fix(demo): guard against undefined data in useMemories hook (v2 async response) (#5029)

Co-authored-by: Kartik <kartik.labhshetwar@mem0.ai>

examples/mem0-demo/components/assistant-ui/memory-ui.tsx

@@ -16,10 +16,10 @@ type RetrievedMemory = {
 
 type NewMemory = {
   id: string;
-  data: {
+  data?: {
     memory: string;
   };
-  event: "ADD" | "DELETE";
+  event: "ADD" | "UPDATE" | "DELETE" | "GET";
 };
 
 type NewMemoryAnnotation = {
@@ -47,7 +47,9 @@ const useMemories = (): Memory[] => {
     () =>
       annotations?.filter(isMemoryAnnotation).flatMap((a) => {
         if (a.type === "mem0-update") {
-          return a.memories.map(
+          return a.memories
+            .filter((m): m is NewMemory & { data: { memory: string } } => m.data != null)
+            .map(
               (m): Memory => ({
                 event: m.event,
                 id: m.id,