adding

apps/messaging/api/serializers.py

@@ -45,3 +45,18 @@ class BulkMessageSerializer(serializers.ModelSerializer):
     def get_needs_manual(self, obj: BulkMessage):
         pending = obj.recipients.filter(status=MessageRecipient.Status.NEEDS_MANUAL)
         return MessageRecipientSerializer(pending, many=True).data
+
+
+class ContactMessageHistorySerializer(serializers.ModelSerializer):
+    """یک ردیفِ تاریخچه — متنِ واقعیِ فرستاده‌شده، کانال، وضعیت و زمان."""
+
+    sent_at = serializers.DateTimeField(source="bulk_message.created_at", read_only=True)
+    channel_display = serializers.CharField(source="get_channel_display", read_only=True)
+    status_display = serializers.CharField(source="get_status_display", read_only=True)
+
+    class Meta:
+        model = MessageRecipient
+        fields = [
+            "id", "channel", "channel_display", "status", "status_display",
+            "rendered_body", "error", "sent_at",
+        ]