成绩通知：仅在某门课程成绩正式发布后自动发送，按成绩单学生名单通知，不展示具体分数；发布状态与通知同一次提交。

手动发信：移除“成绩通知”选项，只能发送普通通知，原有角色与范围权限保持不变。
选课通知：管理员关闭一轮选课时，自动向每位参与学生发送一条汇总通知，包含最终选中课程及候补未成功课程；候补失效、轮次关闭和通知生成保持原子性。
关闭选课界面会明确提示发送通知，并显示实际通知人数。

src/Jiaowu.Api/Infrastructure/Scheduling/WarningCheckWorker.cs

@@ -75,11 +75,11 @@ public sealed class WarningCheckWorker(IServiceScopeFactory scopeFactory, ILogge
                 {
                     var si = await db.Students.Where(x => x.Id == w.StudentId).Select(x => new { x.UserId, x.Name, x.AdministrativeClassId }).FirstAsync(ct);
                     if (rule.NotifyStudent && si.UserId.HasValue)
-                        await NotificationService.SendAsync(db, si.UserId.Value, "学业预警", w.Detail, "/warnings", cancellationToken: ct);
+                        await NotificationService.SendAsync(db, si.UserId.Value, "学业预警", w.Detail, "/warnings", ct, NotificationCategory.Warning);
                     if (rule.NotifyCounselor)
                     {
                         var cid = await db.AdministrativeClasses.Where(c => c.Id == si.AdministrativeClassId && c.CounselorUserId != null).Select(c => c.CounselorUserId!.Value).FirstOrDefaultAsync(ct);
-                        if (cid != default) await NotificationService.SendAsync(db, cid, "学生学业预警", $"{si.Name}：{w.Detail}", "/warnings", cancellationToken: ct);
+                        if (cid != default) await NotificationService.SendAsync(db, cid, "学生学业预警", $"{si.Name}：{w.Detail}", "/warnings", ct, NotificationCategory.Warning);
                     }
                 }
             }