fix: add card detail and store transactions endpoints for loyalty terminal

- Fix GET /cards/{card_id} 500 error (program_type → loyalty_type)
- Add GET /transactions endpoint for store-wide recent transactions
- Add get_store_transactions service method (merchant-scoped, store-filterable)

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

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

@@ -346,7 +346,7 @@ def get_card_detail(
         merchant_name=card.merchant.name if card.merchant else None,
         qr_code_data=card.qr_code_data or card.card_number,
         program_name=program.display_name,
-        program_type=program.program_type,
+        program_type=program.loyalty_type,
         reward_description=program.stamps_reward_description,
         stamp_count=card.stamp_count,
         stamps_target=program.stamps_target,
@@ -367,6 +367,27 @@ def get_card_detail(
     )
 
 
+@store_router.get("/transactions", response_model=TransactionListResponse)
+def list_store_transactions(
+    skip: int = Query(0, ge=0),
+    limit: int = Query(10, ge=1, le=100),
+    current_user: User = Depends(get_current_store_api),
+    db: Session = Depends(get_db),
+):
+    """List recent transactions for this merchant's loyalty program."""
+    store_id = current_user.token_store_id
+    merchant_id = get_store_merchant_id(db, store_id)
+
+    transactions, total = card_service.get_store_transactions(
+        db, merchant_id, skip=skip, limit=limit
+    )
+
+    return TransactionListResponse(
+        transactions=[TransactionResponse.model_validate(t) for t in transactions],
+        total=total,
+    )
+
+
 def _build_card_lookup_response(card, db=None) -> CardLookupResponse:
     """Build a CardLookupResponse from a card object."""
     from datetime import timedelta