Preserve QWord bookmarks in DOCX

src/io/wordOfficeImport.test.ts

@@ -184,6 +184,21 @@ describe("wordOffice DOCX import", () => {
     ]);
   });
 
+  it("imports DOCX bookmarks as HTML ids", async () => {
+    const blob = await exportDocxBlob("Bookmark.docx", '<h1 id="Section1">Section</h1><p><a href="#Section1">Open section</a></p>');
+    const file = new File([blob], "Bookmark.docx", {
+      type: "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+    });
+    const imported = await importDocxFile(file);
+
+    expect(imported.html).toContain('<h1 id="Section1">Section</h1>');
+    expect(imported.html).toContain('<a href="#Section1">Open section</a>');
+    expect(htmlToWordBlocks(imported.html)).toEqual([
+      { type: "heading", level: 1, text: "Section", runs: [{ text: "Section" }], bookmark: "Section1" },
+      { type: "paragraph", text: "Open section", runs: [{ text: "Open section", href: "#Section1" }] }
+    ]);
+  });
+
   it("imports simple DOCX tables from OOXML", async () => {
     const blob = await exportDocxBlob(
       "Table.docx",