fix(electron): 修复客户端下载功能无法启动的问题

- 将 onRenderer 参数从 mainWindow 改为 getMainWindow 函数，解决模块加载时 mainWindow 为 null 导致下载无法触发的问题
  - 处理 InterruptedError 错误，避免下载中断时抛出未处理异常

electron/electron-down.js

@@ -2,7 +2,7 @@ const {BrowserWindow, screen, shell, ipcMain} = require('electron')
 const fs = require('fs');
 const path = require('path');
 const loger = require("electron-log");
-const {default: electronDl, download, CancelError} = require("@dootask/electron-dl");
+const {default: electronDl, download, CancelError, InterruptedError} = require("@dootask/electron-dl");
 const utils = require("./lib/utils");
 const {DownloadManager, DownloadStore} = require("./lib/download-manager");
 
@@ -116,10 +116,12 @@ async function createDownload(window_, url, options = {}) {
     try {
         return await download(window_, url, options);
     } catch (error) {
-        // electron-dl rejects with CancelError when a download is cancelled; treat it as expected.
+        // electron-dl rejects with CancelError/InterruptedError; treat them as expected.
         const isCancelError = (typeof CancelError === 'function' && error instanceof CancelError)
             || error?.name === 'CancelError';
-        if (!isCancelError) {
+        const isInterruptedError = (typeof InterruptedError === 'function' && error instanceof InterruptedError)
+            || error?.name === 'InterruptedError';
+        if (!isCancelError && !isInterruptedError) {
             throw error;
         }
         return null;

electron/electron.js

@@ -1060,4 +1060,4 @@ ipcMain.on('updateQuitAndInstall', (event, args) => {
 //================================================================
 
 onExport()
-onRenderer(mainWindow)
+onRenderer(() => mainWindow)

electron/lib/renderer.js

@@ -572,7 +572,7 @@ const renderer = {
     },
 }
 
-const onRenderer = (mainWindow) => {
+const onRenderer = (getMainWindow) => {
     ipcMain.on("rendererReq", async (event, args) => {
         try {
             let ret = null;
@@ -651,7 +651,7 @@ const onRenderer = (mainWindow) => {
                     ret = await electronDown.updateWindow(args.language, args.theme);
                     break;
                 case 'createDownload':
-                    ret = await electronDown.createDownload(mainWindow, args.url, args.options || {});
+                    ret = await electronDown.createDownload(getMainWindow(), args.url, args.options || {});
                     break;
                 case 'watchFile':
                     ret = await renderer.watchFile(args.path);