fix(douyu): 补齐拆分后支付轮询常量导入 + 代理三模式断言测试

- douyu_runner_manual/gold: 导入 core 的 DOUYU_PAYMENT_POLL_* 常量
  (之前仅在 douyu_runner.py 单文件内可见, 拆分后到账轮询会 NameError)
- 新增 tests/test_douyu_runner_proxy.py: 静态/API/关闭三模式 + 降级直连 +
  activity_client session 级 proxies, 兑现 8fe9fdf 提交说明中的行为断言

tests/test_douyu_runner_proxy.py

@@ -0,0 +1,102 @@
+"""斗鱼任务代理接入三模式行为测试（静态 / API / 关闭）。"""
+
+import os
+import unittest
+from unittest.mock import Mock
+
+os.environ.setdefault("DATABASE_URL", "sqlite://")
+os.environ.setdefault("APP_ENCRYPTION_KEY", "MDEyMzQ1Njc4OWFiY2RlZjAxMjM0NTY3ODlhYmNkZWY=")
+
+from core.douyu.activity_client import DouyuActivityClient
+from web.backend.services.douyu_runner import DouyuBatchRunner
+from web.backend.services.douyu_runner_core import DouyuBatchRunnerCore
+from web.backend.models import ProxyConfig
+
+
+def _cfg(**overrides) -> ProxyConfig:
+    values = {
+        "enabled": False,
+        "api_url": "",
+        "http": "",
+        "https": "",
+        "whitelist_enabled": False,
+        "whitelist_platform": "xiequ",
+        "whitelist_credentials": None,
+        "whitelist_uid": "",
+        "whitelist_ukey": "",
+    }
+    values.update(overrides)
+    cfg = ProxyConfig()
+    for key, value in values.items():
+        setattr(cfg, key, value)
+    return cfg
+
+
+def _runner(db_cfg: ProxyConfig):
+    db = Mock()
+    db.query.return_value.first.return_value = db_cfg
+    runner = DouyuBatchRunner.__new__(DouyuBatchRunner)
+    DouyuBatchRunnerCore.__init__(runner, db, "batch", "query_points")
+    return runner
+
+
+class DouyuProxyModeTests(unittest.TestCase):
+    def test_disabled_mode_goes_direct(self):
+        runner = _runner(_cfg(enabled=False))
+        self.assertIsNone(runner._proxies_for_task())
+        self.assertIsNone(runner._proxy_fetcher)
+        client = runner._client("acf_uid=100")
+        self.assertEqual(client.session.proxies, {})
+        # 未开启代理时 execute 客户端不带 proxies 参数
+        self.assertIsInstance(client, DouyuActivityClient)
+
+    def test_static_mode_uses_configured_proxies(self):
+        runner = _runner(_cfg(enabled=True, http="http://10.0.0.1:8080"))
+        proxies = runner._proxies_for_task()
+        self.assertEqual(proxies, {"http": "http://10.0.0.1:8080", "https": "http://10.0.0.1:8080"})
+        client = runner._client("acf_uid=100")
+        self.assertEqual(client.session.proxies["https"], "http://10.0.0.1:8080")
+        # 每次任务都取同一静态代理
+        self.assertEqual(runner._proxies_for_task(), proxies)
+
+    def test_api_mode_fetches_new_proxy_per_task(self):
+        cfg = _cfg(enabled=True, api_url="https://proxy-api.example/fetch")
+        runner = _runner(cfg)
+        self.assertIsNotNone(runner._proxy_fetcher)
+        fake = Mock()
+        fake.fetch_new_proxy.return_value = "http://10.0.0.2:3128"
+        runner._proxy_fetcher = fake
+
+        proxies = runner._proxies_for_task()
+        self.assertEqual(proxies, {"http": "http://10.0.0.2:3128", "https": "http://10.0.0.2:3128"})
+        client = runner._client("acf_uid=100")
+        self.assertEqual(client.session.proxies["http"], "http://10.0.0.2:3128")
+
+        # 每任务取新代理：_client 也会再 fetch 一次（客户端构造即取代理）
+        fake.fetch_new_proxy.return_value = "http://10.0.0.3:3128"
+        self.assertEqual(runner._proxies_for_task()["http"], "http://10.0.0.3:3128")
+        self.assertEqual(fake.fetch_new_proxy.call_count, 3)
+
+    def test_api_mode_failure_falls_back_to_direct(self):
+        runner = _runner(_cfg(enabled=True, api_url="https://proxy-api.example/fetch"))
+        runner._proxy_fetcher = Mock()
+        runner._proxy_fetcher.fetch_new_proxy.return_value = None
+        runner._push_log = Mock()
+
+        self.assertIsNone(runner._proxies_for_task())
+        client = runner._client("acf_uid=100")
+        self.assertEqual(client.session.proxies, {})
+        runner._push_log.assert_called()
+
+    def test_activity_client_accepts_proxies_at_session_level(self):
+        client = DouyuActivityClient(
+            "acf_uid=100",
+            proxies={"http": "http://10.0.0.9:7890", "https": "http://10.0.0.9:7890"},
+        )
+        self.assertEqual(client.session.proxies["http"], "http://10.0.0.9:7890")
+        # trust_env=False 维持不变：不受环境变量代理影响
+        self.assertFalse(client.session.trust_env)
+
+
+if __name__ == "__main__":
+    unittest.main()

web/backend/services/douyu_runner_gold.py

@@ -10,6 +10,7 @@ from sqlalchemy.orm import Session
 from core.douyu import DouyuActivityClient, FishFinRechargeClient, FishFinRechargeConfig, FishFinRechargeError
 from ..models import Account, DouyuTask
 from .douyu_service import update_account_profile_from_cookie
+from .douyu_runner_core import DOUYU_PAYMENT_POLL_INTERVAL, DOUYU_PAYMENT_POLL_SECONDS
 
 class GoldMixin:
     """鱼翅充值域：扫码充值、供应商直充与到账轮询。"""

web/backend/services/douyu_runner_manual.py

@@ -8,6 +8,7 @@ from sqlalchemy.orm import Session
 from core.douyu import DouyuActivityClient, DouyuActivityError
 from ..models import Account, DouyuTask
 from .douyu_service import account_uid, update_account_profile_from_cookie
+from .douyu_runner_core import DOUYU_PAYMENT_POLL_INTERVAL, DOUYU_PAYMENT_POLL_SECONDS
 
 class ManualMixin:
     """手册域：精英/电竞手册开通支付、积分查询与到账轮询。"""