browser.open 增加瞬时连接错误自动重试(ERR_EMPTY_RESPONSE等，最多2次，间隔2s/4s)，应对目标服务重启窗口导致的偶发导航失败

browser.py

@@ -3,6 +3,7 @@
 import json
 import os
 import subprocess
+import time
 
 from config import AGENT_BROWSER, NODE_BIN_DIR, XDG_RUNTIME_DIR
 
@@ -43,8 +44,27 @@ class AgentBrowser:
                 pass
         return out
 
-    def open(self, url, timeout=60):
-        return self._run(['open', url], timeout=timeout, check=True)
+    # 瞬时网络故障(服务重启/端口切换等)会自动重试的错误特征
+    RETRYABLE_ERRS = (
+        'ERR_EMPTY_RESPONSE', 'ERR_CONNECTION_REFUSED',
+        'ERR_CONNECTION_RESET', 'ERR_CONNECTION_CLOSED',
+        'ERR_TIMED_OUT', 'ERR_NAME_NOT_RESOLVED', 'ERR_SOCKET_NOT_CONNECTED',
+        'ERR_ADDRESS_UNREACHABLE', 'ERR_NETWORK_CHANGED', 'ERR_INTERNET_DISCONNECTED',
+    )
+
+    def open(self, url, timeout=60, retries=2):
+        """打开页面；对瞬时连接类错误自动重试(默认最多重试 2 次，间隔 2s/4s)"""
+        last_err = None
+        for attempt in range(retries + 1):
+            try:
+                return self._run(['open', url], timeout=timeout, check=True)
+            except BrowserError as e:
+                last_err = e
+                if attempt < retries and any(t in str(e) for t in self.RETRYABLE_ERRS):
+                    time.sleep(2 * (attempt + 1))
+                    continue
+                raise
+        raise last_err
 
     def snapshot(self, interactive=True, compact=False, depth=None, timeout=60):
         args = ['snapshot']