fix: improve handling of OpenAI responses and simplify MCP response wrapping

src/app.py

@@ -37,10 +37,12 @@ def handle_user_input():
                 response = st.session_state.client.get_chat_response(st.session_state.messages)
 
                 # Handle both MCP and standard OpenAI responses
-                if hasattr(response, "__iter__"):
+                # Check if it's NOT a dict (assuming stream is not a dict)
+                if not isinstance(response, dict):
                     # Standard OpenAI streaming response
                     for chunk in response:
-                        if chunk.choices[0].delta.content:
+                        # Ensure chunk has choices and delta before accessing
+                        if chunk.choices and chunk.choices[0].delta and chunk.choices[0].delta.content:
                             full_response += chunk.choices[0].delta.content
                             response_placeholder.markdown(full_response + "▌")
                 else:

src/openai_client.py

@@ -63,10 +63,6 @@ class OpenAIClient:
             raise Exception(error_msg)
 
     def _wrap_mcp_response(self, response: dict):
-        """Convert MCP response to OpenAI-compatible format"""
-
-        # Create a generator to simulate streaming response
-        def response_generator():
-            yield {"choices": [{"delta": {"content": response.get("assistant_text", "")}}]}
-
-        return response_generator()
+        """Return the MCP response dictionary directly (for non-streaming)."""
+        # No conversion needed if app.py handles dicts separately
+        return response