Finalize Claude Web App Backend

I’ve built a web app with Claude and the interface is complete. What’s left is the server-side polish: wiring up the remaining API endpoints and adding a secure user-authentication layer. All data is held in an in-memory database, so the hooks you create need to read from and write to that store seamlessly.

You’ll get full access to the current Claude-generated backend stubs, the finished front-end, and a staging environment on my existing site. Your task is to complete the missing API development work, implement robust login/session management, and push the code to the production branch so I can launch.

Deliverables
• Fully functional API endpoints connected to the front-end
• Secure sign-up, login, token refresh, and logout flows
• Clean integration with my in-memory datastore
• Basic unit tests plus a short deployment guide

Acceptance criteria
• All front-end calls return expected data with no console or network errors
• Authentication passes standard OWASP checks
• End-to-end test script runs green in staging

The project is focused and ready to go; if you’re comfortable working with Claude and fast in-memory stores, let’s get this shipped.