fix: ninja margin

Author: 0xneves

components/account/TokenHoldings.vue

@@ -211,7 +211,7 @@ const onViewAll = () => {
       </div>
 
       <!-- Footer CTA (sticky bottom, styled like List.vue) -->
-      <div class="px-6 py-3 mt-3 text-center bg-[#151515] rounded-b-md border-t border-[#222222]">
+      <div class="px-6 py-3 text-center bg-[#151515] rounded-b-md border-t border-[#222222]">
         <button 
           class="text-[12px] font-semibold text-[#b8b8b8] hover:text-[#9ccee7]"
           @click.prevent="onViewAll"