fix: refactor notification display logic and add format function

apps/server/src/classes/classes.controller.ts

@@ -29,6 +29,7 @@ import { extractRequestInfo } from '../common/request-utils';
 import { RequirePermission } from '../auth/decorators/permission.decorator';
 import { NotificationsService } from '../notifications/notifications.service';
 import { NotificationType } from '../entities/notification.entity';
+import { TeacherRoleType } from '../entities';
 import * as ExcelJS from 'exceljs';
 import { AuthorizationService, CaslAction, SubjectName, AuthenticatedUser } from '../authorization';
 
@@ -36,6 +37,13 @@ interface AuthenticatedRequest {
   user: AuthenticatedUser;
 }
 
+const teacherRoleLabels: Record<string, string> = {
+  [TeacherRoleType.SUBJECT_TEACHER]: '任课老师',
+  [TeacherRoleType.HEAD_TEACHER]: '班主任',
+  [TeacherRoleType.LIFE_TEACHER]: '生活老师',
+  [TeacherRoleType.ACADEMIC_TEACHER]: '学服老师',
+};
+
 @UseGuards(JwtAuthGuard)
 @Controller('classes')
 export class ClassesController {
@@ -302,7 +310,7 @@ export class ClassesController {
         recipientIds: [dto.userId],
         type: NotificationType.CLASS_CHANGE,
         title: '班级分配',
-        content: `您已被分配到班级担任${dto.roleType}角色`,
+        content: `您已被分配到班级担任${teacherRoleLabels[dto.roleType] ?? dto.roleType}角色`,
       });
     } catch {}
     return result;