refactor: remove unused imports and streamline code in calculations and navigation services

services/navigation.py

@@ -1,11 +1,11 @@
 from __future__ import annotations
 
 from dataclasses import dataclass, field
-from typing import Iterable, List, Optional, Sequence
+from typing import Iterable, List, Sequence
 
 from fastapi import Request
 
-from models.navigation import NavigationGroup, NavigationLink
+from models.navigation import NavigationLink
 from services.repositories import NavigationRepository
 from services.session import AuthSession
 
@@ -92,7 +92,7 @@ class NavigationService:
     ) -> List[NavigationLinkDTO]:
         resolved_roles = tuple(roles)
         mapped: List[NavigationLinkDTO] = []
-        for link in sorted(links, key=lambda l: (l.sort_order, l.id)):
+        for link in sorted(links, key=lambda x: (x.sort_order, x.id)):
             if not include_children and link.parent_link_id is not None:
                 continue
             if not include_disabled and (not link.is_enabled):