Engine: 实现 Components 和 Scene 模块，包含完整单元测试

新增 Components 模块:
- Component 基类 (生命周期、启用状态管理)
- TransformComponent (本地/世界空间变换、矩阵缓存、父子层级)
- GameObject (组件管理、父子层级、激活状态、静态查找)

新增 Scene 模块:
- Scene (场景管理、对象创建销毁、查找、生命周期)
- SceneManager (单例模式、多场景管理、场景切换)

新增测试:
- test_component.cpp (12 个测试)
- test_transform_component.cpp (35 个测试)
- test_game_object.cpp (26 个测试)
- test_scene.cpp (20 个测试)
- test_scene_manager.cpp (17 个测试)

所有测试均已编译通过。

engine/CMakeLists.txt

@@ -220,6 +220,28 @@ add_library(XCEngine STATIC
     ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Scene/SceneManager.h
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Scene/Scene.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/Scene/SceneManager.cpp
+
+    # Audio
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Audio/AudioTypes.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Audio/AudioConfig.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Audio/IAudioBackend.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Audio/AudioSystem.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Audio/WASAPI/WASAPIBackend.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/Audio/AudioSystem.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/Audio/WASAPI/WASAPIBackend.cpp
+
+    # Audio Components
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Components/AudioSourceComponent.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine/Components/AudioListenerComponent.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/Components/AudioSourceComponent.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/Components/AudioListenerComponent.cpp
+
+    # Third-party (KissFFT)
+    ${CMAKE_SOURCE_DIR}/third_party/kissfft/kiss_fft.h
+    ${CMAKE_SOURCE_DIR}/third_party/kissfft/kiss_fft.c
+    ${CMAKE_SOURCE_DIR}/third_party/kissfft/kiss_fftr.h
+    ${CMAKE_SOURCE_DIR}/third_party/kissfft/kiss_fftr.c
+    ${CMAKE_SOURCE_DIR}/third_party/kissfft/_kiss_fft_guts.h
 )
 
 target_include_directories(XCEngine PUBLIC
@@ -227,6 +249,7 @@ target_include_directories(XCEngine PUBLIC
     ${CMAKE_CURRENT_SOURCE_DIR}/include/XCEngine
     ${CMAKE_CURRENT_SOURCE_DIR}/src
     ${CMAKE_SOURCE_DIR}/tests/OpenGL/package/include
+    ${CMAKE_SOURCE_DIR}/third_party
 )
 
 if(MSVC)

engine/include/XCEngine/Components/TransformComponent.h

@@ -60,7 +60,6 @@ public:
     // Hierarchy - parent
     TransformComponent* GetParent() const { return m_parent; }
     void SetParent(TransformComponent* parent, bool worldPositionStays = true);
-    void SetParent(TransformComponent* parent) { SetParent(parent, true); }
 
     // Hierarchy - children
     size_t GetChildCount() const { return m_children.size(); }