refactor: add typings

astro.config.ts

@@ -9,6 +9,7 @@ import mdx from '@astrojs/mdx';
 import partytown from '@astrojs/partytown';
 import icon from 'astro-icon';
 import compress from 'astro-compress';
+import type { AstroIntegration } from 'astro';
 
 import astrowind from './vendor/integration';
 
@@ -21,7 +22,7 @@ import {
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const hasExternalScripts = false;
-const whenExternalScripts = (items = []) =>
+const whenExternalScripts = (items: (() => AstroIntegration) | (() => AstroIntegration)[] = []) =>
   hasExternalScripts ? (Array.isArray(items) ? items.map((item) => item()) : [items()]) : [];
 
 export default defineConfig({