fix(editor): MonacoEditor 容器改为 border-box，消除编辑器下方横向滚动条

src/components/MonacoEditor.vue

@@ -89,6 +89,7 @@ onBeforeUnmount(() => {
 
 <style scoped>
 .monaco-editor {
+  box-sizing: border-box;
   width: 100%;
   border: 1px solid var(--el-border-color);
   border-radius: 4px;