[rdlabo]

Correct three points in the Native UI adoption guides:

• Keep the default controls when adding a rail to existing native UI. verticalOnly is for limiting automatic projection to the rail.
• Document Foldable 8.3.3+ within version 8 for examples using BarPlacement.inset, including an upgrade command for existing installations.
• Explain that a bridge update failure stops native projection while the public handle remains web when Web fallback is active; use reason for diagnostics.

Documentation only. Related to #228.

Validation: 161 existing unit tests passed, Prettier and documentation generation passed, and engineering/marketing reviews completed with no remaining findings. The Foldable requirement was checked against the published 8.3.3 package's type definitions. No simulator validation was performed for this documentation change.

[github-actions]

Playwright test results

 454 passed

Details

 454 tests across 24 suites
 3 minutes, 52 seconds
 c130276
 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.