I've created Winston, a comprehensive personal virtual assistant mobile app with Vietnamese language support. Here are the key features:

Home Screen

• Clean, modern design with gradient background
• Current time and date display
• Quick action grid for common tasks (Calendar, Weather, Maps, etc.)
• Easy access to chat functionality

Chat Interface

• Real-time messaging with Winston
• Voice input button (UI ready for speech recognition)
• Responsive message bubbles
• Timestamp for each message
• Smooth scrolling message history

️ Settings Page

• User profile section
• Comprehensive settings options
• Clean navigation between screens

Mobile-First Design

• Optimized for touch interactions
• Responsive layout that works on all mobile devices
• Proper spacing and touch targets
• Smooth transitions between views
• Vietnamese language support throughout

Design Features

• Modern UI with shadcn/ui components
• Consistent color scheme (blue primary)
• Intuitive navigation
• Clean typography and spacing
• Professional avatar and icon system

The app is fully functional with state management for navigation, messaging, and user interactions. You can expand it further by integrating real AI services, voice recognition, and the various quick action functionalities.