Fix: Card has no favorite icon (#2203)

fixes the bug if the card has no favorite icon

src/main/resources/static/js/homecard.js

@@ -83,6 +83,7 @@ function syncFavorites() {
   cards.forEach(card => {
     const isFavorite = localStorage.getItem(card.id) === "favorite";
     const starIcon = card.querySelector(".favorite-icon span.material-symbols-rounded");
+    if (starIcon) {
       if (isFavorite) {
         starIcon.classList.remove("no-fill");
         starIcon.classList.add("fill");
@@ -92,6 +93,7 @@ function syncFavorites() {
         starIcon.classList.add("no-fill");
         card.classList.remove("favorite");
       }
+    }
   });
   updateFavoritesSection();
   updateFavoritesDropdown();