feat: deprecate email, pre-verify users + documentation

backend/apps/salons/serializers.py

@@ -26,9 +26,7 @@ class StaffSerializer(serializers.ModelSerializer):
         fields = ["id", "name", "title", "bio", "is_active"]
 
     def get_name(self, obj):
-        first = obj.user.first_name or ""
-        last = obj.user.last_name or ""
-        return (first + " " + last).strip() or obj.user.email
+        return obj.user.display_name
 
 
 class ReviewSerializer(serializers.ModelSerializer):
@@ -39,9 +37,7 @@ class ReviewSerializer(serializers.ModelSerializer):
         fields = ["id", "rating", "comment", "created_at", "customer_name"]
 
     def get_customer_name(self, obj):
-        first = obj.customer.first_name or ""
-        last = obj.customer.last_name or ""
-        return (first + " " + last).strip() or obj.customer.email
+        return obj.customer.display_name
 
 
 class SalonSerializer(serializers.ModelSerializer):