The Auth Screen

One screen, two modes

Login and signup share every field except name (and the role picker). Two separate screens would be near-duplicates — so PawWalk ships one AuthView with a private Mode enum: .login or .signup. All the wording differences live as computed properties on the enum itself — the title, the button label, the "New here?" hint. Flip mode, and every string on screen flips with it.

The screen's state is a handful of @State fields — email, password, name, the chosen role, plus isSubmitting and validationMessage. And it reaches the shared AuthSession the way you learned in Module 5: @Environment(AuthSession.self).