fix: 修复接单部门审核弹窗的任务类型和数量显示问题

1. 添加层级任务类型数据加载，支持递归查找三级分类
2. 修复任务类型显示为'未知类型'的问题（支持从层级数据中递归查找）
3. 修复任务数量全部显示为1的问题（从typeDetails中获取实际数量）
4. 将添加任务类型改为级联选择器（树形结构）

frontend/src/views/TaskHall.vue

@@ -1991,27 +1991,19 @@
               </div>
             </div>
             
-            <!-- 添加类型 -->
+            <!-- 添加类型（使用级联选择器） -->
             <div class="add-type-row" style="margin-top: 12px; display: flex; gap: 8px;">
-              <a-select
-                v-model:value="newTaskTypeId"
+              <a-cascader
+                v-model:value="newTaskTypePath"
+                :options="taskTypeCascaderOptions"
                 placeholder="选择要添加的任务类型"
                 style="flex: 1"
                 allow-clear
+                change-on-select
+                :show-search="{ filter: cascaderFilter }"
                 :dropdown-style="{ background: '#262626' }"
-              >
-                <a-select-option v-for="type in demandTypes" :key="type.id" :value="type.id">
-                  {{ type.name }}
-                </a-select-option>
-              </a-select>
-              <a-button type="primary" ghost style="border-color: #31f08b; color: #31f08b;" @click="() => {
-                if (newTaskTypeId && !approveTaskTypes.find(t => t.typeId === newTaskTypeId)) {
-                  approveTaskTypes.push({ typeId: newTaskTypeId, quantity: 1 })
-                  newTaskTypeId = undefined
-                } else if (newTaskTypeId) {
-                  message.warning('该任务类型已添加')
-                }
-              }">
+              />
+              <a-button type="primary" ghost style="border-color: #31f08b; color: #31f08b;" @click="handleAddApproveTaskType">
                 <Icon name="plus" size="sm" style="margin-right: 4px" /> 添加
               </a-button>
             </div>
@@ -2364,6 +2356,7 @@ import DefaultLayout from '@/layouts/DefaultLayout.vue'
 import Icon from '@/components/Icon.vue'
 import * as taskApi from '@/api/task'
 import * as userApi from '@/api/user'
+import * as configApi from '@/api/config'
 import type { Task, TaskApprovalDTO, TaskProduct } from '@/api/task'
 import type { DesignerWithWorkload } from '@/api/user'
 import { useConfigStore } from '@/stores/config'
@@ -2485,6 +2478,38 @@ const brands = computed(() => configStore.brands)
 const platforms = computed(() => configStore.platforms)
 const categories = computed(() => configStore.categories)
 
+// 层级任务类型数据（用于级联选择器）
+const hierarchicalTaskTypes = ref<any[]>([])
+
+// 递归查找任务类型（从层级数据中查找，支持三级分类）
+const findTaskTypeById = (id: number, items: any[] = hierarchicalTaskTypes.value): any => {
+  for (const item of items) {
+    if (item.id === id) return item
+    if (item.children) {
+      const found = findTaskTypeById(id, item.children)
+      if (found) return found
+    }
+  }
+  return null
+}
+
+// 构建级联选择器选项
+const taskTypeCascaderOptions = computed(() => {
+  const buildOptions = (items: any[]): any[] => {
+    return items.map(item => {
+      const option: any = {
+        value: item.id,
+        label: item.name
+      }
+      if (item.children && item.children.length > 0) {
+        option.children = buildOptions(item.children)
+      }
+      return option
+    })
+  }
+  return buildOptions(hierarchicalTaskTypes.value)
+})
+
 // 筛选条件
 const filters = reactive({
   taskTypeId: undefined as number | undefined,
@@ -2573,7 +2598,10 @@ const getTaskTypeName = (typeId: number, taskTypeName?: string, taskSubType?: st
   if (taskSubType) return taskSubType
   // 如果有直接传入的类型名称，使用它
   if (taskTypeName) return taskTypeName
-  // 从需求类型列表中查找
+  // 从层级数据中递归查找（支持三级分类）
+  const typeInfo = findTaskTypeById(typeId)
+  if (typeInfo) return typeInfo.name
+  // 兼容：从平铺列表中查找
   const type = demandTypes.value.find(t => t.id === typeId)
   return type?.name || '未知类型'
 }
@@ -2592,6 +2620,10 @@ const parseTypeDetails = (typeDetails: string | TaskTypeDetail[] | undefined): T
 
 // 获取任务类型单位积分
 const getTaskTypeUnitScore = (typeId: number) => {
+  // 从层级数据中递归查找（支持三级分类）
+  const typeInfo = findTaskTypeById(typeId)
+  if (typeInfo && typeInfo.unitScore) return typeInfo.unitScore
+  // 兼容：从平铺列表中查找
   const type = demandTypes.value.find(t => t.id === typeId)
   return type?.unitScore || 0
 }
@@ -2714,6 +2746,11 @@ const isHighScoreTask = (task: TaskOrSubTask) => {
 const loadConfigs = async () => {
   try {
     await configStore.loadAllConfigs()
+    // 加载层级任务类型数据（用于级联选择器和递归查找）
+    const response = await configApi.getDemandTypesTree()
+    if (response && response.data) {
+      hierarchicalTaskTypes.value = response.data
+    }
   } catch (error) {
     console.error('加载配置数据失败：', error)
   }
@@ -3024,7 +3061,30 @@ const approveAssignType = ref<'auto' | 'manual'>('auto')
 const approveTaskTypes = ref<Array<{typeId: number, quantity: number}>>([])
 const approveDesignerId = ref<number | undefined>(undefined)
 const designersList = ref<DesignerWithWorkload[]>([])
-const newTaskTypeId = ref<number | undefined>(undefined)
+const newTaskTypePath = ref<(string | number)[] | undefined>(undefined)
+
+// 级联选择器搜索过滤
+const cascaderFilter = (inputValue: string, path: any[]) => {
+  return path.some(option => 
+    option.label.toLowerCase().indexOf(inputValue.toLowerCase()) > -1
+  )
+}
+
+// 添加审核弹窗中的任务类型
+const handleAddApproveTaskType = () => {
+  if (!newTaskTypePath.value || newTaskTypePath.value.length === 0) {
+    message.warning('请选择任务类型')
+    return
+  }
+  // 获取最后一个ID（即最深层级的类型ID）
+  const typeId = newTaskTypePath.value[newTaskTypePath.value.length - 1] as number
+  if (approveTaskTypes.value.find(t => t.typeId === typeId)) {
+    message.warning('该任务类型已添加')
+    return
+  }
+  approveTaskTypes.value.push({ typeId, quantity: 1 })
+  newTaskTypePath.value = undefined
+}
 
 // 格式化相对时间
 const formatDeadlineRelative = (deadline: string) => {
@@ -3067,17 +3127,34 @@ const showAssignDesignerModal = async (task: Task) => {
     approveTaskData.value = task
     approveAssignType.value = 'auto'
     approveDesignerId.value = undefined
-    newTaskTypeId.value = undefined
+    newTaskTypePath.value = undefined
     
-    // 解析任务类型
-    const taskTypeIdsStr = task.taskTypeIds || task.taskTypeId?.toString() || ''
-    const taskTypeIdArray = taskTypeIdsStr.split(',').filter(id => id.trim())
+    // 解析任务类型 - 优先从 typeDetails 获取（包含每个类型的实际数量）
+    let typeDetailsArray: TaskTypeDetail[] = []
+    if ((task as any).typeDetails) {
+      try {
+        const details = (task as any).typeDetails
+        typeDetailsArray = typeof details === 'string' ? JSON.parse(details) : details
+      } catch (e) {
+        console.warn('解析 typeDetails 失败:', e)
+      }
+    }
     
-    // 初始化任务类型列表
-    approveTaskTypes.value = taskTypeIdArray.map(id => ({
-      typeId: parseInt(id.trim()),
-      quantity: task.quantity || 1
-    }))
+    // 如果有 typeDetails，从中获取任务类型和数量
+    if (typeDetailsArray.length > 0) {
+      approveTaskTypes.value = typeDetailsArray.map(detail => ({
+        typeId: detail.typeId,
+        quantity: detail.quantity || 1
+      }))
+    } else {
+      // 兼容旧数据：从 taskTypeIds 获取
+      const taskTypeIdsStr = task.taskTypeIds || task.taskTypeId?.toString() || ''
+      const taskTypeIdArray = taskTypeIdsStr.split(',').filter(id => id.trim())
+      approveTaskTypes.value = taskTypeIdArray.map(id => ({
+        typeId: parseInt(id.trim()),
+        quantity: task.quantity || 1
+      }))
+    }
     
     approveModalVisible.value = true
   } catch (error: any) {