fix: 任务中心标签页显示真实任务数量

- 移除硬编码的任务数量(12/5/28/3)
- 加载所有任务后统计各状态数量
- 后端任务API page_size限制调整为500

frontend/src/views/manager/assignment-center.vue

@@ -28,22 +28,22 @@
       <el-tabs v-model="activeTab" @tab-click="handleTabClick">
         <el-tab-pane label="进行中" name="ongoing">
           <span slot="label">
-            进行中 <el-badge :value="12" class="tab-badge" />
+            进行中 <el-badge :value="taskCounts.ongoing" class="tab-badge" v-if="taskCounts.ongoing > 0" />
           </span>
         </el-tab-pane>
         <el-tab-pane label="待开始" name="pending">
           <span slot="label">
-            待开始 <el-badge :value="5" class="tab-badge" />
+            待开始 <el-badge :value="taskCounts.pending" class="tab-badge" v-if="taskCounts.pending > 0" />
           </span>
         </el-tab-pane>
         <el-tab-pane label="已完成" name="completed">
           <span slot="label">
-            已完成 <el-badge :value="28" class="tab-badge" />
+            已完成 <el-badge :value="taskCounts.completed" class="tab-badge" v-if="taskCounts.completed > 0" />
           </span>
         </el-tab-pane>
         <el-tab-pane label="已过期" name="expired">
           <span slot="label">
-            已过期 <el-badge :value="3" class="tab-badge" />
+            已过期 <el-badge :value="taskCounts.expired" class="tab-badge" v-if="taskCounts.expired > 0" />
           </span>
         </el-tab-pane>
       </el-tabs>
@@ -383,6 +383,14 @@ const taskStats = ref([
 // 任务列表数据
 const allTasks = ref<Task[]>([])
 
+// 各状态任务数量
+const taskCounts = reactive({
+  ongoing: 0,
+  pending: 0,
+  completed: 0,
+  expired: 0
+})
+
 // 任务表单
 const taskForm = reactive({
   title: '',
@@ -417,9 +425,6 @@ const rules = reactive<FormRules>({
 
 // 根据当前标签页筛选的任务列表
 const taskList = computed(() => {
-  if (activeTab.value === 'ongoing') {
-    return allTasks.value
-  }
   return allTasks.value.filter(task => task.status === activeTab.value)
 })
 
@@ -442,15 +447,20 @@ const loadTaskStats = async () => {
 }
 
 /**
- * 加载任务列表
+ * 加载任务列表（加载所有任务，前端筛选）
  */
 const loadTasks = async () => {
   loading.value = true
   try {
-    const status = activeTab.value === 'ongoing' ? 'ongoing' : activeTab.value
-    const res = await getTasks({ status })
+    // 不传status参数，获取所有任务
+    const res = await getTasks({ page_size: 500 })
     if (res.code === 200 && res.data) {
       allTasks.value = res.data.items
+      // 统计各状态任务数量
+      taskCounts.ongoing = allTasks.value.filter(t => t.status === 'ongoing').length
+      taskCounts.pending = allTasks.value.filter(t => t.status === 'pending').length
+      taskCounts.completed = allTasks.value.filter(t => t.status === 'completed').length
+      taskCounts.expired = allTasks.value.filter(t => t.status === 'expired').length
     }
   } catch (error: any) {
     console.error('加载任务列表失败:', error)