test: add mvp verification plan

apps/web/src/main.ts

@@ -1,5 +1,6 @@
 import './index.css';
 import App from './app/App.svelte';
+import { mount } from 'svelte';
 
 const target = document.getElementById('app');
 
@@ -7,4 +8,4 @@ if (!target) {
   throw new Error('Missing #app mount target');
 }
 
-new App({ target });
+mount(App, { target });