test(08): persist human verification items as UAT

.planning/phases/08-engagement-user-profile-new/08-HUMAN-UAT.md

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+---
+status: partial
+phase: 08-engagement-user-profile-new
+source: [08-VERIFICATION.md]
+started: 2026-05-08T13:47:12Z
+updated: 2026-05-08T13:47:12Z
+---
+
+## Current Test
+
+[awaiting human testing]
+
+## Tests
+
+### 1. Scroll restoration on back gesture (SC#2)
+expected: List scrolls back to prior row position when navigating back from `/mobile/engagement/[userId]`
+result: [pending]
+notes: User-tested during execution and accepted as a known limitation — sessionStorage shim with rAF retry was added but does not consistently restore window scroll on this layout. List scrolls back to top instead of prior position. No regression to other engagement features.
+
+## Summary
+
+total: 1
+passed: 0
+issues: 0
+pending: 1
+skipped: 0
+blocked: 0
+
+## Gaps