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/include/engine_api.h

@@ -19,7 +19,7 @@ extern "C" {
 // memory.asm - 对齐内存分配
 // ============================================================================
 
-#ifndef MATH_ASM_AVAILABLE
+#if !defined(MATH_ASM_AVAILABLE) || MATH_ASM_AVAILABLE == 0
 // 在 C fallback 模式下，这些函数已在 math_c_fallback.h 中定义
 // 不需要重复声明
 #else