Group user accounts by role

Replaces the two-way admin/user split with four groups ordered by
capability: administration, Redaktion, editors, alumni. alumni takes
precedence over capability in role_group, so a retired admin appears at the
bottom rather than the top.

Forms now offer the three roles as checkboxes rather than a single admin
checkbox, with a trailing hidden blank so an empty set can be posted, and
user_params permits roles only for admins. Three create buttons prefill the
common combinations.

1 files changed, 4 insertions, 2 deletions

diff --git a/app/views/users/show.html.erb b/app/views/users/show.html.erb
index 44976800..a320e53e 100644
--- a/app/views/users/show.html.erb
+++ b/app/views/users/show.html.erb
@@ -19,7 +19,9 @@
     <div class="layout_row_label"><%= t("users.labels.email") %></div>
     <div class="layout_row_content"><%= @user.email %></div>
 
-    <div class="layout_row_label"><%= t("users.labels.admin") %></div>
-    <div class="layout_row_content"><%= @user.admin ? t("admin.common.yes") : t("admin.common.no") %></div>
+    <div class="layout_row_label"><%= t("users.labels.roles") %></div>
+    <div class="layout_row_content">
+      <%= @user.roles.any? ? @user.role_labels.join(", ") : t("users.no_roles") %>
+    </div>
   </div>
 </div>