Analytics: Add User Analytics Dashboard

## Description
Create an analytics dashboard to track usage, performance metrics, and user engagement.

## Tasks
- Set up analytics tracking
- Create analytics dashboard component
- Track key user actions
- Visualize usage patterns
- Add privacy-respecting analytics

## Acceptance Criteria
- Analytics dashboard displays key metrics
- User actions are tracked
- Privacy-respecting implementation
- Performance metrics visible

## Tech Stack
- React/Next.js
- Analytics library (Plausible/PostHog)
- Chart libraries

## Getting Started
1. Choose analytics solution
2. Set up tracking
3. Create dashboard component
4. Add privacy controls

## Labels
`good first issue` `frontend` `enhancement`

## Estimated Effort
**Medium** - 3-4 days