Add nicer reporting with live-updating web dashboard

[ichoosetoaccept]

Goal

Provide a better user experience for monitoring by adding a live-updating web dashboard alongside the existing terminal output.

Proposal

Create an optional HTTP server that serves an HTML dashboard showing real-time system metrics with auto-refresh capabilities.

Implementation Ideas

• Add a --web or --dashboard flag to launch the web interface
• Serve on localhost with a configurable port (e.g., http://localhost:8080)
• Use WebSockets or Server-Sent Events for live updates
• Display metrics in a clean, responsive HTML interface
• Keep terminal output as the default for simplicity

Technology Options

• Python built-in: Use http.server or socketserver with minimal dependencies
• Flask/FastAPI: Lightweight web frameworks (adds dependencies)
• Caddy: While Caddy is a great web server, it doesn't have a Python package - it's a standalone Go binary that would need to be bundled/installed separately

Features

• Real-time CPU, memory, and process metrics
• Historical graphs/charts
• Process list with sorting/filtering
• Auto-refresh with configurable intervals
• Mobile-friendly responsive design

Considerations

• Should remain an optional feature (don't force web server dependency)
• Keep the package lightweight
• Terminal output should remain the primary interface