widget refresh enhancements

ios/Runner/AppDelegate.swift

@@ -1,6 +1,7 @@
 import Flutter
 import UIKit
 import UserNotifications
+import workmanager_apple
 
 @main
 @objc class AppDelegate: FlutterAppDelegate, FlutterImplicitEngineDelegate {
@@ -23,6 +24,19 @@ import UserNotifications
   ) -> Bool {
     let result = super.application(application, didFinishLaunchingWithOptions: launchOptions)
     registerTalkCategory()
+    // BGAppRefresh for the home-screen widget. Must all happen before
+    // didFinishLaunching returns: with the UIScene lifecycle Flutter registers
+    // plugins only during scene connection, which is past BGTaskScheduler's
+    // registration deadline — registerLaunchHandlers() bridges that gap.
+    // The task identifier mirrors WidgetBackgroundTask.periodicTaskName; the
+    // plugin re-submits the refresh request itself after every run.
+    WorkmanagerPlugin.setPluginRegistrantCallback { registry in
+      GeneratedPluginRegistrant.register(with: registry)
+    }
+    WorkmanagerPlugin.registerPeriodicTask(
+      withIdentifier: "eu.mhsl.marianum.widget.refresh",
+      earliestBeginInSeconds: 1800)
+    WorkmanagerPlugin.registerLaunchHandlers()
     // FlutterAppDelegate conforms to UNUserNotificationCenterDelegate and
     // forwards these callbacks to the plugins (firebase_messaging,
     // flutter_local_notifications). We route Talk actions natively here — the

ios/Runner/Info.plist

@@ -66,6 +66,10 @@
 		</dict>
 		<key>UIApplicationSupportsIndirectInputEvents</key>
 		<true/>
+		<key>BGTaskSchedulerPermittedIdentifiers</key>
+		<array>
+			<string>eu.mhsl.marianum.widget.refresh</string>
+		</array>
 		<key>UIBackgroundModes</key>
 		<array>
 			<string>fetch</string>