fix: apply isort fix to tools/base.py from pre-commit hook

Author: jzhu

code_assistant_manager/tools/base.py

@@ -5,9 +5,7 @@
 
 from ..config import ConfigManager
 from ..env_loader import load_env
-from ..exceptions import (
-    create_error_handler,
-)
+from ..exceptions import create_error_handler
 from .registry import TOOL_REGISTRY
 
 logger = logging.getLogger(__name__)