fixed incorrect cast

lib/pages/task_overview_page.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
 
 import '../example_data.dart';
+import '../model/callback_models/create_task_request.dart';
 import '../model/task.dart';
+import '../service/tools.dart';
 import 'task_edit_page.dart';
 
 class TaskOverviewPage extends StatefulWidget {
@@ -38,15 +40,22 @@ class _TaskOverviewPageState extends State<TaskOverviewPage> {
       key: Key(task.id),
       title: Text(task.title),
       subtitle: Text(task.description),
-      onTap: () => onTaskTapped(task),
+      onTap: () async {
+        final result = await onTaskTapped(task);
+        if (result != null) {
+          tasks.remove(task);
+          tasks.add(result.toTask(id: task.id, position: task.position));
+          setState(() {});
+        }
+      },
     );
   }
 
-  Future<Task?> onTaskTapped(Task task) async {
+  Future<CreateTaskRequest?> onTaskTapped(Task task) async {
     final result = await Navigator.of(
       context,
     ).pushNamed(TaskEditPage.routeName, arguments: task);
-    return result as Task?;
+    return result as CreateTaskRequest?;
   }
 
   List<Task> reorderList(List<Task> tasks, oldIndex, newIndex) {
@@ -65,10 +74,12 @@ class _TaskOverviewPageState extends State<TaskOverviewPage> {
   void onCreateTaskTapped() async {
     //TODO: example data call
     final result =
-        await Navigator.of(context).pushNamed(TaskEditPage.routeName) as Task?;
+        await Navigator.of(context).pushNamed(TaskEditPage.routeName)
+            as CreateTaskRequest?;
 
     if (result != null) {
-      tasks.add(result);
+      tasks.add(result.toTask(id: generateId(), position: tasks.length));
+      setState(() {});
     }
   }
 }