feat(chat): Integrate chatbot API for dynamic responses

This commit replaces the static, simulated chat functionality with a live integration to a chatbot backend API.

The chat page now sends user messages to a webhook endpoint using the `fetch` API. It implements session management by generating and storing a `sessionId` in `localStorage` to maintain conversation context between requests.

Key changes:
- Implement `async` `sendMessage` function to post to the chatbot API.
- Add session ID generation and persistence.
- Dynamically render text and image responses from the API.
- Remove hardcoded example messages from the HTML.
- Update the virtual assistant's name to "Maya".
- Fix navigation links from the dashboard to the chat page.

dashboard-page/scripts/main.js

@@ -4,13 +4,13 @@ const dropdownMenu = document.querySelector('.dropdown-menu');
 
 if (menuButton && dropdownMenu) {
     menuButton.addEventListener('click', function() {
-        dropdownMenu.classList.toggle('visible');
+        dropdownMenu.classList.toggle('hidden');
     });
 }
 
 // Close dropdown when clicking outside
 document.addEventListener('click', function(event) {
     if (!event.target.closest('.mobile-header-right') && dropdownMenu) {
-        dropdownMenu.classList.remove('visible');
+        dropdownMenu.classList.add('hidden');
     }
 });