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Sign in only when you want shortlist and profile behavior.
Public browsing stays open. Authentication only steps in when the product needs to remember you across save, profile, and recommendation flows.
Start a session
CARD-06 keeps this lean: email plus an optional name is enough to establish a session and unlock protected routes.
Why sign in now?
This foundation is intentionally narrow so the product stays focused on the MVP loop.
Protected routes can now distinguish public browsing from saved and profile flows.
The API can return the current user through a stable `/v1/auth/me` contract.
Save, profile, and recommendation cards can build on the same session transport next.