next.js

db5c9b68 - [test] Activity has types and supports react-server (#78196)

[test] Activity has types and supports react-server (#78196) Backport of https://github.com/vercel/next.js/pull/78066 to 15.3.x --------- Co-authored-by: Sebastian "Sebbie" Silbermann <sebastian.silbermann@vercel.com>