fix(electron): improve error handling during app initialization and updater events (#461)

electron/main/index.ts

@@ -365,7 +365,9 @@ app.on('second-instance', () => {
 
 // Application lifecycle
 app.whenReady().then(() => {
-  initialize();
+  void initialize().catch((error) => {
+    logger.error('Application initialization failed:', error);
+  });
 
   // Register activate handler AFTER app is ready to prevent
   // "Cannot create BrowserWindow before app is ready" on macOS.

electron/main/updater.ts

@@ -52,6 +52,12 @@ export class AppUpdater extends EventEmitter {
 
   constructor() {
     super();
+
+    // EventEmitter treats an unhandled 'error' event as fatal. Keep a default
+    // listener so updater failures surface in logs/UI without terminating main.
+    this.on('error', (error: Error) => {
+      logger.error('[Updater] AppUpdater emitted error:', error);
+    });
     
     autoUpdater.autoDownload = false;
     autoUpdater.autoInstallOnAppQuit = true;