refine agent (#2787)

### What problem does this PR solve?



### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [x] Performance Improvement
- [ ] Other (please describe):

api/apps/canvas_app.py

@@ -112,7 +112,7 @@ def run():
             canvas.messages.append({"role": "user", "content": req["message"], "id": message_id})
             if len([m for m in canvas.messages if m["role"] == "user"]) > 1:
                 ten = TenantService.get_by_user_id(current_user.id)[0]
-                req["message"] = full_question(ten["tenant_id"], ten["llm_id"], canvas.messages)
+                #req["message"] = full_question(ten["tenant_id"], ten["llm_id"], canvas.messages)
             canvas.add_user_input(req["message"])
         answer = canvas.run(stream=stream)
         print(canvas)