The sidebar template now reads sidebar.admin_nav_item UI slots from
modules and merges them into the matching admin nav group (by group
key). Module permissions are resolved via layoutAuth which already
includes module UI abilities from ModuleRegistry::getModuleUiAbilities().
This restores audit nav items (API audit, System audit, Import logs,
User lifecycle logs) in the Logs group when the audit module is active.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>