nkoushik30/placement_management_system ? reverse-engineered prompt

Build me a simple Salesforce placement management system in this project.

I want something I can open in Lightning Experience and use to track students, companies, job postings, interviews, and placements. Please set up the basic custom objects and fields that make sense for this workflow, along with the main business logic and a clean Lightning UI so people can add and view records easily. Include the usual Salesforce pieces like Apex where needed, validation, and a few helpful tests so it all deploys cleanly.

If you think a small dashboard or home page would make the app easier to use, add that too. Keep it practical and not overly complicated, this is for a real working demo that can grow later. Use the existing Salesforce DX project structure, and look up current Salesforce docs online if you need to confirm the best approach.