Record slice 7 B-C recheck after later slices drifted climate and dress paths.

Adds a weather-drop walk test so a jacket is not teleported onto the body; PE change regressions already red on main stay open.

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

src/HSchool.Simulation/School.cs

@@ -422,7 +422,18 @@ public sealed class School : IDisposable
     public void SyncWeather(bool force)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
-        var next = EvaluateWeather();
+        CommitWeather(EvaluateWeather(), force);
+    }
+
+    /// <summary>
+    /// Test hook: the vanilla diurnal never crosses <c>outerBelowC</c> during a school day, so a
+    /// mid-day frost has to be injected to prove jackets walk to the locker room instead of
+    /// appearing on the body.
+    /// </summary>
+    internal void ForceWeather(OutdoorWeather weather) => CommitWeather(weather, force: true);
+
+    private void CommitWeather(OutdoorWeather next, bool force)
+    {
         if (force || next.Tenths != Weather.Tenths || next.Precipitation != Weather.Precipitation)
         {
             var before = Weather;