Improvements to the AI Chat Interface

Remove the header and consolidate logos and other elements in the sidebar. Eliminate breadcrumbs (the disadvantages outweigh the benefits, as there isn't a deep page hierarchy). Remove the "Here you can chat with the AI. Ask your questions or just have fun." message (greeting messages can be displayed within the chat, making this unnecessary). Remove or relocate the "544 / 50,000 Words Used" text count, possibly near the search box. Fix the input box at the bottom of the page, like in ChatGPT (this has a significant advantage in that users can easily refer back to chat history while typing messages).