[split-required] Split final batch of monoliths >1000 LOC

Python (6 files in klausur-service):
- rbac.py (1,132 → 4), admin_api.py (1,012 → 4)
- routes/eh.py (1,111 → 4), ocr_pipeline_geometry.py (1,105 → 5)

Python (2 files in backend-lehrer):
- unit_api.py (1,226 → 6), game_api.py (1,129 → 5)

Website (6 page files):
- 4x klausur-korrektur pages (1,249-1,328 LOC each) → shared components
  in website/components/klausur-korrektur/ (17 shared files)
- companion (1,057 → 10), magic-help (1,017 → 8)

All re-export barrels preserve backward compatibility.
Zero import errors verified.

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

website/app/admin/companion/_components/StatsOverview.tsx

@@ -0,0 +1,34 @@
+'use client'
+
+interface StatsOverviewProps {
+  phaseStats: { completed: number; total: number; inProgress: number }
+  featureStats: { percentage: number; done: number; total: number }
+  feedbackStats: { newCount: number; total: number; bugs: number; requests: number }
+}
+
+export default function StatsOverview({ phaseStats, featureStats, feedbackStats }: StatsOverviewProps) {
+  return (
+    <div className="grid grid-cols-1 md:grid-cols-4 gap-4 mb-6">
+      <div className="bg-white rounded-xl border border-slate-200 p-4">
+        <div className="text-sm text-slate-500 mb-1">Roadmap-Phasen</div>
+        <div className="text-2xl font-bold text-primary-600">{phaseStats.completed}/{phaseStats.total}</div>
+        <div className="text-xs text-slate-400">{phaseStats.inProgress} in Arbeit</div>
+      </div>
+      <div className="bg-white rounded-xl border border-slate-200 p-4">
+        <div className="text-sm text-slate-500 mb-1">Features</div>
+        <div className="text-2xl font-bold text-green-600">{featureStats.percentage}%</div>
+        <div className="text-xs text-slate-400">{featureStats.done}/{featureStats.total} fertig</div>
+      </div>
+      <div className="bg-white rounded-xl border border-slate-200 p-4">
+        <div className="text-sm text-slate-500 mb-1">Neues Feedback</div>
+        <div className="text-2xl font-bold text-amber-600">{feedbackStats.newCount}</div>
+        <div className="text-xs text-slate-400">{feedbackStats.total} gesamt</div>
+      </div>
+      <div className="bg-white rounded-xl border border-slate-200 p-4">
+        <div className="text-sm text-slate-500 mb-1">Offene Bugs</div>
+        <div className="text-2xl font-bold text-red-600">{feedbackStats.bugs}</div>
+        <div className="text-xs text-slate-400">{feedbackStats.requests} Feature-Requests</div>
+      </div>
+    </div>
+  )
+}