feat(web): unify home published/growth cards with heat-strip vertical layout

reaction_board/web/static/app.js

@@ -125,7 +125,7 @@ window.addEventListener("error", (event) => {
   const target = event.target;
   if (target instanceof HTMLImageElement) {
     target.classList.add("image-error");
-    const wrapper = target.closest(".video-thumb, .hero-cover, .heat-thumb, .candidate-thumb");
+    const wrapper = target.closest(".video-thumb, .hero-cover, .media-thumb, .candidate-thumb");
     wrapper?.classList.add("cover-placeholder");
   }
 }, true);