refactorings

frontend/src/lib/components/chatbotDemo/Chatbot.svelte

@@ -1,12 +1,12 @@
 <script lang="ts">
-    import { Chat } from "./chat"
+    import { WerkChatSession } from "@kontextwerk/web-sdk"
     import InputRow from "./InputRow.svelte"
     import Messages from "./Messages.svelte"
     function generateUniqueId() {
         return Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15)
     }
     let chat = $derived(
-        new Chat(generateUniqueId(), {
+        new WerkChatSession(generateUniqueId(), {
             url: "https://2schat-server.robins-spielwiese.de/api/v1/chatbot/stream",
             headers: {
                 "Content-Type": "application/json",