🐛 fix(word-merge): 修复文档合并功能无法生成正确Word文件的问题

- 将baseDocx.generateAsync改为baseZip.generateAsync，解决文档生成失败问题

src/client/admin/pages/WordMerge.tsx

@@ -149,7 +149,7 @@ const WordMergePage: React.FC = () => {
       baseZip.file('word/document.xml', mergedContent);
       
       // 生成合并后的Word文档
-      const mergedDoc = await baseDocx.generateAsync({
+      const mergedDoc = await baseZip.generateAsync({
         type: 'blob',
         mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
         compression: 'DEFLATE',