feat(web-console): unify spatial UI and chat reset

apps/web-console/app.js

@@ -8854,10 +8854,9 @@ function downloadArtifact(type) {
   URL.revokeObjectURL(link.href);
 }
 
-function startNewConversation() {
-  state.conversationId = createConversationId();
+function startNewConversation(event) {
+  state.conversationId = String(event?.detail?.conversationId || createConversationId());
   sessionStorage.setItem("cognitive-agent.conversation-id", state.conversationId);
-  window.location.reload();
 }
 
 window.CognitiveAgentConsole = {
@@ -9024,7 +9023,7 @@ document.addEventListener("DOMContentLoaded", async () => {
       $("#requestForm").requestSubmit();
     }
   });
-  $("#newConversation").addEventListener("click", startNewConversation);
+  window.addEventListener("cognitive-agent:new-conversation", startNewConversation);
   $("#vehicleSelect").addEventListener("change", (event) => {
     selectVehicle(event.target.value);
   });