StanleyCarvalho/Dossie-concurso-esfecex ? reverse-engineered prompt

Build me a web app for preparing for the EsFCEx Informática exam, focused on the VUNESP style of questions.

I want a dashboard that shows the history of past exams, the main subjects that appear most often, and a study plan that prioritizes what matters most. It should also have a question bank and a simulator that uses the same subject mix as the real exam.

Please add a way to upload official exam PDFs and use AI to read the file, extract the questions, sort them by subject and topic, and save the answers when they are available. If possible, also let the app generate short explanations for questions and extra practice questions.

Make it work with a PostgreSQL database and environment variables for the database connection and session secret. Use Google Gemini for the AI features, and if the key is missing, the app should still work for the parts that do not depend on AI and show a clear message for the rest. Please make it feel polished and easy to use.