Fix menu item sorting by using sortBy() instead of sort() (#18220)

Changed Collection::sort() to Collection::sortBy() in getUserMenuItems()
and getTenantMenuItems() methods. The sort() method expects a comparison
callback but was being called with a single-parameter callback that returns
a value, resulting in unpredictable sorting order. sortBy() correctly sorts
by the returned value.

This ensures menu items are consistently ordered by their sort value.

packages/panels/src/Panel/Concerns/HasTenancy.php

@@ -383,7 +383,7 @@ trait HasTenancy
                 fn (Collection $items): Collection => $items->put('register', $this->getTenantRegistrationMenuItem()),
             )
             ->filter(fn (Action $item): bool => $item->isVisible())
-            ->sort(fn (Action $item): int => $item->getSort())
+            ->sortBy(fn (Action $item): int => $item->getSort())
             ->all();
     }
 

packages/panels/src/Panel/Concerns/HasUserMenu.php

@@ -127,7 +127,7 @@ trait HasUserMenu
                 fn (Collection $items): Collection => $items->put('logout', $this->getUserLogoutMenuItem()),
             )
             ->filter(fn (Action $item): bool => $item->isVisible())
-            ->sort(fn (Action $item): int => $item->getSort())
+            ->sortBy(fn (Action $item): int => $item->getSort())
             ->all();
     }
 }