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.