feat(loyalty): add paginated transaction history to card detail

The store card detail page now shows paginated transaction history
instead of a flat list of 50. Uses PlatformSettings.getRowsPerPage()
for the page size (default 20), with Previous/Next navigation and
"Page X of Y" indicator using server-rendered i18n.

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

app/modules/loyalty/locales/en.json

@@ -761,7 +761,8 @@
             "col_location": "Location",
             "col_notes": "Notes",
             "no_transactions": "No transactions yet",
-            "card_label": "Card"
+            "card_label": "Card",
+            "page_x_of_y": "Page {page} of {pages}"
         },
         "enroll": {
             "title": "Enroll Customer",