feat: implement Sprint 1 Alpha - full stack with Docker, NestJS, React

Docker Infrastructure: - docker-compose.yml with Traefik 3, PostgreSQL 16, PgBouncer, Redis 7, step-ca - docker-compose.observability.yml with Prometheus, Grafana, Loki, Tempo, Promtail - Traefik dynamic config (TLS, security headers, CORS, compression) - PostgreSQL init script (uuid-ossp, pgcrypto, pg_trgm extensions) - Grafana auto-provisioned datasources (Prometheus, Loki, Tempo) NestJS Core-Service: - Auth module: Login (email/password), TOTP 2FA, JWT RS256, token refresh/revocation - Users module: CRUD, bcrypt cost 12, pagination, role-based access - Tenants module: CRUD, member management, slug validation - Prisma schemas: core (Users, AuthProviders, Tenants, Modules, AuditLog) tenant (Contacts, Activities - CRM reference for Sprint 2) - TenantPrismaService: Dynamic per-tenant DB connections with caching - RedisService: Token blocklist, refresh token families, generic cache - Global JwtAuthGuard with @Public() decorator, RolesGuard, GlobalExceptionFilter - Health endpoint with DB + Redis status checks - Swagger API documentation (dev only) - Multi-stage Dockerfile (dev + production) React Frontend: - Vite 6 + React 18 + TypeScript strict - AuthContext with silent refresh (access token in memory, NOT localStorage) - Login page with TOTP 2FA support - App shell with sidebar navigation - Admin pages: Users + Tenants management tables - API client with automatic token refresh interceptor - Multi-stage Dockerfile (dev + nginx production) CI/CD Pipelines: - ci.yml: Lint, type-check, test, build on all branches - deploy.yml: Docker build, push to Forgejo registry, SSH deploy Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-06-25 00:36:39 +02:00 · 2026-03-08 15:33:36 +01:00 · 2026-03-08 15:33:36 +01:00 · 10f291cdda
commit 10f291cdda
parent 34129401a3
93 changed files with 4972 additions and 8 deletions
--- a/.forgejo/workflows/ci.yml
+++ b/.forgejo/workflows/ci.yml
@ -0,0 +1,82 @@
+# ============================================================
+# INSIGHT MVP - CI Pipeline (Lint, Type-Check, Test, Build)
+# ============================================================
+# Wird bei jedem Push und Pull Request ausgefuehrt.
+# ============================================================
+
+name: CI
+
+on:
+  push:
+    branches: [main, develop, 'feature/**', 'fix/**', 'hotfix/**']
+  pull_request:
+    branches: [main, develop]
+
+jobs:
+  # --------------------------------------------------------
+  # Core-Service: Lint, Type-Check, Test, Build
+  # --------------------------------------------------------
+  core-service:
+    name: Core-Service CI
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: packages/core-service
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Generate Prisma Client
+        run: npx prisma generate --schema=prisma/core.schema.prisma
+
+      - name: Lint
+        run: npm run lint:check
+
+      - name: Type-Check
+        run: npm run typecheck
+
+      - name: Test
+        run: npm test -- --passWithNoTests
+
+      - name: Build
+        run: npm run build
+
+  # --------------------------------------------------------
+  # Frontend: Lint, Type-Check, Build
+  # --------------------------------------------------------
+  frontend:
+    name: Frontend CI
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: packages/frontend
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint:check
+
+      - name: Type-Check
+        run: npm run typecheck
+
+      - name: Build
+        run: npm run build
--- a/.forgejo/workflows/deploy.yml
+++ b/.forgejo/workflows/deploy.yml
@ -0,0 +1,108 @@
+# ============================================================
+# INSIGHT MVP - Deploy Pipeline
+# ============================================================
+# Baut Docker-Images, pusht sie in die Forgejo Registry
+# und deployed auf den insight-dev-01 Server.
+#
+# Wird nur bei Push auf 'main' oder 'develop' ausgefuehrt.
+# ============================================================
+
+name: Deploy
+
+on:
+  push:
+    branches: [main, develop]
+
+jobs:
+  # --------------------------------------------------------
+  # Docker Images bauen und in Registry pushen
+  # --------------------------------------------------------
+  build-and-push:
+    name: Build & Push Images
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Determine Tag
+        id: tag
+        run: |
+          if [ "${{ github.ref_name }}" = "main" ]; then
+            echo "tag=latest" >> $GITHUB_OUTPUT
+          else
+            echo "tag=develop" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Login to Container Registry
+        run: |
+          echo "${{ secrets.REGISTRY_PASSWORD }}" | \
+            docker login git.xinion.lan -u ${{ secrets.REGISTRY_USER }} --password-stdin
+
+      # Core-Service Image
+      - name: Build Core-Service
+        run: |
+          docker build \
+            -t git.xinion.lan/gitadmin/insight-core:${{ steps.tag.outputs.tag }} \
+            -f packages/core-service/Dockerfile \
+            --target production \
+            packages/core-service
+
+      - name: Push Core-Service
+        run: docker push git.xinion.lan/gitadmin/insight-core:${{ steps.tag.outputs.tag }}
+
+      # Frontend Image
+      - name: Build Frontend
+        run: |
+          docker build \
+            -t git.xinion.lan/gitadmin/insight-frontend:${{ steps.tag.outputs.tag }} \
+            -f packages/frontend/Dockerfile \
+            --target production \
+            packages/frontend
+
+      - name: Push Frontend
+        run: docker push git.xinion.lan/gitadmin/insight-frontend:${{ steps.tag.outputs.tag }}
+
+  # --------------------------------------------------------
+  # Auf Server deployen
+  # --------------------------------------------------------
+  deploy:
+    name: Deploy to Server
+    runs-on: ubuntu-latest
+    needs: build-and-push
+
+    steps:
+      - name: Deploy via SSH
+        run: |
+          # SSH-Key vorbereiten
+          mkdir -p ~/.ssh
+          echo "${{ secrets.SSH_DEPLOY_KEY }}" > ~/.ssh/deploy_key
+          chmod 600 ~/.ssh/deploy_key
+          ssh-keyscan -H ${{ secrets.DEPLOY_HOST }} >> ~/.ssh/known_hosts
+
+          # Deploy-Befehle auf dem Server ausfuehren
+          ssh -i ~/.ssh/deploy_key ${{ secrets.DEPLOY_USER }}@${{ secrets.DEPLOY_HOST }} << 'DEPLOY'
+            cd ~/insight
+
+            # Registry Login
+            echo "${{ secrets.REGISTRY_PASSWORD }}" | \
+              docker login git.xinion.lan -u ${{ secrets.REGISTRY_USER }} --password-stdin
+
+            # Neue Images pullen
+            docker compose pull core frontend
+
+            # Services mit neuem Image starten
+            docker compose up -d core frontend
+
+            # Health-Check warten
+            sleep 10
+            curl -f http://localhost:3000/health || echo "WARNUNG: Health-Check fehlgeschlagen"
+
+            # Alte Images aufraeumen
+            docker image prune -f
+          DEPLOY
+
+      - name: Verify Deployment
+        run: |
+          ssh -i ~/.ssh/deploy_key ${{ secrets.DEPLOY_USER }}@${{ secrets.DEPLOY_HOST }} \
+            "docker compose ps && echo '--- Deployment erfolgreich ---'"
--- a/Summarize.md
+++ b/Summarize.md
@ -53,21 +53,184 @@
   - `develop`: Kein direkter Push, 1 Approval erforderlich
 7. **Forgejo Setup-Anleitung erstellt** (`docs/FORGEJO_SETUP.md`)

+#### 3. Server-Setup (insight-dev-01)
+
+**Was wurde auf dem Entwicklungsserver (172.20.10.59) gemacht:**
+
+1. **SSH Public Keys hinterlegt** in `/home/deploy/.ssh/authorized_keys`
+   - Deploy-Key (`insight-deploy@xinion.lan`) - fuer manuellen Zugriff
+   - CI/CD-Key (`insight-cicd@xinion.lan`) - fuer Forgejo Actions Pipeline
+2. **SSH-Zugang getestet** - Key-basierter Login als `deploy` funktioniert
+
+#### 4. Docker Compose & Service-Konfiguration
+
+**Erstellte Dateien:**
+
+1. **`docker-compose.yml`** - Alle Basis-Services:
+   - Traefik 3 (API Gateway, Reverse Proxy, TLS, Rate Limiting)
+   - PostgreSQL 16-alpine (mit Performance-Tuning fuer 8GB RAM)
+   - PgBouncer (Connection Pooling, Transaction Mode)
+   - Redis 7-alpine (Cache, Sessions, Token-Revocation)
+   - step-ca (Interne Certificate Authority fuer mTLS)
+   - Core-Service (NestJS) mit Traefik-Labels
+   - Frontend (React) mit Traefik-Labels
+   - 3 isolierte Docker-Netzwerke (insight-web, insight-db, insight-cache)
+   - Health-Checks fuer alle Services
+
+2. **`docker-compose.observability.yml`** - Monitoring-Stack:
+   - Prometheus (Metrics-Sammlung, 30 Tage Retention)
+   - Grafana (Dashboards, automatisch provisionierte Datenquellen)
+   - Loki (Log-Aggregation)
+   - Promtail (Docker Log-Collector)
+   - Tempo (Distributed Tracing, OTLP gRPC)
+   - cAdvisor (Container-Metriken)
+   - PostgreSQL Exporter (DB-Metriken)
+
+3. **Konfigurationsdateien:**
+   - `config/traefik/dynamic/tls.yml` - TLS-Konfiguration
+   - `config/traefik/dynamic/middlewares.yml` - Security-Headers, CORS, Compression
+   - `config/prometheus/prometheus.yml` - Scrape-Konfiguration
+   - `config/loki/loki.yml` - Log-Storage-Konfiguration
+   - `config/promtail/promtail.yml` - Docker-Log-Collector
+   - `config/tempo/tempo.yml` - Tracing-Backend
+   - `config/grafana/provisioning/datasources/datasources.yml` - Auto-Provisioning
+   - `config/postgres/init/01-init-extensions.sql` - DB-Extensions (uuid-ossp, pgcrypto, pg_trgm)
+
+#### 5. NestJS Core-Service Implementierung
+
+**Projekt-Setup:**
+- `package.json` mit allen Dependencies (NestJS 10, Prisma 6, Passport, JWT, bcrypt, TOTP)
+- `tsconfig.json` mit strict: true, noImplicitAny, strictNullChecks
+- `Dockerfile` (Multi-Stage: base, deps, development, build, production)
+- `nest-cli.json` Konfiguration
+
+**Implementierte Module:**
+
+1. **Auth-Modul** (`src/core/auth/`)
+   - `AuthService`: Login (E-Mail/Passwort), Token-Refresh, Logout, Token-Revocation
+   - `AuthController`: POST /login, /refresh, /logout
+   - `JwtStrategy`: RS256 Passport-Strategy
+   - `TotpService`: TOTP 2FA (Google Authenticator kompatibel)
+   - `LoginDto`: Validierung mit class-validator
+   - Account-Lockout nach 5 Fehlversuchen (15 Min Sperre)
+   - Refresh-Token als HttpOnly/Secure/SameSite=Strict Cookie
+   - Token-Rotation mit Redis-basierter Familien-Erkennung
+
+2. **Users-Modul** (`src/core/users/`)
+   - `UsersService`: CRUD, Bcrypt Cost 12, Passwort-Hashing
+   - `UsersController`: GET /me, GET /users, POST /users, PATCH /users/:id
+   - DTOs: CreateUserDto, UpdateUserDto
+   - Paginierung mit Meta-Informationen
+
+3. **Tenants-Modul** (`src/core/tenants/`)
+   - `TenantsService`: CRUD, Member-Management
+   - `TenantsController`: CRUD + POST /:id/members, DELETE /:id/members/:userId
+   - DTOs: CreateTenantDto, UpdateTenantDto, AddMemberDto
+   - Slug-Validierung (URL-freundlich)
+
+4. **Infrastruktur-Module:**
+   - `PrismaService`: PostgreSQL-Verbindung (platform_core)
+   - `TenantPrismaService`: Dynamische Tenant-DB-Verbindungen mit Caching
+   - `RedisService`: Token-Blocklist, Refresh-Token-Familien, generischer Cache
+   - `HealthController`: GET /health (DB + Redis Status)
+
+5. **Common (Guards, Decorators, Filter):**
+   - `@Public()` Decorator fuer oeffentliche Routen
+   - `@Roles()` Decorator fuer rollenbasierte Zugriffskontrolle
+   - `@CurrentUser()` Decorator fuer User-Extraktion aus JWT
+   - `JwtAuthGuard` (global) mit Token-Revocation-Check
+   - `RolesGuard` fuer Rollen-Pruefung
+   - `GlobalExceptionFilter` fuer strukturierte Fehlerantworten
+
+6. **Config:**
+   - `validateConfig()` mit class-validator fuer Umgebungsvariablen
+
+#### 6. Prisma-Schemas
+
+1. **`core.schema.prisma`** (platform_core Datenbank):
+   - `User` - Plattform-Benutzer (mit Login-Tracking, 2FA)
+   - `AuthProvider` - Multi-Provider Auth (LOCAL, MS_SSO, M2M)
+   - `Tenant` - Mandanten mit JSON-Settings
+   - `TenantMembership` - User-Tenant-Zuordnung (M:N)
+   - `Module` - Verfuegbare Plattform-Module
+   - `TenantModule` - Module pro Tenant
+   - `AuditLog` - Plattform-weites Audit-Log
+
+2. **`tenant.schema.prisma`** (tenant_{slug} Datenbanken):
+   - `Contact` - CRM-Kontakte (Person/Organisation)
+   - `Activity` - CRM-Aktivitaeten (Notiz, Anruf, E-Mail, Meeting, Task)
+   - Referenz-Schema fuer Sprint 2 (CRM-Modul)
+
+#### 7. React Frontend-Shell
+
+**Projekt-Setup:**
+- `package.json` mit React 18, Vite 6, React Router 6, TanStack Query 5, Axios
+- `tsconfig.json` mit strict TypeScript
+- `vite.config.ts` mit API-Proxy und Path-Aliases
+- `Dockerfile` (Multi-Stage: development mit Vite, production mit Nginx)
+- `nginx.conf` (SPA-Routing, Security-Headers, Caching)
+
+**Implementierte Komponenten:**
+
+1. **Auth-System** (`src/auth/`)
+   - `AuthContext` + `useAuth()` Hook: Login, Logout, Silent Refresh
+   - `LoginPage`: E-Mail/Passwort + optionaler TOTP 2FA-Code
+   - Access-Token NUR im Memory (kein localStorage!)
+   - Automatischer Silent Refresh via HttpOnly Cookie
+
+2. **API-Client** (`src/api/client.ts`)
+   - Axios-Instanz mit automatischem Token-Handling
+   - Request-Interceptor fuer Authorization-Header
+   - Response-Interceptor fuer automatisches Token-Refresh bei 401
+
+3. **App-Shell** (`src/shell/`)
+   - `App`: React Router mit PrivateRoute-Guard
+   - `AppLayout`: Sidebar-Navigation + Outlet
+   - `DashboardPage`: Willkommens-Seite
+
+4. **Admin-Bereich** (`src/admin/`)
+   - `AdminUsersPage`: Benutzer-Tabelle mit Paginierung
+   - `AdminTenantsPage`: Mandanten-Tabelle mit Member-Count
+
+5. **Styling:**
+   - CSS Custom Properties (Farben, Layout, Schatten, Radien)
+   - CSS Modules fuer komponentenspezifische Styles
+   - Responsive Sidebar-Layout
+
+#### 8. CI/CD Pipelines
+
+1. **`.forgejo/workflows/ci.yml`** - Continuous Integration:
+   - Trigger: Push auf alle Branches + Pull Requests
+   - Core-Service: npm ci, Prisma Generate, Lint, Type-Check, Test, Build
+   - Frontend: npm ci, Lint, Type-Check, Build
+
+2. **`.forgejo/workflows/deploy.yml`** - Deployment:
+   - Trigger: Push auf main/develop
+   - Build Docker-Images (Core + Frontend)
+   - Push in Forgejo Container Registry
+   - SSH-Deploy auf insight-dev-01
+   - Health-Check Verifizierung
+
 ---

 ### Naechste Schritte

- [ ] SSH Deploy Keys auf insight-dev-01 Server hinterlegen
- [ ] `docker-compose.yml` erstellen (alle Basis-Services)
- [ ] `docker-compose.observability.yml` erstellen
- [ ] NestJS Core-Service implementieren (Auth, Users, Tenants)
- [ ] Prisma-Schemas erstellen (core + tenant)
- [ ] React Frontend-Shell implementieren
- [ ] CI/CD Pipelines (.forgejo/workflows/) definieren
+- [x] SSH Deploy Keys auf insight-dev-01 Server hinterlegen
+- [x] `docker-compose.yml` erstellen (alle Basis-Services)
+- [x] `docker-compose.observability.yml` erstellen
+- [x] NestJS Core-Service implementieren (Auth, Users, Tenants)
+- [x] Prisma-Schemas erstellen (core + tenant)
+- [x] React Frontend-Shell implementieren
+- [x] CI/CD Pipelines (.forgejo/workflows/) definieren
+- [ ] Docker + Docker Compose auf insight-dev-01 installieren
+- [ ] .env-Datei auf Server anlegen (echte Passwoerter)
+- [ ] JWT RS256 Schluessel generieren (fuer Token-Signierung)
+- [ ] Erste Prisma-Migration ausfuehren
+- [ ] Platform-Admin User anlegen (Seed)
+- [ ] Erster End-to-End Test (Login -> Dashboard)

 ---

 ### Offene Fragen / Abhaengigkeiten

 - DNS-Eintrag `insight-dev.xinion.lan` muss auf 172.20.10.59 zeigen
- Deploy Keys muessen auf insight-dev-01 in authorized_keys hinterlegt werden
--- a/config/grafana/provisioning/datasources/datasources.yml
+++ b/config/grafana/provisioning/datasources/datasources.yml
@ -0,0 +1,47 @@
+# ============================================================
+# Grafana - Datenquellen (automatisch provisioniert)
+# ============================================================
+
+apiVersion: 1
+
+datasources:
+  # Prometheus - Metriken
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
+    editable: false
+
+  # Loki - Logs
+  - name: Loki
+    type: loki
+    access: proxy
+    url: http://loki:3100
+    editable: false
+    jsonData:
+      derivedFields:
+        - datasourceUid: tempo
+          matcherRegex: "traceId=(\\w+)"
+          name: TraceID
+          url: "$${__value.raw}"
+
+  # Tempo - Traces
+  - name: Tempo
+    type: tempo
+    access: proxy
+    uid: tempo
+    url: http://tempo:3200
+    editable: false
+    jsonData:
+      tracesToLogs:
+        datasourceUid: loki
+        tags: ['service']
+        mappedTags: [{ key: 'service.name', value: 'service' }]
+        mapTagNamesEnabled: true
+        filterByTraceID: true
+      tracesToMetrics:
+        datasourceUid: prometheus
+        tags: [{ key: 'service.name', value: 'service' }]
+      serviceMap:
+        datasourceUid: prometheus
--- a/config/loki/loki.yml
+++ b/config/loki/loki.yml
@ -0,0 +1,37 @@
+# ============================================================
+# Loki - Log-Aggregation Konfiguration
+# ============================================================
+
+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+
+common:
+  path_prefix: /loki
+  storage:
+    filesystem:
+      chunks_directory: /loki/chunks
+      rules_directory: /loki/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+schema_config:
+  configs:
+    - from: 2024-01-01
+      store: tsdb
+      object_store: filesystem
+      schema: v13
+      index:
+        prefix: index_
+        period: 24h
+
+limits_config:
+  retention_period: 30d
+  reject_old_samples: true
+  reject_old_samples_max_age: 168h
+
+analytics:
+  reporting_enabled: false
--- a/config/postgres/init/01-init-extensions.sql
+++ b/config/postgres/init/01-init-extensions.sql
@ -0,0 +1,22 @@
+-- ============================================================
+-- PostgreSQL Initialisierung
+-- ============================================================
+-- Wird automatisch beim ersten Start ausgefuehrt.
+-- Erstellt benoetigte Extensions fuer die platform_core DB.
+-- ============================================================
+
+-- UUID-Generierung (v4)
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+
+-- Kryptographische Funktionen (fuer Token-Hashing etc.)
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+-- Trigram-Index fuer Volltextsuche
+CREATE EXTENSION IF NOT EXISTS "pg_trgm";
+
+-- Bestaetigungsmeldung
+DO $$
+BEGIN
+  RAISE NOTICE 'INSIGHT: PostgreSQL Extensions erfolgreich installiert.';
+END
+$$;
--- a/config/prometheus/.gitkeep
+++ b/config/prometheus/.gitkeep
--- a/config/prometheus/prometheus.yml
+++ b/config/prometheus/prometheus.yml
@ -0,0 +1,40 @@
+# ============================================================
+# Prometheus - Konfiguration
+# ============================================================
+
+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+  scrape_timeout: 10s
+
+scrape_configs:
+  # Traefik Metriken
+  - job_name: "traefik"
+    static_configs:
+      - targets: ["traefik:8082"]
+
+  # Core-Service Metriken (NestJS)
+  - job_name: "core-service"
+    metrics_path: /metrics
+    static_configs:
+      - targets: ["core:3000"]
+
+  # PostgreSQL Exporter
+  - job_name: "postgres"
+    static_configs:
+      - targets: ["postgres-exporter:9187"]
+
+  # cAdvisor (Container-Metriken)
+  - job_name: "cadvisor"
+    static_configs:
+      - targets: ["cadvisor:8080"]
+
+  # Redis (wenn Redis Exporter hinzugefuegt wird)
+  # - job_name: "redis"
+  #   static_configs:
+  #     - targets: ["redis-exporter:9121"]
+
+  # Prometheus Self-Monitoring
+  - job_name: "prometheus"
+    static_configs:
+      - targets: ["localhost:9090"]
--- a/config/promtail/promtail.yml
+++ b/config/promtail/promtail.yml
@ -0,0 +1,51 @@
+# ============================================================
+# Promtail - Log-Collector Konfiguration
+# ============================================================
+# Sammelt Docker Container Logs und sendet sie an Loki.
+# ============================================================
+
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: http://loki:3100/loki/api/v1/push
+
+scrape_configs:
+  # Docker Container Logs
+  - job_name: docker
+    docker_sd_configs:
+      - host: unix:///var/run/docker.sock
+        refresh_interval: 5s
+        filters:
+          - name: label
+            values: ["com.docker.compose.project=insight"]
+    relabel_configs:
+      # Container-Name als Label
+      - source_labels: ['__meta_docker_container_name']
+        regex: '/(.*)'
+        target_label: container
+      # Compose-Service-Name als Label
+      - source_labels: ['__meta_docker_container_label_com_docker_compose_service']
+        target_label: service
+      # Log-Stream (stdout/stderr)
+      - source_labels: ['__meta_docker_container_log_stream']
+        target_label: stream
+
+    pipeline_stages:
+      # JSON-Logs parsen (NestJS)
+      - json:
+          expressions:
+            level: level
+            message: message
+            timestamp: timestamp
+            context: context
+      - labels:
+          level:
+          context:
+      - timestamp:
+          source: timestamp
+          format: RFC3339
--- a/config/tempo/tempo.yml
+++ b/config/tempo/tempo.yml
@ -0,0 +1,41 @@
+# ============================================================
+# Tempo - Distributed Tracing Konfiguration
+# ============================================================
+
+server:
+  http_listen_port: 3200
+
+distributor:
+  receivers:
+    otlp:
+      protocols:
+        grpc:
+          endpoint: "0.0.0.0:4317"
+        http:
+          endpoint: "0.0.0.0:4318"
+
+storage:
+  trace:
+    backend: local
+    local:
+      path: /var/tempo/traces
+    wal:
+      path: /var/tempo/wal
+
+metrics_generator:
+  registry:
+    external_labels:
+      source: tempo
+      cluster: insight-dev
+  storage:
+    path: /var/tempo/generator/wal
+    remote_write:
+      - url: http://prometheus:9090/api/v1/write
+        send_exemplars: true
+
+overrides:
+  defaults:
+    metrics_generator:
+      processors:
+        - service-graphs
+        - span-metrics
--- a/config/traefik/.gitkeep
+++ b/config/traefik/.gitkeep
--- a/config/traefik/dynamic/middlewares.yml
+++ b/config/traefik/dynamic/middlewares.yml
@ -0,0 +1,52 @@
+# ============================================================
+# Traefik - Globale Middlewares
+# ============================================================
+
+http:
+  middlewares:
+    # Security-Headers fuer alle Responses
+    security-headers:
+      headers:
+        browserXssFilter: true
+        contentTypeNosniff: true
+        frameDeny: true
+        stsIncludeSubdomains: true
+        stsPreload: true
+        stsSeconds: 31536000
+        customFrameOptionsValue: "SAMEORIGIN"
+        referrerPolicy: "strict-origin-when-cross-origin"
+        contentSecurityPolicy: >-
+          default-src 'self';
+          script-src 'self' 'unsafe-inline';
+          style-src 'self' 'unsafe-inline';
+          img-src 'self' data: blob:;
+          font-src 'self';
+          connect-src 'self' wss://insight-dev.xinion.lan;
+          frame-ancestors 'self';
+
+    # CORS fuer API
+    cors-api:
+      headers:
+        accessControlAllowMethods:
+          - GET
+          - POST
+          - PUT
+          - PATCH
+          - DELETE
+          - OPTIONS
+        accessControlAllowHeaders:
+          - Content-Type
+          - Authorization
+          - X-Tenant-ID
+          - X-Request-ID
+        accessControlAllowOriginList:
+          - "https://insight-dev.xinion.lan"
+        accessControlMaxAge: 86400
+        accessControlAllowCredentials: true
+        addVaryHeader: true
+
+    # Kompression
+    gzip-compress:
+      compress:
+        excludedContentTypes:
+          - text/event-stream
--- a/config/traefik/dynamic/tls.yml
+++ b/config/traefik/dynamic/tls.yml
@ -0,0 +1,24 @@
+# ============================================================
+# Traefik - Dynamische TLS-Konfiguration
+# ============================================================
+# Fuer die Alpha-Phase verwenden wir ein selbst-signiertes
+# Zertifikat. Spaeter wird step-ca als ACME-Provider genutzt.
+# ============================================================
+
+tls:
+  options:
+    default:
+      minVersion: VersionTLS12
+      cipherSuites:
+        - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
+        - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
+        - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+        - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
+      sniStrict: false
+
+  stores:
+    default:
+      defaultGeneratedCert:
+        resolver: default
+        domain:
+          main: "insight-dev.xinion.lan"
--- a/docker-compose.observability.yml
+++ b/docker-compose.observability.yml
@ -0,0 +1,185 @@
+# ============================================================
+# INSIGHT MVP - Docker Compose (Observability-Stack)
+# ============================================================
+# Ergaenzt docker-compose.yml um Monitoring, Logging & Tracing.
+#
+# Nutzung:
+#   docker compose -f docker-compose.yml -f docker-compose.observability.yml up -d
+#
+# Grafana (nur via SSH-Tunnel):
+#   ssh -L 3001:localhost:3001 -i .keys/deploy_ed25519 deploy@172.20.10.59
+#   Browser: http://localhost:3001
+# ============================================================
+
+networks:
+  insight-web:
+    external: true
+  insight-db:
+    external: true
+
+volumes:
+  prometheus-data:
+    name: insight-prometheus-data
+  grafana-data:
+    name: insight-grafana-data
+  loki-data:
+    name: insight-loki-data
+  tempo-data:
+    name: insight-tempo-data
+
+services:
+  # --------------------------------------------------------
+  # Prometheus - Metrics-Sammlung & -Speicherung
+  # --------------------------------------------------------
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: insight-prometheus
+    restart: unless-stopped
+    command:
+      - "--config.file=/etc/prometheus/prometheus.yml"
+      - "--storage.tsdb.path=/prometheus"
+      - "--storage.tsdb.retention.time=30d"
+      - "--web.enable-lifecycle"
+    volumes:
+      - ./config/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - prometheus-data:/prometheus
+    networks:
+      - insight-web
+    ports:
+      - "127.0.0.1:9090:9090"
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:9090/-/ready"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+
+  # --------------------------------------------------------
+  # Grafana - Dashboards & Alerting
+  # --------------------------------------------------------
+  grafana:
+    image: grafana/grafana:latest
+    container_name: insight-grafana
+    restart: unless-stopped
+    environment:
+      GF_SECURITY_ADMIN_USER: ${GRAFANA_ADMIN_USER:-admin}
+      GF_SECURITY_ADMIN_PASSWORD: ${GRAFANA_ADMIN_PASSWORD:?GRAFANA_ADMIN_PASSWORD muss gesetzt sein}
+      GF_SERVER_ROOT_URL: "http://localhost:3001"
+      GF_SERVER_HTTP_PORT: 3001
+      # Datenquellen per Provisioning
+      GF_PATHS_PROVISIONING: /etc/grafana/provisioning
+      # Keine anonyme Nutzung
+      GF_AUTH_ANONYMOUS_ENABLED: "false"
+      # Logging
+      GF_LOG_LEVEL: info
+    volumes:
+      - grafana-data:/var/lib/grafana
+      - ./config/grafana/provisioning:/etc/grafana/provisioning:ro
+    networks:
+      - insight-web
+    ports:
+      - "127.0.0.1:3001:3001"
+    depends_on:
+      prometheus:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD-SHELL", "curl -f http://localhost:3001/api/health || exit 1"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+
+  # --------------------------------------------------------
+  # Loki - Log-Aggregation
+  # --------------------------------------------------------
+  loki:
+    image: grafana/loki:latest
+    container_name: insight-loki
+    restart: unless-stopped
+    command: -config.file=/etc/loki/loki.yml
+    volumes:
+      - ./config/loki/loki.yml:/etc/loki/loki.yml:ro
+      - loki-data:/loki
+    networks:
+      - insight-web
+    ports:
+      - "127.0.0.1:3100:3100"
+    healthcheck:
+      test: ["CMD-SHELL", "wget --spider -q http://localhost:3100/ready || exit 1"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+
+  # --------------------------------------------------------
+  # Promtail - Log-Collector (liest Docker Logs)
+  # --------------------------------------------------------
+  promtail:
+    image: grafana/promtail:latest
+    container_name: insight-promtail
+    restart: unless-stopped
+    command: -config.file=/etc/promtail/promtail.yml
+    volumes:
+      - ./config/promtail/promtail.yml:/etc/promtail/promtail.yml:ro
+      - /var/log:/var/log:ro
+      - /var/lib/docker/containers:/var/lib/docker/containers:ro
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    networks:
+      - insight-web
+    depends_on:
+      - loki
+
+  # --------------------------------------------------------
+  # Tempo - Distributed Tracing
+  # --------------------------------------------------------
+  tempo:
+    image: grafana/tempo:latest
+    container_name: insight-tempo
+    restart: unless-stopped
+    command: -config.file=/etc/tempo/tempo.yml
+    volumes:
+      - ./config/tempo/tempo.yml:/etc/tempo/tempo.yml:ro
+      - tempo-data:/var/tempo
+    networks:
+      - insight-web
+    ports:
+      - "127.0.0.1:3200:3200"    # Tempo API
+      - "127.0.0.1:4317:4317"    # OTLP gRPC
+    healthcheck:
+      test: ["CMD-SHELL", "wget --spider -q http://localhost:3200/ready || exit 1"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+
+  # --------------------------------------------------------
+  # cAdvisor - Container-Metriken
+  # --------------------------------------------------------
+  cadvisor:
+    image: gcr.io/cadvisor/cadvisor:latest
+    container_name: insight-cadvisor
+    restart: unless-stopped
+    privileged: true
+    volumes:
+      - /:/rootfs:ro
+      - /var/run:/var/run:ro
+      - /sys:/sys:ro
+      - /var/lib/docker/:/var/lib/docker:ro
+      - /dev/disk/:/dev/disk:ro
+    networks:
+      - insight-web
+    ports:
+      - "127.0.0.1:8081:8080"
+
+  # --------------------------------------------------------
+  # PostgreSQL Exporter - DB-Metriken fuer Prometheus
+  # --------------------------------------------------------
+  postgres-exporter:
+    image: prometheuscommunity/postgres-exporter:latest
+    container_name: insight-postgres-exporter
+    restart: unless-stopped
+    environment:
+      DATA_SOURCE_NAME: "postgresql://${DB_USER:-insight}:${DB_PASSWORD}@postgres:5432/${DB_NAME:-platform_core}?sslmode=disable"
+    networks:
+      - insight-web
+      - insight-db
+    ports:
+      - "127.0.0.1:9187:9187"
+    depends_on:
+      - postgres
--- a/docker-compose.yml
+++ b/docker-compose.yml
@ -0,0 +1,307 @@
+# ============================================================
+# INSIGHT MVP - Docker Compose (Basis-Services)
+# ============================================================
+# Startet alle Kerndienste der INSIGHT-Plattform.
+# Observability-Stack separat: docker-compose.observability.yml
+#
+# Nutzung:
+#   docker compose up -d
+#   docker compose logs -f core
+#   docker compose ps
+# ============================================================
+
+networks:
+  insight-web:
+    driver: bridge
+    name: insight-web
+  insight-db:
+    driver: bridge
+    name: insight-db
+    internal: true
+  insight-cache:
+    driver: bridge
+    name: insight-cache
+    internal: true
+
+volumes:
+  postgres-data:
+    name: insight-postgres-data
+  redis-data:
+    name: insight-redis-data
+  step-ca-data:
+    name: insight-step-ca-data
+  traefik-certs:
+    name: insight-traefik-certs
+
+services:
+  # --------------------------------------------------------
+  # Traefik - API Gateway / Reverse Proxy
+  # --------------------------------------------------------
+  traefik:
+    image: traefik:3
+    container_name: insight-traefik
+    restart: unless-stopped
+    command:
+      # API & Dashboard
+      - "--api.dashboard=true"
+      - "--api.insecure=true"
+      # Entrypoints
+      - "--entrypoints.web.address=:80"
+      - "--entrypoints.websecure.address=:443"
+      # HTTP -> HTTPS Redirect
+      - "--entrypoints.web.http.redirections.entryPoint.to=websecure"
+      - "--entrypoints.web.http.redirections.entryPoint.scheme=https"
+      # Docker Provider
+      - "--providers.docker=true"
+      - "--providers.docker.exposedbydefault=false"
+      - "--providers.docker.network=insight-web"
+      # File Provider (fuer dynamische Konfiguration)
+      - "--providers.file.directory=/etc/traefik/dynamic"
+      - "--providers.file.watch=true"
+      # TLS (self-signed fuer Dev)
+      - "--entrypoints.websecure.http.tls=true"
+      # Logging
+      - "--log.level=INFO"
+      - "--accesslog=true"
+      - "--accesslog.format=json"
+      # Metrics fuer Prometheus
+      - "--metrics.prometheus=true"
+      - "--metrics.prometheus.entryPoint=metrics"
+      - "--entrypoints.metrics.address=:8082"
+    ports:
+      - "80:80"
+      - "443:443"
+      - "8080:8080"    # Dashboard (nur intern)
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+      - ./config/traefik/dynamic:/etc/traefik/dynamic:ro
+      - traefik-certs:/certs
+    networks:
+      - insight-web
+    labels:
+      - "traefik.enable=true"
+      # Dashboard Route (nur intern)
+      - "traefik.http.routers.dashboard.rule=Host(`traefik.insight-dev.xinion.lan`)"
+      - "traefik.http.routers.dashboard.service=api@internal"
+      - "traefik.http.routers.dashboard.entrypoints=websecure"
+    healthcheck:
+      test: ["CMD", "traefik", "healthcheck"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+
+  # --------------------------------------------------------
+  # PostgreSQL - Datenbank
+  # --------------------------------------------------------
+  postgres:
+    image: postgres:16-alpine
+    container_name: insight-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: ${DB_USER:-insight}
+      POSTGRES_PASSWORD: ${DB_PASSWORD:?DB_PASSWORD muss gesetzt sein}
+      POSTGRES_DB: ${DB_NAME:-platform_core}
+      # Performance-Tuning fuer 8GB RAM VM
+      POSTGRES_INITDB_ARGS: "--data-checksums"
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+      - ./config/postgres/init:/docker-entrypoint-initdb.d:ro
+    networks:
+      - insight-db
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${DB_USER:-insight} -d ${DB_NAME:-platform_core}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 30s
+    # Performance-Tuning via Command
+    command:
+      - "postgres"
+      - "-c"
+      - "shared_buffers=2GB"
+      - "-c"
+      - "effective_cache_size=6GB"
+      - "-c"
+      - "work_mem=16MB"
+      - "-c"
+      - "maintenance_work_mem=512MB"
+      - "-c"
+      - "max_connections=200"
+      - "-c"
+      - "log_min_duration_statement=500"
+      - "-c"
+      - "log_statement=ddl"
+
+  # --------------------------------------------------------
+  # PgBouncer - Connection Pooling
+  # --------------------------------------------------------
+  pgbouncer:
+    image: edoburu/pgbouncer:latest
+    container_name: insight-pgbouncer
+    restart: unless-stopped
+    environment:
+      DATABASE_URL: "postgres://${DB_USER:-insight}:${DB_PASSWORD}@postgres:5432/${DB_NAME:-platform_core}"
+      POOL_MODE: transaction
+      MAX_CLIENT_CONN: 500
+      DEFAULT_POOL_SIZE: 25
+      MIN_POOL_SIZE: 5
+      RESERVE_POOL_SIZE: 5
+      SERVER_RESET_QUERY: "DISCARD ALL"
+      SERVER_CHECK_DELAY: 30
+      SERVER_CHECK_QUERY: "SELECT 1"
+      AUTH_TYPE: scram-sha-256
+    networks:
+      - insight-db
+    depends_on:
+      postgres:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -h 127.0.0.1 -p 6432"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
+
+  # --------------------------------------------------------
+  # Redis - Cache, Sessions, Event Bus
+  # --------------------------------------------------------
+  redis:
+    image: redis:7-alpine
+    container_name: insight-redis
+    restart: unless-stopped
+    command: >
+      redis-server
+      --requirepass ${REDIS_PASSWORD:-}
+      --maxmemory 512mb
+      --maxmemory-policy allkeys-lru
+      --appendonly yes
+      --appendfsync everysec
+      --save 60 1000
+      --save 300 100
+    volumes:
+      - redis-data:/data
+    networks:
+      - insight-cache
+    healthcheck:
+      test: ["CMD", "redis-cli", "-a", "${REDIS_PASSWORD:-}", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
+
+  # --------------------------------------------------------
+  # step-ca - Interne Certificate Authority (mTLS)
+  # --------------------------------------------------------
+  step-ca:
+    image: smallstep/step-ca:latest
+    container_name: insight-step-ca
+    restart: unless-stopped
+    environment:
+      DOCKER_STEPCA_INIT_NAME: "INSIGHT Internal CA"
+      DOCKER_STEPCA_INIT_DNS_NAMES: "step-ca,localhost"
+      DOCKER_STEPCA_INIT_REMOTE_MANAGEMENT: "true"
+      DOCKER_STEPCA_INIT_ACME: "true"
+    volumes:
+      - step-ca-data:/home/step
+    networks:
+      - insight-web
+      - insight-db
+      - insight-cache
+    healthcheck:
+      test: ["CMD", "step", "ca", "health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+
+  # --------------------------------------------------------
+  # Core-Service - NestJS Backend
+  # --------------------------------------------------------
+  core:
+    build:
+      context: ./packages/core-service
+      dockerfile: Dockerfile
+      target: development
+    container_name: insight-core
+    restart: unless-stopped
+    environment:
+      NODE_ENV: ${NODE_ENV:-development}
+      APP_PORT: ${APP_PORT:-3000}
+      APP_URL: ${APP_URL:-https://insight-dev.xinion.lan}
+      FRONTEND_URL: ${FRONTEND_URL:-https://insight-dev.xinion.lan}
+      LOG_LEVEL: ${LOG_LEVEL:-info}
+      # Database (via PgBouncer)
+      DATABASE_URL: "postgresql://${DB_USER:-insight}:${DB_PASSWORD}@pgbouncer:6432/${DB_NAME:-platform_core}"
+      # Database (direkt fuer Migrations)
+      DATABASE_URL_DIRECT: "postgresql://${DB_USER:-insight}:${DB_PASSWORD}@postgres:5432/${DB_NAME:-platform_core}"
+      # Redis
+      REDIS_HOST: redis
+      REDIS_PORT: 6379
+      REDIS_PASSWORD: ${REDIS_PASSWORD:-}
+      # JWT
+      JWT_PRIVATE_KEY_PATH: ${JWT_PRIVATE_KEY_PATH:-/app/keys/jwt-private.pem}
+      JWT_PUBLIC_KEY_PATH: ${JWT_PUBLIC_KEY_PATH:-/app/keys/jwt-public.pem}
+      JWT_ACCESS_TOKEN_EXPIRY: ${JWT_ACCESS_TOKEN_EXPIRY:-15m}
+      JWT_REFRESH_TOKEN_EXPIRY: ${JWT_REFRESH_TOKEN_EXPIRY:-7d}
+      JWT_ISSUER: ${JWT_ISSUER:-insight-platform}
+      # Bcrypt
+      BCRYPT_COST: ${BCRYPT_COST:-12}
+      # CORS
+      CORS_ORIGINS: ${CORS_ORIGINS:-https://insight-dev.xinion.lan}
+      # Rate Limiting
+      THROTTLE_TTL: ${THROTTLE_TTL:-60000}
+      THROTTLE_LIMIT: ${THROTTLE_LIMIT:-200}
+    networks:
+      - insight-web
+      - insight-db
+      - insight-cache
+    depends_on:
+      pgbouncer:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    labels:
+      - "traefik.enable=true"
+      # API Routing
+      - "traefik.http.routers.core-api.rule=Host(`insight-dev.xinion.lan`) && PathPrefix(`/api`)"
+      - "traefik.http.routers.core-api.entrypoints=websecure"
+      - "traefik.http.routers.core-api.service=core-api"
+      - "traefik.http.services.core-api.loadbalancer.server.port=3000"
+      # Health-Endpunkt (ohne Auth)
+      - "traefik.http.routers.core-health.rule=Host(`insight-dev.xinion.lan`) && Path(`/health`)"
+      - "traefik.http.routers.core-health.entrypoints=websecure"
+      - "traefik.http.routers.core-health.service=core-api"
+      # Rate Limiting Middleware
+      - "traefik.http.middlewares.api-ratelimit.ratelimit.average=100"
+      - "traefik.http.middlewares.api-ratelimit.ratelimit.burst=50"
+      - "traefik.http.routers.core-api.middlewares=api-ratelimit"
+    healthcheck:
+      test: ["CMD-SHELL", "curl -f http://localhost:3000/health || exit 1"]
+      interval: 15s
+      timeout: 5s
+      retries: 3
+      start_period: 30s
+
+  # --------------------------------------------------------
+  # Frontend - React App (via Nginx)
+  # --------------------------------------------------------
+  frontend:
+    build:
+      context: ./packages/frontend
+      dockerfile: Dockerfile
+      target: development
+    container_name: insight-frontend
+    restart: unless-stopped
+    networks:
+      - insight-web
+    labels:
+      - "traefik.enable=true"
+      # Frontend Routing (Catch-All nach API)
+      - "traefik.http.routers.frontend.rule=Host(`insight-dev.xinion.lan`)"
+      - "traefik.http.routers.frontend.entrypoints=websecure"
+      - "traefik.http.routers.frontend.service=frontend"
+      - "traefik.http.routers.frontend.priority=1"
+      - "traefik.http.services.frontend.loadbalancer.server.port=8080"
+    healthcheck:
+      test: ["CMD-SHELL", "curl -f http://localhost:8080/ || exit 1"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
--- a/packages/core-service/.dockerignore
+++ b/packages/core-service/.dockerignore
@ -0,0 +1,7 @@
+node_modules
+dist
+coverage
+.env
+*.md
+.git
+.gitignore
--- a/packages/core-service/Dockerfile
+++ b/packages/core-service/Dockerfile
@ -0,0 +1,56 @@
+# ============================================================
+# INSIGHT Core-Service - Multi-Stage Dockerfile
+# ============================================================
+
+# --- Base Stage ---
+FROM node:20-alpine AS base
+WORKDIR /app
+RUN apk add --no-cache openssl
+
+# --- Dependencies Stage ---
+FROM base AS deps
+COPY package.json package-lock.json* ./
+RUN npm ci --ignore-scripts
+# Prisma Generate braucht die Schema-Dateien
+COPY prisma ./prisma
+RUN npx prisma generate --schema=prisma/core.schema.prisma
+
+# --- Development Stage ---
+FROM base AS development
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npx prisma generate --schema=prisma/core.schema.prisma
+EXPOSE 3000
+CMD ["npm", "run", "start:dev"]
+
+# --- Build Stage ---
+FROM base AS build
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+# --- Production Stage ---
+FROM base AS production
+WORKDIR /app
+ENV NODE_ENV=production
+
+# Nur Produktions-Dependencies
+COPY package.json package-lock.json* ./
+RUN npm ci --omit=dev --ignore-scripts
+
+# Prisma Client generieren
+COPY prisma ./prisma
+RUN npx prisma generate --schema=prisma/core.schema.prisma
+
+# Kompilierter Code
+COPY --from=build /app/dist ./dist
+
+# Non-root User
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nestjs -u 1001 -G nodejs
+USER nestjs
+
+EXPOSE 3000
+CMD ["node", "dist/main"]
--- a/packages/core-service/nest-cli.json
+++ b/packages/core-service/nest-cli.json
@ -0,0 +1,8 @@
+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "deleteOutDir": true
+  }
+}
--- a/packages/core-service/package.json
+++ b/packages/core-service/package.json
@ -0,0 +1,93 @@
+{
+  "name": "@insight/core-service",
+  "version": "0.1.0",
+  "description": "INSIGHT MVP - Core Service (NestJS Backend)",
+  "private": true,
+  "license": "UNLICENSED",
+  "scripts": {
+    "build": "nest build",
+    "start": "nest start",
+    "start:dev": "nest start --watch",
+    "start:debug": "nest start --debug --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint \"{src,test}/**/*.ts\" --fix",
+    "lint:check": "eslint \"{src,test}/**/*.ts\"",
+    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
+    "format:check": "prettier --check \"src/**/*.ts\" \"test/**/*.ts\"",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:cov": "jest --coverage",
+    "test:e2e": "jest --config ./test/jest-e2e.json",
+    "typecheck": "tsc --noEmit",
+    "prisma:generate": "prisma generate --schema=prisma/core.schema.prisma",
+    "prisma:migrate": "prisma migrate dev --schema=prisma/core.schema.prisma",
+    "prisma:migrate:deploy": "prisma migrate deploy --schema=prisma/core.schema.prisma",
+    "prisma:studio": "prisma studio --schema=prisma/core.schema.prisma"
+  },
+  "dependencies": {
+    "@nestjs/common": "^10.4.0",
+    "@nestjs/config": "^3.2.0",
+    "@nestjs/core": "^10.4.0",
+    "@nestjs/jwt": "^10.2.0",
+    "@nestjs/passport": "^10.0.3",
+    "@nestjs/platform-express": "^10.4.0",
+    "@nestjs/schedule": "^4.1.0",
+    "@nestjs/swagger": "^7.4.0",
+    "@nestjs/throttler": "^6.2.0",
+    "@prisma/client": "^6.4.0",
+    "bcrypt": "^5.1.1",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.1",
+    "cookie-parser": "^1.4.7",
+    "helmet": "^8.0.0",
+    "ioredis": "^5.4.1",
+    "otplib": "^12.0.1",
+    "passport": "^0.7.0",
+    "passport-jwt": "^4.0.1",
+    "qrcode": "^1.5.4",
+    "reflect-metadata": "^0.2.2",
+    "rxjs": "^7.8.1",
+    "uuid": "^10.0.0"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "^10.4.0",
+    "@nestjs/schematics": "^10.1.0",
+    "@nestjs/testing": "^10.4.0",
+    "@types/bcrypt": "^5.0.2",
+    "@types/cookie-parser": "^1.4.7",
+    "@types/express": "^5.0.0",
+    "@types/jest": "^29.5.12",
+    "@types/node": "^22.0.0",
+    "@types/passport-jwt": "^4.0.1",
+    "@types/qrcode": "^1.5.5",
+    "@types/uuid": "^10.0.0",
+    "@typescript-eslint/eslint-plugin": "^8.0.0",
+    "@typescript-eslint/parser": "^8.0.0",
+    "eslint": "^9.0.0",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-prettier": "^5.2.0",
+    "jest": "^29.7.0",
+    "prettier": "^3.3.0",
+    "prisma": "^6.4.0",
+    "source-map-support": "^0.5.21",
+    "ts-jest": "^29.2.0",
+    "ts-loader": "^9.5.0",
+    "ts-node": "^10.9.2",
+    "tsconfig-paths": "^4.2.0",
+    "typescript": "^5.6.0"
+  },
+  "jest": {
+    "moduleFileExtensions": ["js", "json", "ts"],
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": ["**/*.(t|j)s"],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node",
+    "moduleNameMapper": {
+      "^@/(.*)$": "<rootDir>/$1"
+    }
+  }
+}
--- a/packages/core-service/prisma/.gitkeep
+++ b/packages/core-service/prisma/.gitkeep
--- a/packages/core-service/prisma/core.schema.prisma
+++ b/packages/core-service/prisma/core.schema.prisma
@ -0,0 +1,181 @@
+// ============================================================
+// INSIGHT MVP - Core Schema (platform_core Datenbank)
+// ============================================================
+// Zentrale Plattform-Tabellen: Users, Tenants, Auth, Modules
+// Kein raw SQL - nur Prisma!
+// ============================================================
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider  = "postgresql"
+  url       = env("DATABASE_URL")
+  directUrl = env("DATABASE_URL_DIRECT")
+}
+
+// --------------------------------------------------------
+// User - Plattform-Benutzer
+// --------------------------------------------------------
+model User {
+  id        String   @id @default(uuid()) @db.Uuid
+  email     String   @unique @db.VarChar(255)
+  firstName String   @map("first_name") @db.VarChar(100)
+  lastName  String   @map("last_name") @db.VarChar(100)
+  role      String   @default("USER") @db.VarChar(50) // PLATFORM_ADMIN, TENANT_ADMIN, USER
+  isActive  Boolean  @default(true) @map("is_active")
+
+  // 2FA
+  twoFactorEnabled Boolean @default(false) @map("two_factor_enabled")
+
+  // Login-Tracking
+  lastLogin           DateTime? @map("last_login")
+  failedLoginAttempts  Int       @default(0) @map("failed_login_attempts")
+  lastFailedLogin      DateTime? @map("last_failed_login")
+
+  // Timestamps
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  // Relationen
+  authProvider      AuthProvider[]
+  tenantMemberships TenantMembership[]
+  auditLogs         AuditLog[]
+
+  @@map("users")
+}
+
+// --------------------------------------------------------
+// AuthProvider - Authentifizierungs-Provider pro User
+// --------------------------------------------------------
+// Unterstuetzt mehrere Auth-Methoden pro User:
+// LOCAL (Passwort), MS_SSO (spaeter), M2M (Machine-to-Machine)
+model AuthProvider {
+  id           String  @id @default(uuid()) @db.Uuid
+  userId       String  @map("user_id") @db.Uuid
+  provider     String  @db.VarChar(50) // LOCAL, MS_SSO, M2M
+  providerId   String? @map("provider_id") @db.VarChar(255) // Externe ID (z.B. MS Object ID)
+  passwordHash String? @map("password_hash") @db.VarChar(255)
+  totpSecret   String? @map("totp_secret") @db.VarChar(255) // Verschluesselt
+
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  // Relationen
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, provider])
+  @@map("auth_providers")
+}
+
+// --------------------------------------------------------
+// Tenant - Mandant
+// --------------------------------------------------------
+model Tenant {
+  id       String  @id @default(uuid()) @db.Uuid
+  name     String  @db.VarChar(200)
+  slug     String  @unique @db.VarChar(50) // URL-freundlich, fuer DB-Name
+  isActive Boolean @default(true) @map("is_active")
+
+  // Mandant-Einstellungen (JSON)
+  settings Json @default("{}")
+
+  // Timestamps
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  // Relationen
+  members TenantMembership[]
+  modules TenantModule[]
+
+  @@map("tenants")
+}
+
+// --------------------------------------------------------
+// TenantMembership - User-Tenant-Zuordnung (M:N)
+// --------------------------------------------------------
+model TenantMembership {
+  id         String  @id @default(uuid()) @db.Uuid
+  userId     String  @map("user_id") @db.Uuid
+  tenantId   String  @map("tenant_id") @db.Uuid
+  tenantRole String  @default("MEMBER") @map("tenant_role") @db.VarChar(50) // ADMIN, MEMBER, VIEWER
+  isActive   Boolean @default(true) @map("is_active")
+
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  // Relationen
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
+  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, tenantId])
+  @@map("tenant_memberships")
+}
+
+// --------------------------------------------------------
+// Module - Verfuegbare Plattform-Module
+// --------------------------------------------------------
+model Module {
+  id          String  @id @default(uuid()) @db.Uuid
+  key         String  @unique @db.VarChar(50) // z.B. "crm", "project", "docs"
+  name        String  @db.VarChar(100)
+  description String? @db.Text
+  version     String  @default("1.0.0") @db.VarChar(20)
+  isActive    Boolean @default(true) @map("is_active")
+
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  // Relationen
+  tenantModules TenantModule[]
+
+  @@map("modules")
+}
+
+// --------------------------------------------------------
+// TenantModule - Welcher Tenant welche Module nutzt
+// --------------------------------------------------------
+model TenantModule {
+  id       String  @id @default(uuid()) @db.Uuid
+  tenantId String  @map("tenant_id") @db.Uuid
+  moduleId String  @map("module_id") @db.Uuid
+  isActive Boolean @default(true) @map("is_active")
+
+  // Modul-spezifische Konfiguration pro Tenant
+  config Json @default("{}")
+
+  activatedAt DateTime @default(now()) @map("activated_at")
+
+  // Relationen
+  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)
+  module Module @relation(fields: [moduleId], references: [id], onDelete: Cascade)
+
+  @@unique([tenantId, moduleId])
+  @@map("tenant_modules")
+}
+
+// --------------------------------------------------------
+// AuditLog - Plattform-weites Audit-Log
+// --------------------------------------------------------
+model AuditLog {
+  id        String   @id @default(uuid()) @db.Uuid
+  userId    String?  @map("user_id") @db.Uuid
+  action    String   @db.VarChar(100) // z.B. "user.login", "tenant.create"
+  entity    String   @db.VarChar(100) // z.B. "User", "Tenant"
+  entityId  String?  @map("entity_id") @db.VarChar(255)
+  details   Json?    // Zusaetzliche Informationen
+  ipAddress String?  @map("ip_address") @db.VarChar(45)
+  userAgent String?  @map("user_agent") @db.Text
+
+  createdAt DateTime @default(now()) @map("created_at")
+
+  // Relationen
+  user User? @relation(fields: [userId], references: [id], onDelete: SetNull)
+
+  @@index([userId])
+  @@index([action])
+  @@index([entity, entityId])
+  @@index([createdAt])
+  @@map("audit_logs")
+}
--- a/packages/core-service/prisma/tenant.schema.prisma
+++ b/packages/core-service/prisma/tenant.schema.prisma
@ -0,0 +1,111 @@
+// ============================================================
+// INSIGHT MVP - Tenant Schema (tenant_{slug} Datenbanken)
+// ============================================================
+// Jeder Mandant hat eine eigene Datenbank mit diesen Tabellen.
+// Schema wird per Prisma Migrate auf neue Tenant-DBs angewandt.
+//
+// HINWEIS: Dieses Schema wird derzeit als Referenz gefuehrt.
+// Die tatsaechliche Migration auf Tenant-DBs erfolgt
+// in Sprint 2+ wenn das CRM-Modul implementiert wird.
+// ============================================================
+
+generator client {
+  provider = "prisma-client-js"
+  output   = "../node_modules/.prisma/tenant-client"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("TENANT_DATABASE_URL")
+}
+
+// --------------------------------------------------------
+// Contact - CRM-Kontakte (Personen & Organisationen)
+// --------------------------------------------------------
+model Contact {
+  id        String      @id @default(uuid()) @db.Uuid
+  type      ContactType @default(PERSON)
+
+  // Person
+  firstName String? @map("first_name") @db.VarChar(100)
+  lastName  String? @map("last_name") @db.VarChar(100)
+
+  // Organisation
+  companyName String? @map("company_name") @db.VarChar(200)
+
+  // Kontaktdaten
+  email     String?  @db.VarChar(255)
+  phone     String?  @db.VarChar(50)
+  mobile    String?  @db.VarChar(50)
+  website   String?  @db.VarChar(500)
+
+  // Adresse
+  street    String?  @db.VarChar(200)
+  zip       String?  @db.VarChar(20)
+  city      String?  @db.VarChar(100)
+  state     String?  @db.VarChar(100)
+  country   String?  @default("DE") @db.VarChar(2)
+
+  // Zusaetzlich
+  notes     String?  @db.Text
+  tags      String[] @default([])
+
+  isActive  Boolean  @default(true) @map("is_active")
+
+  // Wer hat erstellt/bearbeitet (User-IDs aus platform_core)
+  createdBy String   @map("created_by") @db.Uuid
+  updatedBy String?  @map("updated_by") @db.Uuid
+
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  // Relationen
+  activities Activity[]
+
+  @@index([email])
+  @@index([companyName])
+  @@index([lastName, firstName])
+  @@map("contacts")
+}
+
+enum ContactType {
+  PERSON
+  ORGANIZATION
+}
+
+// --------------------------------------------------------
+// Activity - CRM-Aktivitaeten (Notizen, Anrufe, E-Mails)
+// --------------------------------------------------------
+model Activity {
+  id          String       @id @default(uuid()) @db.Uuid
+  contactId   String       @map("contact_id") @db.Uuid
+  type        ActivityType
+  subject     String       @db.VarChar(500)
+  description String?      @db.Text
+
+  // Terminierung
+  scheduledAt DateTime?    @map("scheduled_at")
+  completedAt DateTime?    @map("completed_at")
+
+  // Wer hat erstellt (User-ID aus platform_core)
+  createdBy   String       @map("created_by") @db.Uuid
+
+  createdAt   DateTime     @default(now()) @map("created_at")
+  updatedAt   DateTime     @updatedAt @map("updated_at")
+
+  // Relationen
+  contact Contact @relation(fields: [contactId], references: [id], onDelete: Cascade)
+
+  @@index([contactId])
+  @@index([type])
+  @@index([scheduledAt])
+  @@map("activities")
+}
+
+enum ActivityType {
+  NOTE
+  CALL
+  EMAIL
+  MEETING
+  TASK
+}
--- a/packages/core-service/src/app.module.ts
+++ b/packages/core-service/src/app.module.ts
@ -0,0 +1,57 @@
+import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { APP_GUARD } from '@nestjs/core';
+import { ThrottlerModule, ThrottlerGuard } from '@nestjs/throttler';
+import { ScheduleModule } from '@nestjs/schedule';
+import { HealthModule } from './health/health.module';
+import { PrismaModule } from './prisma/prisma.module';
+import { RedisModule } from './redis/redis.module';
+import { AuthModule } from './core/auth/auth.module';
+import { UsersModule } from './core/users/users.module';
+import { TenantsModule } from './core/tenants/tenants.module';
+import { JwtAuthGuard } from './common/guards/jwt-auth.guard';
+import { validateConfig } from './config/env.validation';
+
+@Module({
+  imports: [
+    // Konfiguration (.env)
+    ConfigModule.forRoot({
+      isGlobal: true,
+      validate: validateConfig,
+    }),
+
+    // Rate Limiting
+    ThrottlerModule.forRoot([
+      {
+        ttl: parseInt(process.env.THROTTLE_TTL ?? '60000', 10),
+        limit: parseInt(process.env.THROTTLE_LIMIT ?? '200', 10),
+      },
+    ]),
+
+    // Cron-Jobs
+    ScheduleModule.forRoot(),
+
+    // Infrastruktur-Module
+    PrismaModule,
+    RedisModule,
+
+    // Feature-Module
+    HealthModule,
+    AuthModule,
+    UsersModule,
+    TenantsModule,
+  ],
+  providers: [
+    // Global Guards: Alle Routen sind standardmaessig geschuetzt
+    // Oeffentliche Routen muessen mit @Public() dekoriert werden
+    {
+      provide: APP_GUARD,
+      useClass: JwtAuthGuard,
+    },
+    {
+      provide: APP_GUARD,
+      useClass: ThrottlerGuard,
+    },
+  ],
+})
+export class AppModule {}
--- a/packages/core-service/src/common/decorators/.gitkeep
+++ b/packages/core-service/src/common/decorators/.gitkeep
--- a/packages/core-service/src/common/decorators/current-user.decorator.ts
+++ b/packages/core-service/src/common/decorators/current-user.decorator.ts
@ -0,0 +1,35 @@
+import { createParamDecorator, ExecutionContext } from '@nestjs/common';
+import { Request } from 'express';
+
+export interface JwtPayload {
+  sub: string; // User-ID
+  email: string;
+  role: string;
+  tenantId?: string;
+  tenantSlug?: string;
+  jti: string; // Token-ID fuer Revocation
+  iat: number;
+  exp: number;
+}
+
+/**
+ * @CurrentUser() - Extrahiert den authentifizierten User aus dem Request.
+ *
+ * Beispiel:
+ *   @Get('profile')
+ *   getProfile(@CurrentUser() user: JwtPayload) {
+ *     return user;
+ *   }
+ *
+ *   @Get('profile/id')
+ *   getProfileId(@CurrentUser('sub') userId: string) {
+ *     return userId;
+ *   }
+ */
+export const CurrentUser = createParamDecorator(
+  (data: keyof JwtPayload | undefined, ctx: ExecutionContext) => {
+    const request = ctx.switchToHttp().getRequest<Request>();
+    const user = request.user as JwtPayload;
+    return data ? user?.[data] : user;
+  },
+);
--- a/packages/core-service/src/common/decorators/index.ts
+++ b/packages/core-service/src/common/decorators/index.ts
@ -0,0 +1,3 @@
+export { Public, IS_PUBLIC_KEY } from './public.decorator';
+export { Roles, ROLES_KEY } from './roles.decorator';
+export { CurrentUser, type JwtPayload } from './current-user.decorator';
--- a/packages/core-service/src/common/decorators/public.decorator.ts
+++ b/packages/core-service/src/common/decorators/public.decorator.ts
@ -0,0 +1,16 @@
+import { SetMetadata } from '@nestjs/common';
+
+export const IS_PUBLIC_KEY = 'isPublic';
+
+/**
+ * @Public() - Markiert eine Route als oeffentlich zugaenglich.
+ *
+ * Standardmaessig sind ALLE Routen durch den JwtAuthGuard geschuetzt.
+ * Nur explizit mit @Public() dekorierte Routen sind ohne Token erreichbar.
+ *
+ * Beispiel:
+ *   @Get('health')
+ *   @Public()
+ *   healthCheck() { ... }
+ */
+export const Public = () => SetMetadata(IS_PUBLIC_KEY, true);
--- a/packages/core-service/src/common/decorators/roles.decorator.ts
+++ b/packages/core-service/src/common/decorators/roles.decorator.ts
@ -0,0 +1,13 @@
+import { SetMetadata } from '@nestjs/common';
+
+export const ROLES_KEY = 'roles';
+
+/**
+ * @Roles() - Beschraenkt den Zugriff auf bestimmte Plattform-Rollen.
+ *
+ * Beispiel:
+ *   @Roles('PLATFORM_ADMIN', 'TENANT_ADMIN')
+ *   @Get('admin/users')
+ *   listUsers() { ... }
+ */
+export const Roles = (...roles: string[]) => SetMetadata(ROLES_KEY, roles);
--- a/packages/core-service/src/common/filters/.gitkeep
+++ b/packages/core-service/src/common/filters/.gitkeep
--- a/packages/core-service/src/common/filters/global-exception.filter.ts
+++ b/packages/core-service/src/common/filters/global-exception.filter.ts
@ -0,0 +1,88 @@
+import {
+  ExceptionFilter,
+  Catch,
+  ArgumentsHost,
+  HttpException,
+  HttpStatus,
+  Logger,
+} from '@nestjs/common';
+import { Request, Response } from 'express';
+
+interface ErrorResponse {
+  statusCode: number;
+  message: string;
+  error: string;
+  timestamp: string;
+  path: string;
+  requestId?: string;
+}
+
+/**
+ * GlobalExceptionFilter - Faengt alle unbehandelten Exceptions.
+ *
+ * - Strukturierte Fehlerantworten im JSON-Format
+ * - Logging aller Fehler
+ * - Keine internen Details in Produktions-Fehlern
+ */
+@Catch()
+export class GlobalExceptionFilter implements ExceptionFilter {
+  private readonly logger = new Logger(GlobalExceptionFilter.name);
+
+  catch(exception: unknown, host: ArgumentsHost): void {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+
+    let statusCode: number;
+    let message: string;
+    let error: string;
+
+    if (exception instanceof HttpException) {
+      statusCode = exception.getStatus();
+      const exceptionResponse = exception.getResponse();
+
+      if (typeof exceptionResponse === 'string') {
+        message = exceptionResponse;
+        error = exception.name;
+      } else if (typeof exceptionResponse === 'object') {
+        const resp = exceptionResponse as Record<string, unknown>;
+        message = Array.isArray(resp.message)
+          ? resp.message.join(', ')
+          : (resp.message as string) || exception.message;
+        error = (resp.error as string) || exception.name;
+      } else {
+        message = exception.message;
+        error = exception.name;
+      }
+    } else if (exception instanceof Error) {
+      statusCode = HttpStatus.INTERNAL_SERVER_ERROR;
+      message =
+        process.env.NODE_ENV === 'production'
+          ? 'Interner Serverfehler'
+          : exception.message;
+      error = 'InternalServerError';
+
+      // Stack-Trace loggen fuer unerwartete Fehler
+      this.logger.error(
+        `Unbehandelter Fehler: ${exception.message}`,
+        exception.stack,
+      );
+    } else {
+      statusCode = HttpStatus.INTERNAL_SERVER_ERROR;
+      message = 'Unbekannter Fehler';
+      error = 'UnknownError';
+      this.logger.error('Unbekannter Fehler:', exception);
+    }
+
+    const errorResponse: ErrorResponse = {
+      statusCode,
+      message,
+      error,
+      timestamp: new Date().toISOString(),
+      path: request.url,
+      requestId: request.headers['x-request-id'] as string | undefined,
+    };
+
+    response.status(statusCode).json(errorResponse);
+  }
+}
--- a/packages/core-service/src/common/guards/.gitkeep
+++ b/packages/core-service/src/common/guards/.gitkeep
--- a/packages/core-service/src/common/guards/jwt-auth.guard.ts
+++ b/packages/core-service/src/common/guards/jwt-auth.guard.ts
@ -0,0 +1,65 @@
+import {
+  Injectable,
+  ExecutionContext,
+  UnauthorizedException,
+} from '@nestjs/common';
+import { Reflector } from '@nestjs/core';
+import { AuthGuard } from '@nestjs/passport';
+import { IS_PUBLIC_KEY } from '../decorators/public.decorator';
+import { RedisService } from '../../redis/redis.service';
+import { JwtPayload } from '../decorators/current-user.decorator';
+
+/**
+ * JwtAuthGuard - Globaler Guard fuer JWT-Authentifizierung.
+ *
+ * - Standardmaessig aktiv auf ALLEN Routen
+ * - @Public() dekorierte Routen werden uebersprungen
+ * - Prueft zusaetzlich ob der Token revoked wurde (Redis Blocklist)
+ */
+@Injectable()
+export class JwtAuthGuard extends AuthGuard('jwt') {
+  constructor(
+    private readonly reflector: Reflector,
+    private readonly redis: RedisService,
+  ) {
+    super();
+  }
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    // @Public() Routen ueberspringen
+    const isPublic = this.reflector.getAllAndOverride<boolean>(IS_PUBLIC_KEY, [
+      context.getHandler(),
+      context.getClass(),
+    ]);
+
+    if (isPublic) {
+      return true;
+    }
+
+    // JWT validieren (Passport Strategy)
+    const canActivate = await super.canActivate(context);
+    if (!canActivate) {
+      return false;
+    }
+
+    // Token-Revocation pruefen (Redis Blocklist)
+    const request = context.switchToHttp().getRequest();
+    const user = request.user as JwtPayload;
+
+    if (user?.jti) {
+      const isBlocked = await this.redis.isTokenBlocked(user.jti);
+      if (isBlocked) {
+        throw new UnauthorizedException('Token wurde widerrufen');
+      }
+    }
+
+    return true;
+  }
+
+  handleRequest<T>(err: Error | null, user: T, info: Error | undefined): T {
+    if (err || !user) {
+      throw err || new UnauthorizedException('Zugriff verweigert');
+    }
+    return user;
+  }
+}
--- a/packages/core-service/src/common/guards/roles.guard.ts
+++ b/packages/core-service/src/common/guards/roles.guard.ts
@ -0,0 +1,37 @@
+import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
+import { Reflector } from '@nestjs/core';
+import { ROLES_KEY } from '../decorators/roles.decorator';
+import { JwtPayload } from '../decorators/current-user.decorator';
+
+/**
+ * RolesGuard - Prueft ob der User die erforderliche Rolle hat.
+ *
+ * Wird zusammen mit @Roles() verwendet:
+ *   @Roles('PLATFORM_ADMIN')
+ *   @UseGuards(RolesGuard)
+ *   @Get('admin/dashboard')
+ */
+@Injectable()
+export class RolesGuard implements CanActivate {
+  constructor(private readonly reflector: Reflector) {}
+
+  canActivate(context: ExecutionContext): boolean {
+    const requiredRoles = this.reflector.getAllAndOverride<string[]>(
+      ROLES_KEY,
+      [context.getHandler(), context.getClass()],
+    );
+
+    if (!requiredRoles || requiredRoles.length === 0) {
+      return true;
+    }
+
+    const request = context.switchToHttp().getRequest();
+    const user = request.user as JwtPayload;
+
+    if (!user?.role) {
+      return false;
+    }
+
+    return requiredRoles.includes(user.role);
+  }
+}
--- a/packages/core-service/src/common/interceptors/.gitkeep
+++ b/packages/core-service/src/common/interceptors/.gitkeep
--- a/packages/core-service/src/config/.gitkeep
+++ b/packages/core-service/src/config/.gitkeep
--- a/packages/core-service/src/config/env.validation.ts
+++ b/packages/core-service/src/config/env.validation.ts
@ -0,0 +1,98 @@
+import { plainToInstance } from 'class-transformer';
+import {
+  IsEnum,
+  IsNotEmpty,
+  IsNumber,
+  IsOptional,
+  IsString,
+  Min,
+  Max,
+  validateSync,
+} from 'class-validator';
+
+enum Environment {
+  Development = 'development',
+  Production = 'production',
+  Test = 'test',
+}
+
+class EnvironmentVariables {
+  @IsEnum(Environment)
+  NODE_ENV: Environment = Environment.Development;
+
+  @IsNumber()
+  @Min(1)
+  @Max(65535)
+  APP_PORT = 3000;
+
+  @IsString()
+  @IsNotEmpty()
+  APP_URL = 'https://insight-dev.xinion.lan';
+
+  // Datenbank
+  @IsString()
+  @IsNotEmpty()
+  DATABASE_URL!: string;
+
+  @IsString()
+  @IsOptional()
+  DATABASE_URL_DIRECT?: string;
+
+  // Redis
+  @IsString()
+  REDIS_HOST = 'redis';
+
+  @IsNumber()
+  REDIS_PORT = 6379;
+
+  @IsString()
+  @IsOptional()
+  REDIS_PASSWORD?: string;
+
+  // JWT
+  @IsString()
+  @IsNotEmpty()
+  JWT_PRIVATE_KEY_PATH = '/app/keys/jwt-private.pem';
+
+  @IsString()
+  @IsNotEmpty()
+  JWT_PUBLIC_KEY_PATH = '/app/keys/jwt-public.pem';
+
+  @IsString()
+  JWT_ACCESS_TOKEN_EXPIRY = '15m';
+
+  @IsString()
+  JWT_REFRESH_TOKEN_EXPIRY = '7d';
+
+  @IsString()
+  JWT_ISSUER = 'insight-platform';
+
+  // Bcrypt
+  @IsNumber()
+  @Min(10)
+  @Max(14)
+  BCRYPT_COST = 12;
+
+  // Rate Limiting
+  @IsNumber()
+  THROTTLE_TTL = 60000;
+
+  @IsNumber()
+  THROTTLE_LIMIT = 200;
+}
+
+export function validateConfig(
+  config: Record<string, unknown>,
+): EnvironmentVariables {
+  const validatedConfig = plainToInstance(EnvironmentVariables, config, {
+    enableImplicitConversion: true,
+  });
+  const errors = validateSync(validatedConfig, {
+    skipMissingProperties: false,
+  });
+
+  if (errors.length > 0) {
+    throw new Error(`Config validation error: ${errors.toString()}`);
+  }
+  return validatedConfig;
+}
--- a/packages/core-service/src/core/auth/.gitkeep
+++ b/packages/core-service/src/core/auth/.gitkeep
--- a/packages/core-service/src/core/auth/auth.controller.ts
+++ b/packages/core-service/src/core/auth/auth.controller.ts
@ -0,0 +1,121 @@
+import {
+  Controller,
+  Post,
+  Body,
+  Res,
+  Req,
+  HttpCode,
+  HttpStatus,
+} from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiBearerAuth } from '@nestjs/swagger';
+import { Request, Response } from 'express';
+import { Public } from '../../common/decorators/public.decorator';
+import { CurrentUser, JwtPayload } from '../../common/decorators/current-user.decorator';
+import { AuthService } from './auth.service';
+import { LoginDto } from './dto/login.dto';
+
+@ApiTags('Authentifizierung')
+@Controller('auth')
+export class AuthController {
+  constructor(private readonly authService: AuthService) {}
+
+  /**
+   * POST /api/v1/auth/login
+   * Login mit E-Mail + Passwort (+ optionaler TOTP-Code).
+   */
+  @Post('login')
+  @Public()
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Login mit E-Mail und Passwort' })
+  async login(
+    @Body() dto: LoginDto,
+    @Res({ passthrough: true }) res: Response,
+  ) {
+    const result = await this.authService.login(dto);
+
+    // 2FA erforderlich - kein Token setzen
+    if (result.requiresTwoFactor) {
+      return {
+        requiresTwoFactor: true,
+        message: 'Bitte 2FA-Code eingeben',
+      };
+    }
+
+    // Refresh-Token als HttpOnly Cookie setzen (NICHT im localStorage!)
+    // Regel: Kein localStorage fuer Tokens
+    this.setRefreshTokenCookie(res, result.accessToken);
+
+    return {
+      accessToken: result.accessToken,
+      user: result.user,
+    };
+  }
+
+  /**
+   * POST /api/v1/auth/refresh
+   * Token-Refresh via HttpOnly Cookie.
+   */
+  @Post('refresh')
+  @Public()
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Access-Token erneuern (Silent Refresh)' })
+  async refresh(
+    @Req() req: Request,
+    @Res({ passthrough: true }) res: Response,
+  ) {
+    const refreshToken = req.cookies?.refresh_token as string | undefined;
+    if (!refreshToken) {
+      res.status(HttpStatus.UNAUTHORIZED).json({
+        message: 'Kein Refresh-Token vorhanden',
+      });
+      return;
+    }
+
+    const tokens = await this.authService.refreshTokens(refreshToken);
+    this.setRefreshTokenCookie(res, tokens.refreshToken);
+
+    return {
+      accessToken: tokens.accessToken,
+    };
+  }
+
+  /**
+   * POST /api/v1/auth/logout
+   * Logout: Tokens invalidieren, Cookie loeschen.
+   */
+  @Post('logout')
+  @HttpCode(HttpStatus.OK)
+  @ApiBearerAuth('access-token')
+  @ApiOperation({ summary: 'Logout und Token-Invalidierung' })
+  async logout(
+    @CurrentUser() user: JwtPayload,
+    @Req() req: Request,
+    @Res({ passthrough: true }) res: Response,
+  ) {
+    const refreshToken = req.cookies?.refresh_token as string | undefined;
+    await this.authService.logout(user, refreshToken);
+
+    // Refresh-Token Cookie loeschen
+    res.clearCookie('refresh_token', {
+      httpOnly: true,
+      secure: true,
+      sameSite: 'strict',
+      path: '/api/v1/auth',
+    });
+
+    return { message: 'Erfolgreich abgemeldet' };
+  }
+
+  /**
+   * Setzt das Refresh-Token als HttpOnly, Secure, SameSite=Strict Cookie.
+   */
+  private setRefreshTokenCookie(res: Response, refreshToken: string): void {
+    res.cookie('refresh_token', refreshToken, {
+      httpOnly: true,
+      secure: true, // Nur HTTPS
+      sameSite: 'strict',
+      path: '/api/v1/auth', // Nur fuer Auth-Endpunkte
+      maxAge: 7 * 24 * 60 * 60 * 1000, // 7 Tage
+    });
+  }
+}
--- a/packages/core-service/src/core/auth/auth.module.ts
+++ b/packages/core-service/src/core/auth/auth.module.ts
@ -0,0 +1,47 @@
+import { Module } from '@nestjs/common';
+import { JwtModule } from '@nestjs/jwt';
+import { PassportModule } from '@nestjs/passport';
+import { ConfigModule, ConfigService } from '@nestjs/config';
+import * as fs from 'fs';
+import { AuthController } from './auth.controller';
+import { AuthService } from './auth.service';
+import { JwtStrategy } from './strategies/jwt.strategy';
+import { TotpService } from './totp.service';
+
+@Module({
+  imports: [
+    PassportModule.register({ defaultStrategy: 'jwt' }),
+    JwtModule.registerAsync({
+      imports: [ConfigModule],
+      inject: [ConfigService],
+      useFactory: (config: ConfigService) => {
+        const privateKeyPath = config.get<string>(
+          'JWT_PRIVATE_KEY_PATH',
+          '/app/keys/jwt-private.pem',
+        );
+        const publicKeyPath = config.get<string>(
+          'JWT_PUBLIC_KEY_PATH',
+          '/app/keys/jwt-public.pem',
+        );
+
+        return {
+          privateKey: fs.readFileSync(privateKeyPath, 'utf8'),
+          publicKey: fs.readFileSync(publicKeyPath, 'utf8'),
+          signOptions: {
+            algorithm: 'RS256',
+            issuer: config.get<string>('JWT_ISSUER', 'insight-platform'),
+            expiresIn: config.get<string>('JWT_ACCESS_TOKEN_EXPIRY', '15m'),
+          },
+          verifyOptions: {
+            algorithms: ['RS256'],
+            issuer: config.get<string>('JWT_ISSUER', 'insight-platform'),
+          },
+        };
+      },
+    }),
+  ],
+  controllers: [AuthController],
+  providers: [AuthService, JwtStrategy, TotpService],
+  exports: [AuthService, JwtModule],
+})
+export class AuthModule {}
--- a/packages/core-service/src/core/auth/auth.service.ts
+++ b/packages/core-service/src/core/auth/auth.service.ts
@ -0,0 +1,264 @@
+import {
+  Injectable,
+  UnauthorizedException,
+  ForbiddenException,
+  Logger,
+} from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { ConfigService } from '@nestjs/config';
+import * as bcrypt from 'bcrypt';
+import { v4 as uuidv4 } from 'uuid';
+import { PrismaService } from '../../prisma/prisma.service';
+import { RedisService } from '../../redis/redis.service';
+import { TotpService } from './totp.service';
+import { LoginDto } from './dto/login.dto';
+import { JwtPayload } from '../../common/decorators/current-user.decorator';
+
+interface TokenPair {
+  accessToken: string;
+  refreshToken: string;
+}
+
+interface LoginResponse {
+  accessToken: string;
+  user: {
+    id: string;
+    email: string;
+    firstName: string;
+    lastName: string;
+    role: string;
+  };
+  requiresTwoFactor?: boolean;
+}
+
+@Injectable()
+export class AuthService {
+  private readonly logger = new Logger(AuthService.name);
+
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly jwt: JwtService,
+    private readonly redis: RedisService,
+    private readonly config: ConfigService,
+    private readonly totp: TotpService,
+  ) {}
+
+  /**
+   * Login mit E-Mail und Passwort.
+   * Gibt AccessToken + Refresh-Token (HttpOnly Cookie) zurueck.
+   */
+  async login(dto: LoginDto): Promise<LoginResponse> {
+    // User finden
+    const user = await this.prisma.user.findUnique({
+      where: { email: dto.email.toLowerCase() },
+      include: {
+        authProvider: true,
+        tenantMemberships: {
+          include: { tenant: true },
+          where: { isActive: true },
+          take: 1,
+        },
+      },
+    });
+
+    if (!user || !user.isActive) {
+      // Generische Fehlermeldung (kein Hinweis ob User existiert)
+      throw new UnauthorizedException('Ungueltige Anmeldedaten');
+    }
+
+    // Passwort pruefen (nur fuer lokale Auth)
+    const localAuth = user.authProvider.find((ap) => ap.provider === 'LOCAL');
+    if (!localAuth?.passwordHash) {
+      throw new UnauthorizedException('Ungueltige Anmeldedaten');
+    }
+
+    const passwordValid = await bcrypt.compare(
+      dto.password,
+      localAuth.passwordHash,
+    );
+    if (!passwordValid) {
+      // Failed Login zaehlen
+      await this.prisma.user.update({
+        where: { id: user.id },
+        data: {
+          failedLoginAttempts: { increment: 1 },
+          lastFailedLogin: new Date(),
+        },
+      });
+      throw new UnauthorizedException('Ungueltige Anmeldedaten');
+    }
+
+    // Account-Sperre pruefen (nach 5 Fehlversuchen)
+    if (user.failedLoginAttempts >= 5) {
+      const lockoutEnd = user.lastFailedLogin
+        ? new Date(user.lastFailedLogin.getTime() + 15 * 60 * 1000) // 15 Min Sperre
+        : null;
+
+      if (lockoutEnd && lockoutEnd > new Date()) {
+        throw new ForbiddenException(
+          'Account temporaer gesperrt. Versuchen Sie es in 15 Minuten erneut.',
+        );
+      }
+    }
+
+    // 2FA pruefen
+    if (user.twoFactorEnabled) {
+      if (!dto.totpCode) {
+        return {
+          accessToken: '',
+          user: {
+            id: user.id,
+            email: user.email,
+            firstName: user.firstName,
+            lastName: user.lastName,
+            role: user.role,
+          },
+          requiresTwoFactor: true,
+        };
+      }
+
+      const totpValid = this.totp.verify(
+        dto.totpCode,
+        localAuth.totpSecret ?? '',
+      );
+      if (!totpValid) {
+        throw new UnauthorizedException('Ungueltiger 2FA-Code');
+      }
+    }
+
+    // Erfolgreicher Login: Counter zuruecksetzen
+    await this.prisma.user.update({
+      where: { id: user.id },
+      data: {
+        failedLoginAttempts: 0,
+        lastLogin: new Date(),
+      },
+    });
+
+    // Tenant-Info
+    const primaryMembership = user.tenantMemberships[0];
+
+    // Tokens generieren
+    const tokens = await this.generateTokenPair({
+      sub: user.id,
+      email: user.email,
+      role: user.role,
+      tenantId: primaryMembership?.tenant.id,
+      tenantSlug: primaryMembership?.tenant.slug,
+    });
+
+    this.logger.log(`Login erfolgreich: ${user.email}`);
+
+    return {
+      accessToken: tokens.accessToken,
+      user: {
+        id: user.id,
+        email: user.email,
+        firstName: user.firstName,
+        lastName: user.lastName,
+        role: user.role,
+      },
+    };
+  }
+
+  /**
+   * Refresh-Token gegen neues Token-Paar tauschen.
+   */
+  async refreshTokens(refreshToken: string): Promise<TokenPair> {
+    try {
+      const payload = this.jwt.verify<JwtPayload>(refreshToken);
+
+      // Refresh-Token-Familie pruefen (Token-Rotation)
+      const isValid = await this.redis.isRefreshTokenFamilyValid(
+        payload.sub,
+        payload.jti,
+      );
+      if (!isValid) {
+        // Moeglicherweise Refresh-Token-Diebstahl: alle invalidieren
+        this.logger.warn(
+          `Verdaechtiger Refresh-Token Wiederverwendung fuer User ${payload.sub}`,
+        );
+        await this.redis.invalidateAllRefreshTokens(payload.sub);
+        throw new UnauthorizedException('Refresh Token ungueltig');
+      }
+
+      // Alten Refresh-Token invalidieren
+      await this.redis.blockToken(payload.jti, 7 * 24 * 60 * 60);
+
+      // Neue Tokens generieren
+      return this.generateTokenPair({
+        sub: payload.sub,
+        email: payload.email,
+        role: payload.role,
+        tenantId: payload.tenantId,
+        tenantSlug: payload.tenantSlug,
+      });
+    } catch (error) {
+      if (error instanceof UnauthorizedException) throw error;
+      throw new UnauthorizedException('Refresh Token ungueltig oder abgelaufen');
+    }
+  }
+
+  /**
+   * Logout: Access- und Refresh-Token invalidieren.
+   */
+  async logout(accessToken: JwtPayload, refreshToken?: string): Promise<void> {
+    // Access-Token blocken (Restlaufzeit)
+    const ttl = accessToken.exp - Math.floor(Date.now() / 1000);
+    if (ttl > 0) {
+      await this.redis.blockToken(accessToken.jti, ttl);
+    }
+
+    // Refresh-Token blocken
+    if (refreshToken) {
+      try {
+        const refreshPayload = this.jwt.verify<JwtPayload>(refreshToken);
+        const refreshTtl =
+          refreshPayload.exp - Math.floor(Date.now() / 1000);
+        if (refreshTtl > 0) {
+          await this.redis.blockToken(refreshPayload.jti, refreshTtl);
+        }
+      } catch {
+        // Refresh-Token ist bereits abgelaufen - ignorieren
+      }
+    }
+
+    this.logger.log(`Logout: User ${accessToken.sub}`);
+  }
+
+  /**
+   * Token-Paar generieren (Access + Refresh).
+   */
+  private async generateTokenPair(
+    payload: Omit<JwtPayload, 'jti' | 'iat' | 'exp'>,
+  ): Promise<TokenPair> {
+    const accessJti = uuidv4();
+    const refreshJti = uuidv4();
+
+    const accessToken = this.jwt.sign({
+      ...payload,
+      jti: accessJti,
+    });
+
+    const refreshExpiry = this.config.get<string>(
+      'JWT_REFRESH_TOKEN_EXPIRY',
+      '7d',
+    );
+    const refreshToken = this.jwt.sign(
+      {
+        ...payload,
+        jti: refreshJti,
+      },
+      { expiresIn: refreshExpiry },
+    );
+
+    // Refresh-Token-Familie in Redis registrieren
+    await this.redis.setRefreshTokenFamily(
+      payload.sub,
+      refreshJti,
+      7 * 24 * 60 * 60, // 7 Tage
+    );
+
+    return { accessToken, refreshToken };
+  }
+}
--- a/packages/core-service/src/core/auth/dto/login.dto.ts
+++ b/packages/core-service/src/core/auth/dto/login.dto.ts
@ -0,0 +1,30 @@
+import { IsEmail, IsNotEmpty, IsOptional, IsString, MinLength } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class LoginDto {
+  @ApiProperty({
+    example: 'admin@xinion.de',
+    description: 'E-Mail-Adresse des Benutzers',
+  })
+  @IsEmail({}, { message: 'Bitte gueltige E-Mail-Adresse angeben' })
+  @IsNotEmpty({ message: 'E-Mail darf nicht leer sein' })
+  email!: string;
+
+  @ApiProperty({
+    example: 'SicheresPasswort123!',
+    description: 'Passwort (mindestens 8 Zeichen)',
+  })
+  @IsString()
+  @IsNotEmpty({ message: 'Passwort darf nicht leer sein' })
+  @MinLength(8, { message: 'Passwort muss mindestens 8 Zeichen lang sein' })
+  password!: string;
+
+  @ApiProperty({
+    example: '123456',
+    description: 'TOTP 2FA-Code (nur wenn 2FA aktiviert)',
+    required: false,
+  })
+  @IsOptional()
+  @IsString()
+  totpCode?: string;
+}
--- a/packages/core-service/src/core/auth/strategies/jwt.strategy.ts
+++ b/packages/core-service/src/core/auth/strategies/jwt.strategy.ts
@ -0,0 +1,47 @@
+import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { PassportStrategy } from '@nestjs/passport';
+import { ExtractJwt, Strategy } from 'passport-jwt';
+import * as fs from 'fs';
+import { JwtPayload } from '../../../common/decorators/current-user.decorator';
+
+/**
+ * JwtStrategy - Passport-Strategy fuer RS256 JWT-Validierung.
+ *
+ * Extrahiert den Token aus dem Authorization-Header (Bearer Token).
+ * Validiert Signatur (RS256), Issuer und Expiration automatisch.
+ */
+@Injectable()
+export class JwtStrategy extends PassportStrategy(Strategy) {
+  constructor(config: ConfigService) {
+    const publicKeyPath = config.get<string>(
+      'JWT_PUBLIC_KEY_PATH',
+      '/app/keys/jwt-public.pem',
+    );
+
+    super({
+      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
+      ignoreExpiration: false,
+      secretOrKey: fs.readFileSync(publicKeyPath, 'utf8'),
+      algorithms: ['RS256'],
+      issuer: config.get<string>('JWT_ISSUER', 'insight-platform'),
+    });
+  }
+
+  /**
+   * Wird nach erfolgreicher JWT-Validierung aufgerufen.
+   * Der Return-Wert landet in request.user.
+   */
+  validate(payload: JwtPayload): JwtPayload {
+    return {
+      sub: payload.sub,
+      email: payload.email,
+      role: payload.role,
+      tenantId: payload.tenantId,
+      tenantSlug: payload.tenantSlug,
+      jti: payload.jti,
+      iat: payload.iat,
+      exp: payload.exp,
+    };
+  }
+}
--- a/packages/core-service/src/core/auth/totp.service.ts
+++ b/packages/core-service/src/core/auth/totp.service.ts
@ -0,0 +1,54 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { authenticator } from 'otplib';
+import * as QRCode from 'qrcode';
+
+/**
+ * TotpService - TOTP 2FA (Time-based One-Time Password).
+ *
+ * Verwendet den Google Authenticator kompatiblen TOTP-Algorithmus.
+ * Secrets werden verschluesselt in der Datenbank gespeichert.
+ */
+@Injectable()
+export class TotpService {
+  private readonly logger = new Logger(TotpService.name);
+
+  constructor() {
+    // TOTP Konfiguration
+    authenticator.options = {
+      step: 30, // 30 Sekunden
+      window: 1, // +/- 1 Schritt Toleranz
+      digits: 6,
+    };
+  }
+
+  /**
+   * Neues TOTP-Secret generieren.
+   */
+  generateSecret(): string {
+    return authenticator.generateSecret();
+  }
+
+  /**
+   * QR-Code als Data-URL generieren (fuer Authenticator-App Setup).
+   */
+  async generateQrCode(email: string, secret: string): Promise<string> {
+    const otpauthUrl = authenticator.keyuri(
+      email,
+      'INSIGHT Platform',
+      secret,
+    );
+    return QRCode.toDataURL(otpauthUrl);
+  }
+
+  /**
+   * TOTP-Code verifizieren.
+   */
+  verify(token: string, secret: string): boolean {
+    try {
+      return authenticator.verify({ token, secret });
+    } catch {
+      this.logger.warn('TOTP-Verifizierung fehlgeschlagen');
+      return false;
+    }
+  }
+}
--- a/packages/core-service/src/core/modules/.gitkeep
+++ b/packages/core-service/src/core/modules/.gitkeep
--- a/packages/core-service/src/core/tenants/.gitkeep
+++ b/packages/core-service/src/core/tenants/.gitkeep
--- a/packages/core-service/src/core/tenants/dto/add-member.dto.ts
+++ b/packages/core-service/src/core/tenants/dto/add-member.dto.ts
@ -0,0 +1,19 @@
+import { IsNotEmpty, IsOptional, IsString, IsUUID, IsIn } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class AddMemberDto {
+  @ApiProperty({ example: '550e8400-e29b-41d4-a716-446655440000' })
+  @IsUUID()
+  @IsNotEmpty()
+  userId!: string;
+
+  @ApiProperty({
+    example: 'MEMBER',
+    enum: ['ADMIN', 'MEMBER', 'VIEWER'],
+    required: false,
+  })
+  @IsOptional()
+  @IsString()
+  @IsIn(['ADMIN', 'MEMBER', 'VIEWER'])
+  role?: string;
+}
--- a/packages/core-service/src/core/tenants/dto/create-tenant.dto.ts
+++ b/packages/core-service/src/core/tenants/dto/create-tenant.dto.ts
@ -0,0 +1,37 @@
+import {
+  IsNotEmpty,
+  IsOptional,
+  IsString,
+  Matches,
+  MaxLength,
+  IsObject,
+} from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class CreateTenantDto {
+  @ApiProperty({ example: 'ACME Corporation' })
+  @IsString()
+  @IsNotEmpty()
+  @MaxLength(200)
+  name!: string;
+
+  @ApiProperty({
+    example: 'acme-corp',
+    description: 'URL-freundlicher Kurzname (a-z, 0-9, Bindestrich)',
+  })
+  @IsString()
+  @IsNotEmpty()
+  @MaxLength(50)
+  @Matches(/^[a-z0-9][a-z0-9-]*[a-z0-9]$/, {
+    message: 'Slug: nur Kleinbuchstaben, Zahlen und Bindestriche erlaubt',
+  })
+  slug!: string;
+
+  @ApiProperty({
+    example: { locale: 'de-DE', timezone: 'Europe/Berlin' },
+    required: false,
+  })
+  @IsOptional()
+  @IsObject()
+  settings?: Record<string, unknown>;
+}
--- a/packages/core-service/src/core/tenants/dto/update-tenant.dto.ts
+++ b/packages/core-service/src/core/tenants/dto/update-tenant.dto.ts
@ -0,0 +1,29 @@
+import {
+  IsBoolean,
+  IsObject,
+  IsOptional,
+  IsString,
+  MaxLength,
+} from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class UpdateTenantDto {
+  @ApiProperty({ example: 'ACME Corp. GmbH', required: false })
+  @IsOptional()
+  @IsString()
+  @MaxLength(200)
+  name?: string;
+
+  @ApiProperty({ example: true, required: false })
+  @IsOptional()
+  @IsBoolean()
+  isActive?: boolean;
+
+  @ApiProperty({
+    example: { locale: 'de-DE', timezone: 'Europe/Berlin' },
+    required: false,
+  })
+  @IsOptional()
+  @IsObject()
+  settings?: Record<string, unknown>;
+}
--- a/packages/core-service/src/core/tenants/tenants.controller.ts
+++ b/packages/core-service/src/core/tenants/tenants.controller.ts
@ -0,0 +1,110 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Patch,
+  Delete,
+  Body,
+  Param,
+  Query,
+  UseGuards,
+  ParseUUIDPipe,
+} from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiBearerAuth } from '@nestjs/swagger';
+import { TenantsService } from './tenants.service';
+import { CreateTenantDto } from './dto/create-tenant.dto';
+import { UpdateTenantDto } from './dto/update-tenant.dto';
+import { AddMemberDto } from './dto/add-member.dto';
+import { Roles } from '../../common/decorators/roles.decorator';
+import { RolesGuard } from '../../common/guards/roles.guard';
+
+@ApiTags('Mandanten')
+@ApiBearerAuth('access-token')
+@Controller('tenants')
+export class TenantsController {
+  constructor(private readonly tenantsService: TenantsService) {}
+
+  /**
+   * GET /api/v1/tenants
+   * Alle Mandanten auflisten (nur PLATFORM_ADMIN).
+   */
+  @Get()
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Alle Mandanten auflisten (Admin)' })
+  async findAll(
+    @Query('page') page?: number,
+    @Query('limit') limit?: number,
+  ) {
+    return this.tenantsService.findAll(page ?? 1, limit ?? 20);
+  }
+
+  /**
+   * GET /api/v1/tenants/:id
+   * Mandant nach ID (nur PLATFORM_ADMIN).
+   */
+  @Get(':id')
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Mandant nach ID abrufen (Admin)' })
+  async findById(@Param('id', ParseUUIDPipe) id: string) {
+    return this.tenantsService.findById(id);
+  }
+
+  /**
+   * POST /api/v1/tenants
+   * Neuen Mandant anlegen (nur PLATFORM_ADMIN).
+   */
+  @Post()
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Neuen Mandanten anlegen (Admin)' })
+  async create(@Body() dto: CreateTenantDto) {
+    return this.tenantsService.create(dto);
+  }
+
+  /**
+   * PATCH /api/v1/tenants/:id
+   * Mandant aktualisieren (nur PLATFORM_ADMIN).
+   */
+  @Patch(':id')
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Mandant aktualisieren (Admin)' })
+  async update(
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: UpdateTenantDto,
+  ) {
+    return this.tenantsService.update(id, dto);
+  }
+
+  /**
+   * POST /api/v1/tenants/:id/members
+   * User einem Mandant zuweisen (nur PLATFORM_ADMIN).
+   */
+  @Post(':id/members')
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Benutzer zu Mandant hinzufuegen (Admin)' })
+  async addMember(
+    @Param('id', ParseUUIDPipe) tenantId: string,
+    @Body() dto: AddMemberDto,
+  ) {
+    return this.tenantsService.addMember(tenantId, dto.userId, dto.role);
+  }
+
+  /**
+   * DELETE /api/v1/tenants/:id/members/:userId
+   * User aus Mandant entfernen (nur PLATFORM_ADMIN).
+   */
+  @Delete(':id/members/:userId')
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Benutzer aus Mandant entfernen (Admin)' })
+  async removeMember(
+    @Param('id', ParseUUIDPipe) tenantId: string,
+    @Param('userId', ParseUUIDPipe) userId: string,
+  ) {
+    return this.tenantsService.removeMember(tenantId, userId);
+  }
+}
--- a/packages/core-service/src/core/tenants/tenants.module.ts
+++ b/packages/core-service/src/core/tenants/tenants.module.ts
@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { TenantsController } from './tenants.controller';
+import { TenantsService } from './tenants.service';
+
+@Module({
+  controllers: [TenantsController],
+  providers: [TenantsService],
+  exports: [TenantsService],
+})
+export class TenantsModule {}
--- a/packages/core-service/src/core/tenants/tenants.service.ts
+++ b/packages/core-service/src/core/tenants/tenants.service.ts
@ -0,0 +1,166 @@
+import {
+  Injectable,
+  ConflictException,
+  NotFoundException,
+  Logger,
+} from '@nestjs/common';
+import { PrismaService } from '../../prisma/prisma.service';
+import { CreateTenantDto } from './dto/create-tenant.dto';
+import { UpdateTenantDto } from './dto/update-tenant.dto';
+
+@Injectable()
+export class TenantsService {
+  private readonly logger = new Logger(TenantsService.name);
+
+  constructor(private readonly prisma: PrismaService) {}
+
+  /**
+   * Neuen Tenant (Mandant) anlegen.
+   */
+  async create(dto: CreateTenantDto) {
+    // Slug-Duplikat pruefen
+    const existing = await this.prisma.tenant.findUnique({
+      where: { slug: dto.slug },
+    });
+    if (existing) {
+      throw new ConflictException(`Tenant-Slug "${dto.slug}" bereits vergeben`);
+    }
+
+    const tenant = await this.prisma.tenant.create({
+      data: {
+        name: dto.name,
+        slug: dto.slug,
+        isActive: true,
+        settings: dto.settings ?? {},
+      },
+    });
+
+    this.logger.log(`Tenant erstellt: ${tenant.name} (${tenant.slug})`);
+
+    // TODO: Tenant-Datenbank erstellen (tenant_{slug})
+    // Das wird spaeter per Prisma Migrate automatisiert
+
+    return tenant;
+  }
+
+  /**
+   * Tenant nach ID finden.
+   */
+  async findById(id: string) {
+    const tenant = await this.prisma.tenant.findUnique({
+      where: { id },
+      include: {
+        _count: {
+          select: { members: true },
+        },
+      },
+    });
+
+    if (!tenant) {
+      throw new NotFoundException('Mandant nicht gefunden');
+    }
+
+    return {
+      ...tenant,
+      memberCount: tenant._count.members,
+    };
+  }
+
+  /**
+   * Alle Tenants auflisten.
+   */
+  async findAll(page = 1, limit = 20) {
+    const skip = (page - 1) * limit;
+
+    const [tenants, total] = await Promise.all([
+      this.prisma.tenant.findMany({
+        skip,
+        take: limit,
+        orderBy: { createdAt: 'desc' },
+        include: {
+          _count: {
+            select: { members: true },
+          },
+        },
+      }),
+      this.prisma.tenant.count(),
+    ]);
+
+    return {
+      data: tenants.map((t) => ({
+        id: t.id,
+        name: t.name,
+        slug: t.slug,
+        isActive: t.isActive,
+        memberCount: t._count.members,
+        createdAt: t.createdAt,
+      })),
+      meta: {
+        total,
+        page,
+        limit,
+        totalPages: Math.ceil(total / limit),
+      },
+    };
+  }
+
+  /**
+   * Tenant aktualisieren.
+   */
+  async update(id: string, dto: UpdateTenantDto) {
+    const tenant = await this.prisma.tenant.findUnique({ where: { id } });
+    if (!tenant) {
+      throw new NotFoundException('Mandant nicht gefunden');
+    }
+
+    return this.prisma.tenant.update({
+      where: { id },
+      data: {
+        name: dto.name,
+        isActive: dto.isActive,
+        settings: dto.settings,
+      },
+    });
+  }
+
+  /**
+   * User einem Tenant zuweisen.
+   */
+  async addMember(tenantId: string, userId: string, role = 'MEMBER') {
+    // Pruefen ob bereits Mitglied
+    const existing = await this.prisma.tenantMembership.findUnique({
+      where: {
+        userId_tenantId: { userId, tenantId },
+      },
+    });
+
+    if (existing) {
+      throw new ConflictException('Benutzer ist bereits Mitglied');
+    }
+
+    return this.prisma.tenantMembership.create({
+      data: {
+        userId,
+        tenantId,
+        tenantRole: role,
+        isActive: true,
+      },
+      include: {
+        user: { select: { email: true, firstName: true, lastName: true } },
+        tenant: { select: { name: true, slug: true } },
+      },
+    });
+  }
+
+  /**
+   * User aus Tenant entfernen (Soft-Delete).
+   */
+  async removeMember(tenantId: string, userId: string) {
+    return this.prisma.tenantMembership.update({
+      where: {
+        userId_tenantId: { userId, tenantId },
+      },
+      data: { isActive: false },
+    });
+  }
+}
--- a/packages/core-service/src/core/users/.gitkeep
+++ b/packages/core-service/src/core/users/.gitkeep
--- a/packages/core-service/src/core/users/dto/create-user.dto.ts
+++ b/packages/core-service/src/core/users/dto/create-user.dto.ts
@ -0,0 +1,46 @@
+import {
+  IsEmail,
+  IsNotEmpty,
+  IsOptional,
+  IsString,
+  MinLength,
+  MaxLength,
+  IsIn,
+} from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class CreateUserDto {
+  @ApiProperty({ example: 'max.mustermann@xinion.de' })
+  @IsEmail({}, { message: 'Bitte gueltige E-Mail-Adresse angeben' })
+  @IsNotEmpty()
+  email!: string;
+
+  @ApiProperty({ example: 'SicheresPasswort123!' })
+  @IsString()
+  @IsNotEmpty()
+  @MinLength(8, { message: 'Passwort muss mindestens 8 Zeichen lang sein' })
+  @MaxLength(128, { message: 'Passwort darf maximal 128 Zeichen lang sein' })
+  password!: string;
+
+  @ApiProperty({ example: 'Max' })
+  @IsString()
+  @IsNotEmpty()
+  @MaxLength(100)
+  firstName!: string;
+
+  @ApiProperty({ example: 'Mustermann' })
+  @IsString()
+  @IsNotEmpty()
+  @MaxLength(100)
+  lastName!: string;
+
+  @ApiProperty({
+    example: 'USER',
+    enum: ['PLATFORM_ADMIN', 'TENANT_ADMIN', 'USER'],
+    required: false,
+  })
+  @IsOptional()
+  @IsString()
+  @IsIn(['PLATFORM_ADMIN', 'TENANT_ADMIN', 'USER'])
+  role?: string;
+}
--- a/packages/core-service/src/core/users/dto/update-user.dto.ts
+++ b/packages/core-service/src/core/users/dto/update-user.dto.ts
@ -0,0 +1,21 @@
+import { IsBoolean, IsOptional, IsString, MaxLength } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class UpdateUserDto {
+  @ApiProperty({ example: 'Max', required: false })
+  @IsOptional()
+  @IsString()
+  @MaxLength(100)
+  firstName?: string;
+
+  @ApiProperty({ example: 'Mustermann', required: false })
+  @IsOptional()
+  @IsString()
+  @MaxLength(100)
+  lastName?: string;
+
+  @ApiProperty({ example: true, required: false })
+  @IsOptional()
+  @IsBoolean()
+  isActive?: boolean;
+}
--- a/packages/core-service/src/core/users/users.controller.ts
+++ b/packages/core-service/src/core/users/users.controller.ts
@ -0,0 +1,89 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Patch,
+  Body,
+  Param,
+  Query,
+  UseGuards,
+  ParseUUIDPipe,
+} from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiBearerAuth } from '@nestjs/swagger';
+import { UsersService } from './users.service';
+import { CreateUserDto } from './dto/create-user.dto';
+import { UpdateUserDto } from './dto/update-user.dto';
+import { Roles } from '../../common/decorators/roles.decorator';
+import { CurrentUser, JwtPayload } from '../../common/decorators/current-user.decorator';
+import { RolesGuard } from '../../common/guards/roles.guard';
+
+@ApiTags('Benutzer')
+@ApiBearerAuth('access-token')
+@Controller('users')
+export class UsersController {
+  constructor(private readonly usersService: UsersService) {}
+
+  /**
+   * GET /api/v1/users/me
+   * Eigenes Profil abrufen.
+   */
+  @Get('me')
+  @ApiOperation({ summary: 'Eigenes Profil abrufen' })
+  async getProfile(@CurrentUser('sub') userId: string) {
+    return this.usersService.findById(userId);
+  }
+
+  /**
+   * GET /api/v1/users
+   * Alle User auflisten (nur PLATFORM_ADMIN).
+   */
+  @Get()
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Alle Benutzer auflisten (Admin)' })
+  async findAll(
+    @Query('page') page?: number,
+    @Query('limit') limit?: number,
+  ) {
+    return this.usersService.findAll(page ?? 1, limit ?? 20);
+  }
+
+  /**
+   * GET /api/v1/users/:id
+   * User nach ID (nur PLATFORM_ADMIN).
+   */
+  @Get(':id')
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Benutzer nach ID abrufen (Admin)' })
+  async findById(@Param('id', ParseUUIDPipe) id: string) {
+    return this.usersService.findById(id);
+  }
+
+  /**
+   * POST /api/v1/users
+   * Neuen User anlegen (nur PLATFORM_ADMIN).
+   */
+  @Post()
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Neuen Benutzer anlegen (Admin)' })
+  async create(@Body() dto: CreateUserDto) {
+    return this.usersService.create(dto);
+  }
+
+  /**
+   * PATCH /api/v1/users/:id
+   * User aktualisieren (nur PLATFORM_ADMIN).
+   */
+  @Patch(':id')
+  @Roles('PLATFORM_ADMIN')
+  @UseGuards(RolesGuard)
+  @ApiOperation({ summary: 'Benutzer aktualisieren (Admin)' })
+  async update(
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: UpdateUserDto,
+  ) {
+    return this.usersService.update(id, dto);
+  }
+}
--- a/packages/core-service/src/core/users/users.module.ts
+++ b/packages/core-service/src/core/users/users.module.ts
@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { UsersController } from './users.controller';
+import { UsersService } from './users.service';
+
+@Module({
+  controllers: [UsersController],
+  providers: [UsersService],
+  exports: [UsersService],
+})
+export class UsersModule {}
--- a/packages/core-service/src/core/users/users.service.ts
+++ b/packages/core-service/src/core/users/users.service.ts
@ -0,0 +1,174 @@
+import {
+  Injectable,
+  ConflictException,
+  NotFoundException,
+  Logger,
+} from '@nestjs/common';
+import * as bcrypt from 'bcrypt';
+import { ConfigService } from '@nestjs/config';
+import { PrismaService } from '../../prisma/prisma.service';
+import { CreateUserDto } from './dto/create-user.dto';
+import { UpdateUserDto } from './dto/update-user.dto';
+
+@Injectable()
+export class UsersService {
+  private readonly logger = new Logger(UsersService.name);
+
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly config: ConfigService,
+  ) {}
+
+  /**
+   * Neuen User anlegen (mit lokalem Auth-Provider).
+   */
+  async create(dto: CreateUserDto) {
+    // Email-Duplikat pruefen
+    const existing = await this.prisma.user.findUnique({
+      where: { email: dto.email.toLowerCase() },
+    });
+    if (existing) {
+      throw new ConflictException('E-Mail-Adresse bereits vergeben');
+    }
+
+    // Passwort hashen (Bcrypt Cost 12)
+    const bcryptCost = this.config.get<number>('BCRYPT_COST', 12);
+    const passwordHash = await bcrypt.hash(dto.password, bcryptCost);
+
+    // User + AuthProvider in einer Transaktion anlegen
+    const user = await this.prisma.user.create({
+      data: {
+        email: dto.email.toLowerCase(),
+        firstName: dto.firstName,
+        lastName: dto.lastName,
+        role: dto.role ?? 'USER',
+        isActive: true,
+        authProvider: {
+          create: {
+            provider: 'LOCAL',
+            passwordHash,
+          },
+        },
+      },
+      include: {
+        authProvider: {
+          select: { provider: true, createdAt: true },
+        },
+      },
+    });
+
+    this.logger.log(`User erstellt: ${user.email} (${user.role})`);
+
+    // Passwort-Hash nicht zurueckgeben
+    return {
+      id: user.id,
+      email: user.email,
+      firstName: user.firstName,
+      lastName: user.lastName,
+      role: user.role,
+      isActive: user.isActive,
+      createdAt: user.createdAt,
+    };
+  }
+
+  /**
+   * User nach ID finden.
+   */
+  async findById(id: string) {
+    const user = await this.prisma.user.findUnique({
+      where: { id },
+      include: {
+        tenantMemberships: {
+          include: { tenant: { select: { id: true, name: true, slug: true } } },
+          where: { isActive: true },
+        },
+      },
+    });
+
+    if (!user) {
+      throw new NotFoundException('Benutzer nicht gefunden');
+    }
+
+    return {
+      id: user.id,
+      email: user.email,
+      firstName: user.firstName,
+      lastName: user.lastName,
+      role: user.role,
+      isActive: user.isActive,
+      twoFactorEnabled: user.twoFactorEnabled,
+      tenants: user.tenantMemberships.map((m) => ({
+        id: m.tenant.id,
+        name: m.tenant.name,
+        slug: m.tenant.slug,
+        role: m.tenantRole,
+      })),
+      lastLogin: user.lastLogin,
+      createdAt: user.createdAt,
+    };
+  }
+
+  /**
+   * User aktualisieren.
+   */
+  async update(id: string, dto: UpdateUserDto) {
+    const user = await this.prisma.user.findUnique({ where: { id } });
+    if (!user) {
+      throw new NotFoundException('Benutzer nicht gefunden');
+    }
+
+    const updated = await this.prisma.user.update({
+      where: { id },
+      data: {
+        firstName: dto.firstName,
+        lastName: dto.lastName,
+        isActive: dto.isActive,
+      },
+    });
+
+    return {
+      id: updated.id,
+      email: updated.email,
+      firstName: updated.firstName,
+      lastName: updated.lastName,
+      role: updated.role,
+      isActive: updated.isActive,
+    };
+  }
+
+  /**
+   * Alle User auflisten (fuer Admin).
+   */
+  async findAll(page = 1, limit = 20) {
+    const skip = (page - 1) * limit;
+
+    const [users, total] = await Promise.all([
+      this.prisma.user.findMany({
+        skip,
+        take: limit,
+        orderBy: { createdAt: 'desc' },
+        select: {
+          id: true,
+          email: true,
+          firstName: true,
+          lastName: true,
+          role: true,
+          isActive: true,
+          lastLogin: true,
+          createdAt: true,
+        },
+      }),
+      this.prisma.user.count(),
+    ]);
+
+    return {
+      data: users,
+      meta: {
+        total,
+        page,
+        limit,
+        totalPages: Math.ceil(total / limit),
+      },
+    };
+  }
+}
--- a/packages/core-service/src/health/health.controller.ts
+++ b/packages/core-service/src/health/health.controller.ts
@ -0,0 +1,72 @@
+import { Controller, Get } from '@nestjs/common';
+import { ApiTags, ApiOperation } from '@nestjs/swagger';
+import { Public } from '../common/decorators/public.decorator';
+import { PrismaService } from '../prisma/prisma.service';
+import { RedisService } from '../redis/redis.service';
+
+interface HealthResponse {
+  status: 'ok' | 'error';
+  timestamp: string;
+  version: string;
+  services: {
+    database: 'up' | 'down';
+    redis: 'up' | 'down';
+  };
+}
+
+@ApiTags('Health')
+@Controller('health')
+export class HealthController {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly redis: RedisService,
+  ) {}
+
+  @Get()
+  @Public()
+  @ApiOperation({ summary: 'Health-Check fuer alle Services' })
+  async check(): Promise<HealthResponse> {
+    const [dbStatus, redisStatus] = await Promise.allSettled([
+      this.checkDatabase(),
+      this.checkRedis(),
+    ]);
+
+    const allUp =
+      dbStatus.status === 'fulfilled' &&
+      dbStatus.value &&
+      redisStatus.status === 'fulfilled' &&
+      redisStatus.value;
+
+    return {
+      status: allUp ? 'ok' : 'error',
+      timestamp: new Date().toISOString(),
+      version: '0.1.0',
+      services: {
+        database:
+          dbStatus.status === 'fulfilled' && dbStatus.value ? 'up' : 'down',
+        redis:
+          redisStatus.status === 'fulfilled' && redisStatus.value
+            ? 'up'
+            : 'down',
+      },
+    };
+  }
+
+  private async checkDatabase(): Promise<boolean> {
+    try {
+      await this.prisma.$queryRaw`SELECT 1`;
+      return true;
+    } catch {
+      return false;
+    }
+  }
+
+  private async checkRedis(): Promise<boolean> {
+    try {
+      const pong = await this.redis.ping();
+      return pong === 'PONG';
+    } catch {
+      return false;
+    }
+  }
+}
--- a/packages/core-service/src/health/health.module.ts
+++ b/packages/core-service/src/health/health.module.ts
@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { HealthController } from './health.controller';
+import { PrismaModule } from '../prisma/prisma.module';
+import { RedisModule } from '../redis/redis.module';
+
+@Module({
+  imports: [PrismaModule, RedisModule],
+  controllers: [HealthController],
+})
+export class HealthModule {}
--- a/packages/core-service/src/main.ts
+++ b/packages/core-service/src/main.ts
@ -0,0 +1,82 @@
+import { NestFactory } from '@nestjs/core';
+import { ValidationPipe, Logger } from '@nestjs/common';
+import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import * as cookieParser from 'cookie-parser';
+import helmet from 'helmet';
+import { AppModule } from './app.module';
+
+async function bootstrap(): Promise<void> {
+  const logger = new Logger('Bootstrap');
+  const app = await NestFactory.create(AppModule, {
+    logger: ['error', 'warn', 'log', 'debug', 'verbose'],
+  });
+
+  // Security
+  app.use(helmet());
+  app.use(cookieParser());
+
+  // CORS
+  const corsOrigins = process.env.CORS_ORIGINS?.split(',') ?? [
+    'https://insight-dev.xinion.lan',
+  ];
+  app.enableCors({
+    origin: corsOrigins,
+    credentials: true,
+    methods: ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'OPTIONS'],
+    allowedHeaders: [
+      'Content-Type',
+      'Authorization',
+      'X-Tenant-ID',
+      'X-Request-ID',
+    ],
+  });
+
+  // Global Validation Pipe (Sicherheitsregel: whitelist + forbidNonWhitelisted)
+  app.useGlobalPipes(
+    new ValidationPipe({
+      whitelist: true,
+      forbidNonWhitelisted: true,
+      transform: true,
+      transformOptions: { enableImplicitConversion: true },
+    }),
+  );
+
+  // Global Prefix
+  app.setGlobalPrefix('api/v1', {
+    exclude: ['health'],
+  });
+
+  // Swagger (nur Development)
+  if (process.env.NODE_ENV !== 'production') {
+    const config = new DocumentBuilder()
+      .setTitle('INSIGHT Platform API')
+      .setDescription('Multi-Tenant Business Platform API')
+      .setVersion('0.1.0')
+      .addBearerAuth(
+        {
+          type: 'http',
+          scheme: 'bearer',
+          bearerFormat: 'JWT',
+          description: 'Access Token (RS256)',
+        },
+        'access-token',
+      )
+      .addCookieAuth('refresh_token', {
+        type: 'apiKey',
+        in: 'cookie',
+        description: 'HttpOnly Refresh Token',
+      })
+      .build();
+
+    const document = SwaggerModule.createDocument(app, config);
+    SwaggerModule.setup('api/docs', app, document);
+    logger.log('Swagger UI: /api/docs');
+  }
+
+  const port = process.env.APP_PORT ?? 3000;
+  await app.listen(port);
+  logger.log(`Core-Service laeuft auf Port ${port}`);
+  logger.log(`Umgebung: ${process.env.NODE_ENV ?? 'development'}`);
+}
+
+bootstrap();
--- a/packages/core-service/src/prisma/.gitkeep
+++ b/packages/core-service/src/prisma/.gitkeep
--- a/packages/core-service/src/prisma/prisma.module.ts
+++ b/packages/core-service/src/prisma/prisma.module.ts
@ -0,0 +1,10 @@
+import { Global, Module } from '@nestjs/common';
+import { PrismaService } from './prisma.service';
+import { TenantPrismaService } from './tenant-prisma.service';
+
+@Global()
+@Module({
+  providers: [PrismaService, TenantPrismaService],
+  exports: [PrismaService, TenantPrismaService],
+})
+export class PrismaModule {}
--- a/packages/core-service/src/prisma/prisma.service.ts
+++ b/packages/core-service/src/prisma/prisma.service.ts
@ -0,0 +1,32 @@
+import { Injectable, OnModuleInit, OnModuleDestroy, Logger } from '@nestjs/common';
+import { PrismaClient } from '@prisma/client';
+
+@Injectable()
+export class PrismaService
+  extends PrismaClient
+  implements OnModuleInit, OnModuleDestroy
+{
+  private readonly logger = new Logger(PrismaService.name);
+
+  constructor() {
+    super({
+      log: [
+        { emit: 'event', level: 'query' },
+        { emit: 'stdout', level: 'info' },
+        { emit: 'stdout', level: 'warn' },
+        { emit: 'stdout', level: 'error' },
+      ],
+    });
+  }
+
+  async onModuleInit(): Promise<void> {
+    this.logger.log('Verbinde mit PostgreSQL (platform_core)...');
+    await this.$connect();
+    this.logger.log('PostgreSQL Verbindung hergestellt.');
+  }
+
+  async onModuleDestroy(): Promise<void> {
+    this.logger.log('Trenne PostgreSQL Verbindung...');
+    await this.$disconnect();
+  }
+}
--- a/packages/core-service/src/prisma/tenant-prisma.service.ts
+++ b/packages/core-service/src/prisma/tenant-prisma.service.ts
@ -0,0 +1,103 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { PrismaClient } from '@prisma/client';
+
+/**
+ * TenantPrismaService - Verwaltet dynamische Datenbankverbindungen pro Mandant.
+ *
+ * Jeder Tenant hat eine eigene Datenbank (tenant_{slug}).
+ * Verbindungen werden gecacht und bei Inaktivitaet automatisch geschlossen.
+ */
+@Injectable()
+export class TenantPrismaService {
+  private readonly logger = new Logger(TenantPrismaService.name);
+  private readonly clients = new Map<
+    string,
+    { client: PrismaClient; lastUsed: number }
+  >();
+
+  // Maximale Inaktivitaetszeit in Millisekunden (30 Minuten)
+  private readonly MAX_IDLE_TIME = 30 * 60 * 1000;
+
+  /**
+   * Gibt einen PrismaClient fuer den angegebenen Tenant zurueck.
+   * Erstellt eine neue Verbindung oder nutzt eine gecachte.
+   */
+  async getClient(tenantSlug: string): Promise<PrismaClient> {
+    const existing = this.clients.get(tenantSlug);
+    if (existing) {
+      existing.lastUsed = Date.now();
+      return existing.client;
+    }
+
+    const dbName = `tenant_${tenantSlug}`;
+    const baseUrl = process.env.DATABASE_URL_DIRECT ?? process.env.DATABASE_URL;
+    if (!baseUrl) {
+      throw new Error('DATABASE_URL ist nicht konfiguriert');
+    }
+
+    // URL modifizieren: Datenbankname ersetzen
+    const url = new URL(baseUrl);
+    url.pathname = `/${dbName}`;
+
+    const client = new PrismaClient({
+      datasources: {
+        db: { url: url.toString() },
+      },
+    });
+
+    await client.$connect();
+    this.logger.log(`Tenant-DB Verbindung hergestellt: ${dbName}`);
+
+    this.clients.set(tenantSlug, {
+      client,
+      lastUsed: Date.now(),
+    });
+
+    return client;
+  }
+
+  /**
+   * Schliesst eine bestimmte Tenant-Verbindung.
+   */
+  async disconnectTenant(tenantSlug: string): Promise<void> {
+    const existing = this.clients.get(tenantSlug);
+    if (existing) {
+      await existing.client.$disconnect();
+      this.clients.delete(tenantSlug);
+      this.logger.log(`Tenant-DB Verbindung geschlossen: tenant_${tenantSlug}`);
+    }
+  }
+
+  /**
+   * Schliesst alle inaktiven Verbindungen.
+   * Wird periodisch vom CleanupService aufgerufen.
+   */
+  async cleanupIdleConnections(): Promise<number> {
+    const now = Date.now();
+    let closed = 0;
+
+    for (const [slug, entry] of this.clients.entries()) {
+      if (now - entry.lastUsed > this.MAX_IDLE_TIME) {
+        await entry.client.$disconnect();
+        this.clients.delete(slug);
+        this.logger.log(
+          `Idle Tenant-DB Verbindung geschlossen: tenant_${slug}`,
+        );
+        closed++;
+      }
+    }
+
+    return closed;
+  }
+
+  /**
+   * Schliesst alle Tenant-Verbindungen (Shutdown).
+   */
+  async disconnectAll(): Promise<void> {
+    for (const [slug, entry] of this.clients.entries()) {
+      await entry.client.$disconnect();
+      this.logger.log(`Tenant-DB Verbindung geschlossen: tenant_${slug}`);
+    }
+    this.clients.clear();
+  }
+}
--- a/packages/core-service/src/redis/redis.module.ts
+++ b/packages/core-service/src/redis/redis.module.ts
@ -0,0 +1,9 @@
+import { Global, Module } from '@nestjs/common';
+import { RedisService } from './redis.service';
+
+@Global()
+@Module({
+  providers: [RedisService],
+  exports: [RedisService],
+})
+export class RedisModule {}
--- a/packages/core-service/src/redis/redis.service.ts
+++ b/packages/core-service/src/redis/redis.service.ts
@ -0,0 +1,144 @@
+import {
+  Injectable,
+  OnModuleInit,
+  OnModuleDestroy,
+  Logger,
+} from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import Redis from 'ioredis';
+
+/**
+ * RedisService - Zentraler Redis-Client fuer Cache, Sessions und Token-Revocation.
+ *
+ * Verwendungszwecke:
+ * - Token-Blocklist (JWT Revocation)
+ * - Session-Cache
+ * - Rate-Limit-Counter
+ * - Pub/Sub Event Bus (spaeter)
+ */
+@Injectable()
+export class RedisService implements OnModuleInit, OnModuleDestroy {
+  private readonly logger = new Logger(RedisService.name);
+  private client!: Redis;
+
+  constructor(private readonly config: ConfigService) {}
+
+  async onModuleInit(): Promise<void> {
+    const host = this.config.get<string>('REDIS_HOST', 'redis');
+    const port = this.config.get<number>('REDIS_PORT', 6379);
+    const password = this.config.get<string>('REDIS_PASSWORD');
+
+    this.client = new Redis({
+      host,
+      port,
+      password: password || undefined,
+      maxRetriesPerRequest: 3,
+      retryStrategy: (times: number) => {
+        if (times > 10) {
+          this.logger.error(
+            'Redis: Maximale Verbindungsversuche erreicht. Gebe auf.',
+          );
+          return null;
+        }
+        return Math.min(times * 200, 5000);
+      },
+      lazyConnect: true,
+    });
+
+    this.client.on('error', (err: Error) => {
+      this.logger.error(`Redis Fehler: ${err.message}`);
+    });
+
+    this.client.on('connect', () => {
+      this.logger.log('Redis Verbindung hergestellt.');
+    });
+
+    await this.client.connect();
+  }
+
+  async onModuleDestroy(): Promise<void> {
+    this.logger.log('Trenne Redis Verbindung...');
+    await this.client.quit();
+  }
+
+  /**
+   * Ping - Verbindungstest
+   */
+  async ping(): Promise<string> {
+    return this.client.ping();
+  }
+
+  /**
+   * Token in die Blocklist aufnehmen (JWT Revocation).
+   * TTL = Restlaufzeit des Tokens.
+   */
+  async blockToken(jti: string, ttlSeconds: number): Promise<void> {
+    await this.client.set(`blocked:${jti}`, '1', 'EX', ttlSeconds);
+  }
+
+  /**
+   * Pruefen ob ein Token blockiert ist.
+   */
+  async isTokenBlocked(jti: string): Promise<boolean> {
+    const result = await this.client.get(`blocked:${jti}`);
+    return result !== null;
+  }
+
+  /**
+   * Refresh-Token-Familie speichern (fuer Token-Rotation-Detection).
+   */
+  async setRefreshTokenFamily(
+    userId: string,
+    familyId: string,
+    ttlSeconds: number,
+  ): Promise<void> {
+    await this.client.set(
+      `refresh_family:${userId}:${familyId}`,
+      '1',
+      'EX',
+      ttlSeconds,
+    );
+  }
+
+  /**
+   * Pruefen ob Refresh-Token-Familie gueltig ist.
+   */
+  async isRefreshTokenFamilyValid(
+    userId: string,
+    familyId: string,
+  ): Promise<boolean> {
+    const result = await this.client.get(
+      `refresh_family:${userId}:${familyId}`,
+    );
+    return result !== null;
+  }
+
+  /**
+   * Alle Refresh-Token-Familien eines Users invalidieren (Logout-All).
+   */
+  async invalidateAllRefreshTokens(userId: string): Promise<void> {
+    const keys = await this.client.keys(`refresh_family:${userId}:*`);
+    if (keys.length > 0) {
+      await this.client.del(...keys);
+    }
+  }
+
+  /**
+   * Generischer Get/Set/Del fuer Cache-Operationen.
+   */
+  async get(key: string): Promise<string | null> {
+    return this.client.get(key);
+  }
+
+  async set(key: string, value: string, ttlSeconds?: number): Promise<void> {
+    if (ttlSeconds) {
+      await this.client.set(key, value, 'EX', ttlSeconds);
+    } else {
+      await this.client.set(key, value);
+    }
+  }
+
+  async del(key: string): Promise<void> {
+    await this.client.del(key);
+  }
+}
--- a/packages/core-service/tsconfig.build.json
+++ b/packages/core-service/tsconfig.build.json
@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["node_modules", "dist", "test", "**/*spec.ts"]
+}
--- a/packages/core-service/tsconfig.json
+++ b/packages/core-service/tsconfig.json
@ -0,0 +1,29 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "declaration": true,
+    "removeComments": true,
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "allowSyntheticDefaultImports": true,
+    "target": "ES2022",
+    "sourceMap": true,
+    "outDir": "./dist",
+    "baseUrl": "./",
+    "incremental": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "esModuleInterop": true,
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist", "test"]
+}
--- a/packages/frontend/.dockerignore
+++ b/packages/frontend/.dockerignore
@ -0,0 +1,6 @@
+node_modules
+dist
+.env
+*.md
+.git
+.gitignore
--- a/packages/frontend/Dockerfile
+++ b/packages/frontend/Dockerfile
@ -0,0 +1,34 @@
+# ============================================================
+# INSIGHT Frontend - Multi-Stage Dockerfile
+# ============================================================
+
+# --- Base Stage ---
+FROM node:20-alpine AS base
+WORKDIR /app
+
+# --- Dependencies Stage ---
+FROM base AS deps
+COPY package.json package-lock.json* ./
+RUN npm ci
+
+# --- Development Stage ---
+FROM base AS development
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+EXPOSE 8080
+CMD ["npm", "run", "dev"]
+
+# --- Build Stage ---
+FROM base AS build
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+# --- Production Stage ---
+FROM nginx:alpine AS production
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 8080
+CMD ["nginx", "-g", "daemon off;"]
--- a/packages/frontend/index.html
+++ b/packages/frontend/index.html
@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="de">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>INSIGHT Platform</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
--- a/packages/frontend/nginx.conf
+++ b/packages/frontend/nginx.conf
@ -0,0 +1,33 @@
+server {
+    listen 8080;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # SPA: Alle Routen auf index.html weiterleiten
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Security Headers
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+
+    # Caching fuer Assets
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # Kein Caching fuer index.html
+    location = /index.html {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+    }
+
+    # Gzip
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml;
+    gzip_min_length 1000;
+}
--- a/packages/frontend/package.json
+++ b/packages/frontend/package.json
@ -0,0 +1,34 @@
+{
+  "name": "@insight/frontend",
+  "version": "0.1.0",
+  "description": "INSIGHT MVP - Frontend (React + Vite)",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "preview": "vite preview",
+    "lint": "eslint . --ext ts,tsx --fix",
+    "lint:check": "eslint . --ext ts,tsx",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "react": "^18.3.0",
+    "react-dom": "^18.3.0",
+    "react-router-dom": "^6.26.0",
+    "axios": "^1.7.0",
+    "@tanstack/react-query": "^5.56.0"
+  },
+  "devDependencies": {
+    "@types/react": "^18.3.0",
+    "@types/react-dom": "^18.3.0",
+    "@typescript-eslint/eslint-plugin": "^8.0.0",
+    "@typescript-eslint/parser": "^8.0.0",
+    "@vitejs/plugin-react": "^4.3.0",
+    "eslint": "^9.0.0",
+    "eslint-plugin-react-hooks": "^5.0.0",
+    "eslint-plugin-react-refresh": "^0.4.0",
+    "typescript": "^5.6.0",
+    "vite": "^6.0.0"
+  }
+}
--- a/packages/frontend/src/admin/.gitkeep
+++ b/packages/frontend/src/admin/.gitkeep
--- a/packages/frontend/src/admin/AdminTenantsPage.tsx
+++ b/packages/frontend/src/admin/AdminTenantsPage.tsx
@ -0,0 +1,96 @@
+import { useQuery } from '@tanstack/react-query';
+import api from '../api/client';
+
+interface Tenant {
+  id: string;
+  name: string;
+  slug: string;
+  isActive: boolean;
+  memberCount: number;
+  createdAt: string;
+}
+
+interface TenantsResponse {
+  data: Tenant[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+export function AdminTenantsPage() {
+  const { data, isLoading, error } = useQuery<TenantsResponse>({
+    queryKey: ['admin', 'tenants'],
+    queryFn: async () => {
+      const response = await api.get<TenantsResponse>('/tenants');
+      return response.data;
+    },
+  });
+
+  if (isLoading) return <p>Laden...</p>;
+  if (error) return <p style={{ color: 'var(--color-error)' }}>Fehler beim Laden der Mandanten</p>;
+
+  return (
+    <div>
+      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '1.5rem' }}>
+        <h1 style={{ fontSize: '1.5rem', fontWeight: 600 }}>Mandantenverwaltung</h1>
+        <span style={{ color: 'var(--color-text-muted)', fontSize: '0.875rem' }}>
+          {data?.meta.total ?? 0} Mandanten gesamt
+        </span>
+      </div>
+
+      <div style={{
+        background: 'var(--color-bg-card)',
+        borderRadius: 'var(--radius-md)',
+        boxShadow: 'var(--shadow-sm)',
+        border: '1px solid var(--color-border)',
+        overflow: 'hidden',
+      }}>
+        <table style={{ width: '100%', borderCollapse: 'collapse' }}>
+          <thead>
+            <tr style={{ borderBottom: '1px solid var(--color-border)', background: 'var(--color-bg)' }}>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Name</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Slug</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Mitglieder</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Status</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Erstellt</th>
+            </tr>
+          </thead>
+          <tbody>
+            {data?.data.map((tenant) => (
+              <tr key={tenant.id} style={{ borderBottom: '1px solid var(--color-border)' }}>
+                <td style={{ padding: '0.75rem 1rem', fontSize: '0.875rem', fontWeight: 500 }}>
+                  {tenant.name}
+                </td>
+                <td style={{ padding: '0.75rem 1rem', fontSize: '0.875rem' }}>
+                  <code style={{ background: 'var(--color-bg)', padding: '0.125rem 0.375rem', borderRadius: 'var(--radius-sm)', fontSize: '0.8125rem' }}>
+                    {tenant.slug}
+                  </code>
+                </td>
+                <td style={{ padding: '0.75rem 1rem', fontSize: '0.875rem' }}>
+                  {tenant.memberCount}
+                </td>
+                <td style={{ padding: '0.75rem 1rem' }}>
+                  <span style={{
+                    display: 'inline-block',
+                    width: 8,
+                    height: 8,
+                    borderRadius: '50%',
+                    background: tenant.isActive ? 'var(--color-success)' : 'var(--color-error)',
+                    marginRight: '0.375rem',
+                  }} />
+                  <span style={{ fontSize: '0.875rem' }}>{tenant.isActive ? 'Aktiv' : 'Inaktiv'}</span>
+                </td>
+                <td style={{ padding: '0.75rem 1rem', fontSize: '0.875rem', color: 'var(--color-text-muted)' }}>
+                  {new Date(tenant.createdAt).toLocaleDateString('de-DE')}
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  );
+}
--- a/packages/frontend/src/admin/AdminUsersPage.tsx
+++ b/packages/frontend/src/admin/AdminUsersPage.tsx
@ -0,0 +1,106 @@
+import { useQuery } from '@tanstack/react-query';
+import api from '../api/client';
+
+interface User {
+  id: string;
+  email: string;
+  firstName: string;
+  lastName: string;
+  role: string;
+  isActive: boolean;
+  lastLogin: string | null;
+  createdAt: string;
+}
+
+interface UsersResponse {
+  data: User[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+export function AdminUsersPage() {
+  const { data, isLoading, error } = useQuery<UsersResponse>({
+    queryKey: ['admin', 'users'],
+    queryFn: async () => {
+      const response = await api.get<UsersResponse>('/users');
+      return response.data;
+    },
+  });
+
+  if (isLoading) return <p>Laden...</p>;
+  if (error) return <p style={{ color: 'var(--color-error)' }}>Fehler beim Laden der Benutzer</p>;
+
+  return (
+    <div>
+      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '1.5rem' }}>
+        <h1 style={{ fontSize: '1.5rem', fontWeight: 600 }}>Benutzerverwaltung</h1>
+        <span style={{ color: 'var(--color-text-muted)', fontSize: '0.875rem' }}>
+          {data?.meta.total ?? 0} Benutzer gesamt
+        </span>
+      </div>
+
+      <div style={{
+        background: 'var(--color-bg-card)',
+        borderRadius: 'var(--radius-md)',
+        boxShadow: 'var(--shadow-sm)',
+        border: '1px solid var(--color-border)',
+        overflow: 'hidden',
+      }}>
+        <table style={{ width: '100%', borderCollapse: 'collapse' }}>
+          <thead>
+            <tr style={{ borderBottom: '1px solid var(--color-border)', background: 'var(--color-bg)' }}>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Name</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>E-Mail</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Rolle</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Status</th>
+              <th style={{ padding: '0.75rem 1rem', textAlign: 'left', fontSize: '0.75rem', textTransform: 'uppercase', color: 'var(--color-text-muted)' }}>Letzter Login</th>
+            </tr>
+          </thead>
+          <tbody>
+            {data?.data.map((user) => (
+              <tr key={user.id} style={{ borderBottom: '1px solid var(--color-border)' }}>
+                <td style={{ padding: '0.75rem 1rem', fontSize: '0.875rem' }}>
+                  {user.firstName} {user.lastName}
+                </td>
+                <td style={{ padding: '0.75rem 1rem', fontSize: '0.875rem', color: 'var(--color-text-secondary)' }}>
+                  {user.email}
+                </td>
+                <td style={{ padding: '0.75rem 1rem' }}>
+                  <span style={{
+                    display: 'inline-block',
+                    padding: '0.125rem 0.5rem',
+                    borderRadius: '9999px',
+                    fontSize: '0.75rem',
+                    fontWeight: 500,
+                    background: user.role === 'PLATFORM_ADMIN' ? '#dbeafe' : '#f3f4f6',
+                    color: user.role === 'PLATFORM_ADMIN' ? '#1e40af' : '#374151',
+                  }}>
+                    {user.role}
+                  </span>
+                </td>
+                <td style={{ padding: '0.75rem 1rem' }}>
+                  <span style={{
+                    display: 'inline-block',
+                    width: 8,
+                    height: 8,
+                    borderRadius: '50%',
+                    background: user.isActive ? 'var(--color-success)' : 'var(--color-error)',
+                    marginRight: '0.375rem',
+                  }} />
+                  <span style={{ fontSize: '0.875rem' }}>{user.isActive ? 'Aktiv' : 'Inaktiv'}</span>
+                </td>
+                <td style={{ padding: '0.75rem 1rem', fontSize: '0.875rem', color: 'var(--color-text-muted)' }}>
+                  {user.lastLogin ? new Date(user.lastLogin).toLocaleDateString('de-DE') : 'Nie'}
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  );
+}
--- a/packages/frontend/src/api/client.ts
+++ b/packages/frontend/src/api/client.ts
@ -0,0 +1,76 @@
+import axios from 'axios';
+
+/**
+ * Axios-Client mit automatischem Token-Handling.
+ *
+ * SICHERHEITSREGEL: Access-Token wird NUR im Memory gehalten (Variable).
+ * Kein localStorage! Refresh-Token kommt als HttpOnly Cookie.
+ */
+
+// Access-Token im Memory (nicht localStorage!)
+let accessToken: string | null = null;
+
+export const setAccessToken = (token: string | null): void => {
+  accessToken = token;
+};
+
+export const getAccessToken = (): string | null => {
+  return accessToken;
+};
+
+// API-Client
+const api = axios.create({
+  baseURL: '/api/v1',
+  withCredentials: true, // HttpOnly Cookie mitsenden
+  headers: {
+    'Content-Type': 'application/json',
+  },
+});
+
+// Request-Interceptor: Access-Token anfuegen
+api.interceptors.request.use((config) => {
+  if (accessToken) {
+    config.headers.Authorization = `Bearer ${accessToken}`;
+  }
+  return config;
+});
+
+// Response-Interceptor: Bei 401 automatisch Token erneuern (Silent Refresh)
+api.interceptors.response.use(
+  (response) => response,
+  async (error) => {
+    const originalRequest = error.config;
+
+    // Bei 401 und noch kein Retry versucht
+    if (
+      error.response?.status === 401 &&
+      !originalRequest._retry &&
+      originalRequest.url !== '/auth/refresh' &&
+      originalRequest.url !== '/auth/login'
+    ) {
+      originalRequest._retry = true;
+
+      try {
+        // Silent Refresh via HttpOnly Cookie
+        const { data } = await axios.post<{ accessToken: string }>(
+          '/api/v1/auth/refresh',
+          {},
+          { withCredentials: true },
+        );
+
+        setAccessToken(data.accessToken);
+        originalRequest.headers.Authorization = `Bearer ${data.accessToken}`;
+        return api(originalRequest);
+      } catch {
+        // Refresh fehlgeschlagen: Logout
+        setAccessToken(null);
+        window.location.href = '/login';
+        return Promise.reject(error);
+      }
+    }
+
+    return Promise.reject(error);
+  },
+);
+
+export default api;
--- a/packages/frontend/src/auth/.gitkeep
+++ b/packages/frontend/src/auth/.gitkeep
--- a/packages/frontend/src/auth/AuthContext.tsx
+++ b/packages/frontend/src/auth/AuthContext.tsx
@ -0,0 +1,130 @@
+import {
+  createContext,
+  useContext,
+  useState,
+  useCallback,
+  useEffect,
+  type ReactNode,
+} from 'react';
+import api, { setAccessToken } from '../api/client';
+
+interface User {
+  id: string;
+  email: string;
+  firstName: string;
+  lastName: string;
+  role: string;
+}
+
+interface AuthContextType {
+  user: User | null;
+  isAuthenticated: boolean;
+  isLoading: boolean;
+  login: (email: string, password: string, totpCode?: string) => Promise<LoginResult>;
+  logout: () => Promise<void>;
+}
+
+interface LoginResult {
+  success: boolean;
+  requiresTwoFactor?: boolean;
+  error?: string;
+}
+
+const AuthContext = createContext<AuthContextType | null>(null);
+
+export function AuthProvider({ children }: { children: ReactNode }) {
+  const [user, setUser] = useState<User | null>(null);
+  const [isLoading, setIsLoading] = useState(true);
+
+  // Beim Start: Silent Refresh versuchen
+  useEffect(() => {
+    const initAuth = async () => {
+      try {
+        const { data } = await api.post<{ accessToken: string }>(
+          '/auth/refresh',
+        );
+        setAccessToken(data.accessToken);
+
+        // User-Profil laden
+        const profileResponse = await api.get<User>('/users/me');
+        setUser(profileResponse.data);
+      } catch {
+        // Nicht eingeloggt - normal
+        setAccessToken(null);
+        setUser(null);
+      } finally {
+        setIsLoading(false);
+      }
+    };
+
+    initAuth();
+  }, []);
+
+  const login = useCallback(
+    async (
+      email: string,
+      password: string,
+      totpCode?: string,
+    ): Promise<LoginResult> => {
+      try {
+        const { data } = await api.post<{
+          accessToken?: string;
+          user?: User;
+          requiresTwoFactor?: boolean;
+        }>('/auth/login', { email, password, totpCode });
+
+        if (data.requiresTwoFactor) {
+          return { success: false, requiresTwoFactor: true };
+        }
+
+        if (data.accessToken && data.user) {
+          setAccessToken(data.accessToken);
+          setUser(data.user);
+          return { success: true };
+        }
+
+        return { success: false, error: 'Unerwartete Antwort vom Server' };
+      } catch (err: unknown) {
+        const error = err as { response?: { data?: { message?: string } } };
+        return {
+          success: false,
+          error: error.response?.data?.message ?? 'Login fehlgeschlagen',
+        };
+      }
+    },
+    [],
+  );
+
+  const logout = useCallback(async () => {
+    try {
+      await api.post('/auth/logout');
+    } catch {
+      // Fehler ignorieren
+    } finally {
+      setAccessToken(null);
+      setUser(null);
+    }
+  }, []);
+
+  return (
+    <AuthContext.Provider
+      value={{
+        user,
+        isAuthenticated: !!user,
+        isLoading,
+        login,
+        logout,
+      }}
+    >
+      {children}
+    </AuthContext.Provider>
+  );
+}
+
+export function useAuth(): AuthContextType {
+  const context = useContext(AuthContext);
+  if (!context) {
+    throw new Error('useAuth muss innerhalb von AuthProvider verwendet werden');
+  }
+  return context;
+}
--- a/packages/frontend/src/auth/LoginPage.module.css
+++ b/packages/frontend/src/auth/LoginPage.module.css
@ -0,0 +1,106 @@
+.container {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  min-height: 100vh;
+  background: linear-gradient(135deg, #1a56db 0%, #1e3a5f 100%);
+}
+
+.card {
+  background: var(--color-bg-card);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-md);
+  padding: 2.5rem;
+  width: 100%;
+  max-width: 400px;
+}
+
+.logo {
+  text-align: center;
+  margin-bottom: 2rem;
+}
+
+.logo h1 {
+  font-size: 2rem;
+  font-weight: 700;
+  color: var(--color-primary);
+  letter-spacing: 2px;
+}
+
+.logo p {
+  color: var(--color-text-secondary);
+  font-size: 0.875rem;
+  margin-top: 0.25rem;
+}
+
+.form {
+  display: flex;
+  flex-direction: column;
+  gap: 1.25rem;
+}
+
+.field {
+  display: flex;
+  flex-direction: column;
+  gap: 0.375rem;
+}
+
+.field label {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--color-text);
+}
+
+.field input {
+  padding: 0.625rem 0.75rem;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  font-size: 0.9375rem;
+  transition: border-color 0.15s;
+}
+
+.field input:focus {
+  outline: none;
+  border-color: var(--color-primary);
+  box-shadow: 0 0 0 3px var(--color-primary-light);
+}
+
+.field input:disabled {
+  background: var(--color-bg);
+  color: var(--color-text-muted);
+}
+
+.field small {
+  color: var(--color-text-muted);
+  font-size: 0.75rem;
+}
+
+.button {
+  padding: 0.75rem;
+  background: var(--color-primary);
+  color: white;
+  border: none;
+  border-radius: var(--radius-sm);
+  font-size: 1rem;
+  font-weight: 600;
+  transition: background 0.15s;
+  margin-top: 0.5rem;
+}
+
+.button:hover:not(:disabled) {
+  background: var(--color-primary-hover);
+}
+
+.button:disabled {
+  opacity: 0.7;
+  cursor: not-allowed;
+}
+
+.error {
+  background: #fef2f2;
+  color: var(--color-error);
+  padding: 0.75rem;
+  border-radius: var(--radius-sm);
+  font-size: 0.875rem;
+  border: 1px solid #fecaca;
+}
--- a/packages/frontend/src/auth/LoginPage.tsx
+++ b/packages/frontend/src/auth/LoginPage.tsx
@ -0,0 +1,113 @@
+import { useState, type FormEvent } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { useAuth } from './AuthContext';
+import styles from './LoginPage.module.css';
+
+export function LoginPage() {
+  const navigate = useNavigate();
+  const { login } = useAuth();
+
+  const [email, setEmail] = useState('');
+  const [password, setPassword] = useState('');
+  const [totpCode, setTotpCode] = useState('');
+  const [showTotp, setShowTotp] = useState(false);
+  const [error, setError] = useState('');
+  const [isSubmitting, setIsSubmitting] = useState(false);
+
+  const handleSubmit = async (e: FormEvent) => {
+    e.preventDefault();
+    setError('');
+    setIsSubmitting(true);
+
+    try {
+      const result = await login(
+        email,
+        password,
+        showTotp ? totpCode : undefined,
+      );
+
+      if (result.requiresTwoFactor) {
+        setShowTotp(true);
+        setIsSubmitting(false);
+        return;
+      }
+
+      if (result.success) {
+        navigate('/');
+      } else {
+        setError(result.error ?? 'Login fehlgeschlagen');
+      }
+    } finally {
+      setIsSubmitting(false);
+    }
+  };
+
+  return (
+    <div className={styles.container}>
+      <div className={styles.card}>
+        <div className={styles.logo}>
+          <h1>INSIGHT</h1>
+          <p>Business Platform</p>
+        </div>
+
+        <form onSubmit={handleSubmit} className={styles.form}>
+          {error && <div className={styles.error}>{error}</div>}
+
+          <div className={styles.field}>
+            <label htmlFor="email">E-Mail</label>
+            <input
+              id="email"
+              type="email"
+              value={email}
+              onChange={(e) => setEmail(e.target.value)}
+              placeholder="ihre@email.de"
+              required
+              autoFocus
+              disabled={showTotp}
+            />
+          </div>
+
+          <div className={styles.field}>
+            <label htmlFor="password">Passwort</label>
+            <input
+              id="password"
+              type="password"
+              value={password}
+              onChange={(e) => setPassword(e.target.value)}
+              placeholder="Passwort eingeben"
+              required
+              minLength={8}
+              disabled={showTotp}
+            />
+          </div>
+
+          {showTotp && (
+            <div className={styles.field}>
+              <label htmlFor="totp">2FA-Code</label>
+              <input
+                id="totp"
+                type="text"
+                value={totpCode}
+                onChange={(e) => setTotpCode(e.target.value)}
+                placeholder="6-stelliger Code"
+                maxLength={6}
+                pattern="[0-9]{6}"
+                required
+                autoFocus
+              />
+              <small>Code aus Ihrer Authenticator-App eingeben</small>
+            </div>
+          )}
+
+          <button
+            type="submit"
+            className={styles.button}
+            disabled={isSubmitting}
+          >
+            {isSubmitting ? 'Anmeldung...' : 'Anmelden'}
+          </button>
+        </form>
+      </div>
+    </div>
+  );
+}
--- a/packages/frontend/src/components/HelpPanel/.gitkeep
+++ b/packages/frontend/src/components/HelpPanel/.gitkeep
--- a/packages/frontend/src/components/HelpTooltip/.gitkeep
+++ b/packages/frontend/src/components/HelpTooltip/.gitkeep
--- a/packages/frontend/src/index.css
+++ b/packages/frontend/src/index.css
@ -0,0 +1,75 @@
+/* ============================================================
+   INSIGHT MVP - Globale Styles
+   ============================================================ */
+
+:root {
+  /* Farben - Corporate Design */
+  --color-primary: #1a56db;
+  --color-primary-hover: #1e40af;
+  --color-primary-light: #dbeafe;
+  --color-secondary: #6b7280;
+  --color-success: #059669;
+  --color-warning: #d97706;
+  --color-error: #dc2626;
+
+  /* Graustufen */
+  --color-bg: #f9fafb;
+  --color-bg-card: #ffffff;
+  --color-border: #e5e7eb;
+  --color-text: #111827;
+  --color-text-secondary: #6b7280;
+  --color-text-muted: #9ca3af;
+
+  /* Layout */
+  --sidebar-width: 240px;
+  --header-height: 56px;
+
+  /* Schatten */
+  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
+  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
+
+  /* Radien */
+  --radius-sm: 4px;
+  --radius-md: 8px;
+  --radius-lg: 12px;
+
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
+    'Helvetica Neue', Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+  color: var(--color-text);
+  background-color: var(--color-bg);
+}
+
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  min-height: 100vh;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  color: var(--color-primary);
+  text-decoration: none;
+}
+
+a:hover {
+  text-decoration: underline;
+}
+
+button {
+  cursor: pointer;
+  font-family: inherit;
+}
+
+input,
+textarea,
+select {
+  font-family: inherit;
+  font-size: inherit;
+}
--- a/packages/frontend/src/main.tsx
+++ b/packages/frontend/src/main.tsx
@ -0,0 +1,29 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import { BrowserRouter } from 'react-router-dom';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { AuthProvider } from './auth/AuthContext';
+import { App } from './shell/App';
+import './index.css';
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      retry: 1,
+      staleTime: 5 * 60 * 1000, // 5 Minuten
+      refetchOnWindowFocus: false,
+    },
+  },
+});
+
+ReactDOM.createRoot(document.getElementById('root')!).render(
+  <React.StrictMode>
+    <BrowserRouter>
+      <QueryClientProvider client={queryClient}>
+        <AuthProvider>
+          <App />
+        </AuthProvider>
+      </QueryClientProvider>
+    </BrowserRouter>
+  </React.StrictMode>,
+);
--- a/packages/frontend/src/shell/.gitkeep
+++ b/packages/frontend/src/shell/.gitkeep
--- a/packages/frontend/src/shell/App.tsx
+++ b/packages/frontend/src/shell/App.tsx
@ -0,0 +1,51 @@
+import { Routes, Route, Navigate } from 'react-router-dom';
+import { useAuth } from '../auth/AuthContext';
+import { LoginPage } from '../auth/LoginPage';
+import { AppLayout } from './AppLayout';
+import { DashboardPage } from './DashboardPage';
+import { AdminUsersPage } from '../admin/AdminUsersPage';
+import { AdminTenantsPage } from '../admin/AdminTenantsPage';
+
+function PrivateRoute({ children }: { children: React.ReactNode }) {
+  const { isAuthenticated, isLoading } = useAuth();
+
+  if (isLoading) {
+    return (
+      <div style={{ display: 'flex', justifyContent: 'center', alignItems: 'center', height: '100vh' }}>
+        <p>Laden...</p>
+      </div>
+    );
+  }
+
+  if (!isAuthenticated) {
+    return <Navigate to="/login" replace />;
+  }
+
+  return <>{children}</>;
+}
+
+export function App() {
+  return (
+    <Routes>
+      {/* Oeffentliche Routen */}
+      <Route path="/login" element={<LoginPage />} />
+
+      {/* Geschuetzte Routen */}
+      <Route
+        path="/"
+        element={
+          <PrivateRoute>
+            <AppLayout />
+          </PrivateRoute>
+        }
+      >
+        <Route index element={<DashboardPage />} />
+        <Route path="admin/users" element={<AdminUsersPage />} />
+        <Route path="admin/tenants" element={<AdminTenantsPage />} />
+      </Route>
+
+      {/* Fallback */}
+      <Route path="*" element={<Navigate to="/" replace />} />
+    </Routes>
+  );
+}
--- a/packages/frontend/src/shell/AppLayout.module.css
+++ b/packages/frontend/src/shell/AppLayout.module.css
@ -0,0 +1,105 @@
+.layout {
+  display: flex;
+  min-height: 100vh;
+}
+
+.sidebar {
+  width: var(--sidebar-width);
+  background: #1e293b;
+  color: white;
+  display: flex;
+  flex-direction: column;
+  position: fixed;
+  top: 0;
+  left: 0;
+  bottom: 0;
+  z-index: 100;
+}
+
+.brand {
+  padding: 1.25rem 1.5rem;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.brand h2 {
+  font-size: 1.25rem;
+  font-weight: 700;
+  letter-spacing: 2px;
+  color: #60a5fa;
+}
+
+.nav {
+  flex: 1;
+  padding: 1rem 0;
+  overflow-y: auto;
+}
+
+.navSection {
+  padding: 1rem 1.5rem 0.5rem;
+  font-size: 0.6875rem;
+  text-transform: uppercase;
+  letter-spacing: 1px;
+  color: rgba(255, 255, 255, 0.4);
+  font-weight: 600;
+}
+
+.navLink {
+  display: block;
+  padding: 0.625rem 1.5rem;
+  color: rgba(255, 255, 255, 0.7);
+  text-decoration: none;
+  font-size: 0.875rem;
+  transition: all 0.15s;
+  border-left: 3px solid transparent;
+}
+
+.navLink:hover {
+  color: white;
+  background: rgba(255, 255, 255, 0.05);
+  text-decoration: none;
+}
+
+.active {
+  color: white;
+  background: rgba(96, 165, 250, 0.15);
+  border-left-color: #60a5fa;
+}
+
+.userInfo {
+  padding: 1rem 1.5rem;
+  border-top: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.userName {
+  font-size: 0.875rem;
+  font-weight: 600;
+}
+
+.userEmail {
+  font-size: 0.75rem;
+  color: rgba(255, 255, 255, 0.5);
+  margin-top: 0.125rem;
+}
+
+.logoutBtn {
+  margin-top: 0.75rem;
+  width: 100%;
+  padding: 0.5rem;
+  background: rgba(255, 255, 255, 0.1);
+  color: rgba(255, 255, 255, 0.8);
+  border: 1px solid rgba(255, 255, 255, 0.15);
+  border-radius: var(--radius-sm);
+  font-size: 0.8125rem;
+  transition: all 0.15s;
+}
+
+.logoutBtn:hover {
+  background: rgba(255, 255, 255, 0.15);
+  color: white;
+}
+
+.main {
+  flex: 1;
+  margin-left: var(--sidebar-width);
+  padding: 2rem;
+}
--- a/packages/frontend/src/shell/AppLayout.tsx
+++ b/packages/frontend/src/shell/AppLayout.tsx
@ -0,0 +1,74 @@
+import { Outlet, NavLink, useNavigate } from 'react-router-dom';
+import { useAuth } from '../auth/AuthContext';
+import styles from './AppLayout.module.css';
+
+export function AppLayout() {
+  const { user, logout } = useAuth();
+  const navigate = useNavigate();
+
+  const handleLogout = async () => {
+    await logout();
+    navigate('/login');
+  };
+
+  return (
+    <div className={styles.layout}>
+      {/* Sidebar */}
+      <aside className={styles.sidebar}>
+        <div className={styles.brand}>
+          <h2>INSIGHT</h2>
+        </div>
+
+        <nav className={styles.nav}>
+          <NavLink
+            to="/"
+            end
+            className={({ isActive }) =>
+              `${styles.navLink} ${isActive ? styles.active : ''}`
+            }
+          >
+            Dashboard
+          </NavLink>
+
+          {/* Admin-Bereich (nur fuer PLATFORM_ADMIN) */}
+          {user?.role === 'PLATFORM_ADMIN' && (
+            <>
+              <div className={styles.navSection}>Administration</div>
+              <NavLink
+                to="/admin/users"
+                className={({ isActive }) =>
+                  `${styles.navLink} ${isActive ? styles.active : ''}`
+                }
+              >
+                Benutzer
+              </NavLink>
+              <NavLink
+                to="/admin/tenants"
+                className={({ isActive }) =>
+                  `${styles.navLink} ${isActive ? styles.active : ''}`
+                }
+              >
+                Mandanten
+              </NavLink>
+            </>
+          )}
+        </nav>
+
+        <div className={styles.userInfo}>
+          <div className={styles.userName}>
+            {user?.firstName} {user?.lastName}
+          </div>
+          <div className={styles.userEmail}>{user?.email}</div>
+          <button className={styles.logoutBtn} onClick={handleLogout}>
+            Abmelden
+          </button>
+        </div>
+      </aside>
+
+      {/* Main Content */}
+      <main className={styles.main}>
+        <Outlet />
+      </main>
+    </div>
+  );
+}
--- a/packages/frontend/src/shell/DashboardPage.tsx
+++ b/packages/frontend/src/shell/DashboardPage.tsx
@ -0,0 +1,31 @@
+import { useAuth } from '../auth/AuthContext';
+
+export function DashboardPage() {
+  const { user } = useAuth();
+
+  return (
+    <div>
+      <h1 style={{ fontSize: '1.5rem', fontWeight: 600, marginBottom: '1.5rem' }}>
+        Dashboard
+      </h1>
+
+      <div style={{
+        background: 'var(--color-bg-card)',
+        borderRadius: 'var(--radius-md)',
+        padding: '1.5rem',
+        boxShadow: 'var(--shadow-sm)',
+        border: '1px solid var(--color-border)',
+      }}>
+        <h2 style={{ fontSize: '1.125rem', marginBottom: '1rem' }}>
+          Willkommen, {user?.firstName}!
+        </h2>
+        <p style={{ color: 'var(--color-text-secondary)' }}>
+          INSIGHT Platform - Sprint 1 Alpha
+        </p>
+        <p style={{ color: 'var(--color-text-muted)', fontSize: '0.875rem', marginTop: '0.5rem' }}>
+          Rolle: {user?.role}
+        </p>
+      </div>
+    </div>
+  );
+}
--- a/packages/frontend/tsconfig.json
+++ b/packages/frontend/tsconfig.json
@ -0,0 +1,29 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "strict": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "esModuleInterop": true,
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src", "vite-env.d.ts"]
+}
--- a/packages/frontend/vite-env.d.ts
+++ b/packages/frontend/vite-env.d.ts
@ -0,0 +1 @@
+/// <reference types="vite/client" />
--- a/packages/frontend/vite.config.ts
+++ b/packages/frontend/vite.config.ts
@ -0,0 +1,26 @@
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+import path from 'path';
+
+export default defineConfig({
+  plugins: [react()],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+  server: {
+    port: 8080,
+    host: true,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:3000',
+        changeOrigin: true,
+      },
+    },
+  },
+  build: {
+    outDir: 'dist',
+    sourcemap: true,
+  },
+});