Replace selectable name sets with a country that owns names and climate presets.

Create picks a country; climate is rolled from the school seed and stored. Old Slavic saves lift as Russia.

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

src/HSchool.Content/PeopleDefs.cs

@@ -359,7 +359,10 @@ public sealed class SurnameEntry
     public CaseTable? FemaleCases { get; init; }
 }
 
-public sealed class NameSetDef : Def
+/// <summary>
+/// Nested name grammar of a <see cref="CountryDef"/>. Not a selectable catalog kind of its own.
+/// </summary>
+public sealed class NameSetDef
 {
     public string PatronymicRule { get; init; } = NameGrammar.SlavicPatronymic;
 
@@ -368,7 +371,7 @@ public sealed class NameSetDef : Def
     public string DefaultSurnameDeclension { get; init; } = NameGrammar.Ov;
 
     /// <summary>
-    /// Languages this set can speak natively. Slavic names cover Russian, Belarusian and
+    /// Languages this country can speak natively. Slavic names cover Russian, Belarusian and
     /// Ukrainian; the school picks one at create. Singular <see cref="NativeLanguage"/> is still
     /// accepted in JSONC for a one-language pack.
     /// </summary>
@@ -401,3 +404,20 @@ public sealed class NameSetDef : Def
 
     public IReadOnlyList<SurnameEntry> Surnames { get; init; } = [];
 }
+
+/// <summary>
+/// What the player picks at create: nested names plus climate-preset ids. Weather numbers live
+/// on <see cref="ClimatePresetDef"/> and stay unused until phase 32.
+/// </summary>
+public sealed class CountryDef : Def
+{
+    public IReadOnlyList<string> ClimatePresets { get; init; } = [];
+
+    public NameSetDef Names { get; init; } = new();
+}
+
+/// <summary>
+/// Outdoor climate a country may roll. Monthly temperatures land in phase 32; the id is enough
+/// to persist which preset a school was born with.
+/// </summary>
+public sealed class ClimatePresetDef : Def;