fix(loyalty): card detail — enrolled store name + copy buttons

- Fix "Enrolled at: Unknown" by resolving enrolled_at_store_name from
  the store service and adding it to CardDetailResponse schema.
- Add clipboard-copy buttons next to card number, customer name,
  email, and phone fields using the shared Utils.copyToClipboard()
  utility with toast feedback.

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

app/modules/loyalty/routes/api/store.py

@@ -514,6 +514,17 @@ def get_card_detail(
     program = card.program
     customer = card.customer
 
+    # Resolve enrolled store name
+    enrolled_store_name = None
+    if card.enrolled_at_store_id:
+        from app.modules.tenancy.services.store_service import store_service
+
+        enrolled_store = store_service.get_store_by_id_optional(
+            db, card.enrolled_at_store_id
+        )
+        if enrolled_store:
+            enrolled_store_name = enrolled_store.name
+
     return CardDetailResponse(
         id=card.id,
         card_number=card.card_number,
@@ -521,6 +532,7 @@ def get_card_detail(
         merchant_id=card.merchant_id,
         program_id=card.program_id,
         enrolled_at_store_id=card.enrolled_at_store_id,
+        enrolled_at_store_name=enrolled_store_name,
         customer_name=customer.full_name if customer else None,
         customer_email=customer.email if customer else None,
         merchant_name=card.merchant.name if card.merchant else None,