v1.1: 修复 Windows 跨平台兼容性 & 按钮高对比度配色

【跨平台修复】
- cmakegenerator.cpp: CMAKE_C_COMPILER / CMAKE_MAKE_PROGRAM 提前到 project() 之前设置，避免 CMake 在 Windows 回退 NMake
- cmakegenerator.cpp: MinGW 编译器路径下自动推导 mingw32-make.exe
- mainwindow.cpp: generateCMake() 在 Windows 下添加 -G 'MinGW Makefiles'
- mainwindow.cpp: compileProject() cmake 添加生成器参数 & mingw32-make 替代 make

【UI 改进】
- 全部操作按钮升级为 Material Design 高对比度配色（Darker 系列）
- 按钮添加圆角和内边距，提升可读性和视觉层次

【工程规范】
- 新增 .gitignore，排除编译产物 (.o / moc_*.cpp / Makefile / 二进制)
- README.md 重写，补充 Windows 编译指南和技术要点
- 需求规格说明书更新至 v1.1

src/cmakegenerator.cpp

@@ -1,5 +1,6 @@
 #include "cmakegenerator.h"
 #include <QFile>
+#include <QFileInfo>
 #include <QTextStream>
 #include <QDir>
 #include <QDateTime>
@@ -93,7 +94,36 @@ QString CMakeGenerator::generateProjectConfig(const ProjectConfig *config)
         projectName = "UntitledProject";
     }
     
-    content += "# 项目名称\n";
+    // ===== 编译器必须在 project() 之前设置，否则 CMake 会默认用 NMake =====
+    content += "# ========================================\n";
+    content += "# 编译器配置（必须在 project() 之前）\n";
+    content += "# ========================================\n\n";
+    
+    QString compilerPath = config->getCompilerPath();
+    QString assemblerPath = config->getAssemblerPath();
+    QString linkerPath = config->getLinkerPath();
+    
+    if (!compilerPath.isEmpty() && compilerPath != "gcc") {
+        content += "set(CMAKE_C_COMPILER \"" + compilerPath + "\")\n";
+        
+        // 如果编译器是 MinGW 路径，自动推导 make 程序目录
+        // 例如：C:/msys2/mingw64/bin/gcc.exe → C:/msys2/mingw64/bin/mingw32-make.exe
+        if (compilerPath.contains("mingw", Qt::CaseInsensitive)) {
+            QString makeDir = QFileInfo(compilerPath).path();  // path() 正确保留绝对路径的盘符
+            content += "set(CMAKE_MAKE_PROGRAM \"" + makeDir + "/mingw32-make.exe\")\n";
+        }
+    }
+    
+    if (!assemblerPath.isEmpty() && assemblerPath != "gcc") {
+        content += "set(CMAKE_ASM_COMPILER \"" + assemblerPath + "\")\n";
+    }
+    
+    if (!linkerPath.isEmpty() && linkerPath != "gcc" && linkerPath != compilerPath) {
+        content += "set(CMAKE_C_LINK_EXECUTABLE \"" + linkerPath + "  <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>\")\n";
+    }
+    content += "\n";
+    
+    content += "# 项目名称（编译器已设置，不再尝试检测）\n";
     content += "project(" + projectName + " C)\n\n";
     
     content += "# C 标准\n";
@@ -111,13 +141,6 @@ QString CMakeGenerator::generateProjectConfig(const ProjectConfig *config)
     content += "set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/" + outputDir + ")\n";
     content += "set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/" + outputDir + ")\n\n";
     
-    // 编译器配置
-    content += "# 编译器配置\n";
-    if (!config->getCompilerPath().isEmpty() && config->getCompilerPath() != "gcc") {
-        content += "set(CMAKE_C_COMPILER \"" + config->getCompilerPath() + "\")\n";
-    }
-    content += "\n";
-    
     return content;
 }
 
@@ -244,7 +267,7 @@ QString CMakeGenerator::generateCompilerOptions(const ProjectConfig *config)
     return content;
 }
 
-QString CMakeGenerator::generateBuildTargets(const ProjectConfig *config)
+QString CMakeGenerator::generateBuildTargets(const ProjectConfig * /*config*/)
 {
     QString content;