## Issue
- First batch of @iansltx 's work of cleaning up lint warnings #43387
## Description
- Quick PR review and grabbed as many confirmed low-risk quick wins as I
could `git checkout lint-cleanup <file/path/1> <file/path/2>`
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
## Release Notes
This release contains internal code improvements with one minor UI
tweak:
* **Style**
* Dropdown menu background color adjusted for clearer contrast in action
lists
* **Refactor**
* Improved type safety across the codebase with stricter TypeScript
annotations
* Removed unused imports and constants to reduce code clutter
* Enhanced React hook dependency arrays for more consistent component
behavior
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Rachel Perkins <rachel@Rachels-MacBook-Pro.local>
Co-authored-by: Ian Littman <iansltx@gmail.com>
> For #29197
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
<!-- Note that API documentation changes are now addressed by the
product design team. -->
- [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.
- [x] Manual QA for all new/changed functionality
> Related issue: #23942
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
<!-- Note that API documentation changes are now addressed by the
product design team. -->
- [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/Committing-Changes.md#changes-files)
for more information.
- [x] Manual QA for all new/changed functionality
relates to #22732
This adds the `counts` and `apps_updated_at` response data on the `GET
/fleet_maintained_apps` endpoint. We then add that to the UI to show the
counts and last time fleet maintained app data has been updated:
- [x] Added/updated tests
- [x] Manual QA for all new/changed functionality
