refactor(admin): split academy/[id], iace/hazards, ai-act pages

Extracted components and constants into _components/ subdirectories
to bring all three pages under the 300 LOC soft target (was 651/628/612,
now 255/232/278 LOC respectively). Zero behavior changes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

admin-compliance/app/sdk/academy/[id]/_components/CourseStats.tsx

@@ -0,0 +1,33 @@
+'use client'
+
+import { Course, Lesson, Enrollment } from '@/lib/sdk/academy/types'
+
+interface CourseStatsProps {
+  course: Course
+  sortedLessons: Lesson[]
+  enrollments: Enrollment[]
+  completedEnrollments: number
+}
+
+export function CourseStats({ course, sortedLessons, enrollments, completedEnrollments }: CourseStatsProps) {
+  return (
+    <div className="grid grid-cols-4 gap-4">
+      <div className="bg-white rounded-xl border border-gray-200 p-4">
+        <div className="text-sm text-gray-500">Lektionen</div>
+        <div className="text-2xl font-bold text-gray-900">{sortedLessons.length}</div>
+      </div>
+      <div className="bg-white rounded-xl border border-gray-200 p-4">
+        <div className="text-sm text-gray-500">Dauer</div>
+        <div className="text-2xl font-bold text-gray-900">{course.durationMinutes} Min.</div>
+      </div>
+      <div className="bg-white rounded-xl border border-gray-200 p-4">
+        <div className="text-sm text-gray-500">Teilnehmer</div>
+        <div className="text-2xl font-bold text-blue-600">{enrollments.length}</div>
+      </div>
+      <div className="bg-white rounded-xl border border-gray-200 p-4">
+        <div className="text-sm text-gray-500">Abgeschlossen</div>
+        <div className="text-2xl font-bold text-green-600">{completedEnrollments}</div>
+      </div>
+    </div>
+  )
+}