[split-required] Split 500-1000 LOC files across all services

backend-lehrer (5 files):
- alerts_agent/db/repository.py (992 → 5), abitur_docs_api.py (956 → 3)
- teacher_dashboard_api.py (951 → 3), services/pdf_service.py (916 → 3)
- mail/mail_db.py (987 → 6)

klausur-service (5 files):
- legal_templates_ingestion.py (942 → 3), ocr_pipeline_postprocess.py (929 → 4)
- ocr_pipeline_words.py (876 → 3), ocr_pipeline_ocr_merge.py (616 → 2)
- KorrekturPage.tsx (956 → 6)

website (5 pages):
- mail (985 → 9), edu-search (958 → 8), mac-mini (950 → 7)
- ocr-labeling (946 → 7), audit-workspace (871 → 4)

studio-v2 (5 files + 1 deleted):
- page.tsx (946 → 5), MessagesContext.tsx (925 → 4)
- korrektur (914 → 6), worksheet-cleanup (899 → 6)
- useVocabWorksheet.ts (888 → 3)
- Deleted dead page-original.tsx (934 LOC)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/app/admin/mac-mini/_components/InternetStatus.tsx

@@ -0,0 +1,56 @@
+'use client'
+
+import { INTERNET_REQUIRED_ACTIONS } from '../constants'
+
+export default function InternetStatus({ internet }: { internet?: boolean }) {
+  return (
+    <div className={`rounded-xl border p-4 mb-6 ${
+      internet
+        ? 'bg-green-50 border-green-200'
+        : 'bg-amber-50 border-amber-200'
+    }`}>
+      <div className="flex items-start justify-between">
+        <div className="flex gap-3">
+          <span className="text-2xl">{internet ? '🌐' : '📴'}</span>
+          <div>
+            <h3 className={`font-semibold ${internet ? 'text-green-900' : 'text-amber-900'}`}>
+              Internet: {internet ? 'Verbunden' : 'Offline (Normalbetrieb)'}
+            </h3>
+            <p className={`text-sm mt-1 ${internet ? 'text-green-700' : 'text-amber-700'}`}>
+              {internet
+                ? 'Mac Mini hat Internet-Zugang. LLM-Downloads und Updates möglich.'
+                : 'Mac Mini arbeitet offline. Für bestimmte Aktionen muss Internet aktiviert werden.'}
+            </p>
+          </div>
+        </div>
+        <span className={`px-3 py-1 rounded-full text-sm font-semibold ${
+          internet
+            ? 'bg-green-100 text-green-800'
+            : 'bg-amber-100 text-amber-800'
+        }`}>
+          {internet ? 'Online' : 'Offline'}
+        </span>
+      </div>
+
+      {!internet && (
+        <div className="mt-4 pt-4 border-t border-amber-200">
+          <h4 className="font-medium text-amber-900 mb-2">⚠️ Diese Aktionen benötigen Internet:</h4>
+          <div className="grid grid-cols-1 md:grid-cols-2 gap-2">
+            {INTERNET_REQUIRED_ACTIONS.map((item, idx) => (
+              <div key={idx} className="flex items-start gap-2 text-sm">
+                <span className="text-amber-600 mt-0.5">•</span>
+                <div>
+                  <span className="font-medium text-amber-800">{item.action}</span>
+                  <span className="text-amber-600 ml-1">– {item.description}</span>
+                </div>
+              </div>
+            ))}
+          </div>
+          <p className="text-xs text-amber-600 mt-3 italic">
+            💡 Tipp: Internet am Router/Switch nur bei Bedarf für den Mac Mini aktivieren.
+          </p>
+        </div>
+      )}
+    </div>
+  )
+}