fix: hashes now return number instead of number | hash

Author: AvarianKnight

src/NativeCodeGen.Core/Generation/ITypeMapper.cs

@@ -10,7 +10,7 @@ public interface ITypeMapper
     /// <summary>
     /// Maps a C type to the target language type.
     /// </summary>
-    string MapType(TypeInfo type, bool isNotNull = false);
+    string MapType(TypeInfo type, bool isNotNull = false, bool forReturn = false);
 
     /// <summary>
     /// Gets the expression for marking a return type in native invocation.

src/NativeCodeGen.Core/Generation/RawNativeBuilder.cs

@@ -391,7 +391,7 @@ private string MapReturnType(TypeInfo type)
         if (type.Category == TypeCategory.Vector3)
             return _config.Vector3Type;
 
-        return _typeMapper.MapType(type);
+        return _typeMapper.MapType(type, forReturn: true);
     }
 
     private string MapOutputType(TypeInfo type)

src/NativeCodeGen.Core/TypeSystem/TypeMapperBase.cs

@@ -120,7 +120,7 @@ protected TypeMapperBase(LanguageConfig config)
         Config = config;
     }
 
-    public virtual string MapType(TypeInfo type, bool isNotNull = false)
+    public virtual string MapType(TypeInfo type, bool isNotNull = false, bool forReturn = false)
     {
         if (type.IsPointer)
         {
@@ -142,7 +142,8 @@ public virtual string MapType(TypeInfo type, bool isNotNull = false)
             TypeCategory.Handle => Config.UseTypedHandles && TypeInfo.IsClassHandle(type.Name)
                 ? (type.Name == "Object" ? "Prop" : type.Name)
                 : Config.NumberType,
-            TypeCategory.Hash => Config.HashType,
+            // Hash parameters accept string | number, but return type is always number
+            TypeCategory.Hash => forReturn ? Config.NumberType : Config.HashType,
             TypeCategory.String => isNotNull ? Config.StringType : Config.StringType + Config.NullableStringSuffix,
             TypeCategory.Vector2 => Config.Vector2Type,
             TypeCategory.Vector3 => Config.Vector3Type,
@@ -298,7 +299,7 @@ public virtual string BuildCombinedReturnType(TypeInfo returnType, IEnumerable<T
         // Helper to add nullable suffix for class handle return types
         string MapReturnType(TypeInfo type)
         {
-            var mapped = MapType(type);
+            var mapped = MapType(type, forReturn: true);
             // Class handle return types can be null (invalid handle returns 0)
             // Non-class handles (Prompt, ScrHandle) are just numbers
             if (type.Category == TypeCategory.Handle && Config.UseTypedHandles && TypeInfo.IsClassHandle(type.Name))