[C#]: 热区判定调整

[Xenon-114]

检查项 / Checklist

• 我已在 Issues 页面 中搜索，确认了这一建议未在社区版被提交过 / I have searched the Issues page and confirmed that this suggestion has not been submitted to the Community Edition yet.
• 我确认只是全部选中而没有仔细确认就直接提交了这个 Issue，并且同意这个 Issue 可以直接被关闭 / I confirm that I checked all boxes without carefully reading them, and agree that this issue may be closed directly.
• 我确认我所描述的改进是现实的、有理有据的，而不是我临时起意的 / I confirm that the improvement I describe is realistic, reasonable, and well-justified, rather than something I came up with on a whim.
• 我已知悉社区不对这类 Issue 的完成时间作出任何保证，并有足够的耐心等待社区开发者的处理，同时已知悉如果我作出催促、质问或类似的举动，这个 Issue 可能会被直接关闭 / I understand that the community does not guarantee any completion time for this type of issue, and I am willing to wait patiently for the community developers' review and handling. I also understand that excessive urging, demanding, or similar behavior may result in this issue being closed.

描述 / Description

（我翻了一遍Issue没找到类似的建议，要是有的话我也同意将这个Issue关闭）
如视频所示，热区判断存在问题

202607082040.mp4

由于该功能不记录日志，我无法提供日志。

只需要做如下修改，即可修复该问题：

private nint _SizeWndProc(...)
{
    ...
    // 判定是否命中偏移后的热区
    //var inLeft = relX >= offsetPxX && relX <= offsetPxX + hitWidthPxX;
    //var inRight = relX <= w - offsetPxX && relX >= w - offsetPxX - hitWidthPxX;
    //var inTop = relY >= offsetPxY && relY <= offsetPxY + hitWidthPxY;
    //var inBottom = relY <= h - offsetPxY && relY >= h - offsetPxY - hitWidthPxY;
    var inLeft = relX >= offsetPxX && relX <= offsetPxX + hitWidthPxX             && (relY >= offsetPxY && relY <= h - offsetPxY);
    var inRight = relX <= w - offsetPxX && relX >= w - offsetPxX - hitWidthPxX    && (relY >= offsetPxY && relY <= h - offsetPxY);
    var inTop = relY >= offsetPxY && relY <= offsetPxY + hitWidthPxY              && (relX >= offsetPxX && relX <= w - offsetPxX);
    var inBottom = relY <= h - offsetPxY && relY >= h - offsetPxY - hitWidthPxY   && (relX >= offsetPxX && relX <= w - offsetPxX);
    ...
}

原因 / Reason

虽然它不算很影响操作，但我认为这样可以让它用起来更顺手
而且修复也很简单......只要添加几个判定就好了......