feat: 添加流水线任务子任务处理人展开显示功能

- 在任务卡片中添加展开/折叠功能，显示每个子任务的详细处理人信息
- 支持显示子任务编号、处理人姓名和状态
- 更新TaskCard组件和TaskHall页面，添加相应的样式和交互逻辑

frontend/src/components/TaskCard.vue

@@ -52,7 +52,25 @@
       </div>
       <div v-if="showReceiver" class="info-item">
         <span class="label">{{ receiverLabel }}</span>
-        <span class="value">{{ task.receiverName || '--' }}</span>
+        <span class="value">
+          <span>{{ task.receiverName || '--' }}</span>
+          <span v-if="task.isPipeline === 1 && task.subTasks && task.subTasks.length > 0" 
+                class="expand-subtasks" 
+                @click.stop="toggleSubtasks">
+            <Icon :name="showSubtasks ? 'arrowUp' : 'arrowDown'" size="xs" style="margin-left: 4px; cursor: pointer;" />
+          </span>
+        </span>
+      </div>
+      <!-- 流水线任务子任务详细信息（可展开） -->
+      <div v-if="showReceiver && task.isPipeline === 1 && task.subTasks && task.subTasks.length > 0 && showSubtasks" 
+           class="subtasks-detail">
+        <div v-for="(subTask, index) in task.subTasks" :key="subTask.id || index" class="subtask-item">
+          <span class="subtask-label">{{ subTask.itemNo || `子任务${index + 1}` }}:</span>
+          <span class="subtask-receiver">{{ subTask.receiverName || '待接单' }}</span>
+          <span :class="['subtask-status', getSubTaskStatusClass(subTask.status)]">
+            {{ getSubTaskStatusText(subTask.status) }}
+          </span>
+        </div>
       </div>
       <div v-if="task.brandName" class="detail-item">
         <span class="icon">
@@ -133,12 +151,19 @@
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue'
+import { computed, ref } from 'vue'
 import { message } from 'ant-design-vue'
 import Icon from './Icon.vue'
 import dayjs from 'dayjs'
 import { useConfigStore } from '@/stores/config'
 
+interface TaskItem {
+  id?: number
+  itemNo?: string
+  receiverName?: string
+  status: string
+}
+
 interface Task {
   id: number
   taskNo: string
@@ -161,6 +186,8 @@ interface Task {
   deadline?: string
   completeTime?: string
   submitTime?: string
+  isPipeline?: number
+  subTasks?: TaskItem[]
 }
 
 interface Props {
@@ -179,6 +206,11 @@ const props = withDefaults(defineProps<Props>(), {
 defineEmits(['click'])
 
 const configStore = useConfigStore()
+const showSubtasks = ref(false)
+
+const toggleSubtasks = () => {
+  showSubtasks.value = !showSubtasks.value
+}
 
 // 状态相关计算属性
 const statusClass = computed(() => {
@@ -278,6 +310,30 @@ const handleCopyTaskNo = async (taskNo: string) => {
     document.body.removeChild(textarea)
   }
 }
+
+// 获取子任务状态文本
+const getSubTaskStatusText = (status: string) => {
+  const statusMap: Record<string, string> = {
+    'locked': '已锁定',
+    'pending': '待接单',
+    'in_progress': '进行中',
+    'completed': '已完成',
+    'rejected': '已驳回'
+  }
+  return statusMap[status] || status
+}
+
+// 获取子任务状态样式类
+const getSubTaskStatusClass = (status: string) => {
+  const classMap: Record<string, string> = {
+    'locked': 'status-locked',
+    'pending': 'status-pending',
+    'in_progress': 'status-in-progress',
+    'completed': 'status-completed',
+    'rejected': 'status-rejected'
+  }
+  return classMap[status] || ''
+}
 </script>
 
 <style lang="scss" scoped>
@@ -340,6 +396,9 @@ const handleCopyTaskNo = async (taskNo: string) => {
         font-size: 14px;
         font-weight: 500;
         color: $text-primary;
+        display: inline-flex;
+        align-items: center;
+        gap: 4px;
 
         &.text-brand {
           color: #31f08b;
@@ -362,6 +421,19 @@ const handleCopyTaskNo = async (taskNo: string) => {
             }
           }
         }
+
+        .expand-subtasks {
+          display: inline-flex;
+          align-items: center;
+          cursor: pointer;
+          opacity: 0.7;
+          transition: opacity 0.2s;
+
+          &:hover {
+            opacity: 1;
+            color: #31f08b;
+          }
+        }
       }
     }
   }
@@ -402,6 +474,66 @@ const handleCopyTaskNo = async (taskNo: string) => {
         align-items: center;
       }
     }
+
+    .subtasks-detail {
+      margin-top: $space-xs;
+      padding: $space-sm;
+      background: rgba(49, 240, 139, 0.05);
+      border-radius: $radius-sm;
+      border: 1px solid rgba(49, 240, 139, 0.1);
+
+      .subtask-item {
+        display: flex;
+        align-items: center;
+        gap: $space-xs;
+        font-size: 12px;
+        padding: 4px 0;
+        color: $text-secondary;
+
+        .subtask-label {
+          color: $text-primary;
+          font-weight: 500;
+          min-width: 80px;
+        }
+
+        .subtask-receiver {
+          color: $text-primary;
+          flex: 1;
+        }
+
+        .subtask-status {
+          padding: 2px 8px;
+          border-radius: $radius-sm;
+          font-size: 11px;
+          font-weight: 500;
+
+          &.status-completed {
+            background: rgba(49, 240, 139, 0.2);
+            color: #31f08b;
+          }
+
+          &.status-in-progress {
+            background: rgba(59, 130, 246, 0.2);
+            color: #3B82F6;
+          }
+
+          &.status-pending {
+            background: rgba(156, 163, 175, 0.2);
+            color: #9CA3AF;
+          }
+
+          &.status-locked {
+            background: rgba(107, 114, 128, 0.2);
+            color: #6B7280;
+          }
+
+          &.status-rejected {
+            background: rgba(239, 68, 68, 0.2);
+            color: #EF4444;
+          }
+        }
+      }
+    }
   }
 
   .task-progress {

frontend/src/views/TaskHall.vue

@@ -1715,7 +1715,27 @@
                     <span class="icon">
                       <Icon name="user" size="sm" color="#31f08b" />
                     </span>
-                    <span>处理人: {{ task.receiverName || '待接单' }}</span>
+                    <span>
+                      处理人: {{ task.receiverName || '待接单' }}
+                      <span 
+                        v-if="task.isPipeline === 1 && task.subTasks && task.subTasks.length > 0 && task.id" 
+                        class="expand-subtasks" 
+                        @click.stop="toggleTaskSubtasks(task.id!)"
+                      >
+                        <Icon :name="expandedTaskSubtasks[task.id!] ? 'arrowUp' : 'arrowDown'" size="xs" style="margin-left: 4px; cursor: pointer;" />
+                      </span>
+                    </span>
+                  </div>
+                  <!-- 流水线任务子任务详细信息（可展开） -->
+                  <div v-if="task.isPipeline === 1 && task.subTasks && task.subTasks.length > 0 && task.id && expandedTaskSubtasks[task.id]" 
+                       class="subtasks-detail">
+                    <div v-for="(subTask, index) in task.subTasks" :key="subTask.id || index" class="subtask-item">
+                      <span class="subtask-label">{{ getSubTaskLabel(subTask, index) }}:</span>
+                      <span class="subtask-receiver">{{ subTask.receiverName || '待接单' }}</span>
+                      <span :class="['subtask-status', getSubTaskStatusClass(subTask.status)]">
+                        {{ getSubTaskStatusText(subTask.status) }}
+                      </span>
+                    </div>
                   </div>
                   <div v-if="task.brandName" class="detail-item">
                     <span class="icon">
@@ -2842,11 +2862,20 @@ const getSubTaskLabel = (subTask: any, index: number) => {
 }
 
 const getSubTaskStatusText = (status: string | undefined) => {
-  switch (status) {
-    case 'completed': return '已完成'
-    case 'in_progress': return '进行中'
-    default: return '待接单'
+  const statusMap: Record<string, string> = {
+    'locked': '已锁定',
+    'pending': '待接单',
+    'in_progress': '进行中',
+    'completed': '已完成',
+    'rejected': '已驳回'
   }
+  return statusMap[status || ''] || status || '未知'
+}
+
+// 展开/折叠任务子任务详情
+const expandedTaskSubtasks = ref<Record<number, boolean>>({})
+const toggleTaskSubtasks = (taskId: number) => {
+  expandedTaskSubtasks.value[taskId] = !expandedTaskSubtasks.value[taskId]
 }
 
 // 判断任务是否有子任务在进行中
@@ -6631,6 +6660,83 @@ onUnmounted(() => {
       text-decoration: underline;
     }
   }
+  
+  // 展开/折叠图标
+  .expand-subtasks {
+    display: inline-flex;
+    align-items: center;
+    cursor: pointer;
+    opacity: 0.7;
+    transition: opacity 0.2s;
+    margin-left: 4px;
+
+    &:hover {
+      opacity: 1;
+      color: #31f08b;
+    }
+  }
+  
+  // 子任务详情展开样式
+  .subtasks-detail {
+    grid-column: 1 / -1;
+    margin-top: $space-xs;
+    padding: $space-sm;
+    background: rgba(49, 240, 139, 0.05);
+    border-radius: $radius-sm;
+    border: 1px solid rgba(49, 240, 139, 0.1);
+
+    .subtask-item {
+      display: flex;
+      align-items: center;
+      gap: $space-sm;
+      font-size: 12px;
+      padding: 4px 0;
+      color: $text-secondary;
+
+      .subtask-label {
+        color: $text-primary;
+        font-weight: 500;
+        min-width: 80px;
+      }
+
+      .subtask-receiver {
+        color: $text-primary;
+        flex: 1;
+      }
+
+      .subtask-status {
+        padding: 2px 8px;
+        border-radius: $radius-sm;
+        font-size: 11px;
+        font-weight: 500;
+
+        &.status-completed {
+          background: rgba(49, 240, 139, 0.2);
+          color: #31f08b;
+        }
+
+        &.status-in-progress {
+          background: rgba(59, 130, 246, 0.2);
+          color: #3B82F6;
+        }
+
+        &.status-pending {
+          background: rgba(156, 163, 175, 0.2);
+          color: #9CA3AF;
+        }
+
+        &.status-locked {
+          background: rgba(107, 114, 128, 0.2);
+          color: #6B7280;
+        }
+
+        &.status-rejected {
+          background: rgba(239, 68, 68, 0.2);
+          color: #EF4444;
+        }
+      }
+    }
+  }
 }
 
 /* 审批弹窗暗黑主题适配 */