feat: add frontend support for locally sharing chats

src/routes/(app)/+page.svelte

@@ -48,7 +48,7 @@
 	let messagesContainerElement: HTMLDivElement;
 	let currentRequestId = null;
 
-	let showModelSelector = false;
+	let showModelSelector = true;
 	let selectedModels = [''];
 
 	let selectedModelfile = null;

src/routes/(app)/c/[id]/+page.svelte

@@ -56,7 +56,7 @@
 	let currentRequestId = null;
 
 	// let chatId = $page.params.id;
-	let showModelSelector = false;
+	let showModelSelector = true;
 	let selectedModels = [''];
 	let selectedModelfile = null;
 

src/routes/(app)/s/[id]/+page.svelte

@@ -0,0 +1,187 @@
+<script lang="ts">
+	import { onMount, tick, getContext } from 'svelte';
+	import { goto } from '$app/navigation';
+	import { page } from '$app/stores';
+
+	import { modelfiles, settings, chatId, WEBUI_NAME } from '$lib/stores';
+	import { convertMessagesToHistory } from '$lib/utils';
+
+	import { getChatByShareId } from '$lib/apis/chats';
+
+	import Messages from '$lib/components/chat/Messages.svelte';
+	import Navbar from '$lib/components/layout/Navbar.svelte';
+
+	const i18n = getContext('i18n');
+
+	let loaded = false;
+
+	let autoScroll = true;
+	let processing = '';
+	let messagesContainerElement: HTMLDivElement;
+
+	// let chatId = $page.params.id;
+	let showModelSelector = false;
+	let selectedModels = [''];
+
+	let selectedModelfiles = {};
+	$: selectedModelfiles = selectedModels.reduce((a, tagName, i, arr) => {
+		const modelfile =
+			$modelfiles.filter((modelfile) => modelfile.tagName === tagName)?.at(0) ?? undefined;
+
+		return {
+			...a,
+			...(modelfile && { [tagName]: modelfile })
+		};
+	}, {});
+
+	let chat = null;
+
+	let title = '';
+	let files = [];
+
+	let messages = [];
+	let history = {
+		messages: {},
+		currentId: null
+	};
+
+	$: if (history.currentId !== null) {
+		let _messages = [];
+
+		let currentMessage = history.messages[history.currentId];
+		while (currentMessage !== null) {
+			_messages.unshift({ ...currentMessage });
+			currentMessage =
+				currentMessage.parentId !== null ? history.messages[currentMessage.parentId] : null;
+		}
+		messages = _messages;
+	} else {
+		messages = [];
+	}
+
+	$: if ($page.params.id) {
+		(async () => {
+			if (await loadSharedChat()) {
+				await tick();
+				loaded = true;
+
+				window.setTimeout(() => scrollToBottom(), 0);
+				const chatInput = document.getElementById('chat-textarea');
+				chatInput?.focus();
+			} else {
+				await goto('/');
+			}
+		})();
+	}
+
+	//////////////////////////
+	// Web functions
+	//////////////////////////
+
+	const loadSharedChat = async () => {
+		await chatId.set($page.params.id);
+		chat = await getChatByShareId(localStorage.token, $chatId).catch(async (error) => {
+			await goto('/');
+			return null;
+		});
+
+		if (chat) {
+			const chatContent = chat.chat;
+
+			if (chatContent) {
+				console.log(chatContent);
+
+				selectedModels =
+					(chatContent?.models ?? undefined) !== undefined
+						? chatContent.models
+						: [chatContent.models ?? ''];
+				history =
+					(chatContent?.history ?? undefined) !== undefined
+						? chatContent.history
+						: convertMessagesToHistory(chatContent.messages);
+				title = chatContent.title;
+
+				let _settings = JSON.parse(localStorage.getItem('settings') ?? '{}');
+				await settings.set({
+					..._settings,
+					system: chatContent.system ?? _settings.system,
+					options: chatContent.options ?? _settings.options
+				});
+				autoScroll = true;
+				await tick();
+
+				if (messages.length > 0) {
+					history.messages[messages.at(-1).id].done = true;
+				}
+				await tick();
+
+				return true;
+			} else {
+				return null;
+			}
+		}
+	};
+
+	const scrollToBottom = () => {
+		if (messagesContainerElement) {
+			messagesContainerElement.scrollTop = messagesContainerElement.scrollHeight;
+		}
+	};
+
+	onMount(async () => {
+		if (!($settings.saveChatHistory ?? true)) {
+			await goto('/');
+		}
+	});
+</script>
+
+<svelte:head>
+	<title>
+		{title
+			? `${title.length > 30 ? `${title.slice(0, 30)}...` : title} | ${$WEBUI_NAME}`
+			: `${$WEBUI_NAME}`}
+	</title>
+</svelte:head>
+
+{#if loaded}
+	<div class="min-h-screen max-h-screen w-full flex flex-col">
+		<Navbar
+			{title}
+			bind:selectedModels
+			bind:showModelSelector
+			shareEnabled={false}
+			initNewChat={async () => {
+				goto('/');
+			}}
+		/>
+		<div class="flex flex-col flex-auto">
+			<div
+				class=" pb-2.5 flex flex-col justify-between w-full flex-auto overflow-auto h-0"
+				id="messages-container"
+				bind:this={messagesContainerElement}
+				on:scroll={(e) => {
+					autoScroll =
+						messagesContainerElement.scrollHeight - messagesContainerElement.scrollTop <=
+						messagesContainerElement.clientHeight + 5;
+				}}
+			>
+				<div class=" h-full w-full flex flex-col py-4">
+					<Messages
+						chatId={$chatId}
+						readOnly={true}
+						{selectedModels}
+						{selectedModelfiles}
+						{processing}
+						bind:history
+						bind:messages
+						bind:autoScroll
+						bottomPadding={files.length > 0}
+						sendPrompt={() => {}}
+						continueGeneration={() => {}}
+						regenerateResponse={() => {}}
+					/>
+				</div>
+			</div>
+		</div>
+	</div>
+{/if}