chore: tailwind v4 migration

src/lib/components/chat/MessageInput/FilesOverlay.svelte

@@ -19,12 +19,12 @@
 		bind:this={overlayElement}
 		class="fixed {$showSidebar
 			? 'left-0 md:left-[260px] md:w-[calc(100%-260px)]'
-			: 'left-0'}  fixed top-0 right-0 bottom-0 w-full h-full flex z-[9999] touch-none pointer-events-none"
+			: 'left-0'}  fixed top-0 right-0 bottom-0 w-full h-full flex z-9999 touch-none pointer-events-none"
 		id="dropzone"
 		role="region"
 		aria-label="Drag and Drop Container"
 	>
-		<div class="absolute w-full h-full backdrop-blur bg-gray-800/40 flex justify-center">
+		<div class="absolute w-full h-full backdrop-blur-sm bg-gray-800/40 flex justify-center">
 			<div class="m-auto pt-64 flex flex-col justify-center">
 				<div class="max-w-md">
 					<AddFilesPlaceholder />