perf: 优化任务执行速度 (40-70s → ~15s)

问题：容错机制引入了大量叠加的等待时间

优化内容：
- playwright_automation.py:
  - 登录超时 30s → 10s
  - 导航等待 2s → 0.5s
  - navigate_only 等待 1s → 0.3s
  - 首页轮询 8次×3s → networkidle + 2次×0.5s
- services/tasks.py:
  - 删除截图前固定 sleep(2)
- services/screenshots.py:
  - networkidle 超时 30s → 10s
  - selector 超时 20s → 5s

预计性能提升：从 40-70 秒降至约 15 秒

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

playwright_automation.py

@@ -424,7 +424,7 @@ class PlaywrightAutomation:
 
             # 等待跳转
             # self.log("等待登录处理...")  # 精简日志
-            self.page.wait_for_load_state('networkidle', timeout=30000)  # 增加到30秒
+            self.page.wait_for_load_state('networkidle', timeout=10000)  # 优化为10秒
 
             # 检查登录结果
             current_url = self.page.url
@@ -823,7 +823,7 @@ class PlaywrightAutomation:
             self.log(f"导航到 '{browse_type}' 页面...")
             try:
                 # 等待页面完全加载
-                time.sleep(2)
+                time.sleep(0.5)
                 self.log(f"当前URL: {self.main_page.url}")
             except Exception as e:
                 self.log(f"获取URL失败: {str(e)}")
@@ -835,7 +835,7 @@ class PlaywrightAutomation:
             
             # 如果只是导航（用于截图），切换完成后直接返回
             if navigate_only:
-                time.sleep(1)  # 等待页面稳定
+                time.sleep(0.3)  # 等待页面稳定
                 result.success = True
                 return result
             
@@ -867,27 +867,21 @@ class PlaywrightAutomation:
                 except Exception:  # Bug fix: 明确捕获Exception
                     self.log("等待表格超时，继续尝试...")
 
-                # 额外等待，确保AJAX内容加载完成
-                # 第一页等待更长时间，因为是首次加载（并发时尤其<E5B0A4><E585B6><EFBFBD>要）
-                if current_page == 1 and total_items == 0:
-                    time.sleep(3.0)
-                else:
-                    time.sleep(1.0)
+                # 等待页面网络空闲，确保AJAX加载完成
+                try:
+                    self.page.wait_for_load_state('networkidle', timeout=5000)
+                except Exception:
+                    pass  # 超时继续，不阻塞
 
-                # 获取内容行数量（带重试机制，避免AJAX加载慢导致误判）
-                # 第一页使用更多重试次数（8次×3秒=24秒），处理高并发时的慢加载
-                # 后续页使用3次×1.5秒=4.5秒
-                max_retries = 8 if (current_page == 1 and total_items == 0) else 3
-                retry_wait = 3.0 if (current_page == 1 and total_items == 0) else 1.5
+                # 获取内容行数量（简化重试：2次快速检测）
                 rows_count = 0
-                for retry in range(max_retries):
+                for retry in range(2):
                     rows_locator = self.page.locator("//table[@class='ltable']/tbody/tr[position()>1 and count(td)>=5]")
                     rows_count = rows_locator.count()
                     if rows_count > 0:
                         break
-                    if retry < max_retries - 1:
-                        self.log(f"未检测到内容，等待后重试... ({retry+1}/{max_retries})")
-                        time.sleep(retry_wait)
+                    if retry == 0:
+                        time.sleep(0.5)  # 仅重试一次，等待0.5秒
 
                 if rows_count == 0:
                     self.log("当前页面没有内容")

services/screenshots.py

@@ -130,11 +130,11 @@ def take_screenshot_for_account(
                         if "center.aspx" not in current_url:
                             raise RuntimeError(f"unexpected_iframe_url:{current_url}")
                         try:
-                            iframe.wait_for_load_state("networkidle", timeout=30000)
+                            iframe.wait_for_load_state("networkidle", timeout=10000)
                         except Exception:
                             pass
                         try:
-                            iframe.wait_for_selector("table.ltable", timeout=20000)
+                            iframe.wait_for_selector("table.ltable", timeout=5000)
                         except Exception:
                             pass
                     else:
@@ -144,11 +144,11 @@ def take_screenshot_for_account(
                         if "center.aspx" not in current_url:
                             raise RuntimeError(f"unexpected_url:{current_url}")
                         try:
-                            automation.main_page.wait_for_load_state("networkidle", timeout=30000)
+                            automation.main_page.wait_for_load_state("networkidle", timeout=10000)
                         except Exception:
                             pass
                         try:
-                            automation.main_page.wait_for_selector("table.ltable", timeout=20000)
+                            automation.main_page.wait_for_selector("table.ltable", timeout=5000)
                         except Exception:
                             pass
                     navigated = True

services/tasks.py

@@ -857,7 +857,6 @@ def run_task(user_id, account_id, browse_type, enable_screenshot=True, source="m
                             },
                         },
                     )
-                    time.sleep(2)
                     browse_result_dict = {"total_items": result.total_items, "total_attachments": result.total_attachments}
                     screenshot_submitted = True
                     threading.Thread(