Update CLAUDE.md, MkDocs, nginx docs proxy, .claude/rules

- CLAUDE.md: Comprehensive documentation for core infrastructure
- docs-src: Cleaned 316MB junk, kept only markdown docs
- mkdocs.yml: Updated nav for core-only content
- nginx: Docs proxy targets split (3002->lehrer, 3007->compliance)
- docker-compose: Fixed docs port mapping (8009:80), added INSTALL_LOCK
- .claude/rules: testing, documentation, open-source-policy, night-scheduler

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

mkdocs.yml

@@ -1,5 +1,5 @@
-site_name: Breakpilot Dokumentation
-site_url: https://macmini:8008
+site_name: BreakPilot Core - Dokumentation
+site_url: https://macmini:8009
 docs_dir: docs-src
 site_dir: docs-site
 
@@ -9,14 +9,16 @@ theme:
   palette:
     - scheme: default
       primary: teal
+      accent: teal
       toggle:
         icon: material/brightness-7
-        name: Dark Mode aktivieren
+        name: Dark Mode
     - scheme: slate
       primary: teal
+      accent: teal
       toggle:
         icon: material/brightness-4
-        name: Light Mode aktivieren
+        name: Light Mode
   features:
     - search.highlight
     - search.suggest
@@ -25,7 +27,6 @@ theme:
     - navigation.expand
     - navigation.top
     - content.code.copy
-    - content.tabs.link
     - toc.follow
 
 plugins:
@@ -52,46 +53,18 @@ markdown_extensions:
   - toc:
       permalink: true
 
-extra:
-  social:
-    - icon: fontawesome/brands/github
-      link: http://macmini:3003/breakpilot/breakpilot-pwa
-
 nav:
   - Start: index.md
   - Erste Schritte:
-    - Umgebung einrichten: getting-started/environment-setup.md
+    - Einrichtung: getting-started/environment-setup.md
     - Mac Mini Setup: getting-started/mac-mini-setup.md
   - Architektur:
-    - Systemuebersicht: architecture/system-architecture.md
+    - System-Architektur: architecture/system-architecture.md
     - Auth-System: architecture/auth-system.md
-    - Mail-RBAC: architecture/mail-rbac-architecture.md
-    - Multi-Agent: architecture/multi-agent.md
+    - Mail & RBAC: architecture/mail-rbac-architecture.md
     - Secrets Management: architecture/secrets-management.md
     - DevSecOps: architecture/devsecops.md
     - Environments: architecture/environments.md
-    - Zeugnis-System: architecture/zeugnis-system.md
-  - Services:
-    - KI-Daten-Pipeline:
-      - Uebersicht: services/ki-daten-pipeline/index.md
-      - Architektur: services/ki-daten-pipeline/architecture.md
-    - Klausur-Service:
-      - Uebersicht: services/klausur-service/index.md
-      - BYOEH Architektur: services/klausur-service/BYOEH-Architecture.md
-      - BYOEH Developer Guide: services/klausur-service/BYOEH-Developer-Guide.md
-      - NiBiS Pipeline: services/klausur-service/NiBiS-Ingestion-Pipeline.md
-      - OCR Labeling: services/klausur-service/OCR-Labeling-Spec.md
-      - OCR Compare: services/klausur-service/OCR-Compare.md
-      - RAG Admin: services/klausur-service/RAG-Admin-Spec.md
-      - Worksheet Editor: services/klausur-service/Worksheet-Editor-Architecture.md
-    - Voice-Service: services/voice-service/index.md
-    - Agent-Core: services/agent-core/index.md
-    - AI-Compliance-SDK:
-      - Uebersicht: services/ai-compliance-sdk/index.md
-      - Architektur: services/ai-compliance-sdk/ARCHITECTURE.md
-      - Developer Guide: services/ai-compliance-sdk/DEVELOPER.md
-      - Auditor Dokumentation: services/ai-compliance-sdk/AUDITOR_DOCUMENTATION.md
-      - SBOM: services/ai-compliance-sdk/SBOM.md
   - API:
     - Backend API: api/backend-api.md
   - Entwicklung: