feat: add mesh component editors and scene hierarchy serialization

engine/src/Components/GameObject.cpp

@@ -30,7 +30,6 @@ GameObject::GameObject(const std::string& name)
 }
 
 GameObject::~GameObject() {
-    GetGlobalRegistry().erase(m_id);
     if (m_transform) {
         delete m_transform;
         m_transform = nullptr;
@@ -39,8 +38,10 @@ GameObject::~GameObject() {
 }
 
 std::unordered_map<GameObject::ID, GameObject*>& GameObject::GetGlobalRegistry() {
-    static std::unordered_map<ID, GameObject*> registry;
-    return registry;
+    // Keep the registry alive until process teardown to avoid static destruction
+    // order issues when GameObject instances are released from other singletons.
+    static auto* registry = new std::unordered_map<ID, GameObject*>();
+    return *registry;
 }
 
 void GameObject::NotifyComponentsBecameActive() {

engine/src/Scene/Scene.cpp

@@ -108,6 +108,10 @@ Scene::Scene(const std::string& name)
 }
 
 Scene::~Scene() {
+    auto& registry = GameObject::GetGlobalRegistry();
+    for (const auto& entry : m_gameObjects) {
+        registry.erase(entry.first);
+    }
     m_gameObjects.clear();
 }
 
@@ -156,6 +160,7 @@ void Scene::DestroyGameObject(GameObject* gameObject) {
     gameObject->OnDestroy();
     
     m_gameObjectIDs.erase(gameObject->m_id);
+    GameObject::GetGlobalRegistry().erase(gameObject->m_id);
     m_gameObjects.erase(gameObject->m_id);
 }
 
@@ -244,6 +249,10 @@ void Scene::LateUpdate(float deltaTime) {
 }
 
 void Scene::DeserializeFromString(const std::string& data) {
+    auto& registry = GameObject::GetGlobalRegistry();
+    for (const auto& entry : m_gameObjects) {
+        registry.erase(entry.first);
+    }
     m_gameObjects.clear();
     m_rootGameObjects.clear();
     m_gameObjectIDs.clear();