prudhvi128/AI-Placement-Mentor ? reverse-engineered prompt

Build me a simple AI placement mentor web app that helps students prepare for jobs in one place.

I want a clean Streamlit app where a user can chat with an AI mentor, upload a resume and get feedback, see an ATS style score, do mock interview practice, and get career recommendations based on their profile. It should remember past conversations and user details so the advice feels personal over time. If the app needs to choose between different AI models or tools for different tasks, make that happen automatically in the background so the user just gets the best response.

Please make the interface easy to use, polished, and student friendly. Include a basic way to sign in or manage users if needed, and save the important data so it persists. If anything depends on current docs or best practices, look them up online and use the latest approach.