sharmashu/major-project-v1 ? reverse-engineered prompt

Build me a polished web app with a matching Chrome extension that work together smoothly.

I want users to be able to sign in, use the extension in their browser, and have the data saved and synced to the main site. The app should have a clean dashboard where people can see their info, manage their account, and handle whatever the extension is collecting or sending back. There should also be an admin area for checking records and testing the backend flow, plus basic webhook support so outside services can trigger updates. Use the existing database setup and make sure the whole thing feels simple, modern, and reliable. If anything is unclear, look up the current docs online and then implement the best version you can.