- Replaced Gemini-style glass/blue aesthetic with clean Material You pink theme
- ChatGPT-style message layout: user right-aligned, coach left-aligned with avatars
- User avatar shows initials, coach avatar shows brain icon
- Chat bubble design: rounded cards matching app theme (no glass/blur effects)
- Clean textarea input with Enter to send, Shift+Enter for newlines
- ChatGPT-style empty state with suggestion chips
- Typing indicator with bouncing dots animation
- Sidebar uses Material You surface/container colors
- Status bar shows model name and ready/thinking state
- Error messages styled as Material You error containers
- Bottom hint text: 'coach can make mistakes'
- All colors use CSS custom properties for accent theme consistency
Ned