soemoehtun/RF-Tools ? reverse-engineered prompt

Build me a browser based RF planning app for cellular engineers that works completely locally, with no backend and no file uploads to a server.

I want to be able to import sector data from CSV, TXT, or XLSX, then see the network on an interactive map with site dots, sector shapes, labels, and color options. It should include tools for PCI and RSI planning, tilt optimization, azimuth optimization, coverage prediction with heatmaps, and interference analysis. Please make the planning results easy to review and export as CSV or PNG where that makes sense.

Use a simple modern interface with a built in demo network so I can try everything right away. The app should support common radio fields like site IDs, coordinates, azimuth, bandwidth, PCI, RSI, tilt, height, and antenna values, and it should handle missing optional values sensibly. If you need current library docs, look them up online.