fix: task view ui

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

@@ -0,0 +1,5 @@
+import 'package:get/get.dart';
+
+class TaskController extends GetxController {
+  final tabIndex = 0.obs;
+}

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

@@ -0,0 +1,9 @@
+import 'dart:async';
+
+import 'package:gopeed/app/modules/task/controllers/task_list_controller.dart';
+
+import '../../../../api/model/task.dart';
+
+class TaskDownloadedController extends TaskListController {
+  TaskDownloadedController() : super([Status.done]);
+}

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

@@ -0,0 +1,7 @@
+import '../../../../api/model/task.dart';
+import 'task_list_controller.dart';
+
+class TaskDownloadingController extends TaskListController {
+  TaskDownloadingController()
+      : super([Status.ready, Status.running, Status.pause, Status.error]);
+}

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

@@ -0,0 +1,48 @@
+import 'dart:async';
+
+import 'package:get/get.dart';
+
+import '../../../../api/api.dart';
+import '../../../../api/model/task.dart';
+
+abstract class TaskListController extends GetxController {
+  List<Status> statuses;
+
+  TaskListController(this.statuses);
+
+  final tasks = <Task>[].obs;
+  final isRunning = false.obs;
+
+  late final Timer _timer;
+
+  @override
+  void onInit() async {
+    super.onInit();
+
+    start();
+    _timer = Timer.periodic(const Duration(milliseconds: 1000), (timer) async {
+      if (isRunning.value) {
+        await getTasksState();
+      }
+    });
+  }
+
+  @override
+  void onClose() {
+    super.onClose();
+    _timer.cancel();
+  }
+
+  void start() async {
+    await getTasksState();
+    isRunning.value = true;
+  }
+
+  void stop() {
+    isRunning.value = false;
+  }
+
+  getTasksState() async {
+    tasks.value = await getTasks(statuses);
+  }
+}