fix: design harmonization on last features

features/activity_home_card_and_retention.feature

@@ -7,7 +7,7 @@ Feature: Recent activity card on Home and Retention card on Settings
   Background:
     Given the activity API (features/activity-log-backend.feature, activity-log-producers.feature, activity_screen.feature) and the settings retention fields already exist
     And this slice adds one field to the settings API, activity_next_cleanup_at, and wires the SPA to the existing endpoints; there is no other Go change
-    And the Home card and the Settings "Retention" card are the two items activity_screen.feature left out of scope; the spec of record is docs/design/screens/home.md ("Recent activity card") and docs/design/screens/settings.md ("Activity retention"), groups "Home card" and "Settings retention" of RenewCMS Screens Activity.dc.html
+    And the Home card and the Settings "Retention" card are the two items activity_screen.feature left out of scope; the spec of record is docs/design/screens/home.md ("Recent activity") and docs/design/screens/settings.md ("Activity retention"), groups "Home" and "Settings: Retention" of RenewCMS Screens Back-office.dc.html
     And both boards draw the existing cards as dashed placeholders, so neither card is pixel-compared and Vitest is the SPA coverage
     And "owner" and "admin" are the full Home view; any other or absent session role is the regular-user view
     And every new English string has a French entry in messages.ts