auto-claude: subtask-7-1 - Create functionality tests for navigation, forms, and language switching

- Add comprehensive E2E functionality tests (33 tests):
  - Navigation: page loading, desktop/mobile nav links, active states
  - Contact Form: validation, submission, error handling
  - Language Switching: locale changes, URL preservation, dropdown behavior
  - Cross-functional: combined navigation and language flows
  - Accessibility: ARIA attributes for nav, menu, form labels

- Fix Next.js 15 ssr:false in server component issue:
  - Create ChatbotLoader client wrapper for dynamic import
  - Update layout.tsx to use ChatbotLoader instead of direct dynamic import

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/chat/index.ts

@@ -3,5 +3,6 @@
  */
 
 export { Chatbot } from './Chatbot';
+export { ChatbotLoader } from './ChatbotLoader';
 export { ChatMessage, TypingIndicator, WelcomeMessage } from './ChatMessage';
 export type { ChatMessageData, ChatRole } from './ChatMessage';