test: gate tab item geometry to iOS 27

[rdlabo]

Summary

• keep whole-tab-bar geometry checks on every supported OS
• assert per-item lens geometry only on iOS 27+, where UITabBar mirrors the DOM lens layout
• leave iOS 26's native equal-width item division as an OS-specific behavior

This intentionally drops the previous suite-wide retry flags, search remount workaround, toolbar-route change superseded by #182, and unrelated generated HTML formatting.

Verification

• npm run lint
• iOS 26.5: testTabPositionsWebComparison passed in light and dark appearance without test retries

The current main search fixture failure occurs before the proposed search helper would run and is tracked separately.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[github-actions]

Playwright test results

 336 passed

Details

 336 tests across 18 suites
 4 minutes, 24 seconds
 1c6a78f
 This detailed result covers Ionic 9 only. Ionic 8 runs against the same screenshots in a separate matrix job; check the workflow run for both results. To update the screenshots, comment with /update-screenshots.

[github-actions]

📊 Ionic 9 Playwright Test Report

View the detailed Ionic 9 report: https://rdlabo-dev.github.io/ionic-theme-ios27/pr-183/

Ionic 8 runs against the same screenshots in a separate matrix job. View both results in the workflow run.

[rdlabo]

The OS-specific tab geometry gate and the search-field reacquisition helpers are reasonable, but I don’t think this should merge with suite-wide retries.

-test-iterations 3 -retry-tests-on-failure applies to every test in both verification scripts, not only to the known search remount race. It can hide deterministic regressions that happen once or twice, can roughly triple suite time, and makes a green run insufficient evidence that the first execution passed. The PR description also confirms that a product-side collapse-on-focus race remains.

Please remove the global retry flags. After #182 lands, also drop the overlapping toolbar-route change and the unrelated generated HTML formatting. Keep the focused search stabilization and the iOS-version-specific item geometry assertion, and track the remaining product race separately rather than treating retries as its resolution.

[github-actions]

npm beta published

CI passed for the merge commit edc618dbeda8. Install the immutable version with:

npm install @rdlabo/ionic-theme-ios27@1.0.4-beta.pr183.shaedc618dbeda8