Enable dual-device login and mobile APK update checks

front/src/components/ui/card.test.tsx

@@ -0,0 +1,11 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { renderToStaticMarkup } from 'react-dom/server';
+
+import { Card } from './card';
+
+test('Card applies the shared elevated shadow styling', () => {
+  const html = renderToStaticMarkup(<Card>demo</Card>);
+
+  assert.match(html, /shadow-\[0_12px_32px_rgba\(15,23,42,0\.18\)\]/);
+});

front/src/components/ui/card.tsx

@@ -8,7 +8,7 @@ const Card = React.forwardRef<
   <div
     ref={ref}
     className={cn(
-      "glass-panel rounded-2xl text-white shadow-sm",
+      "glass-panel rounded-2xl text-white shadow-[0_12px_32px_rgba(15,23,42,0.18)]",
       className
     )}
     {...props}