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>

website/README.md

@@ -0,0 +1,144 @@
+# BreakPilot Website
+
+Marketing- und Pricing-Website fuer BreakPilot mit Stripe Checkout Integration.
+
+## Tech Stack
+
+- **Framework:** Next.js 15.1.6
+- **Styling:** Tailwind CSS 3.4
+- **Language:** TypeScript 5.7
+- **Payment:** Stripe Checkout (via Billing Service)
+
+## Lokale Entwicklung
+
+### Voraussetzungen
+
+- Node.js 20+
+- npm oder yarn
+
+### Installation
+
+```bash
+cd website
+npm install
+npm run dev
+```
+
+Website ist dann unter http://localhost:3000 erreichbar.
+
+## Docker
+
+### Build
+
+```bash
+docker build -t breakpilot-website \
+  --build-arg NEXT_PUBLIC_BILLING_API_URL=http://localhost:8083 \
+  --build-arg NEXT_PUBLIC_APP_URL=http://localhost:8000 \
+  .
+```
+
+### Run
+
+```bash
+docker run -p 3000:3000 breakpilot-website
+```
+
+### Mit Docker Compose
+
+```bash
+# Aus dem Root-Verzeichnis
+docker compose up -d website
+```
+
+## Umgebungsvariablen
+
+| Variable | Beschreibung | Default |
+|----------|--------------|---------|
+| `NEXT_PUBLIC_BILLING_API_URL` | URL zum Billing Service | `http://localhost:8083` |
+| `NEXT_PUBLIC_APP_URL` | URL zur BreakPilot App | `http://localhost:8000` |
+| `NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY` | Stripe Public Key | - |
+
+### Build-Zeit vs. Runtime
+
+NEXT_PUBLIC_* Variablen werden zur Build-Zeit eingebettet. Fuer Docker:
+
+```bash
+docker build \
+  --build-arg NEXT_PUBLIC_BILLING_API_URL=https://api.breakpilot.de \
+  --build-arg NEXT_PUBLIC_APP_URL=https://app.breakpilot.de \
+  --build-arg NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=pk_live_xxx \
+  .
+```
+
+## Stripe Integration
+
+### Flow
+
+1. Nutzer waehlt Plan auf der Pricing-Seite
+2. Nutzer gibt E-Mail ein
+3. Website ruft `POST /api/v1/billing/trial/start` am Billing Service auf
+4. Billing Service erstellt Stripe Checkout Session
+5. Nutzer wird zu Stripe Checkout weitergeleitet
+6. Nach Zahlung: Redirect zu `/success?session_id=xxx`
+7. Success-Seite zeigt Bestaetigung und leitet zur App weiter
+
+### API Endpunkt
+
+```
+POST /api/v1/billing/trial/start
+Content-Type: application/json
+
+{
+  "plan_id": "basic" | "standard" | "premium",
+  "email": "user@example.com"
+}
+
+Response:
+{
+  "checkout_url": "https://checkout.stripe.com/..."
+}
+```
+
+## Seiten
+
+| Route | Beschreibung |
+|-------|--------------|
+| `/` | Landing Page mit Hero, Pricing, Trust-Sektion |
+| `/success` | Erfolgsseite nach Stripe Checkout |
+| `/cancel` | Abbruchseite wenn Checkout abgebrochen |
+
+## Produktion
+
+### Empfohlene Konfiguration
+
+```env
+NEXT_PUBLIC_BILLING_API_URL=https://api.breakpilot.de
+NEXT_PUBLIC_APP_URL=https://app.breakpilot.de
+NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=pk_live_xxx
+```
+
+### SSL/TLS
+
+Fuer Produktion sollte ein Reverse Proxy (nginx, Traefik) mit SSL verwendet werden.
+
+## Projektstruktur
+
+```
+website/
+├── app/
+│   ├── globals.css      # Tailwind + Custom Styles
+│   ├── layout.tsx       # Root Layout
+│   ├── page.tsx         # Landing Page
+│   ├── success/
+│   │   └── page.tsx     # Checkout Erfolgsseite
+│   └── cancel/
+│       └── page.tsx     # Checkout Abbruchseite
+├── components/
+│   ├── Header.tsx       # Navigation
+│   ├── PricingSection.tsx # Pricing Cards + Modal
+│   └── Footer.tsx       # Footer
+├── Dockerfile           # Multi-stage Docker Build
+├── next.config.mjs      # Next.js Konfiguration
+├── tailwind.config.ts   # Tailwind mit BreakPilot Farben
+└── package.json
+```