Move goal weights into BehaviorDef so a pack can rebalance decisions without a fork.

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

src/HSchool.Content/PeopleDefValidator.cs

@@ -2,8 +2,9 @@ namespace HSchool.Content;
 
 internal static class PeopleDefValidator
 {
-    public static void Validate(DefCatalog catalog)
+    public static void Validate(DefCatalog catalog, IContentLog? log = null)
     {
+        log ??= NullContentLog.Instance;
         foreach (var body in catalog.BodyAttributes.Values)
         {
             ValidateBody(body);
@@ -56,7 +57,7 @@ internal static class PeopleDefValidator
 
         foreach (var behavior in catalog.Behavior.Values)
         {
-            ValidateBehavior(behavior);
+            ValidateBehavior(behavior, log);
         }
 
         if (catalog.Staffing.Values.Count(def => !def.Abstract) > 1)
@@ -476,7 +477,7 @@ internal static class PeopleDefValidator
         }
     }
 
-    private static void ValidateBehavior(BehaviorDef behavior)
+    private static void ValidateBehavior(BehaviorDef behavior, IContentLog log)
     {
         if (behavior.Abstract)
         {
@@ -503,6 +504,22 @@ internal static class PeopleDefValidator
             throw new ContentLoadException(
                 $"BehaviorDef '{behavior.DefName}' commute slack must be a non-negative range with min ≤ max.");
         }
+
+        if (behavior.DutyLessonWeight < 0f
+            || behavior.DutyTravelWeight < 0f
+            || behavior.NeedWeightAtZero < 0f
+            || behavior.LunchWeight < 0f)
+        {
+            throw new ContentLoadException($"BehaviorDef '{behavior.DefName}' goal weights cannot be negative.");
+        }
+
+        // A pack may invert this on purpose — lunch then pulls the class out of the lesson.
+        // The warning is the catch; refusing to load would make the number unmoddable.
+        if (behavior.LunchWeight > behavior.DutyLessonWeight)
+        {
+            log.Warning(
+                $"BehaviorDef '{behavior.DefName}' lunchWeight {behavior.LunchWeight} is above dutyLessonWeight {behavior.DutyLessonWeight}; pupils will leave class for lunch.");
+        }
     }
 
     private static void ValidateHoliday(HolidayDef holiday)