Fix `null` signUp URL in various places (#25190)

Handle Surrogate Pairs in truncate() (#25148)

Rewrite actions/modal and reducers/modal with typescript (#24833)

Fix export style of `<LoadGap />` based on `<Domain />` (#25128)

Update inconsistent `defaultMessage` (#25114)

Change share action from being in action bar to being in dropdown in web UI (#25105)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

Fix `null` signUp URL handling from #25014 (#25108)

Rewrite `<LoadGap />` as FC and TS (#25042)

Enforce import order with ESLint (#25096)

Add support for custom sign-up URLs (#25014)

Fix video player offering to expand in a lightbox when it's in an iframe (#25067)

Use JSX syntax for Fragments (#25093)

Use the new JSX transform (#25064)

Rewrite `<TimelineHint />` as FC and TS (#25091)

Rewrite `<Skeleton/>` as FC and TS (#25055)

Allow scripts in post embed previews (#25071)

Upgrade to React 18 (#24916)

Remove duplicate  JPG type (#25054)

Fix minor typos in comments and spec names (#21831)

Add hCaptcha support (#25019)