Unit tests (test_admin_service.py):
- Vendor creation without platforms
- Vendor creation with single platform
- Vendor creation with multiple platforms
- Vendor creation with invalid platform ID (ignored)
- Vendor creation with duplicate code/subdomain (fails)
- Vendor creation with invalid company ID (fails)
Integration tests (test_vendors.py):
- Create vendor via API without platforms
- Create vendor via API with platforms
- Create vendor with duplicate code fails (409)
- Non-admin cannot create vendors (403)
Auth tests (test_auth.py):
- Super admin login includes is_super_admin=true
- Platform admin login includes is_super_admin=false
- Get current super admin info includes is_super_admin
Total: 69 admin platform tests passing
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>