feat(sites): auto-screenshot on final download failure for debugging

所有站点 with_retry 在最后一次重试失败、reset 之前自动截图，
保存到 logs/screenshots/。网页站点走 Playwright page.screenshot()，
安能走 CDP Page.captureScreenshot。截图失败绝不阻塞任务流程。

- paths.py: 新增 SCREENSHOT_DIR (BASE_DIR/logs/screenshots/)
- runtime.py: 新增 capture_error_screenshot() 工具函数
- .gitignore: 新增 logs/ 忽略规则

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

inbound_verify/sites/anneng.py

@@ -43,10 +43,37 @@ from inbound_verify.paths import DOWNLOAD_DIR, CONFIG_PATH
 from inbound_verify import state_store
 
 
-def with_retry(site_name, label, flow, reset, max_attempts=3):
+def _capture_error_screenshot(site, kind, attempt, error):
+    """安能 CDP 错误截图（best-effort；失败仅告警，绝不外抛）。"""
+    try:
+        import base64, os
+        from datetime import datetime
+        from inbound_verify.paths import SCREENSHOT_DIR
+
+        os.makedirs(SCREENSHOT_DIR, exist_ok=True)
+        pages = list_pages()
+        if not pages:
+            return
+        cdp = CDP(pages[0]["webSocketDebuggerUrl"])
+        ts = datetime.now().strftime("%Y%m%d_%H%M%S")
+        err_short = (error or "unknown")[:40].replace("/", "_").replace("\\", "_")
+        fname = f"{site}_{kind}_{ts}_attempt{attempt}_{err_short}.png"
+        path = os.path.join(SCREENSHOT_DIR, fname)
+        result = cdp.call("Page.captureScreenshot", format="png")
+        with open(path, "wb") as f:
+            f.write(base64.b64decode(result["data"]))
+        cdp.close()
+        print(f"📸 【{site}-{kind}】错误截图已保存: {path}")
+    except Exception as se:
+        print(f"📸 【{site}-{kind}】截图失败（不影响任务）: {se}")
+
+
+def with_retry(site_name, label, flow, reset, max_attempts=3, page=None):
     """异常兜底：flow 失败 → 重置回初始态 → 重试，最多 max_attempts 次（含首次）。
 
     每次失败都重置（含最终放弃那一次）：既是重试前的清场，也保证最终放弃时环境干净。
+    最后一次失败时（重置前）自动截图保存到 logs/screenshots/，供问题排查。
+    （安能通过 CDP 截图，page 参数忽略；保留为统一签名兼容。）
     flow 为零参可调用；返回 False 视为失败，其余视为成功。
     返回 True=最终成功，False=重试耗尽放弃（供调度层判断任务成败）。
     """
@@ -60,6 +87,11 @@ def with_retry(site_name, label, flow, reset, max_attempts=3):
             return True
         except Exception as e:
             print(f"⚠️ 【{site_name}-{label}】第 {attempt}/{max_attempts} 次失败: {e}")
+            if attempt == max_attempts:
+                try:
+                    _capture_error_screenshot(site_name, label, attempt, str(e))
+                except Exception:
+                    pass
             print(f"   → 重置【{site_name}】到初始态，清理环境 ...")
             try:
                 reset()