[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/security_utils.py

@@ -1,7 +1,18 @@
 from comfyui_manager.glob import manager_core as core
+from comfy.cli_args import args
+
+
+def is_loopback(address):
+    import ipaddress
+    try:
+        return ipaddress.ip_address(address).is_loopback
+    except ValueError:
+        return False
 
 
 def is_allowed_security_level(level):
+    is_local_mode = is_loopback(args.listen)
+    
     if level == "block":
         return False
     elif level == "high":