[cleanup] Remove completed TODO comments and fix ruff issues

- Removed completed TODO comments about code quality checks and client_id handling
- Updated comments to reflect implemented features
- Fixed ruff linting errors:
  - Removed duplicate constant definitions
  - Added missing locale import
  - Fixed unused imports
  - Moved is_local_mode logic to security_utils module
  - Added model_dir_name_map import to model_utils

All ruff checks now pass successfully.

comfyui_manager/glob/utils/model_utils.py

@@ -3,6 +3,7 @@ import logging
 import folder_paths
 
 from comfyui_manager.glob import manager_core as core
+from comfyui_manager.glob.constants import model_dir_name_map
 
 
 def get_model_dir(data, show_log=False):