Add post-video redirect to YouTube URL from env config.

After the intro finishes, users are redirected to POST_VIDEO_REDIRECT_URL loaded via generated config.js for dev, Docker, and Dokploy deployments.

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

index.html

@@ -154,8 +154,11 @@
         </div>
     </div>
 
+    <script src="/config.js"></script>
     <script>
+        const config = window.SLAVIC_PULSE_CONFIG || {};
         const VIDEO_ID = 'kujXXtoHUbc';
+        const POST_VIDEO_REDIRECT_URL = config.postVideoRedirectUrl || '';
         const BG_IMAGE = '/assets/imgs/www-bg-slavic-pulse-com-001.jpg';
         let player;
 
@@ -239,6 +242,9 @@
         function onPlayerStateChange(event) {
             if (event.data === YT.PlayerState.ENDED) {
                 stageVideo.classList.remove('active');
+                if (POST_VIDEO_REDIRECT_URL) {
+                    window.location.href = POST_VIDEO_REDIRECT_URL;
+                }
             }
         }