fix: improve katex render performance in responses

backend/start_windows.bat

@@ -7,7 +7,7 @@ SET "SCRIPT_DIR=%~dp0"
 cd /d "%SCRIPT_DIR%" || exit /b
 
 SET "KEY_FILE=.webui_secret_key"
-SET "PORT=%PORT:8080%"
+IF "%PORT%"=="" SET PORT=8080
 SET "WEBUI_SECRET_KEY=%WEBUI_SECRET_KEY%"
 SET "WEBUI_JWT_SECRET_KEY=%WEBUI_JWT_SECRET_KEY%"
 

src/lib/components/chat/Messages/ResponseMessage.svelte

@@ -11,6 +11,7 @@
 	import { onMount, tick, getContext } from 'svelte';
 
 	const i18n = getContext('i18n');
+	let componentRoot: HTMLElement;
 
 	const dispatch = createEventDispatcher();
 
@@ -133,7 +134,7 @@
 	};
 
 	const renderLatex = () => {
-		let chatMessageElements = document.getElementsByClassName('chat-assistant');
+		let chatMessageElements = componentRoot.getElementsByClassName('chat-assistant');
 		// let lastChatMessageElement = chatMessageElements[chatMessageElements.length - 1];
 
 		for (const element of chatMessageElements) {
@@ -322,7 +323,7 @@
 </script>
 
 {#key message.id}
-	<div class=" flex w-full message-{message.id}">
+	<div class=" flex w-full message-{message.id}" bind:this={componentRoot}>
 		<ProfileImage
 			src={modelfiles[message.model]?.imageUrl ?? `${WEBUI_BASE_URL}/static/favicon.png`}
 		/>