Adjust app walkthrough video to match screenshot size in gallery

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: ryanmio

docs/index.html

@@ -824,7 +824,7 @@ <h2>Command Interface</h2>
                     </div>
                 </div>
                 <div class="media-item">
-                    <video controls style="aspect-ratio: 9/16; object-fit: cover;">
+                    <video controls style="aspect-ratio: 9/16; object-fit: cover; max-width: 100%; height: auto;">
                         <source src="videos/app.mp4" type="video/mp4">
                         Your browser does not support the video tag.
                     </video>