fix(douyu): 精英宝典兑换等斗鱼任务接入代理 — 此前全部裸连

问题: DouyuBatchRunner/_client 创建的 DouyuActivityClient 无 proxies,
trust_env=False 下斗鱼任务(精英宝典兑换/和平小店/电竞/送礼等全部 45 个
请求点)直连本机出口 IP, 代理配置页形同虚设。

- activity_client: __init__ 支持 proxies (session 级, 一次覆盖全部请求)
- douyu_runner: 装载全局代理配置 (与 CK 检测/虎牙注册同源 代理配置页):
  · 静态模式: 配置页手填 http/https → 全任务同一代理
  · API 模式: 每任务从代理 API 取新代理 (ProxyFetcher, 含白名单同步,
    1.5s 最小间隔防打爆), 失败降级直连并推送告警日志
- 验证: 77 单测 OK; 三种模式(静态/API/关闭)行为断言通过

web/backend/services/douyu_runner.py

@@ -22,8 +22,9 @@ from core.douyu import (
     FishFinRechargeError,
 )
 
+from core.douyu.proxy_fetcher import ProxyFetcher
 from ..database import SessionLocal
-from ..models import Account, DouyuEsportsGoodsSnapshot, DouyuGoodsSnapshot, DouyuTask, DouyuXpdGoodsSnapshot
+from ..models import Account, DouyuEsportsGoodsSnapshot, DouyuGoodsSnapshot, DouyuTask, DouyuXpdGoodsSnapshot, ProxyConfig as ProxyConfigModel
 from .douyu_service import (
     DOUYU_CONFIG_FIELDS,
     account_uid,
@@ -72,6 +73,55 @@ class DouyuBatchRunner:
         self._stop = threading.Event()
         self._counter_lock = threading.Lock()
         self._started = 0
+        # 代理接入 (与 CK 检测/虎牙注册同一配置源): 代理配置页开启后,
+        # 斗鱼任务(含精英宝典兑换)的出网请求统一走代理, 不再裸连
+        self._proxy_cfg = db.query(ProxyConfigModel).first() if db else None
+        self._proxy_fetcher = self._create_proxy_fetcher()
+        self._static_proxies = self._resolve_static_proxies()
+        if self._static_proxies:
+            logger.info(f"[douyu] 任务将走静态代理: {self._static_proxies.get('https','')}")
+        elif self._proxy_fetcher:
+            logger.info("[douyu] 任务将按任务从代理 API 取新代理")
+
+    def _create_proxy_fetcher(self) -> ProxyFetcher | None:
+        """API 代理模式: 每个任务从代理 API 取 1 个新代理 (与虎牙注册链同款)."""
+        cfg = self._proxy_cfg
+        if not cfg or not cfg.enabled or not cfg.api_url:
+            return None
+        wl_platform = getattr(cfg, "whitelist_platform", None) or "xiequ"
+        wl_credentials = getattr(cfg, "whitelist_credentials", None)
+        if not wl_credentials and getattr(cfg, "whitelist_uid", "") and getattr(cfg, "whitelist_ukey", ""):
+            wl_credentials = {"uid": cfg.whitelist_uid, "ukey": cfg.whitelist_ukey}
+        return ProxyFetcher(
+            api_url=cfg.api_url,
+            whitelist_platform=wl_platform,
+            whitelist_credentials=wl_credentials if cfg.whitelist_enabled else None,
+            stop_event=self._stop,
+        )
+
+    def _resolve_static_proxies(self) -> dict[str, str] | None:
+        """静态代理模式: 代理配置页手填的 http/https 地址."""
+        cfg = self._proxy_cfg
+        if not cfg or not cfg.enabled:
+            return None
+        http, https = (cfg.http or "").strip(), (cfg.https or "").strip()
+        if not http and not https:
+            return None
+        return {"http": http or https, "https": https or http}
+
+    def _proxies_for_task(self) -> dict[str, str] | None:
+        """取本任务出网代理: 静态优先; API 模式每任务取新代理, 失败降级直连并告警."""
+        if self._static_proxies:
+            return self._static_proxies
+        if self._proxy_fetcher:
+            try:
+                proxy_url = self._proxy_fetcher.fetch_new_proxy()
+                if proxy_url:
+                    return {"http": proxy_url, "https": proxy_url}
+                self._push_log("warning", "代理 API 未返回可用代理, 本任务降级直连")
+            except Exception as exc:
+                self._push_log("warning", f"取代理失败, 本任务降级直连: {exc}")
+        return None
 
     def stop(self):
         self._stop.set()
@@ -876,7 +926,12 @@ class DouyuBatchRunner:
         return {**payload, **self.payload}
 
     def _client(self, cookie: str) -> DouyuActivityClient:
-        return DouyuActivityClient(cookie, logger=lambda msg: self._push_log("debug", msg))
+        """任务 HTTP 客户端: 会话级代理 (覆盖精英宝典/和平小店/电竞等全部请求)."""
+        return DouyuActivityClient(
+            cookie,
+            logger=lambda msg: self._push_log("debug", msg),
+            proxies=self._proxies_for_task(),
+        )
 
     def _fetch_bind_info_candidates(
         self,