enh: temp chat

deprecates chat history setting and introduces temp chat from model selector

src/lib/components/chat/ModelSelector/Selector.svelte

@@ -12,12 +12,14 @@
 
 	import { deleteModel, getOllamaVersion, pullModel } from '$lib/apis/ollama';
 
-	import { user, MODEL_DOWNLOAD_POOL, models, mobile } from '$lib/stores';
+	import { user, MODEL_DOWNLOAD_POOL, models, mobile, temporaryChatEnabled } from '$lib/stores';
 	import { toast } from 'svelte-sonner';
 	import { capitalizeFirstLetter, sanitizeResponseContent, splitStream } from '$lib/utils';
 	import { getModels } from '$lib/apis';
 
 	import Tooltip from '$lib/components/common/Tooltip.svelte';
+	import Switch from '$lib/components/common/Switch.svelte';
+	import ChatBubbleOval from '$lib/components/icons/ChatBubbleOval.svelte';
 
 	const i18n = getContext('i18n');
 	const dispatch = createEventDispatcher();
@@ -27,6 +29,8 @@
 	export let searchEnabled = true;
 	export let searchPlaceholder = $i18n.t('Search a model');
 
+	export let showTemporaryChatControl = false;
+
 	export let items: {
 		label: string;
 		value: string;
@@ -514,6 +518,30 @@
 				{/each}
 			</div>
 
+			{#if showTemporaryChatControl}
+				<hr class="border-gray-100 dark:border-gray-800" />
+
+				<div class="flex items-center mx-2 my-2">
+					<button
+						class="flex justify-between w-full font-medium line-clamp-1 select-none items-center rounded-button py-2 px-3 text-sm text-gray-700 dark:text-gray-100 outline-none transition-all duration-75 hover:bg-gray-100 dark:hover:bg-gray-800 rounded-lg cursor-pointer data-[highlighted]:bg-muted"
+						on:click={() => {
+							temporaryChatEnabled.set(!$temporaryChatEnabled);
+							show = false;
+						}}
+					>
+						<div class="flex gap-2.5 items-center">
+							<ChatBubbleOval className="size-4" strokeWidth="2.5" />
+
+							{$i18n.t(`Temporary Chat`)}
+						</div>
+
+						<div>
+							<Switch state={$temporaryChatEnabled} />
+						</div>
+					</button>
+				</div>
+			{/if}
+
 			<div class="hidden w-[42rem]" />
 			<div class="hidden w-[32rem]" />
 		</slot>