text input: default to full width

src/lib/TextInput.svelte

@@ -34,7 +34,7 @@
 	let valid: boolean = $state(true);
 </script>
 
-<div class={classValue}>
+<div class={['w-full', classValue]}>
 	{#if label}
 		<Label for={id}>{label}</Label>
 	{/if}