feat(ui): unify child surfaces and show web task creation in a modal (#1633)

ui/flutter/test/core/window/app_window_launcher_test.dart

@@ -3,6 +3,7 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:gopeed/api/model/create_task.dart';
 import 'package:gopeed/api/model/request.dart';
 import 'package:gopeed/core/window/app_window_launcher.dart';
+import 'package:gopeed/core/window/app_window_payload.dart';
 import 'package:gopeed/core/window/window_capability_transport.dart';
 
 void main() {
@@ -34,8 +35,10 @@ void main() {
       return null;
     });
 
-    final opened = await AppWindowLauncher.openCreateTaskWindow(
-      createTask: CreateTask(req: Request(url: 'https://example.com/file.zip')),
+    final opened = await AppWindowLauncher.open(
+      AppWindowPayload.createTask(
+        createTask: CreateTask(req: Request(url: 'https://example.com/file.zip')).toJson(),
+      ),
     );
 
     expect(opened, isTrue);
@@ -56,6 +59,6 @@ void main() {
       return null;
     });
 
-    expect(await AppWindowLauncher.openCreateTaskWindow(), isFalse);
+    expect(await AppWindowLauncher.open(AppWindowPayload.createTask()), isFalse);
   });
 }

ui/flutter/test/core/window/app_window_payload_test.dart

@@ -9,9 +9,9 @@ void main() {
   test('create-task child window has a localized native title', () {
     expect(
       AppWindowBootstrap.subWindowTitle(AppWindowType.createTask, appLocalizationsFor('en')),
-      'Gopeed-Create Task',
+      'Gopeed - Create Task',
     );
-    expect(AppWindowBootstrap.subWindowTitle(AppWindowType.createTask, appLocalizationsFor('zh')), 'Gopeed-创建任务');
+    expect(AppWindowBootstrap.subWindowTitle(AppWindowType.createTask, appLocalizationsFor('zh')), 'Gopeed - 创建任务');
   });
 
   test('create-task payload only carries initial task data', () {