Inverse coverage for the auth path: TS-01..TS-06 all wipe the customer row (drop_customer=true) so every OTP path lands on the new-user set-name branch. TS-07 instead seeds an existing identified customer (phone + display_name + is_anonymous=false) and verifies the OTP sign-in returns the existing row unchanged via resolveCustomerForIdentity branch 1, so /auth/set-name is never shown. Adds: * /internal/_test/seed-customer endpoint — upserts a customer with phone + display_name + is_anonymous=false. * client_app/.maestro/scripts/seed_customer.js helper. * client_app/.maestro/flows/ts-07_returning_existing_name_skips_setname.yaml. * TS-07 scenario doc + coverage-map row in requirement/phase4-customer-flow.md. The flow asserts the "halo, <name>" greeting on the returning-user home variant (identified users always land on _SHomeReturningView regardless of chat history) plus an explicit notVisible on "Siapa namamu" as a belt-and-braces check. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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