**Click-to-expand functionality:**
- Truncated tool outputs are now clickable to show full content
- Works for bash (>5 lines), read (>10 lines), write (>10 lines)
- Displays "... (N more lines) - click to expand" hint in cyan
- Smooth toggle between preview and full output
- Cursor changes to pointer on hover
**System prompt and tools display:**
- Added system prompt section with yellow header on dark brownish background
- Shows all available tools with names and descriptions
- Both sections appear before messages for context
- Subtle yellow/brown theme (rgb(60, 55, 40)) that's not too bright
The HTML export now provides better interactivity for large outputs and gives full context about the agent's configuration.