Enable prerendering to fix 404 on root page

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: milanofthe

src/routes/+layout.ts

@@ -0,0 +1 @@
+export const prerender = true;

svelte.config.js

@@ -19,7 +19,8 @@ const config = {
 		},
 		prerender: {
 			handleHttpError: 'warn',
-			handleMissingId: 'warn'
+			handleMissingId: 'warn',
+			handleUnseenRoutes: 'warn'
 		}
 	}
 };