fix: unblock page rendering when Telegram CDN is unavailable

- Google Fonts: non-render-blocking via media="print" onload trick
- telegram-web-app.js: load only inside Telegram environment
- Telegram SDK init: skip entirely outside Telegram
- Script load timeout: 8000ms → 2000ms for faster deep link fallback
- Email login form: expanded by default (80% of registrations)

src/pages/Login.tsx

@@ -64,7 +64,7 @@ export default function Login() {
   const [forgotPasswordSent, setForgotPasswordSent] = useState(false);
   const [forgotPasswordLoading, setForgotPasswordLoading] = useState(false);
   const [forgotPasswordError, setForgotPasswordError] = useState('');
-  const [showEmailForm, setShowEmailForm] = useState(() => !!referralCode);
+  const [showEmailForm, setShowEmailForm] = useState(true);
 
   // Telegram safe area insets
   const { safeAreaInset, contentSafeAreaInset } = useTelegramSDK();