[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/BacklogTab.tsx

@@ -0,0 +1,88 @@
+'use client'
+
+import type { Feature } from './types'
+import { priorityColors } from './types'
+
+interface BacklogTabProps {
+  features: Feature[]
+}
+
+export default function BacklogTab({ features }: BacklogTabProps) {
+  return (
+    <div>
+      <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
+        {/* Todo Column */}
+        <div className="bg-amber-50 rounded-xl p-4">
+          <h3 className="font-semibold text-amber-800 mb-3 flex items-center gap-2">
+            <span className="w-6 h-6 bg-amber-200 rounded-full flex items-center justify-center text-sm">
+              {features.filter(f => f.status === 'todo').length}
+            </span>
+            Todo
+          </h3>
+          <div className="space-y-2">
+            {features.filter(f => f.status === 'todo').map(f => (
+              <div key={f.id} className="bg-white p-3 rounded-lg shadow-sm">
+                <div className="font-medium text-sm text-slate-900">{f.title}</div>
+                <div className="text-xs text-slate-500 mt-1">{f.description}</div>
+                <div className="flex gap-1 mt-2">
+                  <span className={`px-1.5 py-0.5 rounded text-xs ${priorityColors[f.priority]}`}>
+                    {f.priority}
+                  </span>
+                  <span className="px-1.5 py-0.5 bg-slate-100 text-slate-600 rounded text-xs">
+                    {f.effort}
+                  </span>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+
+        {/* In Progress Column */}
+        <div className="bg-blue-50 rounded-xl p-4">
+          <h3 className="font-semibold text-blue-800 mb-3 flex items-center gap-2">
+            <span className="w-6 h-6 bg-blue-200 rounded-full flex items-center justify-center text-sm">
+              {features.filter(f => f.status === 'in_progress').length}
+            </span>
+            In Arbeit
+          </h3>
+          <div className="space-y-2">
+            {features.filter(f => f.status === 'in_progress').map(f => (
+              <div key={f.id} className="bg-white p-3 rounded-lg shadow-sm">
+                <div className="font-medium text-sm text-slate-900">{f.title}</div>
+                <div className="text-xs text-slate-500 mt-1">{f.description}</div>
+                <div className="flex gap-1 mt-2">
+                  <span className={`px-1.5 py-0.5 rounded text-xs ${priorityColors[f.priority]}`}>
+                    {f.priority}
+                  </span>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+
+        {/* Backlog Column */}
+        <div className="bg-slate-100 rounded-xl p-4">
+          <h3 className="font-semibold text-slate-700 mb-3 flex items-center gap-2">
+            <span className="w-6 h-6 bg-slate-300 rounded-full flex items-center justify-center text-sm">
+              {features.filter(f => f.status === 'backlog').length}
+            </span>
+            Backlog
+          </h3>
+          <div className="space-y-2">
+            {features.filter(f => f.status === 'backlog').map(f => (
+              <div key={f.id} className="bg-white p-3 rounded-lg shadow-sm">
+                <div className="font-medium text-sm text-slate-900">{f.title}</div>
+                <div className="text-xs text-slate-500 mt-1">{f.description}</div>
+                <div className="flex gap-1 mt-2">
+                  <span className={`px-1.5 py-0.5 rounded text-xs ${priorityColors[f.priority]}`}>
+                    {f.priority}
+                  </span>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}