fix(desktop): keep window tabs across app close (#34807)

packages/desktop/src/main/updater.ts

@@ -4,6 +4,7 @@ import { UPDATER_ENABLED } from "./constants"
 import { createUpdaterController, type UpdaterReadyRecord } from "./updater-controller"
 import { getLogger } from "./logging"
 import { getStore } from "./store"
+import { setAppQuitting } from "./windows"
 
 const { autoUpdater } = pkg
 const key = "ready"
@@ -27,7 +28,23 @@ export function setupAutoUpdater(stop: () => Promise<void>) {
   return createUpdaterController({
     enabled: UPDATER_ENABLED,
     currentVersion: app.getVersion(),
-    backend: autoUpdater,
+    backend: {
+      checkForUpdates: () => autoUpdater.checkForUpdates(),
+      downloadUpdate: () => autoUpdater.downloadUpdate(),
+      quitAndInstall: () => {
+        // quitAndInstall closes all windows before emitting before-quit, so
+        // flag the quit first to keep window ids persisted for restore.
+        setAppQuitting()
+        try {
+          autoUpdater.quitAndInstall()
+        } catch (error) {
+          // The install failed and the app keeps running; clear the flag so
+          // deliberate window closes prune ids again.
+          setAppQuitting(false)
+          throw error
+        }
+      },
+    },
     persistence: {
       get() {
         const value = store.get(key)