Keep defender-victim opinions as allies after a quarrel.

The clash penalty applied to every pair except defender looking at the victim, so the person being helped disliked the defender like a second enemy.

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

tests/HSchool.People.Tests/AffinityTests.cs

@@ -122,6 +122,30 @@ public class AffinityTests
         Assert.True((OpinionStore.Get(pupil, teacher.Id) ?? 0) < before);
     }
 
+    [Fact]
+    public void RosterJson_RoundTripsCrushesAndPartner()
+    {
+        var catalog = Fixtures.RomanceCatalog();
+        var left = Staff("s1", female: false, "Bisexual");
+        var right = Staff("s2", female: true, "Bisexual");
+        SetOpinion(left, right.Id, 80);
+        SetOpinion(right, left.Id, 80);
+        var roster = new Roster([left, right], [], []);
+        Affinity.Refresh(catalog, roster, AsOf);
+        Assert.Equal(right.Id, left.Bonds!.PartnerId);
+
+        var json = RosterJson.Serialize(RosterDocument.From(1, roster));
+        Assert.Contains("\"partnerId\"", json, StringComparison.Ordinal);
+        Assert.Contains("\"crushes\"", json, StringComparison.Ordinal);
+        var loaded = RosterJson.Parse(json).ToRoster();
+        var loadedLeft = loaded.People.First(person => person.Id.Equals(left.Id, StringComparison.Ordinal));
+        var loadedRight = loaded.People.First(person => person.Id.Equals(right.Id, StringComparison.Ordinal));
+        Assert.Equal(right.Id, loadedLeft.Bonds?.PartnerId);
+        Assert.Equal(left.Id, loadedRight.Bonds?.PartnerId);
+        Assert.Contains(right.Id, loadedLeft.Bonds!.Crushes);
+        Assert.Contains(left.Id, loadedRight.Bonds!.Crushes);
+    }
+
     [Fact]
     public void AdjacentYearStudents_CanHaveSympathy()
     {