test(reporter): give each spawned flake-lab run its own output dir

[PhenX]

What & why

CI's "Lint, typecheck and unit tests" job has been failing on main since the flake-lab work landed (run 36513556098, and on #689). The failures are in packages/reporter/tests/flake-run.spec.ts:

• the target line reports matchesHistory: false instead of true;
• or the companion test fails with browserContext.close: ENOENT … packages/reporter/test-results/.playwright-artifacts-N/traces/….network.

Root cause: flake-run.spec.ts and flake-cli-run.spec.ts each spawn a real Playwright run from a temp project inside packages/reporter/tests/. Neither config sets outputDir, so Playwright resolves it from the nearest package.json. Both runs therefore write to the shared packages/reporter/test-results/, and each run clears that folder when it starts. vitest runs the two files concurrently. When one run starts while the other is closing a browser context, the second run's trace write fails with ENOENT. That error either replaces the target's expected error signature (so matchesHistory is false) or fails the companion.

Fix: set outputDir: './test-results' in both spawned configs, so each run writes inside its own temp project. That folder is removed with the project in afterAll. No assertion is changed and nothing is skipped or retried.

How was it tested?

• Reproduced on main: npm run reporter:test:coverage (the CI command) failed 1 of 2 runs with the same matchesHistory assertion as CI.
• With the fix: the same command passed 4 of 4 runs.
• reporter:typecheck, reporter:lint, reporter:format:check and commitlint are clean.

Checklist

• PR title follows Conventional Commits (type(scope): subject)
• Tests added/updated for behavior changes (test-harness fix only)
• Docs updated if user-facing (not user-facing)

🤖 Generated with Claude Code

https://claude.ai/code/session_01Tx72FSSvzNpoz6RUcBEkrx

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Generated by Claude Code

[github-actions]

Coverage Report for Reporter (./packages/reporter)

Status	Category	Percentage	Covered / Total
🔵	Lines	76.47%	3911 / 5114
🔵	Statements	74.91%	4480 / 5980
🔵	Functions	79.66%	752 / 944
🔵	Branches	68.9%	3215 / 4666

File Coverage

No changed files found.

Generated in workflow #2264 for commit a01ef1b by the Vitest Coverage Report Action

[github-actions]

Coverage Report for Application (./apps/application)

Status	Category	Percentage	Covered / Total
🔵	Lines	63.14%	17961 / 28444
🔵	Statements	61.5%	20974 / 34102
🔵	Functions	63.35%	4053 / 6397
🔵	Branches	53.77%	15682 / 29163

File Coverage

No changed files found.

Generated in workflow #2264 for commit a01ef1b by the Vitest Coverage Report Action