纠正发布任务备注问题

lib/ui/function_and_service/task/publish_task_page.dart

@@ -776,7 +776,7 @@ class _PublishTaskPageState extends State<PublishTaskPage> {
               _content = await Get.to(() => TaskRemarkPage(
                         text: _content,
                       )) ??
-                  '';
+                  _content;
               setState(() {});
             },
             child: Material(
@@ -792,11 +792,11 @@ class _PublishTaskPageState extends State<PublishTaskPage> {
                         .make(),
                   ),
                   Expanded(
-                    child: '${_content == null ? '请输入任务备注' : _content}'
+                    child: '${_content == '' ? '请输入任务备注' : _content}'
                         .text
                         .size(28.sp)
                         .color(Colors.black
-                            .withOpacity(_rewardType == 0 ? 0.25 : 0.85))
+                            .withOpacity(_content == '' ? 0.25 : 0.85))
                         .make(),
                   ),
                   20.wb,