Initial commit: Bocken theme for webtrees

Nord-themed dark/light mode family tree theme with:
- Floating glass-morphism header bar
- Auto/light/dark theme toggle with Lucide icons
- Smart SVG logo with theme-aware fill colors
- Active page highlighting with per-menu Nord icon colors
- Language button showing 2-letter abbreviation
- Start page search form
- Mobile responsive icon-only nav
- Custom views inherited from ArgonLight

resources/views/modules/lightbox/tab.phtml

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+use Fisharebest\Webtrees\Media;
+use Illuminate\Support\Collection;
+
+/**
+ * @var Collection<int,Media> $media_list
+ */
+
+?>
+<div class="wt-tab-album container px-0 py-4">
+    <div class="row">
+    <?php foreach ($media_list as $media) : ?>
+        <figure class="figure text-center col-sm-6 col-md-4 col-lg-3 col-xl-3 wt-album-tab-figure">
+            <?php foreach ($media->mediaFiles() as $media_file) : ?>
+                <?= $media_file->displayImage(100, 100, 'contain', ['class' => 'img-thumbnail wt-album-tab-image']) ?>
+            <?php endforeach ?>
+            <figcaption class="figure-caption wt-album-tab-caption">
+                <a href="<?= e($media->url()) ?>">
+                    <?= $media->fullName() ?>
+                </a>
+            </figcaption>
+        </figure>
+    <?php endforeach ?>
+</div>
+</div>