Todo List UI Improvements

What: Dedicated todo rendering component with expanded view capability How to use:

# Todo lists now have enhanced visual presentation
# Use Ctrl+T to toggle expanded todo view (when available)
claude
/todos "Implement feature X" "Test feature Y"

Details:

• New dedicated Pb1 component for consistent todo list rendering
• Enhanced checkbox visualization with proper status indicators
• Expandable todo view for better task management
• Improved integration across different UI contexts
• Evidence: Pb1() at line 399903, expanded todos feature at line 400288