Render asset credit inside the gallery lightbox correctly

GLightbox's own selector-based description feature never actually
resolved a selector in three different attempts -- literal text,
then a resolved-but-empty div, then apparently not firing at all
against the installed (unversioned) build. Replaced with a small
afterSlideLoad handler that reads a plain data-credit-selector
attribute and copies the real element's HTML into the slide's
description area directly, depending only on GLightbox handing back
a real DOM node per slide -- a much smaller contract than trusting
its own caption-resolution feature.

Renamed the credit div's class from glightbox-desc, since that name
is reserved by the library's own bundled CSS (display: none
!important) and can't be reliably overridden from here.

Also: distinguishes the credit line and the "N Bilder" caption from
ordinary body text (italic, muted, matching .author_and_date's
existing convention), and makes the lightbox's caption card follow
the site's light/dark toggle via Canvas/CanvasText, since the
library's bundled theme never adapts to it on its own.

1 files changed, 2 insertions, 4 deletions

diff --git a/app/views/content/_asset_credits.html.erb b/app/views/content/_asset_credits.html.erb
index 85739d09..5959abd1 100644
--- a/app/views/content/_asset_credits.html.erb
+++ b/app/views/content/_asset_credits.html.erb
@@ -1,11 +1,9 @@
 <% if @page.assets.images.any? %>
   <div id="asset_credits">
     <% @page.assets.images.each do |image| %>
-      <% credit = asset_credit(image) %>
-      <% next unless credit %>
       <div id="credit_for_asset_<%= image.id %>"
-           class="glightbox-desc<%= " headline_credit" if image == @headline_asset %>">
-        <%= credit %>
+          class="asset_credit_block<%= " headline_credit" if image == @headline_asset %>">
+        <%= asset_credit(image) %>
       </div>
     <% end %>
   </div>