fix: show proper transaction type labels on loyalty terminal

Replace naive points_delta > 0 check with actual transaction_type
labels. Previously card_created showed as "Redeemed" because
points_delta was 0. Now uses a label map matching all TransactionType
enum values with appropriate color coding.

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

app/modules/loyalty/templates/loyalty/store/terminal.html

@@ -235,11 +235,8 @@
                             <td class="px-4 py-3 text-sm" x-text="tx.customer_name || 'Unknown'"></td>
                             <td class="px-4 py-3">
                                 <span class="px-2 py-1 text-xs font-semibold rounded-full"
-                                      :class="{
-                                          'text-green-700 bg-green-100 dark:bg-green-700 dark:text-green-100': tx.points_delta > 0,
-                                          'text-orange-700 bg-orange-100 dark:bg-orange-700 dark:text-orange-100': tx.points_delta < 0
-                                      }"
-                                      x-text="tx.points_delta > 0 ? 'Earned' : 'Redeemed'"></span>
+                                      :class="getTransactionColor(tx)"
+                                      x-text="getTransactionLabel(tx)"></span>
                             </td>
                             <td class="px-4 py-3 text-sm text-right font-medium"
                                 :class="tx.points_delta > 0 ? 'text-green-600' : 'text-orange-600'"