[WIP] Activity middleware vNext

[compulim]

Fixes #

Changelog Entry

Description

Design

Activity middleware signature

Today, the signature is pretty complex as it need to accommodate activity grouping.

As we modernized activity grouping in #5471, we can minimize props passed to activity middleware related to grouping.

type Request = {
  activity: WebChatActivity;
};

type Props = EmptyObject;

Specific Changes

-

• I have added tests and executed them locally
• I have updated CHANGELOG.md
• I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)