Improved file naming & structure for UI components (#17405)

* refactor: Component iles naming & structure

* chore: update webui build output

* refactor: Dialog titles + components namig

* chore: update webui build output

* refactor: Imports

* chore: update webui build output

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

@@ -0,0 +1,68 @@
+<script lang="ts">
+	import * as Dialog from '$lib/components/ui/dialog';
+	import { ConversationSelection } from '$lib/components/app';
+
+	interface Props {
+		conversations: DatabaseConversation[];
+		messageCountMap?: Map<string, number>;
+		mode: 'export' | 'import';
+		onCancel: () => void;
+		onConfirm: (selectedConversations: DatabaseConversation[]) => void;
+		open?: boolean;
+	}
+
+	let {
+		conversations,
+		messageCountMap = new Map(),
+		mode,
+		onCancel,
+		onConfirm,
+		open = $bindable(false)
+	}: Props = $props();
+
+	let conversationSelectionRef: ConversationSelection | undefined = $state();
+
+	let previousOpen = $state(false);
+
+	$effect(() => {
+		if (open && !previousOpen && conversationSelectionRef) {
+			conversationSelectionRef.reset();
+		} else if (!open && previousOpen) {
+			onCancel();
+		}
+
+		previousOpen = open;
+	});
+</script>
+
+<Dialog.Root bind:open>
+	<Dialog.Portal>
+		<Dialog.Overlay class="z-[1000000]" />
+
+		<Dialog.Content class="z-[1000001] max-w-2xl">
+			<Dialog.Header>
+				<Dialog.Title>
+					Select Conversations to {mode === 'export' ? 'Export' : 'Import'}
+				</Dialog.Title>
+				<Dialog.Description>
+					{#if mode === 'export'}
+						Choose which conversations you want to export. Selected conversations will be downloaded
+						as a JSON file.
+					{:else}
+						Choose which conversations you want to import. Selected conversations will be merged
+						with your existing conversations.
+					{/if}
+				</Dialog.Description>
+			</Dialog.Header>
+
+			<ConversationSelection
+				bind:this={conversationSelectionRef}
+				{conversations}
+				{messageCountMap}
+				{mode}
+				{onCancel}
+				{onConfirm}
+			/>
+		</Dialog.Content>
+	</Dialog.Portal>
+</Dialog.Root>