[Audit 2026-04-14] Build and CI blockers from static checks

[yanghao1143]

Summary

Static checks uncovered build/CI blockers and release pipeline hazards.

Findings

• High | confirmed redundant condition in DAL fails vet/build checks.
  • Evidence: pkg/dal/dal.go:88
• Medium-High | confirmed unreachable code reported by vet.
  • Evidence: sys/private/biz/menu_seed.go:37
• High | probable panic-based error handling in data initialization can amplify transient failures.
  • Evidence: user/private/data/data.go:40

Suggested Direction

• Fix vet blockers immediately to restore CI reliability.
• Replace panic-on-init in data layer with controlled error returns.