techwithprateek/College-Capstone-Projects ? reverse-engineered prompt

Build me this collection of seven college capstone projects in one repo, with each project fully self contained so I can open any one folder and run it on its own.

I want two kinds of projects, some AI focused ones like a chatbot that answers from documents with citations, a conversational version that can handle follow up questions, and a meeting notes summariser, plus a few backend style ones like an idempotent payment flow, a URL shortener with analytics, and a job application tracker with login, queues, and roles.

Please make the apps actually work, include tests, and wire them up to real database style storage where that makes sense, not just fake demos. If any external API keys are needed for AI or email features, leave clear placeholders and explain what is missing. Keep the code clean and practical, and if you need current docs for any libraries, look them up online.