双面打印

electron/main.js

@@ -300,16 +300,18 @@ ipcMain.handle("print-pdf", async (event, pdfDataOrUrl, printOptions = {}) => {
       throw new Error(`PDF文件大小异常（${stats.size} bytes），可能文件损坏`);
     }
 
+    const duplexMode = printOptions?.duplex;
     log.info(
       `准备打印PDF: ${pdfFilePath}, 打印机: ${
         targetPrinterName || "默认打印机"
-      }`
+      }, 双面打印: ${duplexMode ? "是" : "否"}`
     );
 
     // 使用 pdf-to-printer 打印
     const printOptions_ptp = {
       printer: targetPrinterName || undefined,
       silent: true, // 静默打印
+      duplex: duplexMode || false, // 双面打印选项
     };
 
     await ptp.print(pdfFilePath, printOptions_ptp);