- Deleted apps/web/src/utils/optimisticStoreUpdates.ts (unused file)
- File was unused - no imports found in codebase
- Mutations already use React Query's onMutate pattern
- No TypeScript errors after deletion
- Actions 4.4.1.2 and 4.4.1.3 complete
- Created comprehensive test suite for response format
- Test Success() returns wrapped format {success: true, data: {...}}
- Test Created() returns wrapped format
- Test Error() returns wrapped format for all status codes
- Test RespondWithAppError() returns wrapped format
- Test ValidationError() returns wrapped format with details
- Test all helper functions use wrapped format consistently
- All 7 test functions pass successfully (13+ test cases)
- Tests verify all response helpers return wrapped format
- Action 1.3.2.5 complete - backend response format verified
