Verifies:
- Title lives in the top 25% of the screen (guards against letterboxing regressions)
- Plus button opens Add Connection sheet; Cancel dismisses
- Settings gear opens Settings sheet; Done dismisses
- Search field accepts input and keeps the top chrome visible
- Empty-state CTA routes to Add Connection
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>