feat(galerias): accept JPEG XL photos and list every uploaded format

site/includes/gallery.php

@@ -6,8 +6,9 @@
 // tile (without dragging) opens it full size in a <dialog> lightbox with prev /
 // next, arrow keys, Esc and swipe; the repeated copies are hidden from assistive
 // tech and open the same photo.
-$files = glob(rtrim($gallery_path, '/') . '/*.jpg');
-if (!$files || !is_array($files)) $files = [];
+// Every format the admin upload accepts (functions_galerias.php), not just .jpg.
+$files = preg_grep('/\.(jpe?g|png|gif|webp|jxl)$/i', glob(rtrim($gallery_path, '/') . '/*') ?: []);
+$files = array_values($files ?: []);
 // Column span per tile, cycled: w = two columns, s = one.
 $gal_shapes = ['w', 's', 's', 's', 's', 'w', 's', 's', 's', 's', 's'];
 $gal_label  = $gallery_h2 ?? 'Instalações';