Require a fresh second factor for user management

Administrative actions are gated behind a 30-minute elevation window:
creating and retiring accounts, editing roles, clearing a second factor.
Reading the list is not gated, and content work is untouched.

elevated? is tied to is_admin?, so losing the role closes the window at
once. The window opens when the second factor verifies at login, so an
admin heading straight for user management is already elevated, and closes
on logout with the other session state. Five wrong codes end the session,
mirroring the login challenge.

users#update carries no elevation filter, since self-service reaches it;
the role field is gated in user_params instead and fails closed.

1 files changed, 11 insertions, 0 deletions

diff --git a/config/locales/en.yml b/config/locales/en.yml
index 2f7ac72f..9a8041bf 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -587,6 +587,8 @@ en:
       none_to_remove: "No %{lang} translation exists to remove."
       last_translation: "Can't remove the only remaining translation."
       removed: "%{lang} translation removed from the draft. Publish to make this permanent."
+    elevation:
+      dropped: "Administrative rights dropped."
 
   assets:
     index:
@@ -664,6 +666,15 @@ en:
       title: "Compare"
       default_marker: "default"
 
+  elevations:
+    new:
+      title: "Request administrative rights"
+      hint: "User management needs a current second factor. The rights then last %{minutes} minutes."
+      code: "Current code"
+      elevate: "Request rights"
+      not_enrolled: "Administrative work requires a second factor. Please set one up first."
+      enrol: "Set up a second factor"
+
   layouts:
     application:
       light_mode_aria: "Switch between dark and light mode"