fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

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

admin-v2/components/companion/lesson-mode/LessonContainer.tsx

@@ -0,0 +1,80 @@
+'use client'
+
+import { LessonSession, LessonStatus } from '@/lib/companion/types'
+import { LessonStartForm } from './LessonStartForm'
+import { LessonActiveView } from './LessonActiveView'
+import { LessonEndedView } from './LessonEndedView'
+
+interface LessonContainerProps {
+  session: LessonSession | null
+  onStartLesson: (data: { classId: string; subject: string; topic?: string; templateId?: string }) => void
+  onEndLesson: () => void
+  onPauseToggle: () => void
+  onExtendTime: (minutes: number) => void
+  onSkipPhase: () => void
+  onSaveReflection: (rating: number, notes: string, nextSteps: string) => void
+  onAddHomework: (title: string, dueDate: string) => void
+  onRemoveHomework: (id: string) => void
+  loading?: boolean
+}
+
+export function LessonContainer({
+  session,
+  onStartLesson,
+  onEndLesson,
+  onPauseToggle,
+  onExtendTime,
+  onSkipPhase,
+  onSaveReflection,
+  onAddHomework,
+  onRemoveHomework,
+  loading,
+}: LessonContainerProps) {
+  // Determine which view to show based on session state
+  const getView = (): 'start' | 'active' | 'ended' => {
+    if (!session) return 'start'
+
+    const status = session.status
+    if (status === 'completed') return 'ended'
+    if (status === 'not_started') return 'start'
+
+    return 'active'
+  }
+
+  const view = getView()
+
+  if (view === 'start') {
+    return (
+      <LessonStartForm
+        onStart={onStartLesson}
+        loading={loading}
+      />
+    )
+  }
+
+  if (view === 'ended' && session) {
+    return (
+      <LessonEndedView
+        session={session}
+        onSaveReflection={onSaveReflection}
+        onAddHomework={onAddHomework}
+        onRemoveHomework={onRemoveHomework}
+        onStartNew={() => onEndLesson()} // This will clear the session and show start form
+      />
+    )
+  }
+
+  if (session) {
+    return (
+      <LessonActiveView
+        session={session}
+        onPauseToggle={onPauseToggle}
+        onExtendTime={onExtendTime}
+        onSkipPhase={onSkipPhase}
+        onEndLesson={onEndLesson}
+      />
+    )
+  }
+
+  return null
+}