Feat/chat history (#187)

* fix:get chat history in the fun mos.search() and mos.chat()

* fix: get chat history in the unittest

Author: endxxxx

src/memos/mem_os/core.py

@@ -289,7 +289,7 @@ def chat(self, query: str, user_id: str | None = None, base_prompt: str | None =
                     info={
                         "user_id": target_user_id,
                         "session_id": self.session_id,
-                        "chat_history": chat_history,
+                        "chat_history": chat_history.chat_history,
                     },
                 )
                 memories_all.extend(memories)
@@ -590,7 +590,7 @@ def search(
                     info={
                         "user_id": target_user_id,
                         "session_id": self.session_id,
-                        "chat_history": chat_history,
+                        "chat_history": chat_history.chat_history,
                     },
                 )
                 result["text_mem"].append({"cube_id": mem_cube_id, "memories": memories})

tests/mem_os/test_memos_core.py

@@ -592,7 +592,7 @@ def test_chat_with_memories(
             info={
                 "user_id": mos.user_id,
                 "session_id": mos.session_id,
-                "chat_history": mos.chat_history_manager[mos.user_id],
+                "chat_history": mos.chat_history_manager[mos.user_id].chat_history,
             },
         )