Create a modern analytics dashboard with Next.js and Tailwind CSS. The dashboard should have tabs for different sections including:

1. User Stats - showing total users, active users, new sign-ups, and user retention metrics with a bar chart for user growth over time
2. App Performance - displaying server response time and client-side performance metrics with line charts, plus error rate statistics
3. Insights - featuring key metrics like most active features, user engagement time, conversion rates, and a summary of important observations
4. User Feedback - showing user satisfaction scores and recent feedback with user avatars and star ratings


Use shadcn/ui components for the UI elements and Recharts for data visualization. Make it responsive and include sample data to demonstrate the functionality