i18n: Fix 19 more hardcoded English strings in admin pages and components
Fixed:
- compliance-overview: Compliance Monitoring Dashboard, Onboarding Status, Data Retention Policies, Active Policies, Consultation Log
- exam-proctoring: Exam Proctoring, Active Sessions, Total Sessions
- signage: Emergency Signage, Normal option
- compliance-wizard: Data Retention Periods, Consultation Checklist, Compliance Setup Complete
- dashboard-customizer: Add Widget
- data-import-export: Data Management Best Practices, Export data regularly
- district-management: Access Denied
- exam-session-monitor: Exam Mode Active
- professional-calendar: Fixed 'Create Neues Ereignis' typo
- sidebar: Toggle Sidebar
All admin pages and shared components now fully German.
Z User
91d6980c21