修复教师实验管理页的可见性问题

src/Jiaowu.Api/Controllers/ExperimentsController.cs

@@ -196,12 +196,11 @@ public sealed class ExperimentsController(
         int page = 1,
         int pageSize = 20)
     {
+        // 项目列表按任课教学任务授权。场次的名单、取消和代选仍由
+        // CanManageSession 限制到已绑定的指导教师，不能以此反向过滤项目：
+        // 草稿尚未安排场次，集中安排项目也没有独立的场次指导教师绑定。
         var source = ScopedProjects().AsNoTracking();
         var scope = currentUserDataScope.Current;
-        if (scope.Scope == DataScope.Self && scope.IsInRole(SystemRoles.Teacher))
-            source = source.Where(x => x.Sessions.Any(session =>
-                session.Instructors.Any(instructor =>
-                    instructor.Teacher!.UserId == scope.UserId)));
         if (academicTermId.HasValue)
             source = source.Where(x =>
                 x.TeachingTask!.AcademicTermId == academicTermId);