[Enhancement] README 및 코드에서 Playwright 의존성 및 SSO 로그인 흐름 개선

lib/prompt/__init__.py

@@ -1,13 +1,12 @@
 from dotenv import load_dotenv
 import os
 
-from lib.prompt import session
-from lib.prompt import llm_login
-
 load_dotenv(override=True)
 
 def extend_planner_system_message():
   if os.getenv("PROVIDOR_CREDENTIALS_IN_LLM", "False").lower() == "true":
+    from lib.prompt import llm_login
     return llm_login.extend_planner_system_message
   else:
+    from lib.prompt import session
     return session.extend_planner_system_message