Fix empty bar chart issue

[irfano]

This fixes an issue that is introduced with #20605.
Some cards were stuck in the loading state, and the date picker was disabled.

I added values with 0f to the chart data to fix the issue.

before	after

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To Test:

1. Log in.
2. Select a site with empty stats. (You can create a fresh one)
3. Open the DAYS tab from "My Site → Stats"

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Regression Notes

1. Potential unintended areas of impact

   • None

2. What I did to test those areas of impact (or what existing automated tests I relied on)

   • N/A

3. What automated tests I added (or what prevented me from doing so)

   • This reverts some part of previous PR.

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PR Submission Checklist:

• I have completed the Regression Notes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

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Testing Checklist (strike-out the not-applying and unnecessary ones):

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• Talkback.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• Large and small screen sizes. (Tablet and smaller phones)
• Multi-tasking: Split screen and Pop-up view. (Android 10 or higher)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr20674-a2e569d
	Commit	a2e569d
	Direct Download	wordpress-prototype-build-pr20674-a2e569d.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr20674-a2e569d
	Commit	a2e569d
	Direct Download	jetpack-prototype-build-pr20674-a2e569d.apk

Note: Google Login is not supported on these builds.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.27%. Comparing base (921ce21) to head (a2e569d).

Additional details and impacted files

@@             Coverage Diff             @@
##            trunk   #20674       +/-   ##
===========================================
- Coverage   82.58%   40.27%   -42.32%     
===========================================
  Files          15     1476     +1461     
  Lines         534    68115    +67581     
  Branches       50    11281    +11231     
===========================================
+ Hits          441    27431    +26990     
- Misses         75    38190    +38115     
- Partials       18     2494     +2476     

☔ View full report in Codecov by Sentry.
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[aditi-bhatia]

Good catch, thank you for fixing this 👍