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>

h5p-service/Dockerfile

@@ -0,0 +1,31 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Install dependencies
+RUN apk add --no-cache curl unzip
+
+# Copy package files
+COPY package*.json ./
+
+# Copy setup script (needed for postinstall)
+COPY setup-h5p.js ./
+
+# Install npm packages (postinstall will run setup-h5p.js)
+RUN npm install --production
+
+# Copy application code
+COPY . .
+
+# Create directories for H5P content
+RUN mkdir -p h5p-content h5p-libraries h5p-temp h5p-core
+
+# Expose port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:8080/health || exit 1
+
+# Start server (using simplified version for now)
+CMD ["node", "server-simple.js"]