Add rain and snow minutes to the morning commute.

Day plans take a precomputed extra; Ai does not know precipitation.

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

src/HSchool.Simulation/OutdoorWeather.cs

@@ -1,3 +1,5 @@
+using HSchool.Content;
+
 namespace HSchool.Simulation;
 
 /// <summary>Street precipitation. Below 0 °C the same roll is snow, above it is rain.</summary>
@@ -17,4 +19,23 @@ public readonly record struct OutdoorWeather(float TemperatureC, Precipitation P
         Math.Round(TemperatureC * 10d, MidpointRounding.AwayFromZero),
         short.MinValue,
         short.MaxValue);
+
+    /// <summary>
+    /// Extra commute minutes for today's street. Ai receives this number; it does not see
+    /// precipitation. A pack without the fields adds nothing.
+    /// </summary>
+    public int ExtraCommuteMinutes(BehaviorDef? rules)
+    {
+        if (rules is null)
+        {
+            return 0;
+        }
+
+        return Precipitation switch
+        {
+            Precipitation.Rain => rules.CommuteRainMinutes,
+            Precipitation.Snow => rules.CommuteSnowMinutes,
+            _ => 0,
+        };
+    }
 }

src/HSchool.Simulation/PresenceSystem.cs

@@ -217,7 +217,8 @@ internal static class PresenceSystem
                 school.Timetable,
                 school.Clock.Time,
                 school.SchoolWeekDays,
-                school.PeopleSeed);
+                school.PeopleSeed,
+                school.Weather.ExtraCommuteMinutes(school.Catalog!.BehaviorRules));
         }
 
         school.DecisionQueue.Clear();