fix: restore broken star history chart

[OctoBored]

The star history chart is broken. The service we previously used stopped working because of GitHub stargazer API restrictions, so the chart fails to render in the README, README-zh, and on the website landing pages.

This PR points the chart to a working instance of the same service so the star history section displays correctly again for both English and Chinese readers.

Summary by CodeRabbit

• Documentation
  • Updated the Star History charts and links in the English and Chinese documentation.
  • Charts now use the updated Star History service address for improved availability.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ebe1ab0c-4ad3-4d1b-90ad-21439d55e49e

📥 Commits

Reviewing files that changed from the base of the PR and between b6e50e2 and 1535f0c.

📒 Files selected for processing (4)

• README-zh.md
• README.md
• src/en-US/index.smd
• src/zh-CN/index.smd

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📝 Walkthrough

Walkthrough

The Star History image and link URLs now use star-history.dera.page in both README files and both localized site pages.

Changes

Star History URL migration

Layer / File(s)	Summary
Update Star History links README.md, README-zh.md, src/en-US/index.smd, src/zh-CN/index.smd	The Star History image sources and destination links now use star-history.dera.page instead of the previous domains.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 1535f

This localized documentation change restores the star history chart across English and Chinese pages, with no actionable merge-blocking risk remaining after normal checks and review.

Suggested reviewers: jiacai2050, xihale

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: restoring the broken Star History chart.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[jiacai2050]

Please delete those star history code, we don't need them any more.

[jiacai2050]

@copilot Please delete those start history code