test: add loyalty module tests for today's bug fixes

Covers card lookup route ordering, func.replace normalization, customer
name in transactions, self-enrollment creation, and earn points endpoint.
54 tests total (was 1).

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

app/modules/loyalty/tests/unit/test_schemas.py

@@ -0,0 +1,75 @@
+"""Unit tests for loyalty schemas."""
+
+from datetime import UTC, datetime
+
+import pytest
+
+from app.modules.loyalty.schemas.card import (
+    CardEnrollRequest,
+    TransactionResponse,
+)
+
+
+@pytest.mark.unit
+@pytest.mark.loyalty
+class TestCardEnrollRequest:
+    """Tests for enrollment request schema validation."""
+
+    def test_valid_with_email(self):
+        """Email-only enrollment is valid."""
+        req = CardEnrollRequest(email="test@example.com")
+        assert req.email == "test@example.com"
+        assert req.customer_id is None
+
+    def test_valid_with_customer_id(self):
+        """Customer ID enrollment is valid."""
+        req = CardEnrollRequest(customer_id=42)
+        assert req.customer_id == 42
+        assert req.email is None
+
+    def test_self_enrollment_fields(self):
+        """Self-enrollment accepts name, phone, birthday."""
+        req = CardEnrollRequest(
+            email="self@example.com",
+            customer_name="Jane Doe",
+            customer_phone="+352123456",
+            customer_birthday="1990-01-15",
+        )
+        assert req.customer_name == "Jane Doe"
+        assert req.customer_phone == "+352123456"
+        assert req.customer_birthday == "1990-01-15"
+
+
+@pytest.mark.unit
+@pytest.mark.loyalty
+class TestTransactionResponse:
+    """Tests for transaction response schema."""
+
+    def test_customer_name_field_defaults_none(self):
+        """customer_name field exists and defaults to None."""
+        now = datetime.now(UTC)
+        tx = TransactionResponse(
+            id=1,
+            card_id=1,
+            transaction_type="points_earned",
+            stamps_delta=0,
+            points_delta=50,
+            transaction_at=now,
+            created_at=now,
+        )
+        assert tx.customer_name is None
+
+    def test_customer_name_can_be_set(self):
+        """customer_name can be explicitly set."""
+        now = datetime.now(UTC)
+        tx = TransactionResponse(
+            id=1,
+            card_id=1,
+            transaction_type="card_created",
+            stamps_delta=0,
+            points_delta=0,
+            customer_name="John Doe",
+            transaction_at=now,
+            created_at=now,
+        )
+        assert tx.customer_name == "John Doe"