fix(test): stabilize E2E cockpit flow and add LM Studio novel integration test

Harden cockpit dismiss timing and global settings navigation in E2E helpers, tune short-chapter AI prompts for local models, fix electron-updater CJS loading, and add a 10-chapter auto-writing integration test against LM Studio.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main/services/update.service.ts

@@ -1,8 +1,18 @@
+import { createRequire } from 'node:module'
 import { app, BrowserWindow } from 'electron'
-import electronUpdater from 'electron-updater'
+import type { AppUpdater } from 'electron-updater'
 import { IPC } from '../../shared/ipc-channels'
 
-const { autoUpdater } = electronUpdater
+const require = createRequire(import.meta.url)
+let autoUpdaterRef: AppUpdater | null = null
+
+function getAutoUpdater(): AppUpdater {
+  if (!autoUpdaterRef) {
+    const electronUpdater = require('electron-updater') as { autoUpdater: AppUpdater }
+    autoUpdaterRef = electronUpdater.autoUpdater
+  }
+  return autoUpdaterRef
+}
 
 export interface UpdateInfoPayload {
   version: string
@@ -31,6 +41,7 @@ export class UpdateService {
       !app.isPackaged ||
       process.env.NODE_ENV === 'development'
 
+    const autoUpdater = getAutoUpdater()
     autoUpdater.autoDownload = false
     autoUpdater.autoInstallOnAppQuit = true
 
@@ -62,7 +73,7 @@ export class UpdateService {
       this.broadcast(IPC.UPDATE_AVAILABLE, payload)
       return payload
     }
-    const result = await autoUpdater.checkForUpdates()
+    const result = await getAutoUpdater().checkForUpdates()
     const info = result?.updateInfo
     if (!info) return null
     return {
@@ -78,12 +89,12 @@ export class UpdateService {
       this.broadcast(IPC.UPDATE_DOWNLOADED, { version: this.mockVersion })
       return
     }
-    await autoUpdater.downloadUpdate()
+    await getAutoUpdater().downloadUpdate()
   }
 
   install(): void {
     if (this.disabled || this.mockVersion) return
-    autoUpdater.quitAndInstall()
+    getAutoUpdater().quitAndInstall()
   }
 
   private broadcast(channel: string, payload: unknown): void {