blocks : rename jeu → game (snippet, blueprint, CSS, content)

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

site/snippets/blocks/game.php

@@ -0,0 +1,21 @@
+<?php if ($block->url()->isNotEmpty()):
+  $iframeUrl = preg_replace('/\s+/', '', $block->url()->value());
+?>
+<div class="iframe-game-container">
+  <iframe
+    loading="eager"
+    importance="high"
+    width="400"
+    height="650"
+    style="border: none; overflow: hidden; pointer-events: none; display: block; width: 100%;"
+    src="<?= htmlspecialchars($iframeUrl, ENT_QUOTES, 'UTF-8') ?>"
+  ></iframe>
+  <div class="iframe-click-overlay" data-state="initial">
+    <div class="overlay-content">
+      <div class="play-icon">▶</div>
+      <p class="overlay-message">Cliquez pour jouer</p>
+    </div>
+  </div>
+  <button class="iframe-deactivate-btn" title="Deactivate game (restore scrolling)">✕</button>
+</div>
+<?php endif ?>