Add lesson whispers, teacher catch chance, and after-bell teacher talk.

Whispering cuts lesson skill gain from BehaviorDef; a teacher in the room may interrupt into a discipline circle, and pedagogy scales the pupil's opinion of the teacher.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/HSchool.Simulation/LessonLearningSystem.cs

@@ -57,7 +57,12 @@ internal static class LessonLearningSystem
             in People,
             (ref PersonIdentity identity, ref PersonSkills skills, ref PersonTraits traits, ref PersonNeeds needs, ref PersonRoles roles, ref Presence presence, ref PersonActivity activity) =>
             {
-                if (activity.IsActive || !IsStanding(presence))
+                if (!IsStanding(presence))
+                {
+                    return;
+                }
+
+                if (activity.IsActive && !TalkActions.IsWhisper(activity.ActionId))
                 {
                     return;
                 }
@@ -98,6 +103,8 @@ internal static class LessonLearningSystem
                     school.TryLogLessonOnce(personId, PersonLogTypes.LessonNoTextbook, lesson.Subject);
                 }
 
+                textbookFactor *= TalkCircles.LessonWhisperFactor(activity.ActionId, rules);
+
                 IReadOnlyDictionary<string, float> taught = teacherSkills.TryGetValue(lesson.TeacherId, out var found)
                     ? found
                     : new Dictionary<string, float>(StringComparer.Ordinal);