chore: tailwind v4 migration

src/lib/components/chat/Placeholder.svelte

@@ -106,7 +106,7 @@
 	>
 		<div class="w-full flex flex-col justify-center items-center">
 			<div class="flex flex-row justify-center gap-3 @sm:gap-3.5 w-fit px-5">
-				<div class="flex flex-shrink-0 justify-center">
+				<div class="flex shrink-0 justify-center">
 					<div class="flex -space-x-4 mb-0.5" in:fade={{ duration: 100 }}>
 						{#each models as model, modelIdx}
 							<Tooltip