fix(playwright): 确保浏览器 headless 模式参数为布尔类型

- 在启动浏览器时，检查 headless 参数的类型
- 如果 headless 参数为字符串类型，将其转换为布尔类型
- 支持 "true", "1", "yes", "on"

backend/app/core/playwright_manager.py

@@ -152,6 +152,14 @@ class DistributedPlaywrightManager:
                 launch_options = cls._get_k8s_optimized_launch_options()
                 launch_options.update(kwargs)  # 允许外部覆盖参数
 
+                # 确保headless参数是布尔类型
+                if "headless" in launch_options:
+                    headless_value = launch_options["headless"]
+                    if isinstance(headless_value, str):
+                        launch_options["headless"] = headless_value.lower() in ("true", "1", "yes", "on")
+                    elif not isinstance(headless_value, bool):
+                        launch_options["headless"] = bool(headless_value)
+
                 logger.info("启动参数", launch_options=launch_options)
 
                 # 启动Chromium浏览器