refactor(agent): standardize memory handling and update chat history logic (#8715)

* update chat history

* update to agents

* Update Simple Agent.json

* update to templates

* ruff errors

* Update agent.py

* Update test_agent_component.py

* [autofix.ci] apply automated fixes

* update templates

* test fix

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Mike Fortman <michael.fortman@datastax.com>

src/backend/tests/unit/components/agents/test_agent_component.py

@@ -14,7 +14,6 @@ from langflow.base.models.openai_constants import (
 from langflow.components.agents.agent import AgentComponent
 from langflow.components.tools.calculator import CalculatorToolComponent
 from langflow.custom import Component
-from langflow.utils.constants import MESSAGE_SENDER_AI, MESSAGE_SENDER_NAME_AI
 
 from tests.base import ComponentTestBaseWithClient, ComponentTestBaseWithoutClient
 from tests.unit.mock_language_model import MockLanguageModel
@@ -50,9 +49,6 @@ class TestAgentComponent(ComponentTestBaseWithoutClient):
             "system_prompt": "You are a helpful assistant.",
             "tools": [],
             "verbose": True,
-            "session_id": str(uuid4()),
-            "sender": MESSAGE_SENDER_AI,
-            "sender_name": MESSAGE_SENDER_NAME_AI,
         }
 
     async def test_build_config_update(self, component_class, default_kwargs):
@@ -129,7 +125,7 @@ class TestAgentComponentWithClient(ComponentTestBaseWithClient):
             input_value=input_value,
             api_key=api_key,
             model_name="gpt-4o",
-            llm_type="OpenAI",
+            agent_llm="OpenAI",
             temperature=temperature,
             _session_id=str(uuid4()),
         )