fix: 修复设计师大厅任务列表展开显示问题 - 添加缺失的formatDate函数 - 后端返回完整的startTime和deadline字段

backend/src/main/java/com/designhub/service/DesignerService.java

@@ -462,6 +462,7 @@ public class DesignerService {
             item.put("status", task.getStatus());
             item.put("progress", task.getProgress());
             item.put("score", task.getScore());
+            item.put("startTime", task.getStartTime());
             item.put("deadline", task.getDeadline());
             item.put("createTime", task.getCreateTime());
             item.put("isSubTask", false);
@@ -485,6 +486,8 @@ public class DesignerService {
             taskItem.put("status", item.getStatus());
             taskItem.put("progress", item.getProgress());
             taskItem.put("score", item.getTotalScore());
+            taskItem.put("startTime", item.getStartTime());
+            taskItem.put("deadline", item.getDeadline());
             taskItem.put("createTime", item.getCreateTime());
             taskItem.put("isSubTask", true);
             taskItem.put("type", "子任务");

frontend/src/views/DesignerHall.vue

@@ -307,6 +307,12 @@ const availableMonths = computed(() => {
   return months
 })
 
+// 格式化日期
+const formatDate = (date: string | null | undefined) => {
+  if (!date) return '-'
+  return dayjs(date).format('MM/DD HH:mm')
+}
+
 // 总览数据
 const totalCount = computed(() => designersList.value.length)
 const onlineCount = computed(() =>