fix: 使用JavaScript展开iframe高度以截取完整内容

在截图前通过JavaScript动态调整iframe及其父容器的高度，使其能够显示全部内容。

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

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

playwright_automation.py

@@ -1361,37 +1361,37 @@ class PlaywrightAutomation:
             # 先保存到临时文件
             temp_filepath = filepath + '.tmp'
 
-            # 获取iframe
-            iframe = self.get_iframe_safe()
-            if iframe:
-                # 尝试截取iframe内的主要内容区域
+            # 尝试展开iframe以显示全部内容
             try:
-                    # 查找内容表格
-                    table_locator = iframe.locator("table.ltable")
-                    if table_locator.count() > 0:
-                        table_locator.first.screenshot(
-                            path=temp_filepath,
-                            type='jpeg',
-                            quality=100
-                        )
-                    else:
-                        # 如果没有表格，截取整个body内容
-                        iframe.locator("body").screenshot(
-                            path=temp_filepath,
-                            type='jpeg',
-                            quality=100
-                        )
-                except Exception as e:
-                    self.log(f"元素截图失败: {e}，尝试全页截图")
-                    # 回退到iframe全页截图
-                    iframe.screenshot(
-                        path=temp_filepath,
-                        type='jpeg',
-                        full_page=True,
-                        quality=100
-                    )
-            else:
-                # 如果无法获取iframe，回退到主页面截图
+                self.main_page.evaluate("""() => {
+                    const iframe = document.querySelector('iframe[name="mainframe"]');
+                    if (iframe) {
+                        try {
+                            const iframeDoc = iframe.contentDocument || iframe.contentWindow.document;
+                            const contentHeight = Math.max(
+                                iframeDoc.body.scrollHeight,
+                                iframeDoc.documentElement.scrollHeight,
+                                2000
+                            );
+                            iframe.style.height = contentHeight + 'px';
+                            iframe.style.minHeight = contentHeight + 'px';
+                            iframe.style.maxHeight = 'none';
+                            // 调整父容器
+                            let parent = iframe.parentElement;
+                            while (parent && parent !== document.body) {
+                                parent.style.height = 'auto';
+                                parent.style.maxHeight = 'none';
+                                parent.style.overflow = 'visible';
+                                parent = parent.parentElement;
+                            }
+                        } catch(e) {}
+                    }
+                }""")
+                time.sleep(0.5)
+            except Exception:
+                pass
+
+            # 截取整个页面
             self.main_page.screenshot(
                 path=temp_filepath,
                 type='jpeg',