chore(ci): remove unnecessary Playwright install

[chenjiahan]

This PR removes an unused Playwright browser installation step from CI because the workflow does not run browser-based tests. This avoids downloading browser binaries during every CI run.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: e3184b54-3d69-4a2b-8384-9402f6cb9490

📥 Commits

Reviewing files that changed from the base of the PR and between cbce7a1 and 79c0c9e.

📒 Files selected for processing (1)

• .github/workflows/test.yml

💤 Files with no reviewable changes (1)

• .github/workflows/test.yml

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📝 Walkthrough

Walkthrough

Removed the Playwright Chromium installation step from the GitHub Actions test workflow, causing the Lint step to follow Pnpm setup directly.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: removing an unnecessary Playwright install step from CI.
Description check	✅ Passed	The description accurately explains the CI change and why the Playwright install step was removed.
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
• Commit unit tests in branch chore/optimize-playwright-install

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