<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#46119
New activities visible on host details page:
<img width="482" height="424" alt="image"
src="https://github.com/user-attachments/assets/8b8b33b2-c135-4061-b258-473fcc109d89"
/>
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.
## Testing
- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* MDM unenrollment events now appear on the host activity timeline in
host details.
* **New Features**
* Host activity entries for MDM unenroll show platform- and actor-aware
messaging and appropriate action/icon visibility.
* **Tests**
* Added tests to verify rendering and messaging for various platforms
and actor presence.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Victor Lyuboslavsky
56fe9ed6e1