Explicitely define server load and action types

web-app/svelte.config.ts

@@ -1,8 +1,8 @@
 import adapter from "@sveltejs/adapter-node";
 import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
+import { Config } from "@sveltejs/kit";
 
-/** @type {import('@sveltejs/kit').Config} */
-const config = {
+const config: Config = {
   // Consult https://kit.svelte.dev/docs/integrations#preprocessors
   // for more information about preprocessors
   preprocess: vitePreprocess(),