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/Domain/Academic/TeachingTaskEntities.cs

@@ -14,6 +14,8 @@ public sealed class TeachingTask : EntityBase
     public int StartWeek { get; set; } = 1;
     public int EndWeek { get; set; } = 16;
     public int WeeklyHours { get; set; } = 2;
+    public TeachingTaskSchedulingMode SchedulingMode { get; set; } =
+        TeachingTaskSchedulingMode.Standard;
     public TeachingTaskStatus Status { get; set; } = TeachingTaskStatus.Draft;
     public string? GenerationBatchCode { get; set; }
     public string? Notes { get; set; }
@@ -63,6 +65,12 @@ public enum TeachingTaskStatus
     Closed = 3
 }
 
+public enum TeachingTaskSchedulingMode
+{
+    Standard = 1,
+    Flexible = 2
+}
+
 public enum TeacherCourseApplicationStatus
 {
     Pending = 1,