Refactor app helpers and use AppStateDep in config router

Move service-dependent helper wrappers from app.utils to app.helpers and update config router activation/rollback to use explicit AppState dependency.

backend/app/services/jail_config_service.py

@@ -21,6 +21,13 @@ from typing import cast
 import structlog
 
 from app.exceptions import JailNotFoundError
+from app.helpers.config_file_helpers import (
+    _build_inactive_jail,
+    _get_active_jail_names,
+    _parse_jails_sync,
+    _validate_jail_config_sync,
+)
+from app.helpers.jail_helpers import reload_jails
 from app.models.config import (
     ActivateJailRequest,
     InactiveJail,
@@ -29,14 +36,7 @@ from app.models.config import (
     JailValidationResult,
     RollbackResponse,
 )
-from app.utils.config_file_utils import (
-    _build_inactive_jail,
-    _get_active_jail_names,
-    _parse_jails_sync,
-    _validate_jail_config_sync,
-)
 from app.utils.fail2ban_client import Fail2BanClient
-from app.utils.jail_utils import reload_jails
 
 log: structlog.stdlib.BoundLogger = structlog.get_logger()
 
@@ -461,7 +461,7 @@ async def start_daemon(start_cmd_parts: list[str]) -> bool:
         return False
 
 
-# Shared functions from config_file_service are imported from app.utils.config_file_utils
+# Shared functions from config_file_service are imported from app.helpers.config_file_helpers
 
 
 # ---------------------------------------------------------------------------