size: "a4", orientation: "portrait", marginPreset: "normal" };
 
 const horizontalAlignOptions = [
   { value: "left", label: "По левому краю", icon: AlignLeft },
@@ -159,6 +173,18 @@ function normalizedCellFormat(format: CellFormat): CellFormat | undefined {
   return Object.keys(normalized).length > 0 ? normalized : undefined;
 }
 
+function normalizedSheetPageSetup(setup?: SheetPageSetup): SheetPageSetup {
+  const candidateSize = setup?.size;
+  const candidateOrientation = setup?.orientation;
+  const candidateMarginPreset = setup?.marginPreset;
+  const size = candidateSize && sheetPageSizeOptions.some((option) => option.id === candidateSize) ? candidateSize : defaultSheetPageSetup.size;
+  const orientation =
+    candidateOrientation && sheetPageOrientationOptions.some((option) => option.id === candidateOrientation) ? candidateOrientation : defaultSheetPageSetup.orientation;
+  const marginPreset =
+    candidateMarginPreset && sheetPageMarginOptions.some((option) => option.id === candidateMarginPreset) ? candidateMarginPreset : defaultSheetPageSetup.marginPreset;
+  return { size, orientation, marginPreset };
+}
+
 function cellInputStyle(format?: CellFormat): CSSProperties {
   const textDecoration = [format?.underline ? "underline" : "", format?.strike ? "line-through" : ""].filter(Boolean).join(" ");
   return {
@@ -276,6 +302,7 @@ export function QExcell({ workbook, onChange }: QExcellProps) {
   const activeHiddenColumns = activeSheet.hiddenColumns ?? emptyHiddenItems;
   const activeHiddenRows = activeSheet.hiddenRows ?? emptyHiddenItems;
   const activeCharts = activeSheet.charts ?? emptyCharts;
+  const activeSheetPageSetup = normalizedSheetPageSetup(activeSheet.pageSetup);
   const selectedRawValue = activeSheet.cells[selectedCell] ?? "";
   const selectedHyperlink = activeHyperlinks[selectedCell] ?? "";
   const selectedComment = activeComments[selectedCell] ?? "";
@@ -418,6 +445,15 @@ export function QExcell({ workbook, onChange }: QExcellProps) {
     });
   }
 
+  function updateActiveSheetPageSetup(pageSetupPatch: Partial<SheetPageSetup>) {
+    onChange({
+      ...workbook,
+      sheets: workbook.sheets.map((sheet) =>
+        sheet.id === activeSheet.id ? { ...sheet, pageSetup: normalizedSheetPageSetup({ ...activeSheetPageSetup, ...pageSetupPatch }) } : sheet
+      )
+    });
+  }
+
   function addSheet() {
     const id = `sheet-${workbook.sheets.length + 1}`;
     onChange({
@@ -854,6 +890,39 @@ export function QExcell({ workbook, onChange }: QExcellProps) {
                 onBlur={(event) => updateActiveSheetPrintArea(normalizedPrintAreaInput(event.target.value))}
               />
             </label>
+            <label className="office-field">
+              <span>Размер</span>
+              <select value={activeSheetPageSetup.size} onChange={(event) => updateActiveSheetPageSetup({ size: event.target.value as SheetPageSizeId })}>
+                {sheetPageSizeOptions.map((option) => (
+                  <option key={option.id} value={option.id}>
+                    {option.label}
+                  </option>
+                ))}
+              </select>
+            </label>
+            <label className="office-field">
+              <span>Ориентация</span>
+              <select
+                value={activeSheetPageSetup.orientation}
+                onChange={(event) => updateActiveSheetPageSetup({ orientation: event.target.value as SheetPageOrientation })}
+              >
+                {sheetPageOrientationOptions.map((option) => (
+                  <option key={option.id} value={option.id}>
+                    {option.label}
+                  </option>
+                ))}
+              </select>
+            </label>
+            <label className="office-field">
+              <span>Поля</span>
+              <select value={activeSheetPageSetup.marginPreset} onChange={(event) => updateActiveSheetPageSetup({ marginPreset: event.target.value as SheetPageMarginPreset })}>
+                {sheetPageMarginOptions.map((option) => (
+                  <option key={option.id} value={option.id}>
+                    {option.label}
+                  </option>
+                ))}
+              </select>
+            </label>
           </div>
 
           <div className="office-tool-section">

src/features/qpowerpoint/QPowerPoint.test.tsx

@@ -55,6 +55,21 @@ describe("QPowerPoint", () => {
     expect(nextDeck.slides[0].images?.[0].hyperlink).toBe("https://example.com/updated-logo");
   });
 
+  it("переключает размер слайда презентации", () => {
+    const onChange = vi.fn();
+    const view = render(<QPowerPoint deck={deckWithLinkedImage()} onChange={onChange} />);
+    const slideSizeSelect = view.container.querySelector('select[aria-label="Размер слайда"]') as HTMLSelectElement;
+    const canvas = view.container.querySelector(".slide-canvas") as HTMLElement;
+
+    expect(slideSizeSelect).toHaveValue("wide");
+    expect(canvas.style.aspectRatio).toBe("13.333 / 7.5");
+
+    fireEvent.change(slideSizeSelect, { target: { value: "standard" } });
+
+    const nextDeck = onChange.mock.calls[onChange.mock.calls.length - 1]?.[0] as SlideDeck;
+    expect(nextDeck.slideSize).toBe("standard");
+  });
+
   it("переключает начертание текста слайда", () => {
     const onChange = vi.fn();
     const view = render(<QPowerPoint deck={deckWithLinkedImage()} onChange={onChange} />);

src/features/qpowerpoint/QPowerPoint.tsx

@@ -1,7 +1,7 @@
 import { useRef, useState } from "react";
 import type { CSSProperties } from "react";
 import { AlignCenter, AlignLeft, AlignRight, Bold, Copy, Download, EyeOff, FileText, FileUp, Image as ImageIcon, Italic, Link, List, ListOrdered, ListX, Palette, Plus, Save, Strikethrough, Trash2, Underline } from "lucide-react";
-import type { Slide, SlideDeck, SlideImage, SlideListStyle, SlideTextAlign, SlideTransition } from "../../types";
+import type { Slide, SlideDeck, SlideImage, SlideListStyle, SlideSizeId, SlideTextAlign, SlideTransition } from "../../types";
 import { downloadBlobFile, downloadTextFile } from "../../utils/download";
 import { exportPptxBlob, importPptxFile } from "../../io/powerPointOffice";
 import { replaceFileExtension } from "../../io/fileHelpers";
@@ -58,8 +58,20 @@ const slideTransitionOptions: Array<{ value: SlideTransition | ""; label: string
   { value: "wipe", label: "Шторка" }
 ];
 
-const slideWidthInches = 13.333;
+const slideSizeOptions: Array<{ id: SlideSizeId; label: string; width: number; height: number }> = [
-const slideHeightInches = 7.5;
+  { id: "wide", label: "Широкий 16:9", width: 13.333, height: 7.5 },
+  { id: "standard", label: "Стандартный 4:3", width: 10, height: 7.5 }
+];
+
+type SlideDimensions = { width: number; height: number };
+
+function normalizedSlideSizeId(value?: SlideSizeId): SlideSizeId {
+  return value === "standard" ? "standard" : "wide";
+}
+
+function slideDimensions(value?: SlideSizeId): SlideDimensions {
+  return slideSizeOptions.find((option) => option.id === normalizedSlideSizeId(value)) ?? slideSizeOptions[0];
+}
 
 function readFileAsDataUrl(file: File) {
   return new Promise<string>((resolve, reject) => {
@@ -99,18 +111,21 @@ function roundSlideNumber(value: number) {
   return Math.round(value * 10) / 10;
 }
 
-function slideImageStyle(image: SlideImage) {
+function slideImageStyle(image: SlideImage, dimensions: SlideDimensions) {
   return {
-    left: `${(image.x / slideWidthInches) * 100}%`,
+    left: `${(image.x / dimensions.width) * 100}%`,
-    top: `${(image.y / slideHeightInches) * 100}%`,
+    top: `${(image.y / dimensions.height) * 100}%`,
-    width: `${(image.width / slideWidthInches) * 100}%`,
+    width: `${(image.width / dimensions.width) * 100}%`,
-    height: `${(image.height / slideHeightInches) * 100}%`
+    height: `${(image.height / dimensions.height) * 100}%`
   };
 }
 
-function slideCanvasStyle(slide: Slide) {
+function slideCanvasStyle(slide: Slide, dimensions: SlideDimensions): CSSProperties {
   const backgroundColor = normalizedHexColor(slide.backgroundColor);
-  return backgroundColor ? { background: `#${backgroundColor}` } : undefined;
+  return {
+    aspectRatio: `${dimensions.width} / ${dimensions.height}`,
+    ...(backgroundColor ? { background: `#${backgroundColor}` } : {})
+  };
 }
 
 function slideTextStyle(
@@ -167,6 +182,7 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
   const activeSlide = deck.slides.find((slide) => slide.id === deck.activeSlideId) ?? deck.slides[0];
   const activeImages = activeSlide.images ?? [];
   const selectedImage = activeImages.find((image) => image.id === selectedImageId);
+  const activeSlideSize = slideDimensions(deck.slideSize);
 
   function updateSlide(nextSlide: Slide) {
     onChange({
@@ -266,6 +282,7 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
         ...deck,
         title: imported.title,
         activeSlideId: imported.slides[0]?.id ?? "slide-1",
+        slideSize: imported.slideSize ?? deck.slideSize ?? "wide",
         slides: imported.slides.length > 0 ? imported.slides : deck.slides
       });
     } catch (error) {
@@ -289,8 +306,8 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
         id: `slide-image-${Date.now()}`,
         src,
         alt: file.name,
-        x: roundSlideNumber(Math.max(0.4, slideWidthInches - size.width - 0.9)),
+        x: roundSlideNumber(Math.max(0.4, activeSlideSize.width - size.width - 0.9)),
-        y: roundSlideNumber(Math.max(1.4, slideHeightInches - size.height - 0.8)),
+        y: roundSlideNumber(Math.max(1.4, activeSlideSize.height - size.height - 0.8)),
         ...size
       };
 
@@ -466,6 +483,20 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
                 ))}
               </select>
             </label>
+            <label className="office-field">
+              <span>Размер</span>
+              <select
+                value={normalizedSlideSizeId(deck.slideSize)}
+                onChange={(event) => onChange({ ...deck, slideSize: event.target.value as SlideSizeId })}
+                aria-label="Размер слайда"
+              >
+                {slideSizeOptions.map((option) => (
+                  <option key={option.id} value={option.id}>
+                    {option.label}
+                  </option>
+                ))}
+              </select>
+            </label>
             <div className="slide-background-swatches" aria-label="Фон слайда">
               <Palette size={16} aria-hidden="true" />
               {backgroundColorSwatches.map((swatch) => (
@@ -783,10 +814,10 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
                     <input
                       type="number"
                       min="0"
-                      max={slideWidthInches}
+                      max={activeSlideSize.width}
                       step="0.1"
                       value={selectedImage.x}
-                      onChange={(event) => updateSelectedImageNumber("x", event.target.value, slideWidthInches)}
+                      onChange={(event) => updateSelectedImageNumber("x", event.target.value, activeSlideSize.width)}
                     />
                   </label>
                   <label>
@@ -794,10 +825,10 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
                     <input
                       type="number"
                       min="0"
-                      max={slideHeightInches}
+                      max={activeSlideSize.height}
                       step="0.1"
                       value={selectedImage.y}
-                      onChange={(event) => updateSelectedImageNumber("y", event.target.value, slideHeightInches)}
+                      onChange={(event) => updateSelectedImageNumber("y", event.target.value, activeSlideSize.height)}
                     />
                   </label>
                   <label>
@@ -805,10 +836,10 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
                     <input
                       type="number"
                       min="0.1"
-                      max={slideWidthInches}
+                      max={activeSlideSize.width}
                       step="0.1"
                       value={selectedImage.width}
-                      onChange={(event) => updateSelectedImageNumber("width", event.target.value, slideWidthInches)}
+                      onChange={(event) => updateSelectedImageNumber("width", event.target.value, activeSlideSize.width)}
                     />
                   </label>
                   <label>
@@ -816,10 +847,10 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
                     <input
                       type="number"
                       min="0.1"
-                      max={slideHeightInches}
+                      max={activeSlideSize.height}
                       step="0.1"
                       value={selectedImage.height}
-                      onChange={(event) => updateSelectedImageNumber("height", event.target.value, slideHeightInches)}
+                      onChange={(event) => updateSelectedImageNumber("height", event.target.value, activeSlideSize.height)}
                     />
                   </label>
                 </div>
@@ -854,13 +885,13 @@ export function QPowerPoint({ deck, onChange }: QPowerPointProps) {
           </label>
         </div>
 
-        <div className={`slide-canvas theme-${activeSlide.theme}`} style={slideCanvasStyle(activeSlide)}>
+        <div className={`slide-canvas theme-${activeSlide.theme}`} style={slideCanvasStyle(activeSlide, activeSlideSize)}>
           {activeImages.map((image) => (
             <button
               key={image.id}
               type="button"
               className={`slide-image-object ${image.id === selectedImageId ? "is-selected" : ""}`}
-              style={slideImageStyle(image)}
+              style={slideImageStyle(image, activeSlideSize)}
               onClick={() => setSelectedImageId(image.id)}
               title={image.alt || "Изображение"}
               aria-label={image.alt || "Изображение слайда"}

src/features/qword/QWord.test.tsx

@@ -3,7 +3,7 @@ import { useState } from "react";
 import { afterEach, describe, expect, it } from "vitest";
 import { vi } from "vitest";
 import type { WordDocument } from "../../types";
-import { QWord, qwordCurrentPageFromViewport } from "./QWord";
+import { QWord, qwordCurrentPageFromViewport, qwordPageCountFromContent } from "./QWord";
 
 afterEach(() => {
   cleanup();
@@ -20,6 +20,21 @@ describe("qwordCurrentPageFromViewport", () => {
     expect(qwordCurrentPageFromViewport({ stageTop: 34, paperTop: -1200, pageHeight: 1123, pageCount: 3, zoom: 1 })).toBe(2);
     expect(qwordCurrentPageFromViewport({ stageTop: 34, paperTop: -1200, pageHeight: 1123, pageCount: 3, zoom: 1.2 })).toBe(1);
   });
+
+  it("does not advance the current page while the viewport is inside the inter-page gap", () => {
+    expect(qwordCurrentPageFromViewport({ stageTop: 0, paperTop: -110, pageHeight: 100, pageGap: 20, pageCount: 3, zoom: 1 })).toBe(1);
+    expect(qwordCurrentPageFromViewport({ stageTop: 0, paperTop: -125, pageHeight: 100, pageGap: 20, pageCount: 3, zoom: 1 })).toBe(2);
+  });
+});
+
+describe("qwordPageCountFromContent", () => {
+  it("keeps manual page breaks as a minimum page count even when content height is short", () => {
+    expect(qwordPageCountFromContent({ scrollHeight: 300, pageHeight: 1123, manualPageBreakCount: 2 })).toBe(3);
+  });
+
+  it("keeps content height page count when it exceeds manual page breaks", () => {
+    expect(qwordPageCountFromContent({ scrollHeight: 2400, pageHeight: 1123, manualPageBreakCount: 1 })).toBe(3);
+  });
 });
 
 describe("QWord", () => {
@@ -101,6 +116,140 @@ describe("QWord", () => {
     }
   });
 
+  it("показывает отдельный лист для ручного разрыва страницы даже при коротком содержимом", async () => {
+    const originalResizeObserver = globalThis.ResizeObserver;
+    const originalRequestAnimationFrame = window.requestAnimationFrame;
+
+    globalThis.ResizeObserver = class {
+      observe() {}
+      disconnect() {}
+    } as unknown as typeof ResizeObserver;
+    window.requestAnimationFrame = ((callback: FrameRequestCallback) => {
+      callback(0);
+      return 1;
+    }) as typeof window.requestAnimationFrame;
+
+    const document: WordDocument = {
+      id: "word-manual-break-pages-test",
+      title: "Разрыв.docx",
+      updatedAt: "2026-06-04T00:00:00.000Z",
+      html: '<p>Первая страница</p><span data-qoffice-page-break="true" contenteditable="false"></span><p>Вторая страница</p>'
+    };
+
+    try {
+      const view = render(<QWord document={document} onChange={vi.fn()} />);
+      const stage = view.getByLabelText("Редактор QWord");
+      const paper = view.getByLabelText("Содержимое документа");
+      const frame = view.container.querySelector(".paper-frame") as HTMLElement;
+
+      paper.style.setProperty("--qword-page-height", "1123px");
+      Object.defineProperty(paper, "scrollHeight", { configurable: true, value: 300 });
+      fireEvent.scroll(stage);
+
+      await waitFor(() => expect(view.container.querySelectorAll(".page-sheet")).toHaveLength(2));
+      expect(frame.style.getPropertyValue("--qword-page-count")).toBe("2");
+      expect(frame.style.minHeight).toBe("2274px");
+      expect(view.container.querySelectorAll(".page-break-guides span")).toHaveLength(1);
+    } finally {
+      globalThis.ResizeObserver = originalResizeObserver;
+      window.requestAnimationFrame = originalRequestAnimationFrame;
+    }
+  });
+
+  it("меняет поля, размер и ориентацию страницы на вкладке Макет", async () => {
+    const originalResizeObserver = globalThis.ResizeObserver;
+    const originalRequestAnimationFrame = window.requestAnimationFrame;
+    const onChange = vi.fn();
+
+    globalThis.ResizeObserver = class {
+      observe() {}
+      disconnect() {}
+    } as unknown as typeof ResizeObserver;
+    window.requestAnimationFrame = ((callback: FrameRequestCallback) => {
+      callback(0);
+      return 1;
+    }) as typeof window.requestAnimationFrame;
+
+    const document: WordDocument = {
+      id: "word-page-setup-test",
+      title: "Макет.docx",
+      updatedAt: "2026-06-04T00:00:00.000Z",
+      html: "<p>Текст страницы</p>"
+    };
+
+    function StatefulQWord() {
+      const [currentDocument, setCurrentDocument] = useState(document);
+      return (
+        <QWord
+          document={currentDocument}
+          onChange={(nextDocument) => {
+            onChange(nextDocument);
+            setCurrentDocument(nextDocument);
+          }}
+        />
+      );
+    }
+
+    try {
+      const view = render(<StatefulQWord />);
+      const frame = view.container.querySelector(".paper-frame") as HTMLElement;
+
+      expect(frame.style.getPropertyValue("--qword-page-width")).toBe("794px");
+      expect(frame.style.getPropertyValue("--qword-page-height")).toBe("1123px");
+      expect(frame.style.getPropertyValue("--qword-page-margin-left")).toBe("86px");
+
+      fireEvent.click(screen.getByRole("tab", { name: "Макет" }));
+      fireEvent.change(screen.getByLabelText("Поля страницы"), { target: { value: "narrow" } });
+      fireEvent.change(screen.getByLabelText("Размер страницы"), { target: { value: "letter" } });
+      fireEvent.change(screen.getByLabelText("Ориентация страницы"), { target: { value: "landscape" } });
+
+      await waitFor(() => expect(frame.style.getPropertyValue("--qword-page-height")).toBe("816px"));
+      expect(frame.style.getPropertyValue("--qword-page-width")).toBe("1056px");
+      expect(frame.style.getPropertyValue("--qword-page-margin-top")).toBe("48px");
+      expect(frame.style.getPropertyValue("--qword-page-margin-right")).toBe("48px");
+      expect(frame.style.minHeight).toBe("816px");
+      expect(onChange).toHaveBeenLastCalledWith(expect.objectContaining({ pageSetup: { size: "letter", orientation: "landscape", marginPreset: "narrow" } }));
+    } finally {
+      globalThis.ResizeObserver = originalResizeObserver;
+      window.requestAnimationFrame = originalRequestAnimationFrame;
+    }
+  });
+
+  it("применяет сохраненные в документе параметры страницы при открытии QWord", () => {
+    const originalResizeObserver = globalThis.ResizeObserver;
+    const originalRequestAnimationFrame = window.requestAnimationFrame;
+
+    globalThis.ResizeObserver = class {
+      observe() {}
+      disconnect() {}
+    } as unknown as typeof ResizeObserver;
+    window.requestAnimationFrame = ((callback: FrameRequestCallback) => {
+      callback(0);
+      return 1;
+    }) as typeof window.requestAnimationFrame;
+
+    const document: WordDocument = {
+      id: "word-saved-page-setup-test",
+      title: "Сохраненный макет.docx",
+      updatedAt: "2026-06-04T00:00:00.000Z",
+      html: "<p>Текст страницы</p>",
+      pageSetup: { size: "letter", orientation: "landscape", marginPreset: "wide" }
+    };
+
+    try {
+      const view = render(<QWord document={document} onChange={vi.fn()} />);
+      const frame = view.container.querySelector(".paper-frame") as HTMLElement;
+
+      expect(frame.style.getPropertyValue("--qword-page-width")).toBe("1056px");
+      expect(frame.style.getPropertyValue("--qword-page-height")).toBe("816px");
+      expect(frame.style.getPropertyValue("--qword-page-margin-left")).toBe("116px");
+      expect(frame.style.getPropertyValue("--qword-page-margin-top")).toBe("92px");
+    } finally {
+      globalThis.ResizeObserver = originalResizeObserver;
+      window.requestAnimationFrame = originalRequestAnimationFrame;
+    }
+  });
+
   it("переключает вкладки ленты и показывает команды выбранной вкладки", () => {
     const originalResizeObserver = globalThis.ResizeObserver;
     const originalRequestAnimationFrame = window.requestAnimationFrame;
@@ -181,6 +330,135 @@ describe("QWord", () => {
     }
   });
 
+  it("сохраняет позицию курсора при наборе текста в документе", async () => {
+    const originalResizeObserver = globalThis.ResizeObserver;
+    const originalRequestAnimationFrame = window.requestAnimationFrame;
+    const onChange = vi.fn();
+
+    globalThis.ResizeObserver = class {
+      observe() {}
+      disconnect() {}
+    } as unknown as typeof ResizeObserver;
+    window.requestAnimationFrame = ((callback: FrameRequestCallback) => {
+      callback(0);
+      return 1;
+    }) as typeof window.requestAnimationFrame;
+
+    const document: WordDocument = {
+      id: "word-caret-input-test",
+      title: "Курсор.docx",
+      updatedAt: "2026-06-04T00:00:00.000Z",
+      html: "<p>Начало</p>"
+    };
+
+    function StatefulQWord() {
+      const [currentDocument, setCurrentDocument] = useState(document);
+      return (
+        <QWord
+          document={currentDocument}
+          onChange={(nextDocument) => {
+            onChange(nextDocument);
+            setCurrentDocument(nextDocument);
+          }}
+        />
+      );
+    }
+
+    try {
+      render(<StatefulQWord />);
+      const paper = screen.getByLabelText("Содержимое документа");
+      const textNode = paper.querySelector("p")?.firstChild;
+      expect(textNode).toBeInstanceOf(Text);
+
+      const typedText = "Начало текст";
+      textNode!.textContent = typedText;
+      const range = window.document.createRange();
+      range.setStart(textNode!, typedText.length);
+      range.collapse(true);
+      window.getSelection()?.removeAllRanges();
+      window.getSelection()?.addRange(range);
+
+      fireEvent.input(paper);
+
+      await waitFor(() => expect(onChange).toHaveBeenCalledWith(expect.objectContaining({ html: `<p>${typedText}</p>` })));
+      const selection = window.getSelection();
+      expect(selection?.anchorNode).toBe(textNode);
+      expect(selection?.anchorOffset).toBe(typedText.length);
+    } finally {
+      globalThis.ResizeObserver = originalResizeObserver;
+      window.requestAnimationFrame = originalRequestAnimationFrame;
+    }
+  });
+
+  it("сохраняет позицию курсора после нормализации HTML родительским состоянием", async () => {
+    const originalResizeObserver = globalThis.ResizeObserver;
+    const originalRequestAnimationFrame = window.requestAnimationFrame;
+    const onChange = vi.fn();
+
+    globalThis.ResizeObserver = class {
+      observe() {}
+      disconnect() {}
+    } as unknown as typeof ResizeObserver;
+    window.requestAnimationFrame = ((callback: FrameRequestCallback) => {
+      callback(0);
+      return 1;
+    }) as typeof window.requestAnimationFrame;
+
+    const document: WordDocument = {
+      id: "word-caret-normalized-input-test",
+      title: "Курсор.docx",
+      updatedAt: "2026-06-04T00:00:00.000Z",
+      html: "<p>Начало</p>"
+    };
+
+    function StatefulQWord() {
+      const [currentDocument, setCurrentDocument] = useState(document);
+      return (
+        <QWord
+          document={currentDocument}
+          onChange={(nextDocument) => {
+            const normalizedDocument = {
+              ...nextDocument,
+              html: nextDocument.html.replace("<p>", '<p data-normalized="true">')
+            };
+            onChange(normalizedDocument);
+            setCurrentDocument(normalizedDocument);
+          }}
+        />
+      );
+    }
+
+    try {
+      render(<StatefulQWord />);
+      const paper = screen.getByLabelText("Содержимое документа");
+      const textNode = paper.querySelector("p")?.firstChild;
+      expect(textNode).toBeInstanceOf(Text);
+
+      const typedText = "Начало текст";
+      textNode!.textContent = typedText;
+      const range = window.document.createRange();
+      range.setStart(textNode!, typedText.length);
+      range.collapse(true);
+      window.getSelection()?.removeAllRanges();
+      window.getSelection()?.addRange(range);
+
+      fireEvent.input(paper);
+
+      await waitFor(() =>
+        expect(onChange).toHaveBeenCalledWith(expect.objectContaining({ html: `<p data-normalized="true">${typedText}</p>` }))
+      );
+      await waitFor(() => {
+        const normalizedTextNode = paper.querySelector("p")?.firstChild;
+        const selection = window.getSelection();
+        expect(selection?.anchorNode).toBe(normalizedTextNode);
+        expect(selection?.anchorOffset).toBe(typedText.length);
+      });
+    } finally {
+      globalThis.ResizeObserver = originalResizeObserver;
+      window.requestAnimationFrame = originalRequestAnimationFrame;
+    }
+  });
+
   it("вставляет таблицу выбранного размера через вкладку Вставка", () => {
     const originalResizeObserver = globalThis.ResizeObserver;
     const originalRequestAnimationFrame = window.requestAnimationFrame;

src/features/qword/QWord.tsx

@@ -1,4 +1,4 @@
-import { useLayoutEffect, useMemo, useRef, useState } from "react";
+import { useCallback, useLayoutEffect, useMemo, useRef, useState } from "react";
 import type { CSSProperties, MouseEvent } from "react";
 import {
   AlignCenter,
@@ -32,7 +32,7 @@ import {
   Rows3,
   Underline
 } from "lucide-react";
-import type { WordDocument } from "../../types";
+import type { WordDocument, WordPageMarginPreset, WordPageOrientation, WordPageSetup, WordPageSizeId } from "../../types";
 import { downloadBlobFile, downloadTextFile } from "../../utils/download";
 import { exportDocxBlob, importDocxFile } from "../../io/wordOffice";
 import { replaceFileExtension } from "../../io/fileHelpers";
@@ -43,8 +43,10 @@ import { useQOfficeCommand } from "../../hooks/useQOfficeCommand";
 interface QWordProps {
   document: WordDocument;
   zoom?: number;
+  viewMode?: WordViewMode;
   onChange: (document: WordDocument) => void;
   onStatusChange?: (status: QWordStatus) => void;
+  onViewModeChange?: (viewMode: WordViewMode) => void;
 }
 
 interface TableCellLocation {
@@ -53,6 +55,13 @@ interface TableCellLocation {
   cellIndex: number;
 }
 
+interface EditorSelectionBookmark {
+  anchorOffset: number;
+  anchorPath: number[];
+  focusOffset: number;
+  focusPath: number[];
+}
+
 export interface QWordStatus {
   currentPage: number;
   pageCount: number;
@@ -153,8 +162,7 @@ const styleGalleryOptions = [
   { value: "blockquote", label: "Цитата" }
 ];
 type WordRibbonTabId = "file" | "home" | "insert" | "design" | "layout" | "references" | "mailings" | "review" | "view" | "help";
-type WordViewMode = "print" | "read" | "web";
+export type WordViewMode = "print" | "read" | "web";
-
 const wordRibbonTabs: Array<{ id: WordRibbonTabId; label: string }> = [
   { id: "file", label: "Файл" },
   { id: "home", label: "Главная" },
@@ -173,6 +181,20 @@ const wordViewModes: Array<{ id: WordViewMode; label: string }> = [
   { id: "read", label: "Чтение" },
   { id: "web", label: "Веб-документ" }
 ];
+const wordPageSizeOptions: Array<{ id: WordPageSizeId; label: string; width: number; height: number }> = [
+  { id: "a4", label: "A4", width: 794, height: 1123 },
+  { id: "letter", label: "Letter", width: 816, height: 1056 }
+];
+const wordPageOrientationOptions: Array<{ id: WordPageOrientation; label: string }> = [
+  { id: "portrait", label: "Книжная" },
+  { id: "landscape", label: "Альбомная" }
+];
+const wordPageMarginOptions: Array<{ id: WordPageMarginPreset; label: string; margins: { top: number; right: number; bottom: number; left: number } }> = [
+  { id: "normal", label: "Обычные", margins: { top: 72, right: 86, bottom: 72, left: 86 } },
+  { id: "narrow", label: "Узкие", margins: { top: 48, right: 48, bottom: 48, left: 48 } },
+  { id: "wide", label: "Широкие", margins: { top: 92, right: 116, bottom: 92, left: 116 } }
+];
+const defaultWordPageSetup: WordPageSetup = { size: "a4", orientation: "portrait", marginPreset: "normal" };
 const tableSizeOptions = [1, 2, 3, 4, 5, 6, 7, 8];
 
 function findInPage(query: string) {
@@ -187,6 +209,27 @@ function pageHeightFromStyles(element: HTMLElement) {
   return Number.isFinite(pageHeight) && pageHeight > 0 ? pageHeight : defaultPageViewHeight;
 }
 
+function qwordPageDimensions(setup: WordPageSetup) {
+  const size = wordPageSizeOptions.find((option) => option.id === setup.size) ?? wordPageSizeOptions[0];
+  return setup.orientation === "landscape" ? { width: size.height, height: size.width } : { width: size.width, height: size.height };
+}
+
+function qwordPageMargins(setup: WordPageSetup) {
+  return (wordPageMarginOptions.find((option) => option.id === setup.marginPreset) ?? wordPageMarginOptions[0]).margins;
+}
+
+function normalizedWordPageSetup(setup?: WordDocument["pageSetup"]): WordPageSetup {
+  const candidateSize = setup?.size;
+  const candidateOrientation = setup?.orientation;
+  const candidateMarginPreset = setup?.marginPreset;
+  const size = candidateSize && wordPageSizeOptions.some((option) => option.id === candidateSize) ? candidateSize : defaultWordPageSetup.size;
+  const orientation =
+    candidateOrientation && wordPageOrientationOptions.some((option) => option.id === candidateOrientation) ? candidateOrientation : defaultWordPageSetup.orientation;
+  const marginPreset =
+    candidateMarginPreset && wordPageMarginOptions.some((option) => option.id === candidateMarginPreset) ? candidateMarginPreset : defaultWordPageSetup.marginPreset;
+  return { size, orientation, marginPreset };
+}
+
 function clampedTableSize(value: number) {
   return Number.isFinite(value) ? Math.min(8, Math.max(1, Math.trunc(value))) : 3;
 }
@@ -231,6 +274,97 @@ function tableCellFromLocation(editor: HTMLElement, location: TableCellLocation)
   return cell instanceof HTMLTableCellElement ? cell : undefined;
 }
 
+function editorContainsNode(editor: HTMLElement, node: Node) {
+  return node === editor || editor.contains(node);
+}
+
+function editorNodePath(editor: HTMLElement, node: Node): number[] | undefined {
+  if (node === editor) {
+    return [];
+  }
+
+  const path: number[] = [];
+  let current: Node | null = node;
+  while (current && current !== editor) {
+    const parent: Node | null = current.parentNode;
+    if (!parent) {
+      return undefined;
+    }
+
+    const siblings = Array.from(parent.childNodes) as Node[];
+    const index = siblings.indexOf(current);
+    if (index < 0) {
+      return undefined;
+    }
+
+    path.unshift(index);
+    current = parent;
+  }
+
+  return current === editor ? path : undefined;
+}
+
+function editorNodeFromPath(editor: HTMLElement, path: number[]): Node | undefined {
+  let current: Node = editor;
+  for (const index of path) {
+    const child = current.childNodes[index];
+    if (!child) {
+      return undefined;
+    }
+    current = child;
+  }
+  return current;
+}
+
+function clampedSelectionOffset(node: Node, offset: number) {
+  const maxOffset = node.nodeType === Node.TEXT_NODE ? (node.textContent ?? "").length : node.childNodes.length;
+  return Math.min(Math.max(0, offset), maxOffset);
+}
+
+function editorSelectionBookmark(editor: HTMLElement): EditorSelectionBookmark | undefined {
+  const selection = window.getSelection();
+  const anchorNode = selection?.anchorNode;
+  const focusNode = selection?.focusNode;
+  if (!selection || selection.rangeCount === 0 || !anchorNode || !focusNode || !editorContainsNode(editor, anchorNode) || !editorContainsNode(editor, focusNode)) {
+    return undefined;
+  }
+
+  const anchorPath = editorNodePath(editor, anchorNode);
+  const focusPath = editorNodePath(editor, focusNode);
+  if (!anchorPath || !focusPath) {
+    return undefined;
+  }
+
+  return {
+    anchorOffset: selection.anchorOffset,
+    anchorPath,
+    focusOffset: selection.focusOffset,
+    focusPath
+  };
+}
+
+function restoreEditorSelection(editor: HTMLElement, bookmark: EditorSelectionBookmark) {
+  const anchorNode = editorNodeFromPath(editor, bookmark.anchorPath);
+  const focusNode = editorNodeFromPath(editor, bookmark.focusPath);
+  const selection = window.getSelection();
+  if (!anchorNode || !focusNode || !selection) {
+    return;
+  }
+
+  const anchorOffset = clampedSelectionOffset(anchorNode, bookmark.anchorOffset);
+  const focusOffset = clampedSelectionOffset(focusNode, bookmark.focusOffset);
+  selection.removeAllRanges();
+  if (typeof selection.setBaseAndExtent === "function") {
+    selection.setBaseAndExtent(anchorNode, anchorOffset, focusNode, focusOffset);
+    return;
+  }
+
+  const range = globalThis.document.createRange();
+  range.setStart(anchorNode, anchorOffset);
+  range.setEnd(focusNode, focusOffset);
+  selection.addRange(range);
+}
+
 function placeCaretInTableCell(cell: HTMLTableCellElement) {
   if (cell.childNodes.length === 0) {
     cell.append(globalThis.document.createElement("br"));
@@ -248,37 +382,88 @@ function keepEditorSelection(event: MouseEvent<HTMLButtonElement>) {
   event.preventDefault();
 }
 
-export function qwordCurrentPageFromViewport(input: { stageTop: number; paperTop: number; pageHeight: number; pageCount: number; zoom: number }) {
+export function qwordCurrentPageFromViewport(input: { stageTop: number; paperTop: number; pageHeight: number; pageCount: number; zoom: number; pageGap?: number }) {
   const pageCount = Math.max(1, input.pageCount);
   const zoom = Number.isFinite(input.zoom) && input.zoom > 0 ? input.zoom : 1;
-  const visualPageHeight = Math.max(1, input.pageHeight * zoom);
+  const pageGap = Number.isFinite(input.pageGap) && input.pageGap ? Math.max(0, input.pageGap) : 0;
+  const visualPageStride = Math.max(1, (input.pageHeight + pageGap) * zoom);
   const visiblePaperOffset = Math.max(0, input.stageTop - input.paperTop);
-  return Math.min(pageCount, Math.max(1, Math.floor(visiblePaperOffset / visualPageHeight) + 1));
+  return Math.min(pageCount, Math.max(1, Math.floor(visiblePaperOffset / visualPageStride) + 1));
 }
 
-export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordProps) {
+export function qwordPageCountFromContent(input: { scrollHeight: number; pageHeight: number; manualPageBreakCount?: number }) {
+  const pageHeight = Number.isFinite(input.pageHeight) && input.pageHeight > 0 ? input.pageHeight : defaultPageViewHeight;
+  const scrollHeight = Number.isFinite(input.scrollHeight) && input.scrollHeight > 0 ? input.scrollHeight : 0;
+  const manualPageBreakCount =
+    Number.isFinite(input.manualPageBreakCount) && input.manualPageBreakCount ? Math.max(0, Math.trunc(input.manualPageBreakCount)) : 0;
+  return Math.max(1, Math.ceil(scrollHeight / pageHeight), manualPageBreakCount + 1);
+}
+
+export function QWord({ document, zoom = 100, viewMode, onChange, onStatusChange, onViewModeChange }: QWordProps) {
   const stageRef = useRef<HTMLElement>(null);
   const editorRef = useRef<HTMLDivElement>(null);
   const activeTableCellRef = useRef<HTMLTableCellElement | null>(null);
   const activeTableCellLocationRef = useRef<TableCellLocation | null>(null);
   const restoreActiveTableCellAfterRenderRef = useRef(false);
+  const pendingEditorSelectionRestoreRef = useRef<EditorSelectionBookmark | null>(null);
   const fileInputRef = useRef<HTMLInputElement>(null);
   const imageInputRef = useRef<HTMLInputElement>(null);
   const [activeRibbonTab, setActiveRibbonTab] = useState<WordRibbonTabId>("home");
-  const [viewMode, setViewMode] = useState<WordViewMode>("print");
+  const [internalViewMode, setInternalViewMode] = useState<WordViewMode>("print");
   const [tableRowCount, setTableRowCount] = useState(3);
   const [tableColumnCount, setTableColumnCount] = useState(3);
   const [pageView, setPageView] = useState({ count: 1, current: 1, height: defaultPageViewHeight });
   const wordCount = useMemo(() => countWords(document.html), [document.html]);
+  const pageSetup = useMemo(() => normalizedWordPageSetup(document.pageSetup), [document.pageSetup]);
   const stageStyle = { "--qword-zoom": String(zoom / 100) } as CSSProperties;
+  const pageDimensions = qwordPageDimensions(pageSetup);
+  const pageMargins = qwordPageMargins(pageSetup);
   const pageFrameStyle = {
     "--qword-page-count": String(pageView.count),
     "--qword-page-gap": `${defaultPageGap}px`,
+    "--qword-page-width": `${pageDimensions.width}px`,
+    "--qword-page-height": `${pageDimensions.height}px`,
+    "--qword-page-margin-top": `${pageMargins.top}px`,
+    "--qword-page-margin-right": `${pageMargins.right}px`,
+    "--qword-page-margin-bottom": `${pageMargins.bottom}px`,
+    "--qword-page-margin-left": `${pageMargins.left}px`,
     minHeight: `${pageView.count * pageView.height + Math.max(0, pageView.count - 1) * defaultPageGap}px`,
     paddingBottom: pageView.count > 1 ? `${(pageView.count - 1) * defaultPageGap}px` : undefined
   } as CSSProperties;
   const activeRibbonTabLabel = wordRibbonTabs.find((tab) => tab.id === activeRibbonTab)?.label ?? "Главная";
-  const stageClassName = ["document-stage", `qword-view-${viewMode}`].join(" ");
+  const activeViewMode = viewMode ?? internalViewMode;
+  const stageClassName = ["document-stage", `qword-view-${activeViewMode}`].join(" ");
+
+  const changeViewMode = useCallback(
+    (nextViewMode: WordViewMode) => {
+      setInternalViewMode(nextViewMode);
+      onViewModeChange?.(nextViewMode);
+    },
+    [onViewModeChange]
+  );
+
+  const changePageSetup = useCallback(
+    (nextPageSetup: Partial<WordPageSetup>) => {
+      onChange({ ...document, pageSetup: normalizedWordPageSetup({ ...pageSetup, ...nextPageSetup }) });
+      refreshPageView();
+    },
+    [document, onChange, pageSetup]
+  );
+
+  useLayoutEffect(() => {
+    const editor = editorRef.current;
+    if (!editor || editor.innerHTML === document.html) {
+      pendingEditorSelectionRestoreRef.current = null;
+      return;
+    }
+
+    const pendingSelection = pendingEditorSelectionRestoreRef.current;
+    pendingEditorSelectionRestoreRef.current = null;
+    editor.innerHTML = document.html;
+    if (pendingSelection) {
+      restoreEditorSelection(editor, pendingSelection);
+    }
+  }, [document.html]);
 
   function currentPageFromStage(pageCount: number, pageHeight: number) {
     const stage = stageRef.current;
@@ -295,7 +480,8 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
       paperTop: paperRect.top,
       pageHeight,
       pageCount,
-      zoom: Number.isFinite(currentZoom) ? currentZoom : 1
+      zoom: Number.isFinite(currentZoom) ? currentZoom : 1,
+      pageGap: defaultPageGap
     });
   }
 
@@ -307,7 +493,8 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
       }
 
       const height = pageHeightFromStyles(editor);
-      const count = Math.max(1, Math.ceil(editor.scrollHeight / height));
+      const manualPageBreakCount = editor.querySelectorAll('[data-qoffice-page-break="true"]').length;
+      const count = qwordPageCountFromContent({ scrollHeight: editor.scrollHeight, pageHeight: height, manualPageBreakCount });
       const currentPage = currentPageFromStage(count, height);
       setPageView((current) =>
         current.count === count && current.height === height && current.current === currentPage ? current : { count, current: currentPage, height }
@@ -325,7 +512,7 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
     const observer = new ResizeObserver(refreshPageView);
     observer.observe(editor);
     return () => observer.disconnect();
-  }, [document.html, zoom]);
+  }, [document.html, pageDimensions.height, pageDimensions.width, pageMargins.bottom, pageMargins.left, pageMargins.right, pageMargins.top, zoom]);
 
   useLayoutEffect(() => {
     if (!restoreActiveTableCellAfterRenderRef.current) {
@@ -353,9 +540,7 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
   function runCommand(command: string, value?: string) {
     editorRef.current?.focus();
     globalThis.document.execCommand(command, false, value);
-    if (editorRef.current) {
+    updateHtml();
-      onChange({ ...document, html: editorRef.current.innerHTML });
-    }
   }
 
   function applyTextColor(color: string) {
@@ -628,8 +813,10 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
 
   function updateHtml() {
     rememberActiveTableCell();
-    if (editorRef.current) {
+    const editor = editorRef.current;
-      onChange({ ...document, html: editorRef.current.innerHTML });
+    if (editor) {
+      pendingEditorSelectionRestoreRef.current = editorSelectionBookmark(editor) ?? null;
+      onChange({ ...document, html: editor.innerHTML });
       refreshPageView();
     }
   }
@@ -641,7 +828,7 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
 
     try {
       const imported = await importDocxFile(file);
-      onChange({ ...document, title: imported.title, html: imported.html });
+      onChange({ ...document, title: imported.title, html: imported.html, ...(imported.pageSetup ? { pageSetup: imported.pageSetup } : {}) });
     } catch (error) {
       window.alert(error instanceof Error ? error.message : "Не удалось открыть DOCX.");
     } finally {
@@ -654,7 +841,7 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
   async function saveDocx() {
     try {
       const fileName = replaceFileExtension(document.title, ".docx");
-      const blob = await exportDocxBlob(document.title, editorRef.current?.innerHTML ?? document.html);
+      const blob = await exportDocxBlob(document.title, editorRef.current?.innerHTML ?? document.html, { pageSetup: document.pageSetup });
       if (isDesktopOfficeBridgeAvailable()) {
         await saveDesktopOfficeFile("docx", fileName, blob);
         return;
@@ -855,6 +1042,56 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
             </section>
             ) : null}
 
+            {activeRibbonTab === "layout" ? (
+            <section className="word-ribbon-group word-page-setup-group" aria-label="Параметры страницы">
+              <div className="word-page-setup-controls">
+                <label className="word-mini-field">
+                  <span>Поля</span>
+                  <select
+                    aria-label="Поля страницы"
+                    value={pageSetup.marginPreset}
+                    onChange={(event) => changePageSetup({ marginPreset: event.target.value as WordPageMarginPreset })}
+                  >
+                    {wordPageMarginOptions.map((option) => (
+                      <option key={option.id} value={option.id}>
+                        {option.label}
+                      </option>
+                    ))}
+                  </select>
+                </label>
+                <label className="word-mini-field">
+                  <span>Размер</span>
+                  <select
+                    aria-label="Размер страницы"
+                    value={pageSetup.size}
+                    onChange={(event) => changePageSetup({ size: event.target.value as WordPageSizeId })}
+                  >
+                    {wordPageSizeOptions.map((option) => (
+                      <option key={option.id} value={option.id}>
+                        {option.label}
+                      </option>
+                    ))}
+                  </select>
+                </label>
+                <label className="word-mini-field">
+                  <span>Ориентация</span>
+                  <select
+                    aria-label="Ориентация страницы"
+                    value={pageSetup.orientation}
+                    onChange={(event) => changePageSetup({ orientation: event.target.value as WordPageOrientation })}
+                  >
+                    {wordPageOrientationOptions.map((option) => (
+                      <option key={option.id} value={option.id}>
+                        {option.label}
+                      </option>
+                    ))}
+                  </select>
+                </label>
+              </div>
+              <span className="word-ribbon-title">Параметры страницы</span>
+            </section>
+            ) : null}
+
             {activeRibbonTab === "home" || activeRibbonTab === "layout" ? (
             <section className="word-ribbon-group word-paragraph-group" aria-label="Абзац">
               <div className="segmented-tools" aria-label="Списки">
@@ -961,11 +1198,11 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
                 {wordViewModes.map((mode) => (
                   <button
                     key={mode.id}
-                    className={`compact-command${viewMode === mode.id ? " is-active" : ""}`}
+                    className={`compact-command${activeViewMode === mode.id ? " is-active" : ""}`}
                     type="button"
                     aria-label={mode.label}
-                    aria-pressed={viewMode === mode.id}
+                    aria-pressed={activeViewMode === mode.id}
-                    onClick={() => setViewMode(mode.id)}
+                    onClick={() => changeViewMode(mode.id)}
                   >
                     <FileText size={16} />
                     {mode.label}
@@ -1021,7 +1258,6 @@ export function QWord({ document, zoom = 100, onChange, onStatusChange }: QWordP
             onKeyUp={rememberActiveTableCell}
             onMouseDown={rememberActiveTableCellFromEvent}
             onMouseUp={rememberActiveTableCellFromEvent}
-            dangerouslySetInnerHTML={{ __html: document.html }}
             aria-label="Содержимое документа"
           />
           {pageView.count > 1 ? (

src/global.d.ts

@@ -1,7 +1,7 @@
 export {};
 
 type DesktopOfficeFileKind = "docx" | "xlsx" | "pptx" | "eml" | "mail";
-type QOfficeDesktopCommand = "open" | "save" | "export-pdf" | "print";
+type QOfficeDesktopCommand = "open" | "save" | "export-pdf" | "print" | "undo" | "redo";
 
 interface DesktopOpenOfficeFileResult {
   canceled: boolean;

src/hooks/useQOfficeCommand.test.tsx

@@ -1,5 +1,5 @@
-import { render, waitFor } from "@testing-library/react";
+import { cleanup, render, waitFor } from "@testing-library/react";
-import { describe, expect, it, vi } from "vitest";
+import { afterEach, describe, expect, it, vi } from "vitest";
 import { useQOfficeCommand } from "./useQOfficeCommand";
 
 function CommandProbe({ onSave, onExportPdf }: { onSave: () => void; onExportPdf?: () => void }) {
@@ -8,6 +8,10 @@ function CommandProbe({ onSave, onExportPdf }: { onSave: () => void; onExportPdf
 }
 
 describe("useQOfficeCommand", () => {
+  afterEach(() => {
+    cleanup();
+  });
+
   it("вызывает обработчик команды QOffice", async () => {
     const onSave = vi.fn();
     render(<CommandProbe onSave={onSave} />);
@@ -39,4 +43,23 @@ describe("useQOfficeCommand", () => {
     await waitFor(() => expect(onExportPdf).toHaveBeenCalledTimes(1));
     expect(onSave).not.toHaveBeenCalled();
   });
+
+  it("использует команду документа для undo и redo без обработчика приложения", async () => {
+    const originalExecCommand = document.execCommand;
+    const execCommand = vi.fn();
+    Object.defineProperty(document, "execCommand", { configurable: true, value: execCommand });
+
+    try {
+      render(<CommandProbe onSave={vi.fn()} />);
+
+      window.dispatchEvent(new CustomEvent("qoffice-command", { detail: { command: "undo" } }));
+      window.dispatchEvent(new CustomEvent("qoffice-command", { detail: { command: "redo" } }));
+
+      await waitFor(() => expect(execCommand).toHaveBeenCalledWith("redo"));
+      expect(execCommand).toHaveBeenNthCalledWith(1, "undo");
+      expect(execCommand).toHaveBeenNthCalledWith(2, "redo");
+    } finally {
+      Object.defineProperty(document, "execCommand", { configurable: true, value: originalExecCommand });
+    }
+  });
 });

src/hooks/useQOfficeCommand.ts

@@ -1,6 +1,6 @@
 import { useEffect, useRef } from "react";
 
-export type QOfficeCommand = "open" | "save" | "export-pdf" | "print";
+export type QOfficeCommand = "open" | "save" | "export-pdf" | "print" | "undo" | "redo";
 export type QOfficeCommandHandlers = Partial<Record<QOfficeCommand, () => void | Promise<void>>>;
 
 export function useQOfficeCommand(handlers: QOfficeCommandHandlers) {
@@ -16,6 +16,11 @@ export function useQOfficeCommand(handlers: QOfficeCommandHandlers) {
       const handler = handlersRef.current[command];
       if (handler) {
         void handler();
+        return;
+      }
+
+      if (command === "undo" || command === "redo") {
+        globalThis.document.execCommand?.(command);
       }
     }
 

src/io/excellOffice.test.ts

@@ -8,6 +8,8 @@ import {
   buildColumnWidthsXml,
   buildHyperlinksXml,
   buildMergeCellsXml,
+  buildPageMarginsXml,
+  buildPageSetupXml,
   buildSheetPrXml,
   buildSheetViewsXml,
   createCellStyleRegistry,
@@ -21,6 +23,7 @@ import {
   workbookPrintAreas,
   workbookRelationshipTargets,
   workbookSheetRefs,
+  workbookUsesDate1904,
   worksheetXmlToAutoFilter,
   worksheetXmlToCells,
   worksheetXmlToCellFormats,
@@ -31,12 +34,14 @@ import {
   worksheetXmlToHyperlinks,
   worksheetCommentsXmlToComments,
   worksheetXmlToMergedCells,
+  worksheetXmlToPageSetup,
   worksheetXmlToRowHeights,
   worksheetXmlToShowGridLines,
   worksheetXmlToTabColor,
   worksheetXmlToZoomScale,
   xlsxStylesXmlToCellFormatTable,
   xlsxThemeXmlToColors,
+  xlsxSafeSheetNames,
   xlsxCellToText
 } from "./excellOffice";
 
@@ -614,6 +619,38 @@ describe("excellOffice OOXML helpers", () => {
     ).toBe("sheet-7");
   });
 
+  it("detects the XLSX 1904 date system flag from workbook properties", () => {
+    expect(workbookUsesDate1904({ workbook: { workbookPr: { date1904: "1" } } })).toBe(true);
+    expect(workbookUsesDate1904({ workbook: { workbookPr: { date1904: "true" } } })).toBe(true);
+    expect(workbookUsesDate1904({ workbook: { workbookPr: { date1904: "0" } } })).toBe(false);
+  });
+
+  it("converts imported XLSX 1904 date serials to the QExcell 1900 serial system", async () => {
+    const zip = new JSZip();
+    zip.file(
+      "xl/workbook.xml",
+      `<workbook><workbookPr date1904="1"/><sheets><sheet name="Dates" sheetId="1" r:id="rId1"/></sheets></workbook>`
+    );
+    zip.file(
+      "xl/_rels/workbook.xml.rels",
+      `<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Target="worksheets/sheet1.xml"/></Relationships>`
+    );
+    zip.file("xl/styles.xml", `<styleSheet><cellXfs count="3"><xf numFmtId="0"/><xf numFmtId="14"/><xf numFmtId="20"/></cellXfs></styleSheet>`);
+    zip.file(
+      "xl/worksheets/sheet1.xml",
+      `<worksheet><sheetData><row r="1"><c r="A1" s="1"><v>43465</v></c><c r="B1"><v>5</v></c><c r="C1" s="2"><v>0.5</v></c></row></sheetData></worksheet>`
+    );
+
+    const blob = await zip.generateAsync({
+      type: "blob",
+      mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
+    });
+    const imported = await importXlsxFile(new File([blob], "Date1904.xlsx", { type: blob.type }));
+
+    expect(imported.sheets[0].cells).toEqual({ A1: "44927", B1: "5", C1: "0.5" });
+    expect(imported.sheets[0].cellFormats).toEqual({ A1: { numberFormat: "m/d/yy" }, C1: { numberFormat: "h:mm" } });
+  });
+
   it("сохраняет и импортирует активный лист XLSX через workbookView activeTab", async () => {
     const blob = await exportXlsxBlob({
       id: "book-1",
@@ -633,6 +670,38 @@ describe("excellOffice OOXML helpers", () => {
     expect(imported.activeSheet).toBe("sheet-2");
   });
 
+  it("normalizes XLSX sheet names to Excel-safe unique names on export", async () => {
+    expect(
+      xlsxSafeSheetNames([
+        { name: "Sales/2026:Q1*?" },
+        { name: "'Very long worksheet name that exceeds thirty one characters'" },
+        { name: "Sales 2026 Q1" },
+        { name: "'[]:*?/\\'" },
+        { name: "History" }
+      ])
+    ).toEqual(["Sales 2026 Q1", "Very long worksheet name that e", "Sales 2026 Q1 (2)", "Лист 4", "History 1"]);
+
+    const blob = await exportXlsxBlob({
+      id: "book-1",
+      title: "Safe sheet names.xlsx",
+      updatedAt: "2026-06-01T00:00:00.000Z",
+      activeSheet: "sheet-1",
+      sheets: [
+        { id: "sheet-1", name: "Sales/2026:Q1*?", printArea: "A1:B2", cells: { A1: "Sales" } },
+        { id: "sheet-2", name: "Sales 2026 Q1", cells: { A1: "Duplicate" } }
+      ]
+    });
+    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], "Safe sheet names.xlsx", { type: blob.type }));
+
+    expect(workbookXml).toContain('<sheet name="Sales 2026 Q1" sheetId="1" r:id="rId1"/>');
+    expect(workbookXml).toContain('<sheet name="Sales 2026 Q1 (2)" sheetId="2" r:id="rId2"/>');
+    expect(workbookXml).toContain('<definedName name="_xlnm.Print_Area" localSheetId="0">\'Sales 2026 Q1\'!$A$1:$B$2</definedName>');
+    expect(imported.sheets.map((sheet) => sheet.name)).toEqual(["Sales 2026 Q1", "Sales 2026 Q1 (2)"]);
+    expect(imported.sheets[0].printArea).toBe("A1:B2");
+  });
+
   it("сохраняет и импортирует область печати XLSX через definedName _xlnm.Print_Area", async () => {
     expect(
       workbookPrintAreas(
@@ -673,6 +742,45 @@ describe("excellOffice OOXML helpers", () => {
     expect(imported.sheets[1].printArea).toBe("B2:C4,E1:E3");
   });
 
+  it("сохраняет и импортирует параметры страницы XLSX через pageMargins и pageSetup", async () => {
+    expect(
+      worksheetXmlToPageSetup({
+        worksheet: {
+          pageMargins: { left: "0.25", right: "0.25", top: "0.75", bottom: "0.75", header: "0.3", footer: "0.3" },
+          pageSetup: { paperSize: "1", orientation: "landscape" }
+        }
+      })
+    ).toEqual({ size: "letter", orientation: "landscape", marginPreset: "narrow" });
+    expect(buildPageMarginsXml({ size: "a4", orientation: "portrait", marginPreset: "wide" })).toBe(
+      '<pageMargins left="1" right="1" top="1" bottom="1" header="0.5" footer="0.5"/>'
+    );
+    expect(buildPageSetupXml({ size: "letter", orientation: "landscape", marginPreset: "normal" })).toBe(
+      '<pageSetup paperSize="1" orientation="landscape"/>'
+    );
+
+    const blob = await exportXlsxBlob({
+      id: "book-1",
+      title: "Page setup.xlsx",
+      updatedAt: "2026-06-01T00:00:00.000Z",
+      activeSheet: "sheet-1",
+      sheets: [
+        {
+          id: "sheet-1",
+          name: "Layout",
+          pageSetup: { size: "letter", orientation: "landscape", marginPreset: "narrow" },
+          cells: { A1: "Layout" }
+        }
+      ]
+    });
+    const zip = await JSZip.loadAsync(await blob.arrayBuffer());
+    const sheetXml = (await zip.file("xl/worksheets/sheet1.xml")?.async("string")) ?? "";
+    const imported = await importXlsxFile(new File([blob], "Page setup.xlsx", { type: blob.type }));
+
+    expect(sheetXml).toContain('<pageMargins left="0.25" right="0.25" top="0.75" bottom="0.75" header="0.3" footer="0.3"/>');
+    expect(sheetXml).toContain('<pageSetup paperSize="1" orientation="landscape"/>');
+    expect(imported.sheets[0].pageSetup).toEqual({ size: "letter", orientation: "landscape", marginPreset: "narrow" });
+  });
+
   it("сохраняет и импортирует скрытые листы XLSX через sheet state", async () => {
     const blob = await exportXlsxBlob({
       id: "book-1",

src/io/excellOffice.ts

@@ -1,4 +1,15 @@
-import type { CellFormat, MergedCellRange, SheetChart, SheetChartType, SheetFrozenPane, Workbook } from "../types";
+import type {
+  CellFormat,
+  MergedCellRange,
+  SheetChart,
+  SheetChartType,
+  SheetFrozenPane,
+  SheetPageMarginPreset,
+  SheetPageOrientation,
+  SheetPageSetup,
+  SheetPageSizeId,
+  Workbook
+} from "../types";
 import { evaluateCell, expandRange } from "../utils/spreadsheet";
 import { officeTitleFromFileName, readOfficeFileAsArrayBuffer, XLSX_MIME_TYPE } from "./fileHelpers";
 
@@ -19,6 +30,7 @@ export interface ImportedExcellWorkbook {
     showGridLines?: boolean;
     zoomScale?: number;
     printArea?: string;
+    pageSetup?: SheetPageSetup;
     cells: Record<string, string>;
     mergedCells?: MergedCellRange[];
     hyperlinks?: Record<string, string>;
@@ -77,6 +89,7 @@ interface ParsedSheet {
   showGridLines?: boolean;
   zoomScale?: number;
   printArea?: string;
+  pageSetup?: SheetPageSetup;
   cells: Record<string, string>;
   mergedCells?: MergedCellRange[];
   hyperlinks?: Record<string, string>;
@@ -210,6 +223,16 @@ const builtinNumberFormats: Record<number, string> = {
   48: "##0.0E+0",
   49: "@"
 };
+const defaultSheetPageSetup: SheetPageSetup = { size: "a4", orientation: "portrait", marginPreset: "normal" };
+const xlsxPageSizePaperIds: Record<SheetPageSizeId, number> = {
+  letter: 1,
+  a4: 9
+};
+const xlsxPageMargins: Record<SheetPageMarginPreset, { left: number; right: number; top: number; bottom: number; header: number; footer: number }> = {
+  normal: { left: 0.7, right: 0.7, top: 0.75, bottom: 0.75, header: 0.3, footer: 0.3 },
+  narrow: { left: 0.25, right: 0.25, top: 0.75, bottom: 0.75, header: 0.3, footer: 0.3 },
+  wide: { left: 1, right: 1, top: 1, bottom: 1, header: 0.5, footer: 0.5 }
+};
 
 export async function importXlsxFile(file: File): Promise<ImportedExcellWorkbook> {
   if (!file.name.toLowerCase().endsWith(".xlsx")) {
@@ -226,6 +249,7 @@ export async function importXlsxFile(file: File): Promise<ImportedExcellWorkbook
   const themeColors = await readOptionalWorkbookThemeColors(zip, parser);
   const styleTable = xlsxStylesXmlToCellFormatTable(await readOptionalWorkbookStyles(zip, parser), themeColors);
   const sheetRefs = workbookSheetRefs(workbookXml);
+  const date1904 = workbookUsesDate1904(workbookXml);
   const printAreas = workbookPrintAreas(workbookXml, sheetRefs);
   const relationshipTargets = workbookRelationshipTargets(relationshipsXml);
   const sheets = await Promise.all(
@@ -249,7 +273,7 @@ export async function importXlsxFile(file: File): Promise<ImportedExcellWorkbook
       const sheetRelationshipsXml = await readOptionalSheetRelationships(zip, parser, sheetPath);
       const commentsPath = worksheetCommentsPath(sheetRelationshipsXml, sheetPath);
       const commentsXml = commentsPath ? await readOptionalParsedXml(zip, parser, commentsPath) : undefined;
-      const parsedSheet = parsedWorksheetToSheet(sheetXml, sheet, index, sharedStrings, sheetRelationshipsXml, styleTable, themeColors, commentsXml);
+      const parsedSheet = parsedWorksheetToSheet(sheetXml, sheet, index, sharedStrings, sheetRelationshipsXml, styleTable, themeColors, commentsXml, date1904);
       const charts = await worksheetXmlToCharts(zip, parser, sheetXml, sheetRelationshipsXml, sheetPath, parsedSheet.name);
       return { ...parsedSheet, ...(printAreas[sheet.id] ? { printArea: printAreas[sheet.id] } : {}), charts };
     })
@@ -267,11 +291,13 @@ export async function exportXlsxBlob(workbook: Workbook): Promise<Blob> {
   const JSZip = await loadJsZip();
   const zip = new JSZip();
   const sheets = workbook.sheets.length > 0 ? workbook.sheets : [{ id: "sheet-1", name: "Лист 1", cells: {}, mergedCells: [], hyperlinks: {} }];
+  const safeSheetNames = xlsxSafeSheetNames(sheets);
+  const safeSheets = sheets.map((sheet, index) => ({ ...sheet, name: safeSheetNames[index] }));
 
-  const styleRegistry = createCellStyleRegistry(sheets.map((sheet) => sheet.cellFormats));
+  const styleRegistry = createCellStyleRegistry(safeSheets.map((sheet) => sheet.cellFormats));
-  const chartParts = chartPartRefsForSheets(sheets);
+  const chartParts = chartPartRefsForSheets(safeSheets);
-  const commentParts = commentPartRefsForSheets(sheets);
+  const commentParts = commentPartRefsForSheets(safeSheets);
-  const activeSheetIndex = Math.max(0, sheets.findIndex((sheet) => sheet.id === workbook.activeSheet));
+  const activeSheetIndex = Math.max(0, safeSheets.findIndex((sheet) => sheet.id === workbook.activeSheet));
 
   zip.file("[Content_Types].xml", buildContentTypesXml(sheets.length, chartParts, commentParts));
   zip.file("_rels/.rels", buildRootRelationshipsXml());
@@ -280,8 +306,8 @@ export async function exportXlsxBlob(workbook: Workbook): Promise<Blob> {
   zip.file(
     "xl/workbook.xml",
     buildWorkbookXml(
-      sheets.map((sheet, index) => ({
+      safeSheets.map((sheet) => ({
-        name: sheet.name.trim() || `Лист ${index + 1}`,
+        name: sheet.name,
         ...(sheet.visibility ? { visibility: sheet.visibility } : {}),
         ...(sheet.printArea ? { printArea: sheet.printArea } : {})
       })),
@@ -291,7 +317,7 @@ export async function exportXlsxBlob(workbook: Workbook): Promise<Blob> {
   zip.file("xl/_rels/workbook.xml.rels", buildWorkbookRelationshipsXml(sheets.length));
   zip.file("xl/styles.xml", buildStylesXml(styleRegistry));
 
-  sheets.forEach((sheet, index) => {
+  safeSheets.forEach((sheet, index) => {
     const sheetChartParts = chartParts.filter((part) => part.sheetIndex === index);
     const sheetCommentPart = commentParts.find((part) => part.sheetIndex === index);
     const externalHyperlinkCount = sortedExternalHyperlinkEntries(sheet.hyperlinks).length;
@@ -317,7 +343,8 @@ export async function exportXlsxBlob(workbook: Workbook): Promise<Blob> {
         sheet.hiddenRows,
         sheet.showGridLines,
         sheet.zoomScale,
-        legacyDrawingRelationshipId
+        legacyDrawingRelationshipId,
+        sheet.pageSetup
       )
     );
     const relationshipsXml = buildWorksheetRelationshipsXml(
@@ -356,7 +383,8 @@ export function parsedWorksheetToSheet(
   relationshipsXml?: unknown,
   styleTable: Array<CellFormat | undefined> = [],
   themeColors: string[] = defaultXlsxThemeColors,
-  commentsXml?: unknown
+  commentsXml?: unknown,
+  date1904 = false
 ): ParsedSheet {
   const frozenPane = worksheetXmlToFrozenPane(worksheetXml);
   const autoFilter = worksheetXmlToAutoFilter(worksheetXml);
@@ -367,6 +395,7 @@ export function parsedWorksheetToSheet(
   const hiddenRows = worksheetXmlToHiddenRows(worksheetXml);
   const showGridLines = worksheetXmlToShowGridLines(worksheetXml);
   const zoomScale = worksheetXmlToZoomScale(worksheetXml);
+  const pageSetup = worksheetXmlToPageSetup(worksheetXml);
 
   return {
     id: sheet.id || `sheet-${index + 1}`,
@@ -381,7 +410,8 @@ export function parsedWorksheetToSheet(
     ...(Object.keys(hiddenRows).length > 0 ? { hiddenRows } : {}),
     ...(showGridLines === false ? { showGridLines } : {}),
     ...(zoomScale ? { zoomScale } : {}),
-    cells: worksheetXmlToCells(worksheetXml, sharedStrings),
+    ...(pageSetup ? { pageSetup } : {}),
+    cells: worksheetXmlToCells(worksheetXml, sharedStrings, styleTable, date1904),
     mergedCells: worksheetXmlToMergedCells(worksheetXml),
     hyperlinks: worksheetXmlToHyperlinks(worksheetXml, relationshipsXml),
     comments: worksheetCommentsXmlToComments(commentsXml),
@@ -390,7 +420,7 @@ export function parsedWorksheetToSheet(
   };
 }
 
-export function worksheetXmlToCells(worksheetXml: unknown, sharedStrings: string[]) {
+export function worksheetXmlToCells(worksheetXml: unknown, sharedStrings: string[], styleTable: Array<CellFormat | undefined> = [], date1904 = false) {
   const cells: Record<string, string> = {};
   const sharedFormulas: SharedFormulaMap = {};
   const parsedCells = worksheetCellRecords(worksheetXml);
@@ -406,9 +436,10 @@ export function worksheetXmlToCells(worksheetXml: unknown, sharedStrings: string
 
   parsedCells.forEach(({ address, cell }) => {
     const text = xlsxCellToText(cell, sharedStrings, sharedFormulas, address);
+    const importedText = date1904 ? date1904AdjustedCellText(cell, text, styleTable[numberAttribute(cell.s)]) : text;
 
-    if (text !== "") {
+    if (importedText !== "") {
-      cells[address] = text;
+      cells[address] = importedText;
     }
   });
 
@@ -535,6 +566,18 @@ export function worksheetXmlToZoomScale(worksheetXml: unknown) {
   return normalizedSheetZoomScale(sheetView.zoomScale);
 }
 
+export function worksheetXmlToPageSetup(worksheetXml: unknown): SheetPageSetup | undefined {
+  const worksheet = childRecord(worksheetXml, "worksheet");
+  const pageSetup = childRecord(worksheet, "pageSetup");
+  const pageMargins = childRecord(worksheet, "pageMargins");
+  const size = sheetPageSizeFromPaperId(pageSetup.paperSize) ?? defaultSheetPageSetup.size;
+  const orientation = normalizedSheetPageOrientation(pageSetup.orientation) ?? defaultSheetPageSetup.orientation;
+  const marginPreset = sheetPageMarginPresetFromRecord(pageMargins) ?? defaultSheetPageSetup.marginPreset;
+  const hasPageSetup = Object.keys(pageSetup).length > 0;
+  const hasPageMargins = Object.keys(pageMargins).length > 0;
+  return hasPageSetup || hasPageMargins ? { size, orientation, marginPreset } : undefined;
+}
+
 export function worksheetXmlToAutoFilter(worksheetXml: unknown) {
   const worksheet = childRecord(worksheetXml, "worksheet");
   const autoFilter = childRecord(worksheet, "autoFilter");
@@ -799,7 +842,8 @@ export function buildWorksheetXml(
   hiddenRows: Record<string, boolean> = {},
   showGridLines?: boolean,
   zoomScale?: number,
-  legacyDrawingRelationshipId = ""
+  legacyDrawingRelationshipId = "",
+  pageSetup?: SheetPageSetup
 ) {
   const normalizedRowHeights = normalizedSheetRowHeights(rowHeights);
   const normalizedHiddenRows = normalizedSheetHiddenRows(hiddenRows);
@@ -840,9 +884,11 @@ export function buildWorksheetXml(
   const sheetPrXml = buildSheetPrXml(tabColor);
   const sheetViewsXml = buildSheetViewsXml(frozenPane, showGridLines, zoomScale);
   const colsXml = buildColumnWidthsXml(columnWidths, hiddenColumns);
+  const pageMarginsXml = buildPageMarginsXml(pageSetup);
+  const pageSetupXml = buildPageSetupXml(pageSetup);
 
   return xmlDeclaration(
-    `<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">${sheetPrXml}${sheetViewsXml}${colsXml}<sheetData>${rowXml}</sheetData>${autoFilterXml}${mergeCellsXml}${hyperlinksXml}${drawingXml}${legacyDrawingXml}</worksheet>`
+    `<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">${sheetPrXml}${sheetViewsXml}${colsXml}<sheetData>${rowXml}</sheetData>${autoFilterXml}${mergeCellsXml}${hyperlinksXml}${pageMarginsXml}${pageSetupXml}${drawingXml}${legacyDrawingXml}</worksheet>`
   );
 }
 
@@ -935,6 +981,24 @@ export function buildSheetPrXml(tabColor?: string) {
   return color ? `<sheetPr><tabColor rgb="FF${color}"/></sheetPr>` : "";
 }
 
+export function buildPageMarginsXml(pageSetup?: SheetPageSetup) {
+  if (!pageSetup) {
+    return "";
+  }
+
+  const margins = xlsxPageMargins[normalizedSheetPageSetup(pageSetup).marginPreset];
+  return `<pageMargins left="${formatSheetDimension(margins.left)}" right="${formatSheetDimension(margins.right)}" top="${formatSheetDimension(margins.top)}" bottom="${formatSheetDimension(margins.bottom)}" header="${formatSheetDimension(margins.header)}" footer="${formatSheetDimension(margins.footer)}"/>`;
+}
+
+export function buildPageSetupXml(pageSetup?: SheetPageSetup) {
+  if (!pageSetup) {
+    return "";
+  }
+
+  const normalized = normalizedSheetPageSetup(pageSetup);
+  return `<pageSetup paperSize="${xlsxPageSizePaperIds[normalized.size]}" orientation="${normalized.orientation}"/>`;
+}
+
 export function buildColumnWidthsXml(columnWidths: Record<string, number> = {}, hiddenColumns: Record<string, boolean> = {}) {
   const columnsByNumber = new Map<number, { width?: number; hidden?: boolean }>();
   normalizedSheetColumnWidths(columnWidths).forEach(({ column, width }) => {
@@ -1030,6 +1094,12 @@ export function workbookActiveSheetId(workbookXml: unknown, sheets: Array<{ id:
   return sheets[activeTab]?.id ?? "";
 }
 
+export function workbookUsesDate1904(workbookXml: unknown) {
+  const workbook = childRecord(workbookXml, "workbook");
+  const workbookPr = childRecord(workbook, "workbookPr");
+  return booleanAttribute(workbookPr.date1904 ?? workbookPr["@_date1904"]);
+}
+
 export function workbookPrintAreas(workbookXml: unknown, sheets: Array<{ id: string; name: string }>): Record<string, string> {
   const workbook = childRecord(workbookXml, "workbook");
   const definedNames = childRecord(workbook, "definedNames");
@@ -1109,6 +1179,45 @@ function buildRootRelationshipsXml() {
   );
 }
 
+export function xlsxSafeSheetNames(sheets: Array<{ name: string }>) {
+  const usedNames = new Set<string>();
+  return sheets.map((sheet, index) => uniqueXlsxSheetName(sheet.name, index, usedNames));
+}
+
+function uniqueXlsxSheetName(value: string, index: number, usedNames: Set<string>) {
+  const fallback = `Лист ${index + 1}`;
+  const normalizedName = normalizedXlsxSheetName(value);
+  const baseName = xlsxReservedSheetName(normalizedName) ? `${normalizedName} 1` : normalizedName || fallback;
+  let suffixNumber = 1;
+  let candidate = truncateXlsxSheetName(baseName);
+
+  while (usedNames.has(candidate.toLowerCase())) {
+    suffixNumber += 1;
+    const suffix = ` (${suffixNumber})`;
+    candidate = `${truncateXlsxSheetName(baseName, 31 - suffix.length)}${suffix}`;
+  }
+
+  usedNames.add(candidate.toLowerCase());
+  return candidate;
+}
+
+function normalizedXlsxSheetName(value: string) {
+  return value
+    .replace(/[\u0000-\u001f\\/?*:[\]]+/g, " ")
+    .replace(/\s+/g, " ")
+    .trim()
+    .replace(/^'+|'+$/g, "")
+    .trim();
+}
+
+function xlsxReservedSheetName(value: string) {
+  return value.trim().toLowerCase() === "history";
+}
+
+function truncateXlsxSheetName(value: string, maxLength = 31) {
+  return Array.from(value).slice(0, Math.max(1, maxLength)).join("");
+}
+
 function buildWorkbookXml(sheets: Array<{ name: string; visibility?: WorkbookSheetRef["visibility"]; printArea?: string }>, activeSheetIndex = 0) {
   const activeTab = Math.min(Math.max(0, activeSheetIndex), Math.max(0, sheets.length - 1));
   const bookViews = `<bookViews><workbookView activeTab="${activeTab}"/></bookViews>`;
@@ -1748,6 +1857,37 @@ function normalizedNumberFormat(value?: string) {
   return raw.slice(0, 255);
 }
 
+function date1904AdjustedCellText(cell: XmlRecord, text: string, format?: CellFormat) {
+  if (!isNumericXlsxCell(cell) || !isDateSerialXlsxNumberFormat(format?.numberFormat)) {
+    return text;
+  }
+
+  const serial = Number(text);
+  if (!Number.isFinite(serial) || serial < 0) {
+    return text;
+  }
+
+  return normalizedXlsxNumberText(serial + 1462);
+}
+
+function isNumericXlsxCell(cell: XmlRecord) {
+  const type = typeof cell.t === "string" ? cell.t.trim() : "";
+  return type === "" || type === "n";
+}
+
+function isDateSerialXlsxNumberFormat(value?: string) {
+  const pattern = normalizedNumberFormat(value)
+    .replace(/"[^"]*"/g, "")
+    .replace(/\\./g, "")
+    .replace(/\[[^\]]+]/g, "")
+    .toLowerCase();
+  return /[dy]/.test(pattern) || (pattern.includes("m") && !/[hs]/.test(pattern));
+}
+
+function normalizedXlsxNumberText(value: number) {
+  return Number.isInteger(value) ? String(value) : String(Number(value.toFixed(10)));
+}
+
 function xlsxNumberFormats(styleSheet: XmlRecord) {
   const formats = { ...builtinNumberFormats };
   toArray(childRecord(styleSheet, "numFmts").numFmt).forEach((numFmt) => {
@@ -1833,6 +1973,58 @@ function normalizedSheetZoomScale(value: unknown) {
   return zoomScale >= 10 && zoomScale <= 400 && zoomScale !== 100 ? zoomScale : 0;
 }
 
+function normalizedSheetPageSetup(pageSetup?: SheetPageSetup): SheetPageSetup {
+  const size = isSheetPageSizeId(pageSetup?.size) ? pageSetup.size : defaultSheetPageSetup.size;
+  const orientation = normalizedSheetPageOrientation(pageSetup?.orientation) ?? defaultSheetPageSetup.orientation;
+  const marginPreset = isSheetPageMarginPreset(pageSetup?.marginPreset) ? pageSetup.marginPreset : defaultSheetPageSetup.marginPreset;
+  return { size, orientation, marginPreset };
+}
+
+function normalizedSheetPageOrientation(value: unknown): SheetPageOrientation | undefined {
+  return value === "portrait" || value === "landscape" ? value : undefined;
+}
+
+function isSheetPageSizeId(value: unknown): value is SheetPageSizeId {
+  return value === "a4" || value === "letter";
+}
+
+function isSheetPageMarginPreset(value: unknown): value is SheetPageMarginPreset {
+  return value === "normal" || value === "narrow" || value === "wide";
+}
+
+function sheetPageSizeFromPaperId(value: unknown): SheetPageSizeId | undefined {
+  const paperSize = positiveIntegerAttribute(value);
+  return (Object.keys(xlsxPageSizePaperIds) as SheetPageSizeId[]).find((sizeId) => xlsxPageSizePaperIds[sizeId] === paperSize);
+}
+
+function sheetPageMarginPresetFromRecord(record: XmlRecord): SheetPageMarginPreset | undefined {
+  const left = positiveNumberAttribute(record.left);
+  const right = positiveNumberAttribute(record.right);
+  const top = positiveNumberAttribute(record.top);
+  const bottom = positiveNumberAttribute(record.bottom);
+  const header = positiveNumberAttribute(record.header);
+  const footer = positiveNumberAttribute(record.footer);
+  if (!left || !right || !top || !bottom || !header || !footer) {
+    return undefined;
+  }
+
+  return (Object.keys(xlsxPageMargins) as SheetPageMarginPreset[]).find((preset) => {
+    const margins = xlsxPageMargins[preset];
+    return (
+      isCloseDimension(left, margins.left) &&
+      isCloseDimension(right, margins.right) &&
+      isCloseDimension(top, margins.top) &&
+      isCloseDimension(bottom, margins.bottom) &&
+      isCloseDimension(header, margins.header) &&
+      isCloseDimension(footer, margins.footer)
+    );
+  });
+}
+
+function isCloseDimension(actual: number, expected: number) {
+  return Math.abs(actual - expected) <= 0.01;
+}
+
 function buildRowAttributes(height?: number, hidden?: boolean) {
   return `${height ? ` ht="${formatSheetDimension(height)}" customHeight="1"` : ""}${hidden ? ' hidden="1"' : ""}`;
 }

src/io/powerPointOffice.test.ts

@@ -7,6 +7,7 @@ import {
   listSlidePaths,
   normalizeWhitespace,
   presentationSlidePaths,
+  presentationSlideSize,
   relationshipTargetByType,
   resolvePptTarget
 } from "./powerPointOffice";
@@ -81,6 +82,30 @@ describe("powerPointOffice helpers", () => {
     ]);
   });
 
+  it("читает размер слайда из presentation.xml", () => {
+    expect(
+      presentationSlideSize({
+        presentation: {
+          sldSz: { cx: "12192000", cy: "6858000" }
+        }
+      })
+    ).toBe("wide");
+    expect(
+      presentationSlideSize({
+        presentation: {
+          sldSz: { "@_cx": "9144000", "@_cy": "6858000" }
+        }
+      })
+    ).toBe("standard");
+    expect(
+      presentationSlideSize({
+        presentation: {
+          sldSz: { cx: "9144000", cy: "5143500" }
+        }
+      })
+    ).toBeUndefined();
+  });
+
   it("разрешает относительные targets заметок от части слайда", () => {
     expect(resolvePptTarget("ppt/slides", "../notesSlides/notesSlide7.xml")).toBe("ppt/notesSlides/notesSlide7.xml");
     expect(
@@ -104,7 +129,7 @@ describe("powerPointOffice helpers", () => {
     const zip = new JSZip();
     zip.file(
       "ppt/presentation.xml",
-      `<p:presentation xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><p:sldIdLst><p:sldId id="256" r:id="rId2"/><p:sldId id="255" r:id="rId1"/></p:sldIdLst></p:presentation>`
+      `<p:presentation xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><p:sldSz cx="9144000" cy="6858000"/><p:sldIdLst><p:sldId id="256" r:id="rId2"/><p:sldId id="255" r:id="rId1"/></p:sldIdLst></p:presentation>`
     );
     zip.file(
       "ppt/_rels/presentation.xml.rels",
@@ -125,6 +150,7 @@ describe("powerPointOffice helpers", () => {
     const imported = await importPptxFile(new File([blob], "Дорожная карта.pptx", { type: blob.type }));
 
     expect(imported.slides.map((slide) => slide.title)).toEqual(["Первый по порядку", "Первый файл"]);
+    expect(imported.slideSize).toBe("standard");
     expect(imported.slides[0].subtitle).toBe("Содержимое первого слайда");
     expect(imported.slides[0].notes).toBe("Заметка докладчика");
   });
@@ -772,6 +798,28 @@ describe("powerPointOffice helpers", () => {
     });
   });
 
+  it("экспортирует и переимпортирует стандартный размер слайда PPTX 4:3", async () => {
+    const blob = await exportPptxBlob({
+      title: "Standard.pptx",
+      slideSize: "standard",
+      slides: [
+        {
+          id: "slide-1",
+          title: "Standard",
+          subtitle: "4:3",
+          notes: "",
+          theme: "classic"
+        }
+      ]
+    });
+    const zip = await JSZip.loadAsync(await blob.arrayBuffer());
+    const presentationXml = (await zip.file("ppt/presentation.xml")?.async("string")) ?? "";
+    const reimported = await importPptxFile(new File([blob], "Standard.pptx", { type: blob.type }));
+
+    expect(presentationXml).toContain('<p:sldSz cx="9144000" cy="6858000"/>');
+    expect(reimported.slideSize).toBe("standard");
+  });
+
   it("нормализует пробелы в импортированном тексте", () => {
     expect(normalizeWhitespace("  Строка\tс \n пробелами  ")).toBe("Строка с пробелами");
   });

src/io/powerPointOffice.ts

@@ -1,13 +1,15 @@
-import type { Slide, SlideImage, SlideListStyle, SlideTextAlign } from "../types";
+import type { Slide, SlideImage, SlideListStyle, SlideSizeId, SlideTextAlign } from "../types";
 import { officeTitleFromFileName, PPTX_MIME_TYPE, readOfficeFileAsArrayBuffer } from "./fileHelpers";
 
 export interface ImportedPowerPointDeck {
   title: string;
+  slideSize?: SlideSizeId;
   slides: Slide[];
 }
 
 export interface ExportablePowerPointDeck {
   title: string;
+  slideSize?: SlideSizeId;
   slides: Slide[];
 }
 
@@ -47,6 +49,10 @@ const imageRelationshipType = "http://schemas.openxmlformats.org/officeDocument/
 const hyperlinkRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink";
 const emuPerInch = 914400;
 const slideTransitions = ["fade", "push", "wipe"] as const;
+const slideSizeLayouts: Record<SlideSizeId, { width: number; height: number; cx: number; cy: number; pptxLayout: string }> = {
+  wide: { width: 13.333, height: 7.5, cx: 12192000, cy: 6858000, pptxLayout: "LAYOUT_WIDE" },
+  standard: { width: 10, height: 7.5, cx: 9144000, cy: 6858000, pptxLayout: "LAYOUT_4x3" }
+};
 const themeColors: Record<Slide["theme"], { background: string; title: string; subtitle: string }> = {
   classic: { background: "FFFFFF", title: "202124", subtitle: "3C4043" },
   ocean: { background: "EAF6FF", title: "075985", subtitle: "0F766E" },
@@ -65,6 +71,7 @@ export async function importPptxFile(file: File): Promise<ImportedPowerPointDeck
   const presentationXml = await readOptionalParsedXml(zip, parser, "ppt/presentation.xml");
   const presentationRelationshipsXml = await readOptionalParsedXml(zip, parser, "ppt/_rels/presentation.xml.rels");
   const slidePaths = listSlidePaths(zip, presentationXml, presentationRelationshipsXml);
+  const slideSize = presentationSlideSize(presentationXml);
 
   if (slidePaths.length === 0) {
     throw new Error("В файле PowerPoint не найдены слайды.");
@@ -126,7 +133,7 @@ export async function importPptxFile(file: File): Promise<ImportedPowerPointDeck
     })
   );
 
-  return { title, slides };
+  return { title, ...(slideSize ? { slideSize } : {}), slides };
 }
 
 export async function exportPptxBlob(deck: ExportablePowerPointDeck): Promise<Blob> {
@@ -147,8 +154,10 @@ export async function exportPptxBlob(deck: ExportablePowerPointDeck): Promise<Bl
     };
     write: (options: { outputType: "blob" | "arraybuffer" }) => Promise<Blob | ArrayBuffer>;
   };
+  const slideSize = normalizedSlideSizeId(deck.slideSize);
+  const slideLayout = slideSizeLayouts[slideSize];
 
-  pptx.layout = "LAYOUT_WIDE";
+  pptx.layout = slideLayout.pptxLayout;
   pptx.author = "QOffice";
   pptx.company = "QOffice";
   pptx.subject = "Экспорт QPowerPoint";
@@ -196,7 +205,7 @@ export async function exportPptxBlob(deck: ExportablePowerPointDeck): Promise<Bl
     slide.addText(sourceSlide.title || "Без заголовка", {
       x: 0.7,
       y: 0.65,
-      w: 11.9,
+      w: Math.max(1, slideLayout.width - 1.4),
       h: 0.75,
       fontFace: titleFontFamily,
       fontSize: titleFontSize,
@@ -213,8 +222,8 @@ export async function exportPptxBlob(deck: ExportablePowerPointDeck): Promise<Bl
     slide.addText(sourceSlide.subtitle || "", {
       x: 0.75,
       y: 1.65,
-      w: 11.5,
+      w: Math.max(1, slideLayout.width - 1.5),
-      h: 4.35,
+      h: Math.max(1, slideLayout.height - 3.15),
       fontFace: subtitleFontFamily,
       fontSize: subtitleFontSize,
       ...(subtitleAlign ? { align: subtitleAlign } : {}),
@@ -411,6 +420,19 @@ export function presentationSlidePaths(presentationXml: unknown, presentationRel
   return slideIds.map((id) => relationshipTargets[id]).filter((target): target is string => Boolean(target));
 }
 
+export function presentationSlideSize(presentationXml: unknown): SlideSizeId | undefined {
+  const slideSize = childRecord(childRecord(presentationXml, "presentation"), "sldSz");
+  const cx = numberAttribute(slideSize, "cx");
+  const cy = numberAttribute(slideSize, "cy");
+  if (!cx || !cy) {
+    return undefined;
+  }
+
+  return Object.entries(slideSizeLayouts).find(([, layout]) => Math.abs(cx - layout.cx) <= 5000 && Math.abs(cy - layout.cy) <= 5000)?.[0] as
+    | SlideSizeId
+    | undefined;
+}
+
 export function relationshipTargetsById(relationshipsXml: unknown, type?: string, sourcePartPath = "ppt/presentation.xml"): Record<string, string> {
   const relationships = childRecord(relationshipsXml, "Relationships");
   const targets: Record<string, string> = {};
@@ -467,6 +489,10 @@ export function normalizeWhitespace(value: string): string {
   return value.replace(/\s+/g, " ").trim();
 }
 
+function normalizedSlideSizeId(value?: SlideSizeId): SlideSizeId {
+  return value === "standard" ? "standard" : "wide";
+}
+
 function normalizeTextWithLineBreaks(value: string): string {
   return value
     .split("\n")

src/io/wordOffice.test.ts

@@ -279,6 +279,17 @@ describe("wordOffice helpers", () => {
     expect(documentXml).toContain('<w:jc w:val="right"/>');
   });
 
+  it("writes QWord page setup to exported DOCX section properties", async () => {
+    const blob = await exportDocxBlob("Макет.docx", "<p>Landscape letter</p>", {
+      pageSetup: { size: "letter", orientation: "landscape", marginPreset: "narrow" }
+    });
+    const zip = await JSZip.loadAsync(await blob.arrayBuffer());
+    const documentXml = await zip.file("word/document.xml")?.async("string");
+
+    expect(documentXml).toMatch(/<w:pgSz\b[^>]*w:w="15840"[^>]*w:h="12240"[^>]*w:orient="landscape"[^>]*\/>/);
+    expect(documentXml).toMatch(/<w:pgMar\b[^>]*w:top="720"[^>]*w:right="720"[^>]*w:bottom="720"[^>]*w:left="720"[^>]*\/>/);
+  });
+
   it("записывает внешние гиперссылки в DOCX relationships", async () => {
     const blob = await exportDocxBlob(
       "Ссылки.docx",
@@ -349,6 +360,22 @@ describe("wordOffice helpers", () => {
     ]);
   });
 
+  it("preserves HTML table colspan as DOCX gridSpan", async () => {
+    const html = '<table><tr><td colspan="2">Merged</td><td>Tail</td></tr></table>';
+    const blocks = htmlToWordBlocks(html);
+    const blob = await exportDocxBlob("Table colspan.docx", html);
+    const zip = await JSZip.loadAsync(await blob.arrayBuffer());
+    const documentXml = (await zip.file("word/document.xml")?.async("string")) ?? "";
+
+    expect(blocks).toEqual([
+      {
+        type: "table",
+        rows: [[{ text: "Merged", runs: [{ text: "Merged" }], colSpan: 2 }, "Tail"]]
+      }
+    ]);
+    expect(documentXml).toMatch(/<w:gridSpan\b[^>]*w:val="2"[^>]*\/>/);
+  });
+
   it("сохраняет пустые ячейки и строки таблицы для DOCX", async () => {
     const html = `
       <table>

src/io/wordOffice.ts

@@ -1,8 +1,10 @@
 import { DOCX_MIME_TYPE, officeTitleFromFileName, readOfficeFileAsArrayBuffer } from "./fileHelpers";
+import type { WordPageMarginPreset, WordPageOrientation, WordPageSetup, WordPageSizeId } from "../types";
 
 export interface ImportedWordDocument {
   title: string;
   html: string;
+  pageSetup?: WordPageSetup;
 }
 
 export interface WordInlineRun {
@@ -25,7 +27,7 @@ export interface WordListItem {
   runs: WordInlineRun[];
 }
 
-export type WordTableCell = string | { text: string; runs: WordInlineRun[] };
+export type WordTableCell = string | { text: string; runs: WordInlineRun[]; colSpan?: number };
 
 export interface WordImageBlock {
   type: "image";
@@ -116,6 +118,7 @@ type DocxModule = {
   Document: new (options: Record<string, unknown>) => unknown;
   HeadingLevel: Record<string, string>;
   LineRuleType?: Record<string, string>;
+  PageOrientation?: Record<string, string>;
   Packer: {
     toBlob?: (document: unknown) => Promise<Blob>;
     toBuffer?: (document: unknown) => Promise<ArrayBuffer | Uint8Array>;
@@ -165,6 +168,16 @@ const wordImageRelationshipType = "http://schemas.openxmlformats.org/officeDocum
 const emptyDocxRelationshipTargets = { hyperlinks: {}, images: {} };
 const pageBreakMarker = "\f";
 const pageBreakHtml = '<span data-qoffice-page-break="true"></span>';
+const defaultWordPageSetup: WordPageSetup = { size: "a4", orientation: "portrait", marginPreset: "normal" };
+const wordPageSizes: Record<WordPageSizeId, { width: number; height: number }> = {
+  a4: { width: 794, height: 1123 },
+  letter: { width: 816, height: 1056 }
+};
+const wordPageMargins: Record<WordPageMarginPreset, { top: number; right: number; bottom: number; left: number }> = {
+  normal: { top: 72, right: 86, bottom: 72, left: 86 },
+  narrow: { top: 48, right: 48, bottom: 48, left: 48 },
+  wide: { top: 92, right: 116, bottom: 92, left: 116 }
+};
 
 export async function importDocxFile(file: File): Promise<ImportedWordDocument> {
   if (!file.name.toLowerCase().endsWith(".docx")) {
@@ -173,7 +186,7 @@ export async function importDocxFile(file: File): Promise<ImportedWordDocument>
 
   const mammoth = await loadMammoth();
   const arrayBuffer = await readOfficeFileAsArrayBuffer(file);
-  const [result, styledHtml] = await Promise.all([
+  const [result, styledHtml, pageSetup] = await Promise.all([
     mammoth.convertToHtml(
       { arrayBuffer, buffer: arrayBuffer },
       {
@@ -181,20 +194,23 @@ export async function importDocxFile(file: File): Promise<ImportedWordDocument>
         ...(mammoth.images?.dataUri ? { convertImage: mammoth.images.dataUri } : {})
       }
     ),
-    styledDocxHtmlFromArrayBuffer(arrayBuffer)
+    styledDocxHtmlFromArrayBuffer(arrayBuffer),
+    docxPageSetupFromArrayBuffer(arrayBuffer)
   ]);
 
   return {
     title: officeTitleFromFileName(file.name, "Документ QWord.docx"),
-    html: normalizeImportedDocxHtml(styledHtml || result.value)
+    html: normalizeImportedDocxHtml(styledHtml || result.value),
+    ...(pageSetup ? { pageSetup } : {})
   };
 }
 
-export async function exportDocxBlob(title: string, html: string): Promise<Blob> {
+export async function exportDocxBlob(title: string, html: string, options: { pageSetup?: WordPageSetup } = {}): Promise<Blob> {
   const docx = await loadDocx();
   const blocks = htmlToWordBlocks(html);
   const children = blocks.flatMap((block) => wordBlockToDocxChildren(block, docx));
   const documentTitle = title.trim() || "Документ QWord";
+  const sectionProperties = wordSectionProperties(options.pageSetup, docx);
 
   const document = new docx.Document({
     creator: "QOffice",
@@ -221,7 +237,7 @@ export async function exportDocxBlob(title: string, html: string): Promise<Blob>
     },
     sections: [
       {
-        properties: {},
+        properties: sectionProperties,
         children:
           children.length > 0
             ? children
@@ -246,6 +262,62 @@ export async function exportDocxBlob(title: string, html: string): Promise<Blob>
   throw new Error("Не удалось создать DOCX: библиотека docx не вернула поддерживаемый упаковщик.");
 }
 
+function wordSectionProperties(pageSetup: WordPageSetup | undefined, docx: DocxModule) {
+  const normalizedPageSetup = normalizedWordPageSetup(pageSetup);
+  const size = wordPageSizeInTwips(normalizedPageSetup);
+  const margins = wordPageMargins[normalizedPageSetup.marginPreset];
+
+  return {
+    page: {
+      size: {
+        width: size.width,
+        height: size.height,
+        orientation:
+          normalizedPageSetup.orientation === "landscape"
+            ? (docx.PageOrientation?.LANDSCAPE ?? "landscape")
+            : (docx.PageOrientation?.PORTRAIT ?? "portrait")
+      },
+      margin: {
+        top: pxToTwips(margins.top),
+        right: pxToTwips(margins.right),
+        bottom: pxToTwips(margins.bottom),
+        left: pxToTwips(margins.left)
+      }
+    }
+  };
+}
+
+function normalizedWordPageSetup(pageSetup?: WordPageSetup): WordPageSetup {
+  const size = isWordPageSizeId(pageSetup?.size) ? pageSetup.size : defaultWordPageSetup.size;
+  const orientation = isWordPageOrientation(pageSetup?.orientation) ? pageSetup.orientation : defaultWordPageSetup.orientation;
+  const marginPreset = isWordPageMarginPreset(pageSetup?.marginPreset) ? pageSetup.marginPreset : defaultWordPageSetup.marginPreset;
+  return { size, orientation, marginPreset };
+}
+
+function wordPageSizeInTwips(pageSetup: WordPageSetup) {
+  const size = wordPageSizes[pageSetup.size];
+  return {
+    width: pxToTwips(size.width),
+    height: pxToTwips(size.height)
+  };
+}
+
+function pxToTwips(value: number) {
+  return Math.round(value * 15);
+}
+
+function isWordPageSizeId(value: unknown): value is WordPageSizeId {
+  return value === "a4" || value === "letter";
+}
+
+function isWordPageOrientation(value: unknown): value is WordPageOrientation {
+  return value === "portrait" || value === "landscape";
+}
+
+function isWordPageMarginPreset(value: unknown): value is WordPageMarginPreset {
+  return value === "normal" || value === "narrow" || value === "wide";
+}
+
 export function normalizeImportedDocxHtml(html: string) {
   return html.trim();
 }
@@ -406,9 +478,7 @@ function wordBlockToDocxChildren(block: WordBlock, docx: DocxModule) {
           new docx.TableRow({
             children: row.map(
               (cell) =>
-                new docx.TableCell({
+                new docx.TableCell(wordTableCellToDocxOptions(cell, docx))
-                  children: wordTableCellToDocxParagraphs(cell, docx)
-                })
             )
           })
       )
@@ -416,6 +486,14 @@ function wordBlockToDocxChildren(block: WordBlock, docx: DocxModule) {
   ];
 }
 
+function wordTableCellToDocxOptions(cell: WordTableCell, docx: DocxModule) {
+  const colSpan = typeof cell === "string" ? undefined : cell.colSpan;
+  return {
+    children: wordTableCellToDocxParagraphs(cell, docx),
+    ...(colSpan ? { columnSpan: colSpan } : {})
+  };
+}
+
 function wordTableCellToDocxParagraphs(cell: WordTableCell, docx: DocxModule) {
   const runs = typeof cell === "string" ? [{ text: cell }] : cell.runs;
   return [
@@ -662,7 +740,8 @@ function tableCellValue(cell: Element): WordTableCell {
   const runs = elementInlineRuns(cell);
   const text = inlineRunsText(runs);
   const hasFormattedRuns = runs.some((run) => Object.keys(cleanInlineFormat(run)).length > 0);
-  return hasFormattedRuns ? { text, runs } : text;
+  const colSpan = normalizedTableSpan(cell.getAttribute("colspan"));
+  return hasFormattedRuns || colSpan ? { text, runs, ...(colSpan ? { colSpan } : {}) } : text;
 }
 
 function paragraphElementToBlocks(element: Element, options: { quote?: boolean } = {}): WordBlock[] {
@@ -932,6 +1011,108 @@ async function styledDocxHtmlFromArrayBuffer(arrayBuffer: ArrayBuffer) {
   }
 }
 
+async function docxPageSetupFromArrayBuffer(arrayBuffer: ArrayBuffer): Promise<WordPageSetup | undefined> {
+  try {
+    const [JSZip, XMLParser] = await Promise.all([loadJsZip(), loadXmlParser()]);
+    const zip = await JSZip.loadAsync(arrayBuffer);
+    const documentXml = await zip.file("word/document.xml")?.async("string");
+    if (!documentXml) {
+      return undefined;
+    }
+
+    const parser = new XMLParser(xmlParserOptions);
+    return docxPageSetupFromDocumentXml(parser.parse(documentXml));
+  } catch {
+    return undefined;
+  }
+}
+
+function docxPageSetupFromDocumentXml(documentXml: unknown): WordPageSetup | undefined {
+  const body = childRecord(childRecord(documentXml, "w:document"), "w:body");
+  const sectionProperties = lastDocxSectionProperties(body);
+  if (!hasXmlRecord(sectionProperties)) {
+    return undefined;
+  }
+
+  return docxPageSetupFromSectionProperties(sectionProperties);
+}
+
+function lastDocxSectionProperties(body: XmlRecord): XmlRecord {
+  const paragraphSectionProperties = toArray(asRecord(body)["w:p"])
+    .map((paragraph) => childRecord(childRecord(paragraph, "w:pPr"), "w:sectPr"))
+    .filter(hasXmlRecord);
+  const bodySectionProperties = childRecord(body, "w:sectPr");
+  const sections = hasXmlRecord(bodySectionProperties) ? [...paragraphSectionProperties, bodySectionProperties] : paragraphSectionProperties;
+  return sections[sections.length - 1] ?? {};
+}
+
+function docxPageSetupFromSectionProperties(sectionProperties: XmlRecord): WordPageSetup | undefined {
+  const pageSize = childRecord(sectionProperties, "w:pgSz");
+  const pageMargins = childRecord(sectionProperties, "w:pgMar");
+  const width = docxTwipsAttribute(pageSize, ["w:w"]);
+  const height = docxTwipsAttribute(pageSize, ["w:h"]);
+  if (!width || !height) {
+    return undefined;
+  }
+
+  const orientation = docxPageOrientation(pageSize, width, height);
+  const baseWidth = orientation === "landscape" ? height : width;
+  const baseHeight = orientation === "landscape" ? width : height;
+  const size = wordPageSizeIdFromTwips(baseWidth, baseHeight);
+  if (!size) {
+    return undefined;
+  }
+
+  const marginPreset = hasXmlRecord(pageMargins) ? (wordPageMarginPresetFromTwips(pageMargins) ?? defaultWordPageSetup.marginPreset) : defaultWordPageSetup.marginPreset;
+  return { size, orientation, marginPreset };
+}
+
+function docxPageOrientation(pageSize: XmlRecord, width: number, height: number): WordPageOrientation {
+  const value = docxAttribute(pageSize, "w:orient").trim().toLowerCase();
+  if (value === "landscape") {
+    return "landscape";
+  }
+  if (value === "portrait") {
+    return "portrait";
+  }
+  return width > height ? "landscape" : "portrait";
+}
+
+function wordPageSizeIdFromTwips(width: number, height: number): WordPageSizeId | undefined {
+  return (Object.keys(wordPageSizes) as WordPageSizeId[]).find((sizeId) => {
+    const size = wordPageSizes[sizeId];
+    return isCloseTwips(width, pxToTwips(size.width)) && isCloseTwips(height, pxToTwips(size.height));
+  });
+}
+
+function wordPageMarginPresetFromTwips(pageMargins: XmlRecord): WordPageMarginPreset | undefined {
+  const top = docxTwipsAttribute(pageMargins, ["w:top"]);
+  const right = docxTwipsAttribute(pageMargins, ["w:right"]);
+  const bottom = docxTwipsAttribute(pageMargins, ["w:bottom"]);
+  const left = docxTwipsAttribute(pageMargins, ["w:left"]);
+  if (!top || !right || !bottom || !left) {
+    return undefined;
+  }
+
+  return (Object.keys(wordPageMargins) as WordPageMarginPreset[]).find((preset) => {
+    const margins = wordPageMargins[preset];
+    return (
+      isCloseTwips(top, pxToTwips(margins.top)) &&
+      isCloseTwips(right, pxToTwips(margins.right)) &&
+      isCloseTwips(bottom, pxToTwips(margins.bottom)) &&
+      isCloseTwips(left, pxToTwips(margins.left))
+    );
+  });
+}
+
+function isCloseTwips(actual: number, expected: number) {
+  return Math.abs(actual - expected) <= 40;
+}
+
+function hasXmlRecord(record: XmlRecord) {
+  return Object.keys(record).length > 0;
+}
+
 function isSimpleStyledDocxDocument(documentXml: string) {
   return !/<w:(pict|sdt)\b/i.test(documentXml);
 }
@@ -1122,7 +1303,9 @@ function orderedDocxTableToHtml(
             })
             .filter(Boolean);
           const content = paragraphs.length > 0 ? paragraphs.join("") : escapeHtml(orderedDocxCellText(cell));
-          return content ? `<td>${content}</td>` : "<td></td>";
+          const colSpan = orderedDocxTableCellColspan(cell);
+          const attributes = colSpan ? ` colspan="${colSpan}"` : "";
+          return content ? `<td${attributes}>${content}</td>` : `<td${attributes}></td>`;
         })
         .join("");
 
@@ -1133,6 +1316,12 @@ function orderedDocxTableToHtml(
   return { html: rows.length > 0 ? `<table><tbody>${rows.join("")}</tbody></table>` : "", hasImage, hasLineBreak, hasPageBreak, hasTab };
 }
 
+function orderedDocxTableCellColspan(cell: unknown) {
+  const properties = firstOrderedElement(orderedElementChildren(cell), "w:tcPr");
+  const gridSpan = firstOrderedElement(orderedElementChildren(properties), "w:gridSpan");
+  return normalizedTableSpan(docxAttribute(orderedElementAttributes(gridSpan), "w:val") || docxAttribute(orderedElementAttributes(gridSpan), "val"));
+}
+
 function orderedDocxCellText(cell: unknown) {
   return orderedDirectElements(cell, "w:p")
     .flatMap((paragraph) => orderedDocxParagraphInlineRecords(paragraph, {}))
@@ -1493,7 +1682,7 @@ function docxRunToHtml(run: unknown, imageDataByRelationshipId: DocxImageDataByR
     if (hasDocxBoolean(properties, "w:i")) {
       html = `<em>${html}</em>`;
     }
-    if (hasDocxBoolean(properties, "w:u")) {
+    if (hasDocxUnderline(properties)) {
       html = `<u>${html}</u>`;
     }
     if (hasStrike) {
@@ -1707,6 +1896,15 @@ function hasDocxBoolean(properties: XmlRecord, key: string) {
   return !["0", "false", "off"].includes(value.toLowerCase());
 }
 
+function hasDocxUnderline(properties: XmlRecord) {
+  if (!Object.prototype.hasOwnProperty.call(properties, "w:u")) {
+    return false;
+  }
+
+  const value = (docxAttribute(childRecord(properties, "w:u"), "w:val") || docxAttribute(childRecord(properties, "w:u"), "val")).trim().toLowerCase();
+  return !["0", "false", "off", "none"].includes(value);
+}
+
 function childRecord(value: unknown, key: string): XmlRecord {
   const child = asRecord(value)[key];
   if (Array.isArray(child)) {
@@ -1989,6 +2187,16 @@ function numericAttribute(element: Element, name: string) {
   return Number.isFinite(value) && value > 0 ? Math.round(value) : undefined;
 }
 
+function normalizedTableSpan(value?: string | null) {
+  const raw = value?.trim() ?? "";
+  if (!/^\d+$/.test(raw)) {
+    return undefined;
+  }
+
+  const span = Number.parseInt(raw, 10);
+  return Number.isSafeInteger(span) && span > 1 ? Math.min(span, 63) : undefined;
+}
+
 function cssPixelValue(style: string, property: "width" | "height") {
   const match = new RegExp(`${property}\\s*:\\s*(\\d+(?:\\.\\d+)?)px`, "i").exec(style);
   if (!match) {

src/io/wordOfficeImport.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it } from "vitest";
+import JSZip from "jszip";
 import { exportDocxBlob, htmlToWordBlocks, importDocxFile } from "./wordOffice";
 
 const tinyPngBase64 = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+/p9sAAAAASUVORK5CYII=";
@@ -128,6 +129,36 @@ describe("wordOffice DOCX import", () => {
     ]);
   });
 
+  it("does not import DOCX underline when w:u val is none", async () => {
+    const sourceBlob = await exportDocxBlob("UnderlineNone.docx", '<p><span style="color: #0f5fae;">Not underlined</span></p>');
+    const zip = await JSZip.loadAsync(await sourceBlob.arrayBuffer());
+    const documentXml = (await zip.file("word/document.xml")?.async("string")) ?? "";
+    const patchedDocumentXml = documentXml.replace(/(<w:rPr\b[^>]*>[\s\S]*?)(<\/w:rPr>)/, '$1<w:u w:val="none"/>$2');
+    expect(patchedDocumentXml).toContain('<w:u w:val="none"/>');
+    zip.file("word/document.xml", patchedDocumentXml);
+    const patchedBlob = await zip.generateAsync({
+      type: "blob",
+      mimeType: "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+    });
+
+    const imported = await importDocxFile(
+      new File([patchedBlob], "UnderlineNone.docx", {
+        type: "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+      })
+    );
+
+    expect(imported.html).not.toContain("<u>Not underlined</u>");
+    expect(imported.html).not.toContain("<u>");
+    expect(imported.html).toContain("color: #0F5FAE;");
+    expect(htmlToWordBlocks(imported.html)).toEqual([
+      {
+        type: "paragraph",
+        text: "Not underlined",
+        runs: [{ text: "Not underlined", color: "0F5FAE" }]
+      }
+    ]);
+  });
+
   it("imports DOCX subscript and superscript from OOXML", async () => {
     const blob = await exportDocxBlob("Indexes.docx", "<p>H<sub>2</sub>O m<sup>2</sup></p>");
     const file = new File([blob], "Indexes.docx", {
@@ -281,6 +312,25 @@ describe("wordOffice DOCX import", () => {
     ]);
   });
 
+  it("imports DOCX horizontal merged table cells as HTML colspan", async () => {
+    const blob = await exportDocxBlob(
+      "Table colspan.docx",
+      '<table><tr><td colspan="2">Merged</td><td>Tail</td></tr></table>'
+    );
+    const file = new File([blob], "Table colspan.docx", {
+      type: "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+    });
+    const imported = await importDocxFile(file);
+
+    expect(imported.html).toContain('<td colspan="2"><p>Merged</p></td>');
+    expect(htmlToWordBlocks(imported.html)).toEqual([
+      {
+        type: "table",
+        rows: [[{ text: "Merged", runs: [{ text: "Merged" }], colSpan: 2 }, "Tail"]]
+      }
+    ]);
+  });
+
   it("imports DOCX bullet and numbered lists from OOXML numbering", async () => {
     const blob = await exportDocxBlob(
       "Lists.docx",
@@ -399,4 +449,16 @@ describe("wordOffice DOCX import", () => {
       { type: "paragraph", text: "Exact line height", runs: [{ text: "Exact line height" }], spacing: { line: 480, lineRule: "exact" } }
     ]);
   });
+
+  it("imports DOCX page setup from OOXML section properties", async () => {
+    const blob = await exportDocxBlob("PageSetup.docx", "<p>Layout</p>", {
+      pageSetup: { size: "letter", orientation: "landscape", marginPreset: "narrow" }
+    });
+    const file = new File([blob], "PageSetup.docx", {
+      type: "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+    });
+    const imported = await importDocxFile(file);
+
+    expect(imported.pageSetup).toEqual({ size: "letter", orientation: "landscape", marginPreset: "narrow" });
+  });
 });

src/styles.css

@@ -516,6 +516,7 @@ button {
 
 .word-clipboard-group .word-ribbon-title,
 .word-font-group .word-ribbon-title,
+.word-page-setup-group .word-ribbon-title,
 .word-paragraph-group .word-ribbon-title,
 .word-styles-group .word-ribbon-title,
 .word-insert-group .word-ribbon-title,
@@ -621,6 +622,19 @@ button {
   grid-template-columns: minmax(0, 1fr);
 }
 
+.word-page-setup-group {
+  flex: 0 0 272px;
+  grid-template-columns: minmax(0, 1fr);
+}
+
+.word-page-setup-controls {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  align-content: start;
+  gap: 7px;
+  min-width: 0;
+}
+
 .word-paragraph-group > .segmented-tools,
 .word-paragraph-group > .compact-command {
   align-self: start;
@@ -1086,7 +1100,7 @@ button {
   z-index: 1;
   width: 100%;
   margin: 0;
-  padding: 72px 86px;
+  padding: var(--qword-page-margin-top, 72px) var(--qword-page-margin-right, 86px) var(--qword-page-margin-bottom, 72px) var(--qword-page-margin-left, 86px);
   border: 0;
   background: transparent;
   box-shadow: none;

src/types.ts

@@ -1,10 +1,30 @@
 export type AppId = "word" | "sheets" | "slides" | "mail";
 
+export type WordPageSizeId = "a4" | "letter";
+export type WordPageOrientation = "portrait" | "landscape";
+export type WordPageMarginPreset = "normal" | "narrow" | "wide";
+export type SheetPageSizeId = "a4" | "letter";
+export type SheetPageOrientation = "portrait" | "landscape";
+export type SheetPageMarginPreset = "normal" | "narrow" | "wide";
+
+export interface WordPageSetup {
+  size: WordPageSizeId;
+  orientation: WordPageOrientation;
+  marginPreset: WordPageMarginPreset;
+}
+
+export interface SheetPageSetup {
+  size: SheetPageSizeId;
+  orientation: SheetPageOrientation;
+  marginPreset: SheetPageMarginPreset;
+}
+
 export interface WordDocument {
   id: string;
   title: string;
   updatedAt: string;
   html: string;
+  pageSetup?: WordPageSetup;
 }
 
 export interface Workbook {
@@ -29,6 +49,7 @@ export interface Sheet {
   showGridLines?: boolean;
   zoomScale?: number;
   printArea?: string;
+  pageSetup?: SheetPageSetup;
   cells: Record<string, string>;
   mergedCells?: MergedCellRange[];
   hyperlinks?: Record<string, string>;
@@ -76,11 +97,14 @@ export interface SheetChart {
   valueRange: string;
 }
 
+export type SlideSizeId = "wide" | "standard";
+
 export interface SlideDeck {
   id: string;
   title: string;
   updatedAt: string;
   activeSlideId: string;
+  slideSize?: SlideSizeId;
   slides: Slide[];
 }
 

tasks/ollama-gemma-qword-header-footer.md

@@ -0,0 +1,139 @@
+# Ollama/Gemma Task: QOffice Next Iteration
+
+You are Gemma running through Ollama. Work on the local repository:
+
+```text
+G:\Repos\QOffice
+```
+
+Project objective: QOffice is a cross-platform Russian-language office suite intended to move toward Microsoft Office-like functionality. It contains separate applications: QWord, QExcell, QPowerPoint, and QOutlook. Microsoft Office file compatibility is a core requirement.
+
+Current verified repository state:
+
+- `git status --short --branch` returned `## main...origin/main`.
+- Latest commit before this task: `5487d04 Add QPowerPoint slide size support`.
+- QWord already has DOCX import/export, page setup controls, and a Microsoft Word-like ribbon.
+- QWord does not yet implement DOCX header/footer support.
+
+## Iteration Goal
+
+Implement QWord support for Microsoft Word / DOCX headers and footers.
+
+The feature must be real DOCX compatibility work. Do not implement this only as internal JSON state. Import and export must read and write actual DOCX header/footer parts or clearly explain why that is impossible after inspecting the local `docx` package API.
+
+## Files To Inspect First
+
+First check for local project instructions:
+
+```powershell
+rg --files -g AGENTS.md
+```
+
+Then inspect these files before editing:
+
+- `src/types.ts`
+- `src/data/sampleData.ts`
+- `src/App.tsx`
+- `src/io/wordOffice.ts`
+- `src/io/wordOffice.test.ts`
+- `src/io/wordOfficeImport.test.ts`
+- `src/features/qword/QWord.tsx`
+- `src/features/qword/QWord.test.tsx`
+
+## Verified Starting Points
+
+- `src/types.ts`: `WordDocument` currently has `id`, `title`, `updatedAt`, `html`, and optional `pageSetup`.
+- `src/io/wordOffice.ts`: `importDocxFile` imports DOCX through `mammoth`, `styledDocxHtmlFromArrayBuffer`, and `docxPageSetupFromArrayBuffer`.
+- `src/io/wordOffice.ts`: `exportDocxBlob` currently accepts only `pageSetup` in its options object.
+- `src/io/wordOffice.ts`: `lastDocxSectionProperties` already finds the final `w:sectPr`.
+- `src/features/qword/QWord.tsx`: `openDocx` applies imported `title`, `html`, and `pageSetup`.
+- `src/features/qword/QWord.tsx`: `saveDocx` passes only `pageSetup` into `exportDocxBlob`.
+- QWord's `layout` ribbon tab already contains page setup controls.
+
+## Implementation Requirements
+
+1. Data model:
+
+   Add optional QWord document fields. Preferred names:
+
+   ```ts
+   headerHtml?: string;
+   footerHtml?: string;
+   ```
+
+   Existing saved documents without these fields must remain valid.
+
+2. DOCX import:
+
+   - Read `word/document.xml`.
+   - Find the final applicable `w:sectPr`.
+   - Read `w:headerReference` and `w:footerReference`.
+   - Resolve their relationship ids through `word/_rels/document.xml.rels`.
+   - Read the corresponding `word/header*.xml` and `word/footer*.xml` parts.
+   - For this first iteration, support the `default` reference type.
+   - Do not break documents that also contain `first` or `even` references; those can be ignored for now.
+   - Convert header/footer content into HTML using the existing `wordOffice.ts` helper patterns. Preserve at least paragraphs and basic inline text styling.
+
+3. DOCX export:
+
+   - Extend `exportDocxBlob` options to accept `headerHtml` and `footerHtml`.
+   - Use the local `docx` package API to create real DOCX header/footer parts if available.
+   - Reuse the existing HTML-to-DOCX block pipeline where practical.
+   - Preserve existing `pageSetup` behavior.
+   - Generated DOCX must contain real header/footer parts and relationships.
+
+4. QWord UI:
+
+   - Add Russian-language controls for header and footer.
+   - Preferred location: QWord `layout` ribbon tab near page setup.
+   - Do not add a right sidebar.
+   - Use clear Russian labels, for example:
+     - `Верхний колонтитул`
+     - `Нижний колонтитул`
+   - Editing these fields must call `onChange` with updated `document.headerHtml` and `document.footerHtml`.
+   - `openDocx` must apply imported header/footer fields.
+   - `saveDocx` must pass header/footer fields to `exportDocxBlob`.
+
+5. Tests:
+
+   Add focused regression tests:
+
+   - Import DOCX with `headerReference` and `footerReference`; assert imported `headerHtml` and `footerHtml`.
+   - Export DOCX with header/footer; assert header/footer parts and relationships exist.
+   - Roundtrip export -> import; assert header/footer values survive.
+   - QWord UI test: changing header/footer controls calls `onChange` with `headerHtml` and `footerHtml`.
+
+## Verification Commands
+
+Run the narrow test set first:
+
+```powershell
+npx vitest run src\io\wordOffice.test.ts src\io\wordOfficeImport.test.ts src\features\qword\QWord.test.tsx
+```
+
+If the narrow tests pass, run:
+
+```powershell
+npm run build
+npm test
+npm audit --audit-level=high
+```
+
+## Constraints
+
+- Do not touch unrelated files.
+- Do not revert user changes.
+- Do not run destructive git commands.
+- Do not add dependencies unless necessary.
+- Follow the existing project patterns.
+- If you are only an LLM without filesystem access, return a unified diff patch and verification commands.
+- If you are running inside an agent with filesystem access, edit the files directly but do not commit or push.
+
+## Final Response Required
+
+Report:
+
+- changed files;
+- tests and command results;
+- exactly how DOCX import/export was implemented;
+- any remaining risks or unverified behavior.