The dev server died on start. The real problem sat in a missing local database string. The runtime would not boot without it. Same shape appeared after the hosted services were replaced with local containers. Build time still reached for the database connection. The string needed to be set or the build failed outright. The patches for cookie handling worked. Domain routing needed its own fix. The database layer exposed the same gap once analytics and billing were stubbed. The client initialization still demanded the connection before anything else ran