- Detect on mount if user already has Trainer/Employee/Guardian records
- Show green notice when record exists, amber warning when role implies
  record but none exists (orphan state)
- Allow entity creation on save even without role change when entities
  are missing (repair orphaned users from before the redesign)
- Disable create toggles when record already exists to prevent duplicates
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>