优化：初步优化全局代码样式

docs/.vitepress/config/nav.ts

@@ -1,4 +1,4 @@
-import DefaultTheme from 'vitepress/theme'
+import type { DefaultTheme } from 'vitepress';
 
 export const nav: DefaultTheme.Config['nav'] = [
   {
@@ -37,5 +37,5 @@ export const nav: DefaultTheme.Config['nav'] = [
       { text: '关于我', link: '/about/me', activeMatch: '/about/me' }
     ],
     activeMatch: '/about/' // // 当前页面处于匹配路径下时, 对应导航菜单将突出显示
-  }
-]
+  },
+];