Improve TypeScript support

svelte.config.js

@@ -1,7 +1,12 @@
-import adapter from '@sveltejs/adapter-node';
+import adapter from '@sveltejs/adapter-auto';
+import { vitePreprocess } from '@sveltejs/kit/vite';
 
 /** @type {import('@sveltejs/kit').Config} */
 const config = {
+	// Consult https://kit.svelte.dev/docs/integrations#preprocessors
+	// for more information about preprocessors
+	preprocess: vitePreprocess(),
+
 	kit: {
 		// adapter-auto only supports some environments, see https://kit.svelte.dev/docs/adapter-auto for a list.
 		// If your environment is not supported or you settled on a specific environment, switch out the adapter.