feat: download chat as txt file

src/lib/components/layout/Navbar.svelte

 <script lang="ts">
+	import toast from 'svelte-french-toast';
+	import fileSaver from 'file-saver';
+	const { saveAs } = fileSaver;
+
 	import { getChatById } from '$lib/apis/chats';
 	import { chatId, db, modelfiles } from '$lib/stores';
-	import toast from 'svelte-french-toast';
 
 	export let initNewChat: Function;
 	export let title: string = 'Ollama Web UI';
@@ -33,6 +36,21 @@
 			false
 		);
 	};
+
+	const downloadChat = async () => {
+		const chat = (await getChatById(localStorage.token, $chatId)).chat;
+		console.log('download', chat);
+
+		const chatText = chat.messages.reduce((a, message, i, arr) => {
+			return `${a}### ${message.role.toUpperCase()}\n${message.content}\n\n`;
+		}, '');
+
+		let blob = new Blob([chatText], {
+			type: 'text/plain'
+		});
+
+		saveAs(blob, `chat-${chat.title}.txt`);
+	};
 </script>
 
 <nav
@@ -69,7 +87,30 @@
 			</div>
 
 			{#if shareEnabled}
-				<div class="pl-2">
+				<div class="pl-2 flex space-x-1.5">
+					<button
+						class=" cursor-pointer p-2 flex dark:hover:bg-gray-700 rounded-lg transition border dark:border-gray-600"
+						on:click={async () => {
+							downloadChat();
+						}}
+					>
+						<div class=" m-auto self-center">
+							<svg
+								xmlns="http://www.w3.org/2000/svg"
+								viewBox="0 0 16 16"
+								fill="currentColor"
+								class="w-4 h-4"
+							>
+								<path
+									d="M8.75 2.75a.75.75 0 0 0-1.5 0v5.69L5.03 6.22a.75.75 0 0 0-1.06 1.06l3.5 3.5a.75.75 0 0 0 1.06 0l3.5-3.5a.75.75 0 0 0-1.06-1.06L8.75 8.44V2.75Z"
+								/>
+								<path
+									d="M3.5 9.75a.75.75 0 0 0-1.5 0v1.5A2.75 2.75 0 0 0 4.75 14h6.5A2.75 2.75 0 0 0 14 11.25v-1.5a.75.75 0 0 0-1.5 0v1.5c0 .69-.56 1.25-1.25 1.25h-6.5c-.69 0-1.25-.56-1.25-1.25v-1.5Z"
+								/>
+							</svg>
+						</div>
+					</button>
+
 					<button
 						class=" cursor-pointer p-2 flex dark:hover:bg-gray-700 rounded-lg transition border dark:border-gray-600"
 						on:click={async () => {
@@ -79,15 +120,15 @@
 						<div class=" m-auto self-center">
 							<svg
 								xmlns="http://www.w3.org/2000/svg"
-								viewBox="0 0 20 20"
+								viewBox="0 0 16 16"
 								fill="currentColor"
 								class="w-4 h-4"
 							>
 								<path
-									d="M9.25 13.25a.75.75 0 001.5 0V4.636l2.955 3.129a.75.75 0 001.09-1.03l-4.25-4.5a.75.75 0 00-1.09 0l-4.25 4.5a.75.75 0 101.09 1.03L9.25 4.636v8.614z"
+									d="M7.25 10.25a.75.75 0 0 0 1.5 0V4.56l2.22 2.22a.75.75 0 1 0 1.06-1.06l-3.5-3.5a.75.75 0 0 0-1.06 0l-3.5 3.5a.75.75 0 0 0 1.06 1.06l2.22-2.22v5.69Z"
 								/>
 								<path
-									d="M3.5 12.75a.75.75 0 00-1.5 0v2.5A2.75 2.75 0 004.75 18h10.5A2.75 2.75 0 0018 15.25v-2.5a.75.75 0 00-1.5 0v2.5c0 .69-.56 1.25-1.25 1.25H4.75c-.69 0-1.25-.56-1.25-1.25v-2.5z"
+									d="M3.5 9.75a.75.75 0 0 0-1.5 0v1.5A2.75 2.75 0 0 0 4.75 14h6.5A2.75 2.75 0 0 0 14 11.25v-1.5a.75.75 0 0 0-1.5 0v1.5c0 .69-.56 1.25-1.25 1.25h-6.5c-.69 0-1.25-.56-1.25-1.25v-1.5Z"
 								/>
 							</svg>
 						</div>