fix: 打卡失败弹窗 back=false→true，3秒后自动关闭

back=false 导致弹窗不自动消失。改为 back=true 与其他错误提示行为一致。

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/xiaoqu/watch/ui/task/TaskDetailFragment.kt

@@ -236,7 +236,7 @@ class TaskDetailFragment : BaseFragment<FragmentTaskDetailBinding>() {
                         status = QuTipDialog.Status.ERROR,
                         title = "打卡失败",
                         desc = message,
-                        back = false, step = 0, countdown = 3
+                        back = true, step = 0, countdown = 3
                     )
                 }
                 btn.text = "开启打卡"

app/src/main/java/com/xiaoqu/watch/ui/task/TaskListFragment.kt

@@ -465,7 +465,7 @@ class TaskListFragment : BaseFragment<FragmentTaskListBinding>() {
                         status = QuTipDialog.Status.ERROR,
                         title = "打卡失败",
                         desc = message,
-                        back = false, step = 0, countdown = 3
+                        back = true, step = 0, countdown = 3
                     )
                 }
                 // 恢复按钮