baseline: 批次A-D 成果 + membership 半成品（测试红）

backend/apps/printing/serializers.py

@@ -0,0 +1,27 @@
+"""printing 序列化器。"""
+
+from rest_framework import serializers
+from apps.core.serializers import AsyncModelSerializer
+from .models import PrintSettings, PrintTemplate
+
+
+class PrintSettingsSerializer(AsyncModelSerializer):
+    class Meta:
+        model = PrintSettings
+        fields = [
+            "id", "company_name", "phone", "address",
+            "bank_info", "footer_note", "logo_url",
+            "created_at", "updated_at",
+        ]
+        read_only_fields = ["id", "created_at", "updated_at"]
+
+
+class PrintTemplateSerializer(AsyncModelSerializer):
+    class Meta:
+        model = PrintTemplate
+        fields = [
+            "id", "code", "name", "doc_type", "body_html",
+            "paper_size", "is_default",
+            "created_at", "updated_at",
+        ]
+        read_only_fields = ["id", "created_at", "updated_at"]