<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#45682
# Checklist for submitter
- [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
#### Before
<img width="1252" height="1027" alt="Screenshot 2026-06-29 at 10 33
15 AM"
src="https://github.com/user-attachments/assets/847ee011-7d2c-4cd2-9882-1508ed77bbd7"
/>
<img width="1248" height="1008" alt="Screenshot 2026-06-29 at 10 33
21 AM"
src="https://github.com/user-attachments/assets/859c2860-5fdb-43f2-8323-af8fc0665ff8"
/>
#### After
<img width="1198" height="819" alt="Screenshot 2026-06-29 at 10 29
25 AM"
src="https://github.com/user-attachments/assets/b96a134a-1271-40f5-99ca-802c7a1fbe10"
/>
<img width="1201" height="804" alt="Screenshot 2026-06-29 at 10 29
29 AM"
src="https://github.com/user-attachments/assets/37c4c262-95ce-4a77-8979-49944e7f2b75"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Content-hashed static assets under `/assets/` (e.g., hashed JS/CSS,
images, fonts) now use long-lived, immutable `Cache-Control` to improve
repeat page loads.
* **Bug Fixes**
* `Cache-Control` is now applied consistently for successful responses
and `304 Not Modified`.
* Non-hashed assets and non-success/error responses correctly avoid
caching via `Cache-Control: no-cache`.
* **Documentation**
* Added a release note explaining the new `Cache-Control` behavior for
hashed assets.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Nico
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