Sync from upstream llama.cpp repository

tools/server/webui/src/lib/components/app/dialogs/DialogChatAttachmentPreview.svelte

@@ -0,0 +1,67 @@
+<script lang="ts">
+	import * as Dialog from '$lib/components/ui/dialog';
+	import { ChatAttachmentPreview } from '$lib/components/app';
+	import { formatFileSize } from '$lib/utils';
+
+	interface Props {
+		open: boolean;
+		onOpenChange?: (open: boolean) => void;
+		// Either an uploaded file or a stored attachment
+		uploadedFile?: ChatUploadedFile;
+		attachment?: DatabaseMessageExtra;
+		// For uploaded files
+		preview?: string;
+		name?: string;
+		size?: number;
+		textContent?: string;
+		// For vision modality check
+		activeModelId?: string;
+	}
+
+	let {
+		open = $bindable(),
+		onOpenChange,
+		uploadedFile,
+		attachment,
+		preview,
+		name,
+		size,
+		textContent,
+		activeModelId
+	}: Props = $props();
+
+	let chatAttachmentPreviewRef: ChatAttachmentPreview | undefined = $state();
+
+	let displayName = $derived(uploadedFile?.name || attachment?.name || name || 'Unknown File');
+
+	let displaySize = $derived(uploadedFile?.size || size);
+
+	$effect(() => {
+		if (open && chatAttachmentPreviewRef) {
+			chatAttachmentPreviewRef.reset();
+		}
+	});
+</script>
+
+<Dialog.Root bind:open {onOpenChange}>
+	<Dialog.Content class="grid max-h-[90vh] max-w-5xl overflow-hidden sm:w-auto sm:max-w-6xl">
+		<Dialog.Header>
+			<Dialog.Title class="pr-8">{displayName}</Dialog.Title>
+			<Dialog.Description>
+				{#if displaySize}
+					{formatFileSize(displaySize)}
+				{/if}
+			</Dialog.Description>
+		</Dialog.Header>
+
+		<ChatAttachmentPreview
+			bind:this={chatAttachmentPreviewRef}
+			{uploadedFile}
+			{attachment}
+			{preview}
+			name={displayName}
+			{textContent}
+			{activeModelId}
+		/>
+	</Dialog.Content>
+</Dialog.Root>