feat: batch operation task (#860)

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

@@ -6,5 +6,4 @@ class TaskController extends GetxController {
   final tabIndex = 0.obs;
   final scaffoldKey = GlobalKey<ScaffoldState>();
   final selectTask = Rx<Task?>(null);
-  final copyUrlDone = false.obs;
 }

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

@@ -9,5 +9,13 @@ class TaskDownloadingController extends TaskListController {
           Status.pause,
           Status.wait,
           Status.error
-        ], (a, b) => b.createdAt.compareTo(a.createdAt));
+        ], (a, b) {
+          if (a.status == Status.running && b.status != Status.running) {
+            return -1;
+          } else if (a.status != Status.running && b.status == Status.running) {
+            return 1;
+          } else {
+            return b.updatedAt.compareTo(a.updatedAt);
+          }
+        });
 }

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

@@ -12,6 +12,7 @@ abstract class TaskListController extends GetxController {
   TaskListController(this.statuses, this.compare);
 
   final tasks = <Task>[].obs;
+  final selectedTaskIds = <String>[].obs;
   final isRunning = false.obs;
 
   late final Timer _timer;