feat: support browse files on web (#283)

ui/flutter/lib/app/modules/task/controllers/task_downloaded_controller.dart

@@ -1,8 +1,7 @@
-
 import 'package:gopeed/app/modules/task/controllers/task_list_controller.dart';
 
 import '../../../../api/model/task.dart';
 
 class TaskDownloadedController extends TaskListController {
-  TaskDownloadedController() : super([Status.done]);
+  TaskDownloadedController() : super([Status.done], SortDirection.asc);
 }

ui/flutter/lib/app/modules/task/controllers/task_downloading_controller.dart

@@ -9,5 +9,5 @@ class TaskDownloadingController extends TaskListController {
           Status.pause,
           Status.wait,
           Status.error
-        ]);
+        ], SortDirection.desc);
 }

ui/flutter/lib/app/modules/task/controllers/task_list_controller.dart

@@ -5,10 +5,13 @@ import 'package:get/get.dart';
 import '../../../../api/api.dart';
 import '../../../../api/model/task.dart';
 
+enum SortDirection { asc, desc }
+
 abstract class TaskListController extends GetxController {
   List<Status> statuses;
+  SortDirection sortDirection;
 
-  TaskListController(this.statuses);
+  TaskListController(this.statuses, this.sortDirection);
 
   final tasks = <Task>[].obs;
   final isRunning = false.obs;
@@ -43,6 +46,15 @@ abstract class TaskListController extends GetxController {
   }
 
   getTasksState() async {
-    tasks.value = await getTasks(statuses);
+    final tasks = await getTasks(statuses);
+    // sort tasks by create time
+    tasks.sort((a, b) {
+      if (sortDirection == SortDirection.asc) {
+        return a.createdAt.compareTo(b.createdAt);
+      } else {
+        return b.createdAt.compareTo(a.createdAt);
+      }
+    });
+    this.tasks.value = tasks;
   }
 }