### Background
A structured bug bash across all non-control variants on real devices before the experiment reaches traffic.
### Goal
All critical bugs found and fixed before full traffic ramp-up. All others documented.
### Requirements
- Bug bash covers all variants (A/B/C) on at minimum: Chrome Android (mid-range device), Safari iOS (current and one previous major version).
- Accessibility tested with VoiceOver (iOS) and TalkBack (Android).
- Edge cases to test: donor who taps badge repeatedly in rapid succession (animation queuing), slow network conditions.
### Acceptance Criteria for Done
[] Bug bash completed across all 3 variants on defined device/browsers abobe.
[] All critical and high bugs resolved and verified fixed.
[] Tested with VoiceOver and TalkBack; and possible issues filed.
[] Edge cases tested and outcomes documented.
[] Remaining known issues logged with severity and owner before closing.