feat(gui): 迁移图形界面库从SDL3到IUP

- 移除SDL3依赖，引入IUP图形界面库
- 更新Makefile以支持IUP编译配置
- 重构GUI模块，移除SDL相关代码
- 更新全局变量和类型定义，移除SDL依赖
- 添加IUP头文件到项目库目录
- 删除手动帧率控制(SDL_Delay)，依赖IUP事件循环
- 更新编译脚本和文档说明

libs/iup-3.31_Win64_dllw6_lib/include/iupdraw.h

@@ -0,0 +1,47 @@
+/** \file
+ * \brief Canvas Draw API
+ *
+ * See Copyright Notice in "iup.h"
+ */
+ 
+#ifndef __IUPDRAW_H 
+#define __IUPDRAW_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* all functions can be used only in IUP canvas and inside the ACTION callback */
+
+IUP_API void IupDrawBegin(Ihandle* ih);
+IUP_API void IupDrawEnd(Ihandle* ih);
+
+/* all functions can be called only between calls to Begin and End */
+
+IUP_API void IupDrawSetClipRect(Ihandle* ih, int x1, int y1, int x2, int y2);
+IUP_API void IupDrawGetClipRect(Ihandle* ih, int *x1, int *y1, int *x2, int *y2);
+IUP_API void IupDrawResetClip(Ihandle* ih);
+
+/* color controlled by the attribute DRAWCOLOR */
+/* line style or fill controlled by the attribute DRAWSTYLE */
+
+IUP_API void IupDrawParentBackground(Ihandle* ih);
+IUP_API void IupDrawLine(Ihandle* ih, int x1, int y1, int x2, int y2);
+IUP_API void IupDrawRectangle(Ihandle* ih, int x1, int y1, int x2, int y2);
+IUP_API void IupDrawArc(Ihandle* ih, int x1, int y1, int x2, int y2, double a1, double a2);
+IUP_API void IupDrawPolygon(Ihandle* ih, int* points, int count);
+IUP_API void IupDrawText(Ihandle* ih, const char* text, int len, int x, int y, int w, int h);
+IUP_API void IupDrawImage(Ihandle* ih, const char* name, int x, int y, int w, int h);
+IUP_API void IupDrawSelectRect(Ihandle* ih, int x1, int y1, int x2, int y2);
+IUP_API void IupDrawFocusRect(Ihandle* ih, int x1, int y1, int x2, int y2);
+
+IUP_API void IupDrawGetSize(Ihandle* ih, int *w, int *h);
+IUP_API void IupDrawGetTextSize(Ihandle* ih, const char* text, int len, int *w, int *h);
+IUP_API void IupDrawGetImageInfo(const char* name, int *w, int *h, int *bpp);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif