Review slice 9 C-D: persist clash opinions and the bully's victim.

FinishConflict never set RosterTalkDirty, so people.json skipped quarrel shifts until some other save — the same seam as the A-B talk-circle fix. First BullyVictimId write stayed in RAM only.

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

src/HSchool.Simulation/TalkCircleSystem.cs

@@ -780,11 +780,16 @@ internal static class TalkCircleSystem
     {
         var rules = school.Catalog!.BehaviorRules;
         var day = DateOnly.FromDateTime(school.Clock.Time).DayNumber;
+        var previousVictim = initiator.BullyVictimId;
         var remembered = Conflict.ResolveVictim(
             initiator,
             school.Roster!.People,
             school.Catalog,
             Seed.Mix(school.PeopleSeed, initiator.Id, day, Seed.ConflictSalt + 1));
+        if (!string.Equals(previousVictim, initiator.BullyVictimId, StringComparison.Ordinal))
+        {
+            school.RosterTalkDirty = true;
+        }
         var idle = GatherCandidates(school, initiator.Id, nodeId, requirePhone: false, studentsOnly: true)
             .Where(candidate => candidate.IsIdle)
             .Select(candidate => candidate.Id)
@@ -998,6 +1003,7 @@ internal static class TalkCircleSystem
         }
 
         school.TalkCirclesById.Remove(circle.Id);
+        school.RosterTalkDirty = true;
     }
 
     private static void ApplyClash(