Refactor environment variable definitions and update internal server options. Removed deprecated route metadata file, adjusted service worker options to null, and improved layout styles in the login page for better responsiveness.

src/routes/login/+page.svelte

@@ -14,8 +14,8 @@
   const error = $derived(data.form?.error);
 </script>
 
-<div class="app-shell max-w-sm mx-auto w-full">
-  <Card.Root>
+<div class="flex min-h-0 flex-1 flex-col items-center justify-center p-4">
+  <Card.Root class="w-full max-w-sm">
     <Card.Header>
       <Card.Title>Sign in</Card.Title>
       <Card.Description>Enter your email and password.</Card.Description>