Plan cancellation dialog with multi-select reason checkboxes, feedback textarea, and warning banner

reui/dialog-3

Subscription offboarding dialog: warning Alert with dismiss and manage actions, a checkbox grid of reasons, a feedback Textarea, and a Cancel plan button gated until a reason is picked. ReUI Alert, shadcn Dialog, Checkbox, Tooltip. Churn flows.

Paid component: its registry needs a licence from the library, so install it from their site.