Now I'll update the background color to red by modifying the CSS variables in globals.css:

Done! I've changed the background color to red by updating the --background CSS variable from white (0 0% 100%) to red (0 100% 50%). The background will now display as a bright red across the entire application.

Now let me check the chatbot hook to understand how messages are handled:

Now I'll add attachment functionality. First, I'll update the types to support attachments:

Now I'll update the chatbot hook to handle attachments:

Now I'll update the main chat component to show the attachment UI:

I've successfully added attachment functionality to your chatbot. Here's what was implemented:

Changes made:

1. Updated Types - Added Attachment interface and extended Message to optionally include attachments with name, type, size, and URL properties
2. Enhanced Hook - Added attachment state management and handlers (handleAttachmentChange, removeAttachment) to manage file uploads
3. Updated UI - Added a file attachment button (paperclip icon) next to the send button, displays attached files with a remove option, and shows attachment information in message bubbles

Users can now click the paperclip icon to select multiple files, see previews of attached files before sending, and attachments will be displayed alongside messages in the chat.