Fixing SEO for a React SPA Marketplace on Firebase Hosting

I recently ran into an SEO problem while building a marketplace for Ionic templates and UI kits. The stack looked reasonable at first: React 18 React Router 7 Vite Firebase Hosting Firestore react-snap for prerendering The site worked perfectly for users but Google hated it and none of the pages were indexing. After digging into Search Console, page source output, and prerender behaviour, I discovered several compounding problems that are easy to miss when building modern SPA marketplaces. This