ci: use default E2E workers and GitHub reporter

[Suree33]

Summary

• Set Playwright workers to undefined at all times so the runner uses Playwright's default worker count
• Add Playwright's built-in github reporter on GitHub Actions while keeping existing list and html reporters
• Update the E2E docs to describe default worker behavior and GitHub Actions annotations

Test Plan

• pnpm run format:check
• pnpm run lint
• CI=1 GITHUB_ACTIONS=true pnpm run test:e2e (Running 162 tests using 2 workers, 146 passed / 16 skipped; GitHub reporter emitted a Playwright Run Summary notice)

[coderabbitai]

📝 Walkthrough

Walkthrough

The Playwright workers config was changed from process.env.CI ? 1 : undefined to always undefined, removing the single-worker restriction in CI. Two lines in docs/e2e-testing.md were updated to document the resulting fullyParallel: true / workers: undefined behavior.

Changes

Playwright worker config and docs

Layer / File(s)	Summary
Remove CI worker limit and update docs playwright.config.ts, docs/e2e-testing.md	workers is now always undefined instead of 1 in CI; docs updated in the config key-points section and the GitHub Actions step description to reflect fullyParallel: true with default worker count.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐇 No more single-worker blues,
The tests run free as morning dew,
undefined the workers say,
Playwright picks its own sweet way,
Parallel hops throughout the day!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the main change of using Playwright's default E2E workers, though "GitHub reporter" is not reflected in the summary.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/e2e-parallel-workers

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	blog	16e43d4	Commit Preview URL Branch Preview URL	Jun 28 2026, 04:40 PM