fix: add missing btn-sm class

src/tailwind.css

@@ -191,6 +191,10 @@ thead .fc-day-selected:hover {
     @apply tw-bg-aura-primary tw-text-white tw-ring-gray-200 hocus:enabled:tw-brightness-125 dark:tw-ring-white;
   }
 
+  .btn-sm {
+    @apply tw-px-2 tw-py-1 tw-text-sm;
+  }
+
   .form-group {
     margin-bottom: 1rem;
   }