Allow users to be hard-deleted from the admin user show page

app/views/admin/users/show.html.haml

@@ -177,7 +177,7 @@
             %p Deleting a user has the following effects:
             = render 'users/deletion_guidance', user: @user
             %br
-            = link_to 'Remove user', [:admin, @user], data: { confirm: "USER #{@user.name} WILL BE REMOVED! Are you sure?" }, method: :delete, class: "btn btn-remove"
+            = link_to 'Remove user', admin_user_path(@user), data: { confirm: "USER #{@user.name} WILL BE REMOVED! Are you sure?" }, method: :delete, class: "btn btn-remove"
           - else
             - if @user.solo_owned_groups.present?
               %p
@@ -188,3 +188,22 @@
             - else
               %p
                 You don't have access to delete this user.
+
+      .panel.panel-danger
+        .panel-heading
+          Remove user and contributions
+        .panel-body
+          - if can?(current_user, :destroy_user, @user)
+            %p
+              This option deletes the user and any contributions that
+              would usually be moved to the
+              = succeed "." do
+                = link_to "system ghost user", help_page_path("user/profile/account/delete_account")
+              As well as the user's personal projects, groups owned solely by
+              the user, and projects in them, will also be removed. Commits
+              to other projects are unaffected.
+            %br
+            = link_to 'Remove user and contributions', admin_user_path(@user, hard_delete: true), data: { confirm: "USER #{@user.name} WILL BE REMOVED! Are you sure?" }, method: :delete, class: "btn btn-remove"
+          - else
+            %p
+              You don't have access to delete this user.

spec/features/admin/admin_users_spec.rb

@@ -117,6 +117,9 @@ describe "Admin::Users", feature: true do
 
       expect(page).to have_content(user.email)
       expect(page).to have_content(user.name)
+      expect(page).to have_link('Block user', href: block_admin_user_path(user))
+      expect(page).to have_link('Remove user', href: admin_user_path(user))
+      expect(page).to have_link('Remove user and contributions', href: admin_user_path(user, hard_delete: true))
     end
 
     describe 'Impersonation' do