Portefeuille uses the existing safe-area-aware Screen sticky header slot for its AccountBar. Only wallet content scrolls; back, profile and paywall callbacks remain unchanged, including the lack of a back action at a tab root.

Observed test failure: the stickyHeader prop was undefined before the change. Both component regression tests pass after moving the existing header. A Maestro scroll-and-back flow is supplied and its YAML parses; native execution is unavailable because the Maestro CLI is not installed. No device validation is claimed. No dependencies, native configuration, collection data or server changes are involved. Unrelated changes in the main checkout were preserved.

Lint with zero warnings, typecheck and full Jest passed: 295 suites / 2,856 tests, with 11 existing skipped tests. Pre-push gates also passed.

• Issue #806
• Mobile PR #807, targeting staging.