添加cmd

ui/slint_ui.slint

@@ -16,6 +16,7 @@ export component MainWindow inherits Window {
         Button { text: "远程桌面连接"; clicked => { root.launch_mstsc(); } }
         Button { text: "字符映射表"; clicked => { root.launch_charmap(); } }
         Button { text: "任务管理器"; clicked => { root.launch_taskmgr(); } }
+        Button { text: "CMD"; clicked => { root.launch_cmd(); } }
     }
     callback launch_powershell();
     callback launch_security_center();
@@ -25,4 +26,5 @@ export component MainWindow inherits Window {
     callback launch_mstsc();
     callback launch_charmap();
     callback launch_taskmgr();
+    callback launch_cmd();
 }