支持复用色花堂常驻浏览器会话

- 为 sehuatang_push 增加远程调试端口附着能力，优先复用常驻 Chrome 浏览器\n- 区分外部浏览器与自管理浏览器，避免任务结束时误关闭用户正在使用的浏览器\n- 从插件配置和任务 payload 读取浏览器复用参数，并补充 browser 配置项说明

plugins/sehuatang_push/main.py

@@ -46,6 +46,23 @@ class SehuatangPushPlugin(MessagePluginInterface):
         super().__init__()
         self.feature = self.register_feature()
 
+    def _build_browser_config(self, payload: Dict[str, Any]) -> Dict[str, Any]:
+        """整理浏览器配置，优先读取插件配置，再允许任务 payload 做局部覆盖。"""
+        # 这里把浏览器连接参数集中整理出来，
+        # 目的是让调度入口不需要关心太多细节，同时兼容后续从后台任务动态覆盖端口。
+        browser_cfg = dict(self._config.get("browser", {}) or {})
+
+        if "reuse_existing_browser" in payload:
+            browser_cfg["reuse_existing_browser"] = payload.get("reuse_existing_browser")
+        if "debugger_host" in payload:
+            browser_cfg["debugger_host"] = payload.get("debugger_host")
+        if "debugger_port" in payload:
+            browser_cfg["debugger_port"] = payload.get("debugger_port")
+        if "allow_launch_fallback" in payload:
+            browser_cfg["allow_launch_fallback"] = payload.get("allow_launch_fallback")
+
+        return browser_cfg
+
     def initialize(self, context: Dict[str, Any]) -> bool:
         return True
 
@@ -94,11 +111,15 @@ class SehuatangPushPlugin(MessagePluginInterface):
 
         payload = context.get("payload") or {}
         at_user = str(payload.get("at_user", "Jyunere") or "Jyunere").strip()
+        browser_config = self._build_browser_config(payload)
+        strict_reuse_existing_browser = bool(browser_config.get("reuse_existing_browser")) and not bool(
+            browser_config.get("allow_launch_fallback", True)
+        )
 
         # 兼容历史逻辑：优先使用 undetected 方案，失败后回退普通抓取。
         try:
-            ok, path = await asyncio.to_thread(pdf_file_path_undetected)
-            if not ok:
+            ok, path = await asyncio.to_thread(pdf_file_path_undetected, browser_config)
+            if not ok and not strict_reuse_existing_browser:
                 ok, path = await asyncio.to_thread(pdf_file_path)
             if not ok:
                 return {"success": False, "summary": "PDF 生成失败", "detail": {}}