Audited all varchar-limited columns vs code that generates values for them:

- BranchForm: validation was max:20 but column is varchar(10) — fixed
- ActivityService: Str::slug output now capped at 90 chars (column is 100)
- TrainingProgramService: same slug truncation fix
- SetupWizard: slug generation for activities/programs also truncated
- Logout: removed navigate:true (app→guest layout cross breaks)

Affected columns and their limits:
  branches.code = varchar(10) ✓ fixed
  training_groups.code = varchar(10) ✓ already validated
  activities.slug = varchar(100) ✓ now truncated
  training_programs.slug = varchar(100) ✓ now truncated
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>