<!-- Add the related story/sub-task/bug number, like Resolves#123, or
remove if NA -->
**Related issue:** Resolves#44958
# Details
Fixes two issues on the checkerboard:
1. Ensures that the chart shows data going back 30 calendar days (not
720 hours) if it has it
2. Leaves `0` values out of the chart color band calculations in
"relative" color mode
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [ ] 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.
n/a, unreleased
## Testing
- [X] Added/updated automated tests
- [X] QA'd all new/changed functionality manually
**Before**
Colors clustered in top 3 levels, empty boxes in first column:
<img width="705" height="416" alt="image"
src="https://github.com/user-attachments/assets/b867a1a9-4c52-4b96-92fd-04e7848c6295"
/>
**After**
Colors spread over all levels, no empty boxes in first column:
<img width="707" height="412" alt="image"
src="https://github.com/user-attachments/assets/c67e11c5-6dd8-4e66-9c32-9d9213ccb24f"
/>
For unreleased bug fixes in a release candidate, one of:
- [X] Confirmed that the fix is not expected to adversely impact load
test results
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Charts request an extra day to ensure full calendar-day coverage
across timezones.
* Checkerboard visualization excludes empty/no-data slots from relative
color scaling so color ramps reflect non-zero data.
* Calendar view trims leading partial days so the displayed window
matches the selected range.
* **New Features**
* Chart date-range selection expanded to support any value from 1–31
days.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Scott Gress
64a50d0c16