feat: major engine overhaul - scene demo with lighting, sphere, ground

- Scene Demo: cube + sphere + ground plane with proper lighting
- Audio: XAudio2 dynamic loading + WAV playback
- Physics: expanded collision system
- Renderer: improved pipeline with materials
- UI: extended widget system
- VisualScript: enhanced serializer + block interactions
- ASM: optimized math/memory/profiling routines
- Window: mouse input + scroll support

Engine/Core/engine.h

@@ -8,6 +8,8 @@
 
 // 前向声明
 typedef struct Window Window;
+typedef struct GraphicsDevice GraphicsDevice;
+typedef struct Renderer Renderer;
 
 // 引擎配置
 typedef struct {
@@ -25,6 +27,7 @@ typedef struct {
     EngineConfig config;
     Window* window;
     void* renderer;
+    GraphicsDevice* graphics_device;
     double delta_time;
     double total_time;
     int fps;
@@ -55,8 +58,16 @@ typedef void (*EngineUpdateCallback)(Engine* engine, double delta_time);
 typedef void (*EngineRenderCallback)(Engine* engine);
 typedef void (*EngineKeyCallback)(Engine* engine, int key);
 typedef void (*EngineResizeCallback)(Engine* engine, int width, int height);
+typedef void (*EngineMouseMoveCallback)(Engine* engine, int x, int y);
+typedef void (*EngineMouseButtonCallback)(Engine* engine, int button, int pressed);
 
 void engine_set_update_callback(Engine* engine, EngineUpdateCallback callback);
 void engine_set_render_callback(Engine* engine, EngineRenderCallback callback);
 void engine_set_key_callback(Engine* engine, EngineKeyCallback callback);
 void engine_set_resize_callback(Engine* engine, EngineResizeCallback callback);
+void engine_set_mouse_move_callback(Engine* engine, EngineMouseMoveCallback callback);
+void engine_set_mouse_button_callback(Engine* engine, EngineMouseButtonCallback callback);
+
+// 子系统访问
+GraphicsDevice* engine_get_graphics_device(Engine* engine);
+Renderer* engine_get_renderer(Engine* engine);