Always show window controls, and open Linux settings in dialog

src-web/hooks/useStoplightsVisible.ts

@@ -0,0 +1,9 @@
+import { useIsFullscreen } from './useIsFullscreen';
+import { useOsInfo } from './useOsInfo';
+
+export function useStoplightsVisible() {
+  const platform = useOsInfo();
+  const fullscreen = useIsFullscreen();
+  const stoplightsVisible = platform?.osType === 'macos' && !fullscreen;
+  return stoplightsVisible;
+}