Sample outdoor weather from the climate preset so people can freeze and the clock can show it.

Protocol v8 adds tenths of a °C and precipitation to the clock frame; warmth drains from insulation versus place temperature.

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

src/HSchool.Protocol/Messages.cs

@@ -33,6 +33,8 @@ public readonly record struct ServerPongMessage(long ClientTimeMs, uint ServerTi
 /// interpreted as UTC — the game calendar has no time zone.
 /// <paramref name="SkipAllowed"/> is the server's verdict; the client must not recompute it.
 /// <paramref name="SkipTargetUnixMs"/> is 0 when skip is refused.
+/// <paramref name="TemperatureTenths"/> is outdoor °C × 10. <paramref name="Precipitation"/> is
+/// <see cref="PrecipitationKind"/>.
 /// </summary>
 public readonly record struct ServerClockMessage(
     int SchoolId,
@@ -40,7 +42,17 @@ public readonly record struct ServerClockMessage(
     bool Running,
     byte SpeedIndex,
     bool SkipAllowed = false,
-    long SkipTargetUnixMs = 0);
+    long SkipTargetUnixMs = 0,
+    short TemperatureTenths = 0,
+    byte Precipitation = 0);
+
+/// <summary>Outdoor precipitation on the clock frame. Below 0 °C the same weather roll is snow.</summary>
+public static class PrecipitationKind
+{
+    public const byte None = 0;
+    public const byte Rain = 1;
+    public const byte Snow = 2;
+}
 
 /// <summary>The open school no longer exists (deleted from another tab); the client returns to the menu.</summary>
 public readonly record struct ServerSchoolGoneMessage(int SchoolId);