fix: harden application lifecycle and termination logic to prevent defunct processes and orphaned tray icons

frontend/electron/main.ts

@@ -164,7 +164,12 @@ const updateTrayMenu = () => {
     { label: 'Sync Now', enabled: !!config?.enabled, click: () => syncAccounts(true) },
     { type: 'separator' },
     { label: 'Show Dashboard', click: () => { if (mainWindow) { mainWindow.show(); mainWindow.focus(); } } },
-    { label: 'Quit', click: () => { (app as any).isQuitting = true; app.quit(); } }
+    { label: 'Quit', click: () => { 
+      console.log('[Tray] Quit requested');
+      (app as any).isQuitting = true; 
+      if (tray) tray.destroy();
+      app.quit(); 
+    } }
   ]);
   tray.setContextMenu(contextMenu);
 };
@@ -466,9 +471,32 @@ app.whenReady().then(() => {
   steamClient.startWatching(handleLocalAccountsFound);
 });
 
-app.on('window-all-closed', () => { if (process.platform !== 'darwin' && (app as any).isQuitting) app.quit(); });
+// Support for background running
+(app as any).isQuitting = false;
+
+app.on('before-quit', () => {
+  console.log('[App] Preparing to quit...');
+  (app as any).isQuitting = true;
+  if (tray) {
+    tray.destroy();
+    tray = null;
+  }
+});
+
+app.on('window-all-closed', () => { 
+  if (process.platform !== 'darwin' && (app as any).isQuitting) {
+    app.quit(); 
+  } 
+});
+
 app.on('activate', () => { if (BrowserWindow.getAllWindows().length === 0) createWindow(); else mainWindow?.show(); });
 
+// Handle terminal termination (Ctrl+C)
+process.on('SIGINT', () => {
+  (app as any).isQuitting = true;
+  app.quit();
+});
+
 // --- IPC Handlers ---
 ipcMain.handle('get-accounts', () => store.get('accounts'));
 ipcMain.handle('get-server-config', () => store.get('serverConfig'));