教学任务按 授课周数 × 周学时 = 课程总学时 双端校验，不匹配会显示具体差额并阻止保存；公共课批量生成同样校验。

排课约束增加课程、教师、学院、授课方式、场地要求、约束状态筛选，并支持批量修改当前筛选结果。
新增“非排时课程”授课方式：不进入自动排课
不占星期、节次和教室
不阻塞课表发布
允许正常选课
在班级课表和学生个人课表中单独展示

src/Jiaowu.Api/Controllers/SchedulesController.cs

@@ -232,9 +232,10 @@ public sealed class SchedulesController(
         }
 
         var requiredTasks = await db.TeachingTasks.AsNoTracking()
-            .Where(x =>
-                x.AcademicTermId == plan.AcademicTermId &&
-                x.Status == TeachingTaskStatus.Published)
+             .Where(x =>
+                 x.AcademicTermId == plan.AcademicTermId &&
+                 x.Status == TeachingTaskStatus.Published &&
+                 x.SchedulingMode == TeachingTaskSchedulingMode.Standard)
             .Select(x => new { x.Id, x.TaskNumber, x.Name, x.WeeklyHours })
             .ToListAsync(cancellationToken);
         var scheduledHours = plan.Entries
@@ -449,10 +450,12 @@ public sealed class SchedulesController(
             .ThenInclude(x => x.AdministrativeClass)
             .ThenInclude(x => x!.Students)
             .FirstOrDefaultAsync(x => x.Id == request.TeachingTaskId, cancellationToken);
-        if (task is null ||
-            task.Status != TeachingTaskStatus.Published ||
-            task.AcademicTermId != plan.AcademicTermId)
-            return ValidationProblem("只能安排同一学期内已发布的教学任务。");
+         if (task is null ||
+             task.Status != TeachingTaskStatus.Published ||
+             task.AcademicTermId != plan.AcademicTermId)
+             return ValidationProblem("只能安排同一学期内已发布的教学任务。");
+         if (task.SchedulingMode == TeachingTaskSchedulingMode.Flexible)
+             return ValidationProblem("非排时课程不进入正常课表，无需设置星期、节次或教室。");
         if (request.StartWeek < task.StartWeek || request.EndWeek > task.EndWeek)
             return ValidationProblem("排课周次必须位于教学任务的授课周次内。");