实验课现在直接进入普通排课流程，不再要求先到实验排课模块逐个安排。

普通“添加排课”新增“理论课 / 实验课”类型。
自动排课会分别补足理论学时和实验学时。
实验课只能安排到实验室、实训室、机房、语音室等场地。
发布课表时分别校验理论、实验学时；任一未排足都不能发布。
普通课表及 Excel 导出会标注“实验课”。
历史排课保持不变，迁移后默认识别为理论课；后续新建或修订版本时再补充实验课。

src/Jiaowu.Api/Infrastructure/Teaching/TeachingTaskHours.cs

@@ -16,10 +16,35 @@ public static class TeachingTaskHours
     public static int TargetHours(
         Course course,
         TeachingTaskSchedulingMode schedulingMode) =>
-        schedulingMode == TeachingTaskSchedulingMode.Flexible
-            ? course.TotalHours
+        course.TotalHours;
+
+    public static int TargetHours(Course course, ScheduleEntryKind kind) =>
+        kind == ScheduleEntryKind.Experiment
+            ? Math.Max(0, course.PracticeHours)
             : RegularScheduleHours(course);
 
+    public static int ScheduledHours(ScheduleEntry entry) =>
+        ScheduledHours(
+            entry.StartWeek,
+            entry.EndWeek,
+            entry.WeekPattern,
+            entry.PeriodCount);
+
+    public static int ScheduledHours(
+        int startWeek,
+        int endWeek,
+        WeekPattern weekPattern,
+        int periodCount)
+    {
+        if (endWeek < startWeek || periodCount <= 0) return 0;
+        var occurrences = Enumerable.Range(startWeek, endWeek - startWeek + 1)
+            .Count(week =>
+                weekPattern == WeekPattern.All ||
+                weekPattern == WeekPattern.Odd && week % 2 == 1 ||
+                weekPattern == WeekPattern.Even && week % 2 == 0);
+        return occurrences * periodCount;
+    }
+
     public static bool TryResolveRegularWeeklyHours(
         Course course,
         int startWeek,
@@ -62,14 +87,8 @@ public static class TeachingTaskHours
 
         if (schedulingMode == TeachingTaskSchedulingMode.Standard)
         {
-            if (targetHours == 0)
-            {
-                return $"课程“{course.Name}”的 {course.TotalHours} 学时均为实践学时，" +
-                       "无需进入普通课表；请将授课方式设为“非排时课程”，并在实验管理中安排。";
-            }
-
             return $"课程“{course.Name}”总学时为 {course.TotalHours}，其中实践学时 " +
-                   $"{course.PracticeHours}，普通课表应安排 {targetHours} 学时；当前第 " +
+                   $"{course.PracticeHours}；理论课和实验课均应进入课表。当前第 " +
                    $"{startWeek}—{endWeek} 周、每周 {weeklyHours} 学时，共 " +
                    $"{plannedHours} 学时。请调整授课周次或周学时。";
         }