feat: guest purchase cabinet credentials UI

- CabinetCredentialsState with copyable email/password fields
- Auto-login via JWT token with checkAdminStatus
- /auto-login route with ErrorBoundary and no-referrer meta
- Narrowed contact_type to 'email' | 'telegram' | null
- Disabled button styling for PendingActivation go-to-cabinet
- i18n: added landing.copy key to all 4 locales

src/App.tsx

@@ -40,6 +40,7 @@ const Connection = lazy(() => import('./pages/Connection'));
 const ConnectionQR = lazy(() => import('./pages/ConnectionQR'));
 const QuickPurchase = lazy(() => import('./pages/QuickPurchase'));
 const PurchaseSuccess = lazy(() => import('./pages/PurchaseSuccess'));
+const AutoLogin = lazy(() => import('./pages/AutoLogin'));
 const TopUpMethodSelect = lazy(() => import('./pages/TopUpMethodSelect'));
 const TopUpAmount = lazy(() => import('./pages/TopUpAmount'));
 const ConnectedAccounts = lazy(() => import('./pages/ConnectedAccounts'));
@@ -219,6 +220,16 @@ function App() {
             </ErrorBoundary>
           }
         />
+        <Route
+          path="/auto-login"
+          element={
+            <ErrorBoundary level="app">
+              <LazyPage>
+                <AutoLogin />
+              </LazyPage>
+            </ErrorBoundary>
+          }
+        />
 
         {/* Protected routes */}
         <Route