fix: Remove JSON result from assistant_response in /chat/unified - cleaner UI response

api_routes_v2.py

@@ -1115,9 +1115,9 @@ async def chat_unified(
                         model_name=proposed.get("_model", "unknown"),
                         is_fallback=False
                     )
-                # CHANGE: include actual user-facing result
+                # User-facing message (result is in api_response.result, not assistant_response)
                 result_text = _extract_user_facing_text(result)
-                friendly = f"🎉 Pipeline completed successfully!\n\n{result_text or '✅ All done!'}"  # CHANGE
+                friendly = f"🎉 Pipeline completed successfully!"
                 api_data = {
                     "type": "pipeline_completed",
                     "result": result,