v1.7.2 修复慢加载页面报 'Operation timed out'：agent-browser 打开超时自动切 Playwright 重试

- 根因: agent-browser open 导航内部超时约30s(CDP command timed out: Page.navigate)，慢加载/持续加载页面(如资源挂起导致 load 事件永不触发)会报 Failed to open URL: Operation timed out
- agent-browser open 子进程超时 30s→45s，让其返回自己的超时报错而非被硬杀
- 超时判定放宽到 timed out/timeout 全变体，触发自动回退: capture_webpage 与 smart_capture 在 agent-browser 打开超时时自动切 Playwright 重试(domcontentloaded 更宽容，不等全部资源)
- Playwright goto domcontentloaded 超时 30s→60s
- 错误提示更友好(说明慢加载+已自动回退+建议)
- 实测: 挂起资源测试页 agent-browser 超时→playwright 成功, 耗时~39s; 正常页面无回归

app.py

@@ -315,7 +315,8 @@ class AgentBrowserSession:
         # 添加反爬虫检测的 User-Agent
         env = os.environ.copy()
         env['AGENT_BROWSER_USER_AGENT'] = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36'
-        return self.run(["open", url], timeout=30000)
+        # agent-browser 内部导航等待约 30s 超时，这里留足 45s 让它返回自己的超时报错（避免被 subprocess 硬杀）
+        return self.run(["open", url], timeout=45000)
     
     def set_viewport(self, width, height):
         """设置视口大小"""
@@ -410,6 +411,8 @@ def capture_with_agent_browser(
             # 检查是否是反爬虫拦截
             if "403" in stdout or "Access Denied" in stdout:
                 return {"success": False, "error": "网站反爬虫拦截 (403)，建议使用 Playwright 后端或手动添加请求头"}
+            if "timed out" in stderr.lower() or "timeout" in stderr.lower():
+                return {"success": False, "error": "页面加载超时（可能是慢加载/持续加载页面），已自动切换 Playwright 后端重试；若仍失败请增大等待时间或换其他后端"}
             return {"success": False, "error": f"Failed to open URL: {stderr}"}
         
         # 等待页面加载
@@ -595,7 +598,7 @@ async def capture_with_playwright(
                 await stealth_async(page)
             
             try:
-                await page.goto(url, wait_until="domcontentloaded", timeout=30000)
+                await page.goto(url, wait_until="domcontentloaded", timeout=60000)
             except Exception as e:
                 # 如果 domcontentloaded 超时，尝试 commit
                 try:
@@ -733,6 +736,8 @@ def smart_capture_agent_browser(url, cfg, wait_time, viewport):
         session.set_viewport(vw, vh)
         success, _, err = session.open(url)
         if not success:
+            if "timed out" in err.lower() or "timeout" in err.lower():
+                return {"success": False, "error": "页面加载超时（可能是慢加载/持续加载页面），已自动切换 Playwright 后端重试；若仍失败请增大等待时间或换其他后端"}
             return {"success": False, "error": f"打开网页失败: {err}"}
         session.wait(wait_time)
 
@@ -845,7 +850,7 @@ async def smart_capture_playwright(url, cfg, wait_time, viewport):
                 except Exception:
                     pass
             try:
-                await page.goto(url, wait_until="domcontentloaded", timeout=30000)
+                await page.goto(url, wait_until="domcontentloaded", timeout=60000)
             except Exception:
                 try:
                     await page.goto(url, wait_until="commit", timeout=30000)
@@ -945,7 +950,19 @@ def smart_capture(url, cfg, wait_time, viewport, backend="auto"):
         backend = "agent-browser" if AGENT_BROWSER_AVAILABLE else "playwright"
 
     if backend == "agent-browser":
-        return smart_capture_agent_browser(url, cfg, wait_time, viewport)
+        result = smart_capture_agent_browser(url, cfg, wait_time, viewport)
+        # 打开页面超时 → 自动切 Playwright 重试（domcontentloaded 更宽容）
+        if (not result.get("success")
+                and "自动切换 Playwright" in (result.get("error") or "")
+                and PLAYWRIGHT_AVAILABLE):
+            try:
+                loop = asyncio.new_event_loop()
+                asyncio.set_event_loop(loop)
+                result = loop.run_until_complete(smart_capture_playwright(url, cfg, wait_time, viewport))
+                loop.close()
+            except Exception as e:
+                return {"success": False, "error": str(e)}
+        return result
     elif backend == "playwright":
         try:
             loop = asyncio.new_event_loop()
@@ -991,6 +1008,22 @@ def capture_webpage(
             url, action, scroll_times, scroll_delay, full_page, viewport, wait_time
         )
         result["backend"] = "agent-browser"
+        # agent-browser 打开页面超时（慢加载/持续加载页）→ 自动切 Playwright 重试（domcontentloaded 更宽容）
+        if (not result.get("success")
+                and "自动切换 Playwright" in (result.get("error") or "")
+                and PLAYWRIGHT_AVAILABLE):
+            try:
+                loop = asyncio.new_event_loop()
+                asyncio.set_event_loop(loop)
+                result = loop.run_until_complete(
+                    capture_with_playwright(
+                        url, action, scroll_times, scroll_delay, full_page, viewport, wait_time
+                    )
+                )
+                loop.close()
+                result["backend"] = "playwright"
+            except Exception as e:
+                return {"success": False, "error": str(e)}
         return result
     
     elif backend == "playwright":