Update app/core/service/playwright/playwright_context.py

app/core/service/playwright/playwright_context.py

@@ -76,7 +76,7 @@ class PlaywrightInstance(AsyncMixin):
             "java_script_enabled": page_model.java_script_enabled,
             "no_viewport": page_model.no_viewport,
             "proxy": page_model.proxy.model_dump() if page_model.proxy else None,
-            "viewport": page_model.viewport,
+            "viewport": page_model.viewport.model_dump() if page_model.viewport else None,
         }
 
         if not screenshot_model.new_browser:
@@ -136,4 +136,4 @@ class PlaywrightInstance(AsyncMixin):
         if self.playwright:
             await self.browser.close()
             await self.playwright.stop()
-    
+