优化代理获取和登录逻辑

- 每个账号独立获取代理，不再共用一个代理IP
- 代理预检失败只标记该账号失败，不终止整个批次
- 代理验证改为并发：verify_proxies_concurrent 多IP同时验证
- resolve_working_proxy 多IP并发验证，找到可用即返回
- parse_proxy_response 改为返回列表，支持多行/逗号分隔
- 邮箱验证码匹配收件人地址，防止多账号并发取错验证码
- 修正 mail.bdhg.xyz 旧数据端口和SSL配置
- bdhg.xyz 默认配置改为 143端口非SSL

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

core/douyu/proxy.py

@@ -164,6 +164,51 @@ def verify_proxy_url(proxy_url: str, timeout: tuple = (4, 6)) -> tuple[bool, str
     return False, '代理验证失败（所有目标不可达）'
 
 
+def verify_proxies_concurrent(proxy_urls: list[str], timeout: tuple = (4, 6), max_workers: int = 5) -> tuple[Optional[str], str]:
+    """
+    并发验证多个代理URL，返回第一个可用的。
+
+    Args:
+        proxy_urls: 代理URL列表
+        timeout: 验证超时
+        max_workers: 最大并发数
+
+    Returns:
+        (可用的代理URL, 消息)
+    """
+    if not proxy_urls:
+        return None, '无代理可验证'
+
+    if len(proxy_urls) == 1:
+        ok, msg = verify_proxy_url(proxy_urls[0], timeout)
+        if ok:
+            return proxy_urls[0], msg
+        return None, msg
+
+    from concurrent.futures import ThreadPoolExecutor, as_completed
+
+    with ThreadPoolExecutor(max_workers=min(max_workers, len(proxy_urls))) as executor:
+        future_map = {
+            executor.submit(verify_proxy_url, p, timeout): p
+            for p in proxy_urls
+        }
+        for future in as_completed(future_map):
+            proxy_url = future_map[future]
+            try:
+                ok, msg = future.result()
+                if ok:
+                    logger.success(f"并发验证找到可用代理: {proxy_url}")
+                    # 取消剩余任务
+                    for f in future_map:
+                        if f != future:
+                            f.cancel()
+                    return proxy_url, msg
+            except Exception:
+                continue
+
+    return None, f'共 {len(proxy_urls)} 个代理均不可用'
+
+
 def resolve_working_proxy(
     api_url: str,
     whitelist_uid: str = "",
@@ -210,14 +255,12 @@ def resolve_working_proxy(
             proxy_urls, whitelist_ip = parse_proxy_response(text)
 
             if proxy_urls:
-                log('info', f'获取到 {len(proxy_urls)} 个代理，逐一验证')
-                for proxy_url in proxy_urls:
-                    ok, msg = verify_proxy_url(proxy_url)
-                    if ok:
-                        log('success', f'代理预检成功: {proxy_url}')
-                        return proxy_url, msg
-                    log('warning', f'代理 {proxy_url} 不可用: {msg}')
-                last_error = f'共 {len(proxy_urls)} 个代理均不可用'
+                log('info', f'获取到 {len(proxy_urls)} 个代理，并发验证')
+                proxy_url, msg = verify_proxies_concurrent(proxy_urls)
+                if proxy_url:
+                    log('success', f'代理预检成功: {proxy_url}')
+                    return proxy_url, msg
+                last_error = msg
                 log('warning', f'代理预检 {attempt}/{max_attempts}: {last_error}')
                 continue