The login page immediately restarted OAuth after logout, and OAuth silently reused a remembered PDS device account. Wait for an explicit Sign in click and request fresh credentials only on the account-manager path. First-time visitors now also see the Sign in button. Preserve migration and delegated login continuations.\n\nVerify 241 frontend tests, Svelte checks, the production frontend build, and local browser fixture flows. Reviewed by Claude Opus 5.5.\n\nCo-Authored-By: Codex <noreply@openai.com>