Clear custom prompt

DELETE /v1/profile/prompt — Drop the addendum. UI surfaces a hard-confirm before calling.

DELETE `/v1/profile/prompt`

Drop the addendum. UI surfaces a hard-confirm before calling.


Method	`DELETE`
Path	`/v1/profile/prompt`
Auth	`Authorization: Bearer <token>` required when `GATEWAY_AUTH_TOKEN` is set
Category	personalization

{ "ok": true, "data": { "custom_prompt": null } }