fix: restore PWA install button visibility

src/components/Layout/TopBarNew.jsx

@@ -543,16 +543,14 @@ export default function TopBarNew({ theme = "dark", onChangeTheme, onIslandsClic
             onClick={() => authenticated && onUserIsland?.(username)}
           />
 
-          {/* PWA Install - hide on very small screens */}
+          {/* PWA Install */}
           {showInstallBtn && (
-            <div className="hidden xs:block">
             <ActionButton
               icon="fa-solid fa-download"
               color="purple"
               onClick={() => promptInstall()}
               title={t('topbar.installApp')}
             />
-            </div>
           )}
 
           {/* Theme - mobile only */}