editor: centralize engine runtime access

tests/UI/Editor/unit/test_hierarchy_scene_binding.cpp

@@ -63,7 +63,9 @@ private:
 };
 
 std::unique_ptr<EditorSceneBackend> CreateTestSceneBackend() {
-    return CreateEngineEditorSceneBackend();
+    return CreateEngineEditorSceneBackend(
+        SceneManager::Get(),
+        ::XCEngine::Resources::ResourceManager::Get());
 }
 
 TEST(HierarchySceneBindingTests, BuildFromSceneUsesRealGameObjectIds) {

tests/UI/Editor/unit/test_inspector_presentation.cpp

@@ -89,7 +89,9 @@ void SaveMainScene(const TemporaryProjectRoot& projectRoot) {
 }
 
 void BindEngineSceneBackend(EditorSceneRuntime& runtime) {
-    runtime.SetBackend(CreateEngineEditorSceneBackend());
+    runtime.SetBackend(CreateEngineEditorSceneBackend(
+        SceneManager::Get(),
+        ::XCEngine::Resources::ResourceManager::Get()));
 }
 
 const UIEditorPropertyGridSection* FindSection(

tests/UI/Editor/unit/test_scene_viewport_runtime.cpp

@@ -108,7 +108,9 @@ void SaveMainScene(const TemporaryProjectRoot& projectRoot, const Math::Vector3&
 }
 
 void BindEngineSceneBackend(EditorSceneRuntime& runtime) {
-    runtime.SetBackend(CreateEngineEditorSceneBackend());
+    runtime.SetBackend(CreateEngineEditorSceneBackend(
+        SceneManager::Get(),
+        ::XCEngine::Resources::ResourceManager::Get()));
 }
 
 UIInputEvent MakePointerEvent(