* feat(presentation): support hosted widget actions
* refactor(discord): route widget launches through presentation
* chore: keep changelog release-owned
* test(interactive): type the invalid web-app boundary case explicitly
* test: type web-app action fixtures against the split union
The two-member web-app union no longer accepts a distributed
type: "url" | "web-app" literal or an empty receipt in typed
callbacks; use explicit action casts and the Discord receipt factory.
990e8d24b0
