chore: retire legacy wolai backend runtime

wolai-backend/app/config.py

@@ -15,21 +15,10 @@ class Settings(BaseSettings):
         env_file=str(ENV_ALL_PATH), env_file_encoding="utf-8", extra="ignore"
     )
 
-    # 说明：项目迁移到 Convex 的过程中，后端可能暂时不依赖 Supabase。
-    # 因此这里给出空字符串默认值，避免本地未配置 .env 时无法启动开发服务器。
-    supabase_url: str = ""
-    supabase_service_role_key: str = ""
-    redis_url: str = "redis://localhost:6379/0"
     frontend_url: str = "http://localhost:3000"
-    openai_api_key: str = ""
-    mnote_ai_default_model: str = ""
-    mnote_ai_orchestrator_api_key: str = ""
-    openai_agents_session_db_path: str = ""
-    lightrag_db_url: str = ""
-    lightrag_collection: str = "wolai-docs"
-
-
-@lru_cache
+
+
+@lru_cache
 def get_settings() -> Settings:
     """惰性实例化设置，避免重复读取文件。"""
     return Settings()