refactor: mover imports de estilos al contexto módulo y cargar favicon

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

apps/web/src/routes/+layout.svelte

@@ -1,8 +1,10 @@
-<script lang="ts">
-	import favicon from '$lib/assets/favicon.svg';
+<script lang="ts" context="module">
 	import '$lib/styles/tokens.css';
 	import '$lib/styles/base.css';
 </script>
+<script lang="ts">
+	import favicon from '$lib/assets/favicon.svg';
+</script>
 
 <svelte:head>
 	<link rel="icon" href={favicon} />