fix: revert srcset on beforeafter images

Le srcset sur image-before/image-after perturbait le clip CSS
(width: var(--position)) rendant l'effet before/after inopérant.
On revient aux img simples (src only) pour garantir le bon fonctionnement
du slider.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

site/templates/investigation.php

@@ -221,11 +221,7 @@ $dateLocale = substr(is_array($locale) ? reset($locale) : $locale, 0, 5);
 
                         <?php elseif ($block->type() === 'beforeafter'): ?>
                             <div class="media">
-                                <?php snippet('blocks/' . $block->type(), [
-                                    'block'     => $block,
-                                    'imgSizes'  => '100vw',
-                                    'imgSrcset' => 'body-full',
-                                ]) ?>
+                                <?php snippet('blocks/' . $block->type(), ['block' => $block]) ?>
                             </div>
 
                         <?php elseif ($block->type() === 'video'): ?>