fix(loyalty): remove card_number display from transactions list

TransactionResponse doesn't include card_number, so the template was
showing '-' under every customer name. Removed the nonexistent field.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/loyalty/templates/loyalty/shared/transactions-list.html

@@ -60,7 +60,6 @@
                             </div>
                             <div>
                                 <p class="font-semibold" x-text="tx.customer_name || 'Unknown'"></p>
-                                <p class="text-xs text-gray-600 dark:text-gray-400" x-text="tx.card_number || '-'"></p>
                             </div>
                         </div>
                     </td>