Scale inputs are temporary
The workbench starts with its default dimension after reloading. Your choice of scale is not written to localStorage or a reader account. Qandorevi uses no marketing cookies, visitor analytics or third-party tracking. The accompanying images and code are local resources.
The session behind a message
For contact submissions, PHP issues a random token tied to a first-party session cookie. Page JavaScript cannot read this HttpOnly cookie. It lasts for that browser session and helps prevent another origin from sending a request in your name. Rejecting the cookie can make message validation fail without affecting the model exercises.
Separate browser and server controls
Site-data settings clear the browser session. Previously received correspondence lives elsewhere: the protected inbox on the website server. To request deletion there, provide the receipt through Contact. The Privacy page describes what the inbox contains; no persistent model draft is maintained by the workbench.