Window border on Linux

src-web/components/DefaultLayout.tsx

@@ -2,12 +2,22 @@ import { Outlet } from 'react-router-dom';
 import { DialogProvider } from './DialogContext';
 import { GlobalHooks } from './GlobalHooks';
 import { ToastProvider } from './ToastContext';
+import classNames from 'classnames';
+import { useOsInfo } from '../hooks/useOsInfo';
 
 export function DefaultLayout() {
+  const osInfo = useOsInfo();
   return (
     <DialogProvider>
       <ToastProvider>
-        <Outlet />
+        <div
+          className={classNames(
+            'w-full h-full',
+            osInfo?.osType === 'linux' && 'border border-background-highlight-secondary',
+          )}
+        >
+          <Outlet />
+        </div>
         <GlobalHooks />
       </ToastProvider>
     </DialogProvider>