Refactors client-side navigation to use `wouter`'s `setLocation` instead of `window.location.href` for smoother transitions and improves the logout process by making it an asynchronous POST request with proper error handling and state invalidation. Also adds an "Auctions" button to the main navigation bar on multiple pages.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 069d4324-6c40-4355-955e-c714a50de1ea
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/3df548ff-50ae-432f-9be4-25d34eccc983/069d4324-6c40-4355-955e-c714a50de1ea/bLfICpO
