Three-preset time window selector for analytics pages.

Renders a <nav> with three <.link patch> preset buttons ("7 days UTC", "30 days UTC", "90 days UTC") that update the ?window= URL param via LiveView client-side navigation. handle_params/3 fires automatically — no handle_event callback is needed in the parent LiveView.

Note on base_path

base_path may be a clean path or a path with existing query params. The component uses URI to safely replace the ?window= param, so any existing query string is correctly overwritten rather than producing a double-? URL.