upgrade to tamagui v2 and guest pwa overhaul

resources/js/guest-v2/__tests__/NotFoundScreen.test.tsx

@@ -0,0 +1,28 @@
+import React from 'react';
+import { describe, expect, it, vi } from 'vitest';
+import { render, screen } from '@testing-library/react';
+
+vi.mock('@tamagui/stacks', () => ({
+  YStack: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
+}));
+
+vi.mock('@tamagui/text', () => ({
+  SizableText: ({ children }: { children: React.ReactNode }) => <span>{children}</span>,
+}));
+
+vi.mock('@/guest/i18n/useTranslation', () => ({
+  useTranslation: () => ({
+    t: (_key: string, fallback?: string) => fallback ?? _key,
+  }),
+}));
+
+import NotFoundScreen from '../screens/NotFoundScreen';
+
+describe('NotFoundScreen', () => {
+  it('renders fallback copy', () => {
+    render(<NotFoundScreen />);
+
+    expect(screen.getByText('Seite nicht gefunden')).toBeInTheDocument();
+    expect(screen.getByText('Die Seite konnte nicht gefunden werden.')).toBeInTheDocument();
+  });
+});