feat: add xpd purchase records view

tests/test_douyu_xpd_exchange.py

@@ -106,6 +106,43 @@ class XpdExchangeTests(unittest.TestCase):
         self.assertEqual((first_params['page_begin'], first_params['page_num']), ('0', '1'))
         self.assertEqual((second_params['page_begin'], second_params['page_num']), ('10', '2'))
 
+    def test_purchase_records_parses_order_list_and_paginates(self):
+        first_record = {
+            'sSerialNum': 'order-1',
+            'dtBuyTime': '2026-08-08 01:00:42',
+            'dtPayTime': '2026-08-08 01:00:55',
+            'iStatus': '3',
+            'iPrice': '800',
+            'iPayAmount': '800',
+            'sRoleName': '测试角色',
+            'sGoodsInfo': json.dumps({
+                'list': [{'sGoodsName': '改名卡', 'sGoodsPic': 'https://cdn.example/item.jpg'}],
+            }),
+        }
+        self.client._request = Mock(side_effect=[
+            SimpleNamespace(text=f'var info={{"ret":"0","msg":"ok","data":{{"cnt":11,"list":{json.dumps([first_record])}}}}};'),
+            SimpleNamespace(text='var info={"ret":"0","msg":"ok","data":{"cnt":11,"list":[]}};'),
+        ])
+
+        result = self.client.xpd_purchase_records(
+            embed_query={
+                'gameId': 'cjm', 'actId': '18882', 'appId': 'bp_cf',
+                'livePlatId': 'douyu', 'code': 'fresh-code',
+                'timestamp': '123', 'v': '2.0', 'sig': 'fresh-signature',
+            },
+            act_id='46195',
+            page_size=1,
+        )
+
+        self.assertEqual(result['total'], 11)
+        self.assertEqual(result['records'][0]['goods_name'], '改名卡')
+        self.assertEqual(result['records'][0]['serial'], 'order-1')
+        self.assertEqual(self.client._request.call_count, 2)
+        params = self.client._request.call_args_list[0].kwargs['params']
+        self.assertEqual(params['_service'], 'order.list')
+        self.assertEqual(params['pn'], '1')
+        self.assertEqual(params['code'], 'fresh-code')
+
 
     def test_exchange_keeps_raw_price_from_goods_list(self):
         self.client._request = Mock(side_effect=[