refactor(title): la 3D és l'única — elimina backup 2D i renomena als noms canònics

source/core/system/director.cpp

@@ -24,7 +24,6 @@
 #include "game/scenes/game_scene.hpp"
 #include "game/scenes/logo_scene.hpp"
 #include "game/scenes/title_scene.hpp"
-#include "game/scenes/title_scene_3d.hpp"
 #include "global_events.hpp"
 #include "project.h"
 #include "scene.hpp"
@@ -292,17 +291,8 @@ auto Director::buildScene(SceneType type, SDLManager& sdl, SceneContext& context
     switch (type) {
         case SceneType::LOGO:
             return std::make_unique<LogoScene>(sdl, context);
-        case SceneType::TITLE: {
-            // Env var ORNI_TITLE_3D=1 redirigeix la TITLE clàssica cap a la
-            // variant 3D real en proves; en qualsevol altre cas, la 2D.
-            const char* env = std::getenv("ORNI_TITLE_3D");
-            if (env != nullptr && env[0] == '1' && env[1] == '\0') {
-                return std::make_unique<TitleScene3D>(sdl, context);
-            }
+        case SceneType::TITLE:
             return std::make_unique<TitleScene>(sdl, context);
-        }
-        case SceneType::TITLE_3D:
-            return std::make_unique<TitleScene3D>(sdl, context);
         case SceneType::GAME:
             return std::make_unique<GameScene>(sdl, context);
         case SceneType::EXIT: