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.

src/app/admin/compliance-overview/page.tsx

@@ -56,7 +56,7 @@ export default function ComplianceDashboard() {
   return (
     <div className="space-y-8 p-8">
       <div>
-        <h1 className="text-3xl font-bold text-slate-900">Compliance Monitoring Dashboard</h1>
+        <h1 className="text-3xl font-bold text-slate-900">Compliance-Monitoring-Dashboard</h1>
         <p className="text-slate-600 mt-2">
           Track your school&apos;s data protection compliance status and document management
         </p>
@@ -73,7 +73,7 @@ export default function ComplianceDashboard() {
                 <AlertCircle className="w-8 h-8 text-yellow-600" />
               )}
               <div>
-                <p className="text-sm text-slate-600">Onboarding Status</p>
+                <p className="text-sm text-slate-600">Onboarding-Status</p>
                 <p className="font-semibold text-slate-900">
                   {data.status?.onboardingCompleted ? "Complete" : "Pending"}
                 </p>
@@ -87,7 +87,7 @@ export default function ComplianceDashboard() {
             <div className="flex items-center gap-3">
               <FileText className="w-8 h-8 text-blue-600" />
               <div>
-                <p className="text-sm text-slate-600">Data Retention Policies</p>
+                <p className="text-sm text-slate-600">Datenaufbewahrungsrichtlinien</p>
                 <p className="font-semibold text-slate-900">
                   {data.policiesConfigured} / {data.policiesReviewed} reviewed
                 </p>
@@ -124,7 +124,7 @@ export default function ComplianceDashboard() {
       {/* Data Retention Policies */}
       <Card>
         <CardHeader>
-          <CardTitle>Active Data Retention Policies</CardTitle>
+          <CardTitle>Aktive Datenaufbewahrungsrichtlinien</CardTitle>
           <CardDescription>
             Configured retention periods for each data category
           </CardDescription>
@@ -170,7 +170,7 @@ export default function ComplianceDashboard() {
       {data.consultations.length > 0 && (
         <Card>
           <CardHeader>
-            <CardTitle>Consultation Log</CardTitle>
+            <CardTitle>Beratungsprotokoll</CardTitle>
             <CardDescription>
               Staff and parent body consultations per module
             </CardDescription>

src/app/admin/exam-proctoring/page.tsx

@@ -111,7 +111,7 @@ export default function ExamProctoringPage() {
     <div className="space-y-6">
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="text-3xl font-bold text-gray-900">Exam Proctoring</h1>
+          <h1 className="text-3xl font-bold text-gray-900">Prüfungsüberwachung</h1>
           <p className="text-gray-600 mt-1">Monitor active exam sessions and suspicious activity</p>
         </div>
       </div>
@@ -121,7 +121,7 @@ export default function ExamProctoringPage() {
         <div className="bg-white rounded-lg border border-gray-200 p-4">
           <div className="flex items-center justify-between">
             <div>
-              <p className="text-gray-600 text-sm font-medium">Active Sessions</p>
+              <p className="text-gray-600 text-sm font-medium">Aktive Sitzungen</p>
               <p className="text-2xl font-bold text-gray-900 mt-1">{activeCount}</p>
             </div>
             <Clock className="w-8 h-8 text-blue-500" />
@@ -141,7 +141,7 @@ export default function ExamProctoringPage() {
         <div className="bg-white rounded-lg border border-gray-200 p-4">
           <div className="flex items-center justify-between">
             <div>
-              <p className="text-gray-600 text-sm font-medium">Total Sessions</p>
+              <p className="text-gray-600 text-sm font-medium">Sitzungen gesamt</p>
               <p className="text-2xl font-bold text-gray-900 mt-1">{sessions.length}</p>
             </div>
             <Eye className="w-8 h-8 text-purple-500" />

src/app/admin/signage/page.tsx

@@ -80,7 +80,7 @@ export default function SignageAdminPage() {
     <div className="space-y-6">
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="text-3xl font-bold text-gray-900">Emergency Signage</h1>
+          <h1 className="text-3xl font-bold text-gray-900">Notfall-Digital-Schild</h1>
           <p className="text-gray-600 mt-1">Manage displays, messages, and emergency alerts</p>
         </div>
         <Button onClick={() => setShowNewMessage(true)} size="lg" className="gap-2">

src/components/compliance-wizard.tsx

@@ -330,7 +330,7 @@ export function ComplianceWizard({ schoolId, onComplete }: ComplianceWizardProps
       {state.step === 2 && (
         <Card>
           <CardHeader>
-            <CardTitle>Data Retention Periods</CardTitle>
+            <CardTitle>Aufbewahrungsfristen</CardTitle>
             <CardDescription>
               Configure retention periods for each data category (state-specific defaults provided)
             </CardDescription>
@@ -358,7 +358,7 @@ export function ComplianceWizard({ schoolId, onComplete }: ComplianceWizardProps
       {state.step === 3 && (
         <Card>
           <CardHeader>
-            <CardTitle>Consultation Checklist</CardTitle>
+            <CardTitle>Beratungs-Checkliste</CardTitle>
             <CardDescription>
               Log consultations with staff and parent bodies per module
             </CardDescription>
@@ -502,7 +502,7 @@ export function ComplianceWizard({ schoolId, onComplete }: ComplianceWizardProps
       {state.step === 5 && (
         <Card>
           <CardHeader>
-            <CardTitle>Compliance Setup Complete</CardTitle>
+            <CardTitle>Compliance-Einrichtung abgeschlossen</CardTitle>
             <CardDescription>
               Review your configuration before finalizing
             </CardDescription>

src/components/dashboard-customizer.tsx

@@ -65,7 +65,7 @@ export function DashboardCustomizer({
       <Dialog open={showWidgetGallery} onOpenChange={setShowWidgetGallery}>
         <DialogContent>
           <DialogHeader>
-            <DialogTitle>Add Widget</DialogTitle>
+            <DialogTitle>Widget hinzufügen</DialogTitle>
           </DialogHeader>
           <div className="grid grid-cols-2 gap-4">
             {availableWidgets.map((type) => (

src/components/data-import-export-view.tsx

@@ -1465,13 +1465,13 @@ export default function DataImportExportView() {
                 <div className="flex items-start gap-3 p-4 rounded-xl bg-emerald-50 dark:bg-emerald-950/30 border border-emerald-200 dark:border-emerald-800">
                   <Info className="h-5 w-5 text-emerald-600 mt-0.5 shrink-0" />
                   <div className="text-sm text-emerald-800 dark:text-emerald-200">
-                    <p className="font-medium mb-1">Data Management Best Practices</p>
+                    <p className="font-medium mb-1">Best Practices für Datenverwaltung</p>
                     <ul className="list-disc list-inside space-y-1 text-xs">
                       <li>Always create a backup before performing bulk operations</li>
                       <li>Review the data preview before importing to catch errors early</li>
                       <li>Use column mapping to ensure correct field alignment</li>
                       <li>Run cleanup periodically to remove orphaned records</li>
-                      <li>Export data regularly for archival purposes</li>
+                      <li>Exportieren Sie regelmäßig Daten zur Archivierung</li>
                     </ul>
                   </div>
                 </div>

src/components/district-management-view.tsx

@@ -470,7 +470,7 @@ export default function DistrictManagementView() {
       <div className="flex items-center justify-center h-96">
         <div className="text-center space-y-3">
           <AlertTriangle className="h-12 w-12 text-amber-500 mx-auto" />
-          <p className="text-lg font-semibold text-gray-700 dark:text-gray-300">Access Denied</p>
+          <p className="text-lg font-semibold text-gray-700 dark:text-gray-300">Zugriff verweigert</p>
           <p className="text-sm text-gray-500 dark:text-gray-400">You need admin privileges to access this view.</p>
         </div>
       </div>

src/components/exam-session-monitor.tsx

@@ -99,7 +99,7 @@ export function ExamSessionMonitor({
             <div className="flex items-center gap-4">
               <div className="flex items-center gap-2 text-sm">
                 <Eye className="w-4 h-4 text-gray-500" />
-                <span className="text-gray-600">Exam Mode Active</span>
+                <span className="text-gray-600">Prüfungsmodus aktiv</span>
               </div>
 
               {securityMetrics.riskScore > 0 && (

src/components/professional-calendar.tsx

@@ -603,7 +603,7 @@ function EventCreatorDialog({
     <Dialog open onOpenChange={onClose}>
       <DialogContent>
         <DialogHeader>
-          <DialogTitle>Create Neues Ereignis</DialogTitle>
+          <DialogTitle>Neues Ereignis erstellen</DialogTitle>
         </DialogHeader>
 
         <div className="space-y-4">

src/components/ui/sidebar.tsx

@@ -274,7 +274,7 @@ function SidebarTrigger({
       {...props}
     >
       <PanelLeftIcon />
-      <span className="sr-only">Toggle Sidebar</span>
+      <span className="sr-only">Seitenleiste umschalten</span>
     </Button>
   )
 }