AarjanAdhikari/Mergy ? reverse-engineered prompt

Build me a web app called Mergy that helps developers understand a GitHub repository at a glance. I want a clean dashboard where I can connect a repo and see useful insights like repo health, pull request intelligence, activity trends, and simple predictions about risky changes or areas that might need attention. It should feel modern, responsive, and work well in both light and dark mode.

Use a polished interface with charts and cards that make the data easy to scan, and make sure it pulls real information from GitHub so the insights feel practical, not just decorative. If it helps, you can use current docs online while building it. I also want a basic backend for the GitHub data and analytics logic, plus a simple machine learning powered section that surfaces predictions in a way a normal developer can understand. Keep the app straightforward to use, focused on repository analysis, and ready to deploy cleanly.