perf(health): 随访列表内联负责人名称 — 消除 N+1 查询

follow_up list_tasks 批量查询 users 表获取 assigned_to_name，
前端移除 doctorLabels 逐条请求缓存，直接使用后端内联字段。

apps/web/src/api/health/followUp.ts

@@ -7,6 +7,7 @@ export interface FollowUpTask {
   patient_id: string;
   assigned_to?: string;
   patient_name?: string;
+  assigned_to_name?: string;
   follow_up_type: string;
   planned_date: string;
   status: string;

apps/web/src/pages/health/FollowUpTaskList.tsx

@@ -15,7 +15,6 @@ import { PlusOutlined, EditOutlined, SwapOutlined, DeleteOutlined } from '@ant-d
 import type { ColumnsType, TablePaginationConfig } from 'antd/es/table';
 import dayjs from 'dayjs';
 import { followUpApi, type FollowUpTask, type CreateFollowUpTaskReq, type UpdateFollowUpTaskReq } from '../../api/health/followUp';
-import { getUser } from '../../api/users';
 import { StatusTag } from './components/StatusTag';
 import { PatientSelect } from './components/PatientSelect';
 import { DoctorSelect } from './components/DoctorSelect';
@@ -94,9 +93,6 @@ export default function FollowUpTaskList() {
   const [assignForm] = Form.useForm<AssignFormValues>();
   const [assignTask, setAssignTask] = useState<FollowUpTask | null>(null);
 
-  // Doctor label cache (for assignee display from users table)
-  const [doctorLabels, setDoctorLabels] = useState<Record<string, string>>({});
-
   const isDark = useThemeMode();
 
   // --- Data fetching ---
@@ -106,30 +102,12 @@ export default function FollowUpTaskList() {
       const result = await followUpApi.listTasks(params);
       setTasks(result.data);
       setTotal(result.total);
-
-      // Batch resolve assignee names (from users table, not inlined by backend)
-      const assigneeIds = [...new Set(result.data.map((t: FollowUpTask) => t.assigned_to).filter((x): x is string => !!x))];
-      const missingIds = assigneeIds.filter((id) => !doctorLabels[id]);
-      if (missingIds.length > 0) {
-        const newDoctorLabels: Record<string, string> = {};
-        await Promise.allSettled(
-          missingIds.map(async (id) => {
-            try {
-              const u = await getUser(id);
-              newDoctorLabels[id] = u.display_name || u.username;
-            } catch { /* skip */ }
-          }),
-        );
-        if (Object.keys(newDoctorLabels).length > 0) {
-          setDoctorLabels((prev) => ({ ...prev, ...newDoctorLabels }));
-        }
-      }
     } catch {
       message.error('加载随访任务失败');
     } finally {
       setLoading(false);
     }
-  }, [doctorLabels]);
+  }, []);
 
   useEffect(() => {
     fetchTasks(query);
@@ -247,9 +225,11 @@ export default function FollowUpTaskList() {
     }
   };
 
-  // Store labels from selects
+  // Store labels from selects for immediate display
   const handleDoctorLabel = (id: string, label: string) => {
-    setDoctorLabels((prev) => ({ ...prev, [id]: label }));
+    setTasks((prev) =>
+      prev.map((t) => (t.assigned_to === id ? { ...t, assigned_to_name: label } : t)),
+    );
   };
 
   // --- Columns ---
@@ -288,8 +268,8 @@ export default function FollowUpTaskList() {
       dataIndex: 'assigned_to',
       key: 'assigned_to',
       width: 140,
-      render: (id: string | undefined) =>
-        id ? doctorLabels[id] || id.slice(0, 8) : '-',
+      render: (_: unknown, record: FollowUpTask) =>
+        record.assigned_to ? record.assigned_to_name || record.assigned_to.slice(0, 8) : '-',
     },
     {
       title: '创建时间',