fix(frontend): Prevent rendering loading spinner in chat interface to…

…o frequently (#6009)

frontend/src/context/ws-client-provider.tsx

@@ -5,6 +5,7 @@ import EventLogger from "#/utils/event-logger";
 import { handleAssistantMessage } from "#/services/actions";
 import { useRate } from "#/hooks/use-rate";
 import { OpenHandsParsedEvent } from "#/types/core";
+import { AgentStateChangeObservation } from "#/types/core/observations";
 
 const isOpenHandsMessage = (event: unknown): event is OpenHandsParsedEvent =>
   typeof event === "object" &&
@@ -14,6 +15,11 @@ const isOpenHandsMessage = (event: unknown): event is OpenHandsParsedEvent =>
   "message" in event &&
   "timestamp" in event;
 
+const isAgentStateChangeObservation = (
+  event: OpenHandsParsedEvent,
+): event is AgentStateChangeObservation =>
+  "observation" in event && event.observation === "agent_state_changed";
+
 export enum WsClientProviderStatus {
   CONNECTED,
   DISCONNECTED,
@@ -68,7 +74,7 @@ export function WsClientProvider({
   }
 
   function handleMessage(event: Record<string, unknown>) {
-    if (isOpenHandsMessage(event)) {
+    if (isOpenHandsMessage(event) && !isAgentStateChangeObservation(event)) {
       messageRateHandler.record(new Date().getTime());
     }
     setEvents((prevEvents) => [...prevEvents, event]);