Add id attributes for better element identification

Updated ResponseMessage.svelte

Update Sidebar.svelte

src/lib/components/layout/Sidebar.svelte

@@ -748,7 +748,10 @@
 				</a>
 
 				<a href="/" class="flex flex-1 px-1.5" on:click={newChatHandler}>
-					<div class=" self-center font-medium text-gray-850 dark:text-white font-primary">
+					<div
+						id="sidebar-webui-name"
+						class=" self-center font-medium text-gray-850 dark:text-white font-primary"
+					>
 						{$WEBUI_NAME}
 					</div>
 				</a>