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/app/api/development/content/route.ts

@@ -0,0 +1,68 @@
+/**
+ * Content API Route
+ *
+ * GET: Load current website content
+ * POST: Save changed content (Admin only)
+ */
+
+import { NextRequest, NextResponse } from 'next/server'
+import { getContent, saveContent } from '@/lib/content'
+import type { WebsiteContent } from '@/lib/content-types'
+
+// GET - Load content
+export async function GET() {
+  try {
+    const content = getContent()
+    return NextResponse.json(content)
+  } catch (error) {
+    console.error('Error loading content:', error)
+    return NextResponse.json(
+      { error: 'Failed to load content' },
+      { status: 500 }
+    )
+  }
+}
+
+// POST - Save content
+export async function POST(request: NextRequest) {
+  try {
+    // Simple admin check via header or query
+    // In production: JWT/Session-based auth
+    const adminKey = request.headers.get('x-admin-key')
+    const expectedKey = process.env.ADMIN_API_KEY || 'breakpilot-admin-2024'
+
+    if (adminKey !== expectedKey) {
+      return NextResponse.json(
+        { error: 'Unauthorized' },
+        { status: 401 }
+      )
+    }
+
+    const content: WebsiteContent = await request.json()
+
+    // Validation
+    if (!content.hero || !content.features || !content.faq || !content.pricing) {
+      return NextResponse.json(
+        { error: 'Invalid content structure' },
+        { status: 400 }
+      )
+    }
+
+    const result = saveContent(content)
+
+    if (result.success) {
+      return NextResponse.json({ success: true, message: 'Content saved' })
+    } else {
+      return NextResponse.json(
+        { error: result.error || 'Failed to save content' },
+        { status: 500 }
+      )
+    }
+  } catch (error) {
+    console.error('Error saving content:', error)
+    return NextResponse.json(
+      { error: error instanceof Error ? error.message : 'Failed to save content' },
+      { status: 500 }
+    )
+  }
+}