feature: add sv-router, page structure and redirect to home from any other page

src/app/App.svelte

@@ -6,21 +6,22 @@
 /**
  * App Component
  *
- * Application entry point component. Wraps the main page route within the shared
+ * Application entry point component. Wraps the active route within the shared
  * layout shell. This is the root component mounted by the application.
  *
  * Structure:
  * - QueryProvider provides TanStack Query client for data fetching
  * - Layout provides sidebar, header/footer, and page container
- * - Page renders the current route content
+ * - Router renders the matched route component
  */
-import Page from '$routes/Page.svelte';
+import '$routes/router';
+import { Router } from 'sv-router';
 import { QueryProvider } from './providers';
 import Layout from './ui/Layout.svelte';
 </script>
 
 <QueryProvider>
     <Layout>
-        <Page />
+        <Router />
     </Layout>
 </QueryProvider>