fix: 接单部门Tab计数与Dashboard统计保持一致（包含主任务+子任务）

frontend/src/views/TaskHall.vue

@@ -5795,17 +5795,29 @@ const loadAllTabCounts = async () => {
           }).catch(() => {})
         )
       } else {
-        // 接单部门视角：查询该部门接收的进行中任务
+        // 接单部门视角：查询该部门接收的进行中任务（主任务+子任务）
         promises.push(
-          taskApi.getTasks({
-            receiverDeptId: currentDeptView.value,
-            status: 'in_progress',
-            page: 1,
-            pageSize: 1
-          }).then(res => {
-            if (res.data && res.data.total !== undefined) {
-              inProgressTotal.value = res.data.total
+          Promise.all([
+            taskApi.getTasks({
+              receiverDeptId: currentDeptView.value,
+              status: 'in_progress',
+              page: 1,
+              pageSize: 1
+            }),
+            taskApi.getInProgressTaskItems({
+              deptId: currentDeptView.value,
+              page: 1,
+              pageSize: 1
+            })
+          ]).then(([taskRes, itemRes]) => {
+            let count = 0
+            if (taskRes.data && taskRes.data.total !== undefined) {
+              count += taskRes.data.total
             }
+            if (itemRes.data && itemRes.data.total !== undefined) {
+              count += itemRes.data.total
+            }
+            inProgressTotal.value = count
           }).catch(() => {})
         )
       }
@@ -5857,14 +5869,39 @@ const loadAllTabCounts = async () => {
     )
     }
     
-    // 4. 已完成任务数量
-    promises.push(
-      taskApi.getCompletedTasks({ page: 1, pageSize: 1 }).then(res => {
-        if (res.data && res.data.total !== undefined) {
-          completedTotal.value = res.data.total
-        }
-      }).catch(() => {})
-    )
+    // 4. 已完成任务数量 - 🔥 根据部门视角正确查询
+    if (isDeptLeader && currentDeptView.value !== undefined && currentDeptType === 'receiving') {
+      // 接单部门负责人视角：查询子任务
+      promises.push(
+        taskApi.getCompletedTaskItems({ 
+          deptId: currentDeptView.value,
+          page: 1, 
+          pageSize: 1 
+        }).then(res => {
+          if (res.data && res.data.total !== undefined) {
+            completedTotal.value = res.data.total
+          }
+        }).catch(() => {})
+      )
+    } else if (currentDeptType === 'receiving' && !isDeptLeader) {
+      // 接单部门普通用户：查询自己完成的子任务
+      promises.push(
+        taskApi.getCompletedTaskItems({ page: 1, pageSize: 1 }).then(res => {
+          if (res.data && res.data.total !== undefined) {
+            completedTotal.value = res.data.total
+          }
+        }).catch(() => {})
+      )
+    } else {
+      // 需求部门或管理员：查询主任务
+      promises.push(
+        taskApi.getCompletedTasks({ page: 1, pageSize: 1 }).then(res => {
+          if (res.data && res.data.total !== undefined) {
+            completedTotal.value = res.data.total
+          }
+        }).catch(() => {})
+      )
+    }
     
     // 5. 我发起的任务数量
     promises.push(