refactor: 移除未使用的Windows平台头文件包含

清理main.c中已不再需要的条件编译头文件引入，简化代码结构。

LICENSE

@@ -0,0 +1,21 @@
+# MIT License
+
+Copyright (c) 2026 LHY
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/main.c

@@ -8,11 +8,6 @@
 #include "registry.h"
 #include "callbacks.h"
 
-#ifdef _WIN32
-#include <windows.h>
-#include <direct.h>
-#endif
-
 // 全局控件定义
 Ihandle *dlg, *list_path, *lbl_status;
 Ihandle *btn_new, *btn_edit, *btn_browse, *btn_del, *btn_up, *btn_down;