fix: image preview element styling issue

src/lib/components/common/ImagePreview.svelte

@@ -7,6 +7,8 @@
 
 	let mounted = false;
 
+	let previewElement = null;
+
 	const downloadImage = (url, filename) => {
 		fetch(url)
 			.then((response) => response.blob())
@@ -34,22 +36,23 @@
 		mounted = true;
 	});
 
-	$: if (mounted) {
-		if (show) {
+	$: if (show && previewElement) {
+		document.body.appendChild(previewElement);
 		window.addEventListener('keydown', handleKeyDown);
 		document.body.style.overflow = 'hidden';
-		} else {
+	} else if (previewElement) {
 		window.removeEventListener('keydown', handleKeyDown);
+		document.body.removeChild(previewElement);
 		document.body.style.overflow = 'unset';
 	}
-	}
 </script>
 
 {#if show}
 	<!-- svelte-ignore a11y-click-events-have-key-events -->
 	<!-- svelte-ignore a11y-no-static-element-interactions -->
 	<div
-		class="fixed top-0 right-0 left-0 bottom-0 bg-black text-white w-full min-h-screen h-screen flex justify-center z-50 overflow-hidden overscroll-contain"
+		bind:this={previewElement}
+		class="modal fixed top-0 right-0 left-0 bottom-0 bg-black text-white w-full min-h-screen h-screen flex justify-center z-[9999] overflow-hidden overscroll-contain"
 	>
 		<div class=" absolute left-0 w-full flex justify-between">
 			<div>