v0.3.2 - Fix dark mode conflicts with WordPress global styles

Fix dark mode body colors overridden by WordPress theme.json styles.color,
add broad dark mode rules for plugin form elements, fix footer-columns
template, and add style variation bridge function.

Co-Authored-By: Claude <noreply@anthropic.com>

views/partials/footer-columns.html.twig

@@ -1,4 +1,4 @@
-<footer class="bg-dark text-light mt-auto">
+<footer class="bg-body-tertiary mt-auto">
     <div class="container py-5">
         <div class="row">
             <div class="col-lg-4 mb-4 mb-lg-0">