Reduce button padding in card action bars to prevent overflow

Targets with screen capture sources show 5 action buttons which
overflowed the card width. Scoped smaller padding to .card-actions
.btn-icon where target cards render.

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

server/src/wled_controller/static/css/components.css

@@ -52,6 +52,11 @@
     align-items: center;
 }
 
+.card-actions .btn-icon {
+    padding: 6px 8px;
+    font-size: 1.1rem;
+}
+
 .btn {
     padding: 8px 16px;
     border: none;