v8

app.py

@@ -790,6 +790,9 @@ async def stream_agent_response(question: str, chat_history: List[List[str]]) ->
             logger.info("No chart generated for this turn.")
         else:
             logger.info("Returning a chart figure to UI.")
+        logger.info(
+            f"Returning from stream_agent_response: msg_len={len(message_content) if isinstance(message_content, str) else 'NA'}, chart={chart_fig is not None}"
+        )
         return message_content, chart_fig
 
 # Custom CSS for the app
@@ -1055,15 +1058,14 @@ def create_application():
             if isinstance(result, tuple) and len(result) == 2:
                 assistant_message, chart_fig = result
             elif isinstance(result, dict) and "content" in result:
-                assistant_message, chart_fig = result["content"], None
-            elif isinstance(result, str):
-                assistant_message, chart_fig = result, None
+                assistant_message, chart_fig = result.get("content", ""), None
             else:
-                logger.error("stream_agent_response returned unexpected value: %r", result)
-                assistant_message, chart_fig = (
-                    "## ❌ Error\n\nNo se recibió una respuesta válida del agente.",
-                    None,
-                )
+                # Fallback: coerce any unexpected result to string as assistant message
+                try:
+                    assistant_message = str(result) if result is not None else ""
+                except Exception:
+                    assistant_message = ""
+                chart_fig = None
 
             # Append assistant message back into messages history
             chat_history.append({"role": "assistant", "content": assistant_message})