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/iup_plot.h

@@ -0,0 +1,70 @@
+/** \file
+ * \brief Plot component for Iup.
+ *
+ * See Copyright Notice in "iup.h"
+ */
+ 
+#ifndef __IUP_PLOT_H 
+#define __IUP_PLOT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Initialize IupPlot widget class */
+void IupPlotOpen(void);
+
+/* Create an IupPlot widget instance */
+Ihandle* IupPlot(void);
+
+/***********************************************/
+/*           Additional API                    */
+
+void IupPlotBegin(Ihandle *ih, int strXdata);
+void IupPlotAdd(Ihandle *ih, double x, double y);
+void IupPlotAddStr(Ihandle *ih, const char* x, double y);
+void IupPlotAddSegment(Ihandle *ih, double x, double y);
+int  IupPlotEnd(Ihandle *ih);
+
+int  IupPlotLoadData(Ihandle* ih, const char* filename, int strXdata);
+
+/* available only when linking with "iupluaplot" */
+int IupPlotSetFormula(Ihandle* ih, int sample_count, const char* formula, const char* init);
+
+void IupPlotInsert(Ihandle *ih, int ds_index, int sample_index, double x, double y);
+void IupPlotInsertStr(Ihandle *ih, int ds_index, int sample_index, const char* x, double y);
+void IupPlotInsertSegment(Ihandle *ih, int ds_index, int sample_index, double x, double y);
+
+void IupPlotInsertStrSamples(Ihandle* ih, int ds_index, int sample_index, const char** x, double* y, int count);
+void IupPlotInsertSamples(Ihandle* ih, int ds_index, int sample_index, double *x, double *y, int count);
+
+void IupPlotAddSamples(Ihandle* ih, int ds_index, double *x, double *y, int count);
+void IupPlotAddStrSamples(Ihandle* ih, int ds_index, const char** x, double* y, int count);
+
+void IupPlotGetSample(Ihandle* ih, int ds_index, int sample_index, double *x, double *y);
+void IupPlotGetSampleStr(Ihandle* ih, int ds_index, int sample_index, const char* *x, double *y);
+int  IupPlotGetSampleSelection(Ihandle* ih, int ds_index, int sample_index);
+double IupPlotGetSampleExtra(Ihandle* ih, int ds_index, int sample_index);
+void IupPlotSetSample(Ihandle* ih, int ds_index, int sample_index, double x, double y);
+void IupPlotSetSampleStr(Ihandle* ih, int ds_index, int sample_index, const char* x, double y);
+void IupPlotSetSampleSelection(Ihandle* ih, int ds_index, int sample_index, int selected);
+void IupPlotSetSampleExtra(Ihandle* ih, int ds_index, int sample_index, double extra);
+
+void IupPlotTransform(Ihandle* ih, double x, double y, double *cnv_x, double *cnv_y);
+void IupPlotTransformTo(Ihandle* ih, double cnv_x, double cnv_y, double *x, double *y);
+
+int  IupPlotFindSample(Ihandle* ih, double cnv_x, double cnv_y, int *ds_index, int *sample_index);
+int  IupPlotFindSegment(Ihandle* ih, double cnv_x, double cnv_y, int *ds_index, int *sample_index1, int *sample_index2);
+
+struct _cdCanvas;
+
+void IupPlotPaintTo(Ihandle *ih, struct _cdCanvas* cnv);
+
+/***********************************************/
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif