fix: always redirect to /devices when stopping impersonation

Previously redirected to /dashboard or /orgs based on whether the
superuser had organizations. Now always goes to /devices for
consistency.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

lib/towerops_web/user_auth.ex

@@ -883,13 +883,6 @@ defmodule ToweropsWeb.UserAuth do
       ip_address: ip
     })
 
-    # Dashboard page
-    redirect_path =
-      case Towerops.Organizations.list_user_organizations(superuser.id) do
-        [_first_org | _] -> ~p"/dashboard"
-        [] -> ~p"/orgs"
-      end
-
     conn
     |> delete_session(:superuser_id)
     |> delete_session(:target_user_id)
@@ -897,7 +890,7 @@ defmodule ToweropsWeb.UserAuth do
     |> assign(:current_scope, Scope.for_user(superuser))
     |> maybe_set_default_organization(superuser)
     |> put_flash(:info, t_admin("Stopped impersonating"))
-    |> redirect(to: redirect_path)
+    |> redirect(to: ~p"/devices")
   end
 
   ## Login tracking helpers