removed all cors statemnts

.env.template

@@ -0,0 +1,16 @@
+# === SCHICHTPLANER DOCKER COMPOSE ENVIRONMENT VARIABLES ===
+# Diese Datei wird von docker-compose automatisch geladen
+
+# Security
+JWT_SECRET=${JWT_SECRET:-your-secret-key-please-change}
+NODE_ENV=${NODE_ENV:-production}
+
+# Database
+DB_PATH=${DB_PATH:-/app/data/database.db}
+
+# Server
+PORT=${PORT:-3002}
+
+# App Configuration
+APP_TITLE="Shift Planning App"
+ENABLE_PRO=${ENABLE_PRO:-false}

.github/workflows/docker.yml

@@ -0,0 +1,180 @@
+name: CI/CD Pipeline
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "development", "main", "staging" ]
+    tags: [ "v*.*.*" ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  set-tag:
+    name: Set Tag Name
+    runs-on: ubuntu-latest
+    outputs:
+      tag_name: ${{ steps.set_tag.outputs.tag_name }}
+      is_main_branch: ${{ steps.branch_check.outputs.is_main }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Check if main branch
+        id: branch_check
+        run: |
+          if [[ "${{ github.ref }}" == "refs/heads/main" || "${{ github.ref }}" == "refs/heads/master" ]]; then
+            echo "is_main=true" >> $GITHUB_OUTPUT
+          else
+            echo "is_main=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Determine next semantic version tag
+        id: set_tag
+        run: |
+          git fetch --tags
+
+          # Find latest tag matching vX.Y.Z
+          latest_tag=$(git tag --list 'v*.*.*' --sort=-v:refname | head -n 1)
+          echo "Latest tag found: $latest_tag"
+          
+          if [[ -z "$latest_tag" ]]; then
+            major=0
+            minor=0
+            patch=0
+            echo "No existing tags found, starting from v0.0.0"
+          else
+            version="${latest_tag#v}"
+            IFS='.' read -r major minor patch <<< "$version"
+            echo "Parsed version: major=$major, minor=$minor, patch=$patch"
+          fi
+
+          if [[ "${{ github.ref }}" == "refs/heads/main" || "${{ github.ref }}" == "refs/heads/master" ]]; then
+            major=$((major + 1))
+            minor=0
+            patch=0
+            echo "Main branch - major version bump"
+          elif [[ "${{ github.ref }}" == "refs/heads/development" ]]; then
+            minor=$((minor + 1))
+            patch=0
+            echo "Development branch - minor version bump"
+          else
+            patch=$((patch + 1))
+            echo "Other branch - patch version bump"
+          fi
+
+          new_tag="v${major}.${minor}.${patch}"
+          echo "tag_name=${new_tag}" >> $GITHUB_OUTPUT
+          echo "Next version tag: ${new_tag}"
+
+  test:
+    runs-on: ubuntu-latest
+    needs: set-tag
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install backend dependencies
+        working-directory: ./backend
+        run: npm install
+
+      - name: Run TypeScript check
+        working-directory: ./backend
+        run: npx tsc --noEmit
+
+      - name: Run backend tests
+        working-directory: ./backend
+        run: |
+          if [ -f "node_modules/.bin/jest" ]; then
+            npm test
+          else
+            echo "⚠️  Jest not installed. Skipping tests."
+          fi
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+
+      - name: Install Python dependencies
+        run: pip install ortools
+
+      - name: Test Python integration
+        run: |
+          python -c "from ortools.sat.python import cp_model; print('OR-Tools available')"
+
+      - name: Display next version
+        run: |
+          echo "Next version will be: ${{ needs.set-tag.outputs.tag_name }}"
+
+  build-and-push:
+    needs: [set-tag, test]
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+    
+    permissions:
+      contents: write
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=${{ needs.set-tag.outputs.tag_name }}
+            type=raw,value=latest,enable=${{ fromJSON(needs.set-tag.outputs.is_main_branch) }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Create Git Tag
+        if: success()
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git tag ${{ needs.set-tag.outputs.tag_name }}
+          git push origin ${{ needs.set-tag.outputs.tag_name }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Display pushed images
+        run: |
+          echo "Docker images pushed successfully!"
+          echo "- Image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
+          echo "- Tags: ${{ steps.meta.outputs.tags }}"
+          echo "- New version: ${{ needs.set-tag.outputs.tag_name }}"
+          echo "- Is main branch: ${{ needs.set-tag.outputs.is_main_branch }}"

.gitignore

@@ -0,0 +1,139 @@
+# Dependencies
+backend/node_modules/
+frontend/node_modules/
+
+/.pnp
+.pnp.js
+
+# Testing
+/coverage
+
+# Production
+/build
+
+# Misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.env
+
+# Logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+
+----
+# Dependencies
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Build outputs
+dist/
+build/
+
+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.env.production
+
+# Database
+database/*.db
+database/*.db-journal
+*.sqlite
+*.db
+
+# Logs
+logs
+*.log
+
+# Privat
+backend/src/python-scripts/progress_data/*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage/
+
+# nyc test coverage
+.nyc_output
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Ignore contents of premium folder in public repo
+premium/*
+!premium/README-PREMIUM.md
+!premium/.gitkeep
+
+.git
+.gitignore
+node_modules
+npm-debug.log
+README.md
+.env
+.nyc_output
+coverage
+.cache
+dist
+build
+logs
+*.tsbuildinfo
+
+# Frontend specific
+frontend/dist
+frontend/.vite
+
+# Backend specific  
+backend/dist

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "premium"]
+	path = premium
+	url = https://github.com/donpat1to/Schichtenplaner-Pro.git

Dockerfile

@@ -0,0 +1,86 @@
+# Single stage build for workspaces
+FROM node:20-bullseye AS builder
+
+WORKDIR /app
+
+# Install Python + OR-Tools
+RUN apt-get update && apt-get install -y python3 python3-pip build-essential \
+  && pip install --no-cache-dir ortools
+
+# Create symlink so python3 is callable as python
+RUN ln -sf /usr/bin/python3 /usr/bin/python
+
+# Copy root package files first
+COPY package*.json ./
+COPY tsconfig.base.json ./
+COPY ecosystem.config.cjs ./
+
+# Install root dependencies
+RUN npm install --only=production
+
+# Copy workspace files
+COPY backend/ ./backend/
+COPY frontend/ ./frontend/
+
+# Install workspace dependencies individually
+RUN npm install --workspace=backend
+RUN npm install --workspace=frontend
+
+# Build backend first
+RUN npm run build --only=production --workspace=backend
+
+# Build frontend
+RUN npm run build --workspace=frontend
+
+# Verify Python and OR-Tools installation
+RUN python -c "from ortools.sat.python import cp_model; print('OR-Tools installed successfully')"
+
+# Production stage
+FROM node:20-bookworm
+
+WORKDIR /app
+
+# Install system dependencies including gettext-base for envsubst
+RUN apt-get update && apt-get install -y gettext-base && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN npm install -g pm2
+RUN mkdir -p /app/data
+
+# Copy application files
+COPY --from=builder /app/backend/dist/ ./dist/
+COPY --from=builder /app/backend/package*.json ./
+
+COPY --from=builder /app/node_modules/ ./node_modules/
+COPY --from=builder /app/frontend/dist/ ./frontend-build/
+
+COPY --from=builder /app/ecosystem.config.cjs ./
+
+COPY --from=builder /app/backend/src/database/ ./dist/database/
+COPY --from=builder /app/backend/src/database/ ./database/
+
+# Copy init script and env template
+COPY docker-init.sh /usr/local/bin/
+COPY .env.template ./
+
+# Set execute permissions for init script
+RUN chmod +x /usr/local/bin/docker-init.sh
+
+# Create user and set permissions
+RUN groupadd -g 1001 nodejs && \
+    useradd -m -u 1001 -s /bin/bash -g nodejs schichtplan && \
+    chown -R schichtplan:nodejs /app && \
+    chmod 755 /app && \
+    chmod 775 /app/data
+
+ENV PM2_HOME=/app/.pm2
+
+# Set entrypoint to init script and keep existing cmd
+ENTRYPOINT ["/usr/local/bin/docker-init.sh"]
+CMD ["pm2-runtime", "ecosystem.config.cjs"]
+
+USER schichtplan
+EXPOSE 3002
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
+  CMD wget --no-verbose --tries=1 --spider http://localhost:3002/api/health || exit 1

LICENSE-COMMERCIAL

@@ -0,0 +1,21 @@
+COMMERCIAL LICENSE AGREEMENT
+Copyright (c) 2025 Patrick Mahnke-Hartmann
+
+This software, "Schichtenplaner", is offered under a dual licensing model.
+
+1. Open-Source License
+   You may use this software under the terms of the MIT License
+   (see LICENSE file) for non-commercial, personal, or educational use.
+
+2. Commercial License
+   Commercial use of this software requires a separate paid license.
+   This includes, but is not limited to:
+   - Use in proprietary, for-profit, or internal business applications
+   - Use within paid services or SaaS offerings
+   - Integration into commercial software or distributions
+
+To obtain a commercial license, please contact:
+📧 dev.patrick@mahnke-hartmann.de
+or open an inquiry via GitHub: https://github.com/donpat1to/Schichtenplaner
+
+Without a valid commercial license, all commercial rights are reserved.

README.md

@@ -2,4 +2,14 @@
 Aufteilung der Schichten unter Mitarbeitern
 
 
-du knlich
+## 🧾 License
+
+This project uses a **dual license model**:
+
+- **Community Edition:** Licensed under [MIT](./LICENSE) for personal and non-commercial use.
+- **Commercial Edition:** A [commercial license](./LICENSE-COMMERCIAL) is required for any for-profit or business use.
+
+To obtain a commercial license, contact:  
+📧 patrick@mahnke-hartmann.dev
+
+[![License: MIT & Commercial](https://img.shields.io/badge/license-MIT%20%7C%20Commercial-purple)](#license)

backend/.gitignore

@@ -1,59 +0,0 @@
-# Dependencies
-node_modules/
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Build outputs
-dist/
-build/
-
-# Environment variables
-.env
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-
-# Database
-database/*.db
-database/*.db-journal
-*.sqlite
-*.db
-
-# Logs
-logs
-*.log
-
-# Runtime data
-pids
-*.pid
-*.seed
-*.pid.lock
-
-# Coverage directory used by tools like istanbul
-coverage/
-
-# nyc test coverage
-.nyc_output
-
-# IDEs
-.vscode/
-.idea/
-*.swp
-*.swo
-
-# OS generated files
-.DS_Store
-.DS_Store?
-._*
-.Spotlight-V100
-.Trashes
-ehthumbs.db
-Thumbs.db
-
-# Optional npm cache directory
-.npm
-
-# Optional eslint cache
-.eslintcache

backend/dockerfile

@@ -1,8 +0,0 @@
-# backend/Dockerfile
-FROM node:18-alpine
-WORKDIR /app
-COPY package*.json ./
-RUN npm ci --only=production
-COPY . .
-EXPOSE 3002
-CMD ["node", "dist/server.js"]

backend/dockerfilexpython

@@ -1,61 +0,0 @@
-# Multi-stage Dockerfile for Node.js + Python application
-FROM node:20-alpine AS node-base
-
-# Install Python and build dependencies in Node stage
-RUN apk add --no-cache \
-    python3 \
-    py3-pip \
-    build-base \
-    python3-dev
-
-# Install Python dependencies
-COPY python-scripts/requirements.txt /tmp/requirements.txt
-RUN pip3 install --no-cache-dir -r /tmp/requirements.txt
-
-# Set working directory
-WORKDIR /app
-
-# Copy package files
-COPY package*.json ./
-
-# Install Node.js dependencies
-RUN npm ci --only=production
-
-# Build stage
-FROM node-base AS builder
-
-# Install all dependencies (including dev dependencies)
-RUN npm ci
-
-# Copy source code
-COPY . .
-
-# Build the application
-RUN npm run build
-
-# Production stage
-FROM node-base AS production
-
-# Copy built application from builder stage
-COPY --from=builder /app/dist ./dist
-COPY --from=builder /app/package*.json ./
-
-# Copy Python scripts
-COPY --from=builder /app/python-scripts ./python-scripts
-
-# Create non-root user
-RUN addgroup -g 1001 -S nodejs && \
-    adduser -S nextjs -u 1001
-
-# Change to non-root user
-USER nextjs
-
-# Expose port
-EXPOSE 3000
-
-# Health check
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-    CMD node dist/health-check.js
-
-# Start the application
-CMD ["npm", "start"]

backend/jest.config.js

@@ -0,0 +1,18 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/src'],
+  testMatch: [
+    '**/__tests__/**/*.+(ts|tsx|js)',
+    '**/?(*.)+(spec|test).+(ts|tsx|js)'
+  ],
+  transform: {
+    '^.+\.(ts|tsx)$': 'ts-jest',
+  },
+  collectCoverageFrom: [
+    'src/**/*.{js,ts}',
+    '!src/server.ts',
+    '!src/**/*.d.ts'
+  ],
+};

backend/package.json

@@ -6,25 +6,30 @@
     "dev": "npm run build && npx tsx src/server.ts",
     "build": "tsc", 
     "start": "node dist/server.js",
-    "prestart": "npm run build"
+    "prestart": "npm run build",
+    "test": "jest",
+    "test:python": "python -c \"from ortools.sat.python import cp_model; print('OR-Tools OK')\"",
+    "docker:build": "docker build -t schichtplan-backend .",
+    "docker:run": "docker run -p 3001:3001 schichtplan-backend"
   },
   "dependencies": {
     "@types/bcrypt": "^6.0.0",
     "bcrypt": "^6.0.0",
     "bcryptjs": "^2.4.3",
-    "cors": "^2.8.5",
     "express": "^4.18.2",
     "jsonwebtoken": "^9.0.2",
     "sqlite3": "^5.1.6",
     "uuid": "^9.0.0",
-    "worker_threads": "native"
+    "express-rate-limit": "8.1.0",
+    "helmet": "8.1.0",
+    "express-validator": "7.3.0"
   },
   "devDependencies": {
     "@types/bcryptjs": "^2.4.2",
-    "@types/cors": "^2.8.13",
     "@types/express": "^4.17.17",
     "@types/jsonwebtoken": "^9.0.2",
     "@types/uuid": "^9.0.2",
+    "@types/jest": "^29.5.0",
     "ts-node": "^10.9.0",
     "typescript": "^5.0.0",
     "tsx": "^4.0.0"

backend/src/controllers/employeeController.ts

@@ -1,5 +1,5 @@
 // backend/src/controllers/employeeController.ts
-import { Request, Response } from 'express';
+import { Response } from 'express';
 import { v4 as uuidv4 } from 'uuid';
 import bcrypt from 'bcryptjs';
 import { db } from '../services/databaseService.js';

backend/src/controllers/setupController.ts

@@ -1,7 +1,6 @@
 // backend/src/controllers/setupController.ts
 import { Request, Response } from 'express';
 import bcrypt from 'bcrypt';
-import { v4 as uuidv4 } from 'uuid';
 import { randomUUID } from 'crypto';
 import { db } from '../services/databaseService.js';
 

backend/src/controllers/shiftPlanController.ts

@@ -5,10 +5,9 @@ import { db } from '../services/databaseService.js';
 import { 
   CreateShiftPlanRequest, 
   UpdateShiftPlanRequest,
-  ShiftPlan
 } from '../models/ShiftPlan.js';
 import { AuthRequest } from '../middleware/auth.js';
-import { createPlanFromPreset, TEMPLATE_PRESETS } from '../models/defaults/shiftPlanDefaults.js';
+import { TEMPLATE_PRESETS } from '../models/defaults/shiftPlanDefaults.js';
 
 async function getPlanWithDetails(planId: string) {
   const plan = await db.get<any>(`

backend/src/database/schema.sql

@@ -1,3 +1,8 @@
+PRAGMA journal_mode = WAL;
+PRAGMA foreign_keys = ON;
+PRAGMA secure_delete = ON;
+PRAGMA auto_vacuum = INCREMENTAL;
+
 -- Employee Types
 CREATE TABLE IF NOT EXISTS employee_types (
   type TEXT PRIMARY KEY,

backend/src/middleware/rateLimit.ts

@@ -0,0 +1,48 @@
+import rateLimit from 'express-rate-limit';
+import { Request } from 'express';
+
+// Helper to check if request should be limited
+const shouldSkipLimit = (req: Request): boolean => {
+  const skipPaths = [
+    '/api/health', 
+    '/api/setup/status',
+    '/api/auth/validate'
+  ];
+  
+  // Skip for successful GET requests (data fetching)
+  if (req.method === 'GET' && req.path.startsWith('/api/')) {
+    return true;
+  }
+  
+  return skipPaths.includes(req.path);
+};
+
+// Main API limiter - nur für POST/PUT/DELETE
+export const apiLimiter = rateLimit({
+  windowMs: 15 * 60 * 1000, // 15 minutes
+  max: 200, // 200 non-GET requests per 15 minutes
+  message: { 
+    error: 'Zu viele Anfragen, bitte verlangsamen Sie Ihre Aktionen' 
+  },
+  standardHeaders: true,
+  legacyHeaders: false,
+  skip: (req) => {
+    // ✅ Skip für GET requests (Data Fetching)
+    if (req.method === 'GET') return true;
+    
+    // ✅ Skip für Health/Status Checks
+    return shouldSkipLimit(req);
+  }
+});
+
+// Strict limiter for auth endpoints
+export const authLimiter = rateLimit({
+  windowMs: 15 * 60 * 1000,
+  max: 5,
+  message: { 
+    error: 'Zu viele Login-Versuche, bitte versuchen Sie es später erneut' 
+  },
+  standardHeaders: true,
+  legacyHeaders: false,
+  skipSuccessfulRequests: true,
+});

backend/src/middleware/validation.ts

@@ -0,0 +1,457 @@
+import { body, validationResult, param, query } from 'express-validator';
+import { Request, Response, NextFunction } from 'express';
+
+// ===== AUTH VALIDATION =====
+export const validateLogin = [
+  body('email')
+    .isEmail()
+    .withMessage('Must be a valid email')
+    .normalizeEmail(),
+  
+  body('password')
+    .isLength({ min: 6 })
+    .withMessage('Password must be at least 6 characters')
+    .trim()
+    .escape()
+];
+
+export const validateRegister = [
+  body('firstname')
+    .isLength({ min: 1, max: 100 })
+    .withMessage('First name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('lastname')
+    .isLength({ min: 1, max: 100 })
+    .withMessage('Last name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('password')
+    .isLength({ min: 8 })
+    .withMessage('Password must be at least 8 characters')
+    .matches(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)/)
+    .withMessage('Password must contain uppercase, lowercase and number')
+];
+
+// ===== EMPLOYEE VALIDATION =====
+export const validateEmployee = [
+  body('firstname')
+    .isLength({ min: 1, max: 100 })
+    .withMessage('First name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('lastname')
+    .isLength({ min: 1, max: 100 })
+    .withMessage('Last name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('password')
+    .optional()
+    .isLength({ min: 8 })
+    .withMessage('Password must be at least 8 characters')
+    .matches(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)/)
+    .withMessage('Password must contain uppercase, lowercase and number'),
+  
+  body('employeeType')
+    .isIn(['manager', 'personell', 'apprentice', 'guest'])
+    .withMessage('Employee type must be manager, personell, apprentice or guest'),
+  
+  body('contractType')
+    .optional()
+    .isIn(['small', 'large', 'flexible'])
+    .withMessage('Contract type must be small, large or flexible'),
+  
+  body('roles')
+    .optional()
+    .isArray()
+    .withMessage('Roles must be an array'),
+  
+  body('roles.*')
+    .optional()
+    .isIn(['admin', 'maintenance', 'user'])
+    .withMessage('Invalid role. Allowed: admin, maintenance, user'),
+  
+  body('canWorkAlone')
+    .optional()
+    .isBoolean()
+    .withMessage('canWorkAlone must be a boolean'),
+  
+  body('isTrainee')
+    .optional()
+    .isBoolean()
+    .withMessage('isTrainee must be a boolean'),
+  
+  body('isActive')
+    .optional()
+    .isBoolean()
+    .withMessage('isActive must be a boolean')
+];
+
+export const validateEmployeeUpdate = [
+  body('firstname')
+    .optional()
+    .isLength({ min: 1, max: 100 })
+    .withMessage('First name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('lastname')
+    .optional()
+    .isLength({ min: 1, max: 100 })
+    .withMessage('Last name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('employeeType')
+    .optional()
+    .isIn(['manager', 'personell', 'apprentice', 'guest'])
+    .withMessage('Employee type must be manager, personell, apprentice or guest'),
+  
+  body('contractType')
+    .optional()
+    .isIn(['small', 'large', 'flexible'])
+    .withMessage('Contract type must be small, large or flexible'),
+  
+  body('roles')
+    .optional()
+    .isArray()
+    .withMessage('Roles must be an array'),
+  
+  body('roles.*')
+    .optional()
+    .isIn(['admin', 'maintenance', 'user'])
+    .withMessage('Invalid role. Allowed: admin, maintenance, user'),
+  
+  body('canWorkAlone')
+    .optional()
+    .isBoolean()
+    .withMessage('canWorkAlone must be a boolean'),
+  
+  body('isTrainee')
+    .optional()
+    .isBoolean()
+    .withMessage('isTrainee must be a boolean'),
+  
+  body('isActive')
+    .optional()
+    .isBoolean()
+    .withMessage('isActive must be a boolean')
+];
+
+export const validateChangePassword = [
+  body('currentPassword')
+    .optional()
+    .isLength({ min: 6 })
+    .withMessage('Current password must be at least 6 characters'),
+  
+  body('newPassword')
+    .isLength({ min: 8 })
+    .withMessage('New password must be at least 8 characters')
+    .matches(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)/)
+    .withMessage('New password must contain uppercase, lowercase and number')
+];
+
+// ===== SHIFT PLAN VALIDATION =====
+export const validateShiftPlan = [
+  body('name')
+    .isLength({ min: 1, max: 200 })
+    .withMessage('Name must be between 1-200 characters')
+    .trim()
+    .escape(),
+  
+  body('description')
+    .optional()
+    .isLength({ max: 1000 })
+    .withMessage('Description cannot exceed 1000 characters')
+    .trim()
+    .escape(),
+  
+  body('startDate')
+    .optional()
+    .isISO8601()
+    .withMessage('Must be a valid date (ISO format)'),
+  
+  body('endDate')
+    .optional()
+    .isISO8601()
+    .withMessage('Must be a valid date (ISO format)'),
+  
+  body('isTemplate')
+    .optional()
+    .isBoolean()
+    .withMessage('isTemplate must be a boolean'),
+  
+  body('status')
+    .optional()
+    .isIn(['draft', 'published', 'archived', 'template'])
+    .withMessage('Status must be draft, published, archived or template'),
+  
+  body('timeSlots')
+    .optional()
+    .isArray()
+    .withMessage('Time slots must be an array'),
+  
+  body('timeSlots.*.name')
+    .isLength({ min: 1, max: 100 })
+    .withMessage('Time slot name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('timeSlots.*.startTime')
+    .matches(/^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/)
+    .withMessage('Start time must be in HH:MM format'),
+  
+  body('timeSlots.*.endTime')
+    .matches(/^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/)
+    .withMessage('End time must be in HH:MM format'),
+  
+  body('timeSlots.*.description')
+    .optional()
+    .isLength({ max: 500 })
+    .withMessage('Time slot description cannot exceed 500 characters')
+    .trim()
+    .escape(),
+  
+  body('shifts')
+    .optional()
+    .isArray()
+    .withMessage('Shifts must be an array'),
+  
+  body('shifts.*.dayOfWeek')
+    .isInt({ min: 1, max: 7 })
+    .withMessage('Day of week must be between 1-7 (Monday-Sunday)'),
+  
+  body('shifts.*.timeSlotId')
+    .isUUID()
+    .withMessage('Time slot ID must be a valid UUID'),
+  
+  body('shifts.*.requiredEmployees')
+    .isInt({ min: 0 })
+    .withMessage('Required employees must be a positive integer'),
+  
+  body('shifts.*.color')
+    .optional()
+    .isHexColor()
+    .withMessage('Color must be a valid hex color')
+];
+
+export const validateShiftPlanUpdate = [
+  body('name')
+    .optional()
+    .isLength({ min: 1, max: 200 })
+    .withMessage('Name must be between 1-200 characters')
+    .trim()
+    .escape(),
+  
+  body('description')
+    .optional()
+    .isLength({ max: 1000 })
+    .withMessage('Description cannot exceed 1000 characters')
+    .trim()
+    .escape(),
+  
+  body('startDate')
+    .optional()
+    .isISO8601()
+    .withMessage('Must be a valid date (ISO format)'),
+  
+  body('endDate')
+    .optional()
+    .isISO8601()
+    .withMessage('Must be a valid date (ISO format)'),
+  
+  body('status')
+    .optional()
+    .isIn(['draft', 'published', 'archived', 'template'])
+    .withMessage('Status must be draft, published, archived or template'),
+  
+  body('timeSlots')
+    .optional()
+    .isArray()
+    .withMessage('Time slots must be an array'),
+  
+  body('shifts')
+    .optional()
+    .isArray()
+    .withMessage('Shifts must be an array')
+];
+
+export const validateCreateFromPreset = [
+  body('presetName')
+    .isLength({ min: 1 })
+    .withMessage('Preset name is required')
+    .isIn(['standardWeek', 'extendedWeek', 'weekendFocused', 'morningOnly', 'eveningOnly', 'ZEBRA_STANDARD'])
+    .withMessage('Invalid preset name'),
+  
+  body('name')
+    .isLength({ min: 1, max: 200 })
+    .withMessage('Name must be between 1-200 characters')
+    .trim()
+    .escape(),
+  
+  body('startDate')
+    .optional()
+    .isISO8601()
+    .withMessage('Must be a valid date (ISO format)'),
+  
+  body('endDate')
+    .optional()
+    .isISO8601()
+    .withMessage('Must be a valid date (ISO format)'),
+  
+  body('isTemplate')
+    .optional()
+    .isBoolean()
+    .withMessage('isTemplate must be a boolean')
+];
+
+// ===== SCHEDULED SHIFTS VALIDATION =====
+export const validateScheduledShiftUpdate = [
+  body('assignedEmployees')
+    .isArray()
+    .withMessage('assignedEmployees must be an array'),
+  
+  body('assignedEmployees.*')
+    .isUUID()
+    .withMessage('Each assigned employee must be a valid UUID'),
+  
+  body('requiredEmployees')
+    .optional()
+    .isInt({ min: 0 })
+    .withMessage('Required employees must be a positive integer')
+];
+
+// ===== SETUP VALIDATION =====
+export const validateSetupAdmin = [
+  body('firstname')
+    .isLength({ min: 1, max: 100 })
+    .withMessage('First name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('lastname')
+    .isLength({ min: 1, max: 100 })
+    .withMessage('Last name must be between 1-100 characters')
+    .trim()
+    .escape(),
+  
+  body('password')
+    .isLength({ min: 8 })
+    .withMessage('Password must be at least 8 characters')
+    .matches(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)/)
+    .withMessage('Password must contain uppercase, lowercase and number')
+];
+
+// ===== SCHEDULING VALIDATION =====
+export const validateSchedulingRequest = [
+  body('shiftPlan')
+    .isObject()
+    .withMessage('Shift plan is required'),
+  
+  body('shiftPlan.id')
+    .isUUID()
+    .withMessage('Shift plan ID must be a valid UUID'),
+  
+  body('employees')
+    .isArray({ min: 1 })
+    .withMessage('At least one employee is required'),
+  
+  body('employees.*.id')
+    .isUUID()
+    .withMessage('Each employee must have a valid UUID'),
+  
+  body('availabilities')
+    .isArray()
+    .withMessage('Availabilities must be an array'),
+  
+  body('constraints')
+    .optional()
+    .isArray()
+    .withMessage('Constraints must be an array')
+];
+
+// ===== AVAILABILITY VALIDATION =====
+export const validateAvailabilities = [
+  body('planId')
+    .isUUID()
+    .withMessage('Plan ID must be a valid UUID'),
+  
+  body('availabilities')
+    .isArray()
+    .withMessage('Availabilities must be an array'),
+  
+  body('availabilities.*.shiftId')
+    .isUUID()
+    .withMessage('Each shift ID must be a valid UUID'),
+  
+  body('availabilities.*.preferenceLevel')
+    .isInt({ min: 0, max: 2 })
+    .withMessage('Preference level must be 0 (unavailable), 1 (available), or 2 (preferred)'),
+  
+  body('availabilities.*.notes')
+    .optional()
+    .isLength({ max: 500 })
+    .withMessage('Notes cannot exceed 500 characters')
+    .trim()
+    .escape()
+];
+
+// ===== COMMON VALIDATORS =====
+export const validateId = [
+  param('id')
+    .isUUID()
+    .withMessage('Must be a valid UUID')
+];
+
+export const validateEmployeeId = [
+  param('employeeId')
+    .isUUID()
+    .withMessage('Must be a valid UUID')
+];
+
+export const validatePlanId = [
+  param('planId')
+    .isUUID()
+    .withMessage('Must be a valid UUID')
+];
+
+export const validatePagination = [
+  query('page')
+    .optional()
+    .isInt({ min: 1 })
+    .withMessage('Page must be a positive integer'),
+  
+  query('limit')
+    .optional()
+    .isInt({ min: 1, max: 100 })
+    .withMessage('Limit must be between 1-100'),
+  
+  query('includeInactive')
+    .optional()
+    .isBoolean()
+    .withMessage('includeInactive must be a boolean')
+];
+
+// ===== MIDDLEWARE TO CHECK VALIDATION RESULTS =====
+export const handleValidationErrors = (req: Request, res: Response, next: NextFunction) => {
+  const errors = validationResult(req);
+  
+  if (!errors.isEmpty()) {
+    const errorMessages = errors.array().map(error => ({
+      field: error.type === 'field' ? error.path : error.type,
+      message: error.msg,
+      value: error.msg
+    }));
+    
+    return res.status(400).json({
+      error: 'Validation failed',
+      details: errorMessages
+    });
+  }
+  
+  next();
+};

backend/src/models/defaults/employeeDefaults.ts

@@ -102,7 +102,6 @@ export const AVAILABILITY_PREFERENCES = {
 } as const;
 
 // Default availability for new employees (all shifts unavailable as level 3)
-// UPDATED: Now uses shiftId instead of timeSlotId + dayOfWeek
 export function createDefaultAvailabilities(employeeId: string, planId: string, shiftIds: string[]): Omit<EmployeeAvailability, 'id'>[] {
   const availabilities: Omit<EmployeeAvailability, 'id'>[] = [];
   
@@ -120,7 +119,6 @@ export function createDefaultAvailabilities(employeeId: string, planId: string,
 }
 
 // Create complete manager availability for all days (default: only Mon-Tue available)
-// NOTE: This function might need revision based on new schema requirements
 export function createManagerDefaultSchedule(managerId: string, planId: string, timeSlotIds: string[]): Omit<ManagerAvailability, 'id'>[] {
   const assignments: Omit<ManagerAvailability, 'id'>[] = [];
   

backend/src/python-scripts/progress_data/run_20251021_111611_693047_success.json

@@ -1,32 +0,0 @@
-{
-  "timestamp": "2025-10-21T11:16:11.693081",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.0218085,
-    "constraintsAdded": 217,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.00886988639831543,
-      "objective": 1050.0,
-      "bound": 2100.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.009304285049438477,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 2
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 217,
-    "solve_time": 0.0218085,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_111616_813035_success.json

@@ -1,38 +0,0 @@
-{
-  "timestamp": "2025-10-21T11:16:16.813066",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.0158702,
-    "constraintsAdded": 217,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.008541107177734375,
-      "objective": 1050.0,
-      "bound": 2000.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.00941777229309082,
-      "objective": 1250.0,
-      "bound": 1300.0,
-      "solution_count": 2
-    },
-    {
-      "timestamp": 0.009499549865722656,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 3
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 217,
-    "solve_time": 0.0158702,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_143406_393082_success.json

@@ -1,38 +0,0 @@
-{
-  "timestamp": "2025-10-21T14:34:06.393151",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.046477700000000004,
-    "constraintsAdded": 217,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.04335761070251465,
-      "objective": 1050.0,
-      "bound": 2100.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.04459857940673828,
-      "objective": 1250.0,
-      "bound": 1700.0,
-      "solution_count": 2
-    },
-    {
-      "timestamp": 0.04603719711303711,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 3
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 217,
-    "solve_time": 0.046477700000000004,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_143710_936443_success.json

@@ -1,44 +0,0 @@
-{
-  "timestamp": "2025-10-21T14:37:10.936471",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.022602300000000002,
-    "constraintsAdded": 217,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.008664369583129883,
-      "objective": 1050.0,
-      "bound": 1300.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.008890628814697266,
-      "objective": 1150.0,
-      "bound": 1300.0,
-      "solution_count": 2
-    },
-    {
-      "timestamp": 0.009119987487792969,
-      "objective": 1250.0,
-      "bound": 1300.0,
-      "solution_count": 3
-    },
-    {
-      "timestamp": 0.009514808654785156,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 4
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 217,
-    "solve_time": 0.022602300000000002,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_143804_517155_success.json

@@ -1,38 +0,0 @@
-{
-  "timestamp": "2025-10-21T14:38:04.517181",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.017061200000000002,
-    "constraintsAdded": 217,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.008075952529907227,
-      "objective": 1000.0,
-      "bound": 1300.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.008380889892578125,
-      "objective": 1200.0,
-      "bound": 1300.0,
-      "solution_count": 2
-    },
-    {
-      "timestamp": 0.008938789367675781,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 3
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 217,
-    "solve_time": 0.017061200000000002,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_144000_354302_failure.json

@@ -1,19 +0,0 @@
-{
-  "timestamp": "2025-10-21T14:40:00.354343",
-  "success": false,
-  "metadata": {
-    "solveTime": 0.0013928,
-    "constraintsAdded": 248,
-    "variablesCreated": 99,
-    "optimal": false
-  },
-  "progress": [],
-  "solution_summary": {
-    "assignments_count": 0,
-    "violations_count": 0,
-    "variables_count": 99,
-    "constraints_count": 248,
-    "solve_time": 0.0013928,
-    "optimal": false
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_144301_616086_failure.json

@@ -1,19 +0,0 @@
-{
-  "timestamp": "2025-10-21T14:43:01.616117",
-  "success": false,
-  "metadata": {
-    "solveTime": 0.0009529,
-    "constraintsAdded": 230,
-    "variablesCreated": 99,
-    "optimal": false
-  },
-  "progress": [],
-  "solution_summary": {
-    "assignments_count": 0,
-    "violations_count": 0,
-    "variables_count": 99,
-    "constraints_count": 230,
-    "solve_time": 0.0009529,
-    "optimal": false
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_144340_972746_failure.json

@@ -1,19 +0,0 @@
-{
-  "timestamp": "2025-10-21T14:43:40.972769",
-  "success": false,
-  "metadata": {
-    "solveTime": 0.0009025000000000001,
-    "constraintsAdded": 230,
-    "variablesCreated": 99,
-    "optimal": false
-  },
-  "progress": [],
-  "solution_summary": {
-    "assignments_count": 0,
-    "violations_count": 0,
-    "variables_count": 99,
-    "constraints_count": 230,
-    "solve_time": 0.0009025000000000001,
-    "optimal": false
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_151530_967914_failure.json

@@ -1,19 +0,0 @@
-{
-  "timestamp": "2025-10-21T15:15:30.967943",
-  "success": false,
-  "metadata": {
-    "solveTime": 0.0009660000000000001,
-    "constraintsAdded": 230,
-    "variablesCreated": 99,
-    "optimal": false
-  },
-  "progress": [],
-  "solution_summary": {
-    "assignments_count": 0,
-    "violations_count": 0,
-    "variables_count": 99,
-    "constraints_count": 230,
-    "solve_time": 0.0009660000000000001,
-    "optimal": false
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_151539_908306_failure.json

@@ -1,19 +0,0 @@
-{
-  "timestamp": "2025-10-21T15:15:39.908329",
-  "success": false,
-  "metadata": {
-    "solveTime": 0.0009183,
-    "constraintsAdded": 230,
-    "variablesCreated": 99,
-    "optimal": false
-  },
-  "progress": [],
-  "solution_summary": {
-    "assignments_count": 0,
-    "violations_count": 0,
-    "variables_count": 99,
-    "constraints_count": 230,
-    "solve_time": 0.0009183,
-    "optimal": false
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_151728_688699_success.json

@@ -1,56 +0,0 @@
-{
-  "timestamp": "2025-10-21T15:17:28.688727",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.0175048,
-    "constraintsAdded": 230,
-    "variablesCreated": 99,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.0076940059661865234,
-      "objective": 1150.0,
-      "bound": 2650.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.008573293685913086,
-      "objective": 1200.0,
-      "bound": 1400.0,
-      "solution_count": 2
-    },
-    {
-      "timestamp": 0.00871133804321289,
-      "objective": 1250.0,
-      "bound": 1400.0,
-      "solution_count": 3
-    },
-    {
-      "timestamp": 0.008805990219116211,
-      "objective": 1300.0,
-      "bound": 1400.0,
-      "solution_count": 4
-    },
-    {
-      "timestamp": 0.00890493392944336,
-      "objective": 1350.0,
-      "bound": 1400.0,
-      "solution_count": 5
-    },
-    {
-      "timestamp": 0.009298324584960938,
-      "objective": 1400.0,
-      "bound": 1400.0,
-      "solution_count": 6
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 16,
-    "violations_count": 0,
-    "variables_count": 99,
-    "constraints_count": 230,
-    "solve_time": 0.0175048,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_151919_785777_success.json

@@ -1,56 +0,0 @@
-{
-  "timestamp": "2025-10-21T15:19:19.785803",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.014216000000000001,
-    "constraintsAdded": 228,
-    "variablesCreated": 99,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.008774042129516602,
-      "objective": 1200.0,
-      "bound": 2850.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.009451627731323242,
-      "objective": 1250.0,
-      "bound": 1450.0,
-      "solution_count": 2
-    },
-    {
-      "timestamp": 0.009568452835083008,
-      "objective": 1300.0,
-      "bound": 1450.0,
-      "solution_count": 3
-    },
-    {
-      "timestamp": 0.009636402130126953,
-      "objective": 1350.0,
-      "bound": 1450.0,
-      "solution_count": 4
-    },
-    {
-      "timestamp": 0.009870052337646484,
-      "objective": 1400.0,
-      "bound": 1450.0,
-      "solution_count": 5
-    },
-    {
-      "timestamp": 0.009946584701538086,
-      "objective": 1450.0,
-      "bound": 1450.0,
-      "solution_count": 6
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 17,
-    "violations_count": 0,
-    "variables_count": 99,
-    "constraints_count": 228,
-    "solve_time": 0.014216000000000001,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_165813_438327_success.json

@@ -1,32 +0,0 @@
-{
-  "timestamp": "2025-10-21T16:58:13.438358",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.012495000000000001,
-    "constraintsAdded": 218,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.008534908294677734,
-      "objective": 1050.0,
-      "bound": 2100.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.009073495864868164,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 2
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 218,
-    "solve_time": 0.012495000000000001,
-    "optimal": true
-  }
-}

backend/src/python-scripts/progress_data/run_20251021_165837_184732_success.json

@@ -1,32 +0,0 @@
-{
-  "timestamp": "2025-10-21T16:58:37.184763",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.0245485,
-    "constraintsAdded": 218,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.009514808654785156,
-      "objective": 1050.0,
-      "bound": 2100.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.010115385055541992,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 2
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 218,
-    "solve_time": 0.0245485,
-    "optimal": true
-  }
-}

backend/src/python-scripts/run_20251021_105426_failure.json

@@ -1,32 +0,0 @@
-{
-  "timestamp": "2025-10-21T10:54:26.093544",
-  "success": false,
-  "metadata": {
-    "solveTime": 0,
-    "constraintsAdded": 0,
-    "variablesCreated": 0,
-    "optimal": false
-  },
-  "progress": [],
-  "solution_summary": {
-    "assignments_count": 0,
-    "violations_count": 1,
-    "variables_count": 0,
-    "constraints_count": 0,
-    "solve_time": 0,
-    "optimal": false
-  },
-  "full_result": {
-    "assignments": [],
-    "violations": [
-      "Error: 'SolutionCallback' object has no attribute 'HasObjective'"
-    ],
-    "success": false,
-    "metadata": {
-      "solveTime": 0,
-      "constraintsAdded": 0,
-      "variablesCreated": 0,
-      "optimal": false
-    }
-  }
-}

backend/src/python-scripts/run_20251021_105936_failure.json

@@ -1,19 +0,0 @@
-{
-  "timestamp": "2025-10-21T10:59:36.646855",
-  "success": false,
-  "metadata": {
-    "solveTime": 0,
-    "constraintsAdded": 0,
-    "variablesCreated": 0,
-    "optimal": false
-  },
-  "progress": [],
-  "solution_summary": {
-    "assignments_count": 0,
-    "violations_count": 1,
-    "variables_count": 0,
-    "constraints_count": 0,
-    "solve_time": 0,
-    "optimal": false
-  }
-}

backend/src/python-scripts/run_20251021_110336_success.json

@@ -1,38 +0,0 @@
-{
-  "timestamp": "2025-10-21T11:03:36.697986",
-  "success": true,
-  "metadata": {
-    "solveTime": 0.025875500000000003,
-    "constraintsAdded": 217,
-    "variablesCreated": 90,
-    "optimal": true
-  },
-  "progress": [
-    {
-      "timestamp": 0.008769989013671875,
-      "objective": 1050.0,
-      "bound": 2000.0,
-      "solution_count": 1
-    },
-    {
-      "timestamp": 0.009685516357421875,
-      "objective": 1250.0,
-      "bound": 1700.0,
-      "solution_count": 2
-    },
-    {
-      "timestamp": 0.010709047317504883,
-      "objective": 1300.0,
-      "bound": 1300.0,
-      "solution_count": 3
-    }
-  ],
-  "solution_summary": {
-    "assignments_count": 15,
-    "violations_count": 0,
-    "variables_count": 90,
-    "constraints_count": 217,
-    "solve_time": 0.025875500000000003,
-    "optimal": true
-  }
-}

backend/src/routes/auth.ts

@@ -8,12 +8,13 @@ import {
   validateToken 
 } from '../controllers/authController.js';
 import { authMiddleware } from '../middleware/auth.js';
+import { validateLogin, validateRegister, handleValidationErrors } from '../middleware/validation.js';
 
 const router = express.Router();
 
 // Public routes
-router.post('/login', login);
-router.post('/register', register);
+router.post('/login', validateLogin, handleValidationErrors, login);
+router.post('/register', validateRegister, handleValidationErrors, register);
 router.get('/validate', validateToken);
 
 // Protected routes (require authentication)

backend/src/routes/employees.ts

@@ -1,4 +1,3 @@
-// backend/src/routes/employees.ts
 import express from 'express';
 import { authMiddleware, requireRole } from '../middleware/auth.js';
 import {
@@ -12,6 +11,16 @@ import {
   changePassword,
   updateLastLogin
 } from '../controllers/employeeController.js';
+import { 
+  handleValidationErrors, 
+  validateEmployee, 
+  validateEmployeeUpdate, 
+  validateChangePassword,
+  validateId,
+  validateEmployeeId,
+  validateAvailabilities,
+  validatePagination 
+} from '../middleware/validation.js';
 
 const router = express.Router();
 
@@ -19,16 +28,18 @@ const router = express.Router();
 router.use(authMiddleware);
 
 // Employee CRUD Routes
-router.get('/', authMiddleware, getEmployees);
-router.get('/:id', requireRole(['admin', 'instandhalter']), getEmployee);
-router.post('/', requireRole(['admin']), createEmployee);
-router.put('/:id', requireRole(['admin']), updateEmployee);
-router.delete('/:id', requireRole(['admin']), deleteEmployee);
-router.put('/:id/password', authMiddleware, changePassword);
-router.put('/:id/last-login', authMiddleware, updateLastLogin);
+router.get('/', validatePagination, handleValidationErrors, getEmployees);
+router.get('/:id', validateId, handleValidationErrors, requireRole(['admin', 'maintenance']), getEmployee);
+router.post('/', validateEmployee, handleValidationErrors, requireRole(['admin']), createEmployee);
+router.put('/:id', validateId, validateEmployeeUpdate, handleValidationErrors, requireRole(['admin', 'maintenance']), updateEmployee);
+router.delete('/:id', validateId, handleValidationErrors, requireRole(['admin']), deleteEmployee);
+
+// Password & Login Routes
+router.put('/:id/password', validateId, validateChangePassword, handleValidationErrors, changePassword);
+router.put('/:id/last-login', validateId, handleValidationErrors, updateLastLogin);
 
 // Availability Routes
-router.get('/:employeeId/availabilities', authMiddleware, getAvailabilities);
-router.put('/:employeeId/availabilities', authMiddleware, updateAvailabilities);
+router.get('/:employeeId/availabilities', validateEmployeeId, handleValidationErrors, getAvailabilities);
+router.put('/:employeeId/availabilities', validateEmployeeId, validateAvailabilities, handleValidationErrors, updateAvailabilities);
 
 export default router;

backend/src/routes/scheduledShifts.ts

@@ -1,4 +1,3 @@
-// backend/src/routes/scheduledShifts.ts
 import express from 'express';
 import { authMiddleware, requireRole } from '../middleware/auth.js';
 import { 
@@ -8,23 +7,21 @@ import {
   getScheduledShiftsFromPlan,
   updateScheduledShift
 } from '../controllers/shiftPlanController.js';
+import { 
+  validateId, 
+  validatePlanId, 
+  validateScheduledShiftUpdate, 
+  handleValidationErrors 
+} from '../middleware/validation.js';
 
 const router = express.Router();
 
 router.use(authMiddleware);
 
-
-router.post('/:id/generate-shifts', requireRole(['admin', 'instandhalter']), generateScheduledShiftsForPlan);
-
-router.post('/:id/regenerate-shifts', requireRole(['admin', 'instandhalter']), regenerateScheduledShifts);
-
-// GET all scheduled shifts for a plan
-router.get('/plan/:planId', authMiddleware, getScheduledShiftsFromPlan);
-
-// GET specific scheduled shift
-router.get('/:id', authMiddleware, getScheduledShift);
-
-// UPDATE scheduled shift
-router.put('/:id', authMiddleware, updateScheduledShift);
+router.post('/:id/generate-shifts', validateId, handleValidationErrors, requireRole(['admin', 'maintenance']), generateScheduledShiftsForPlan);
+router.post('/:id/regenerate-shifts', validateId, handleValidationErrors, requireRole(['admin', 'maintenance']), regenerateScheduledShifts);
+router.get('/plan/:planId', validatePlanId, handleValidationErrors, getScheduledShiftsFromPlan);
+router.get('/:id', validateId, handleValidationErrors, getScheduledShift);
+router.put('/:id', validateId, validateScheduledShiftUpdate, handleValidationErrors, updateScheduledShift);
 
 export default router;

backend/src/routes/scheduling.ts

@@ -1,9 +1,10 @@
 import express from 'express';
 import { SchedulingService } from '../services/SchedulingService.js';
+import { validateSchedulingRequest, handleValidationErrors } from '../middleware/validation.js';
 
 const router = express.Router();
 
-router.post('/generate-schedule', async (req, res) => {
+router.post('/generate-schedule', validateSchedulingRequest, handleValidationErrors, async (req: express.Request, res: express.Response) => {
   try {
     const { shiftPlan, employees, availabilities, constraints } = req.body;
     
@@ -14,18 +15,6 @@ router.post('/generate-schedule', async (req, res) => {
       constraintCount: constraints?.length
     });
 
-    // Validate required data
-    if (!shiftPlan || !employees || !availabilities) {
-      return res.status(400).json({ 
-        error: 'Missing required data',
-        details: {
-          shiftPlan: !!shiftPlan,
-          employees: !!employees,
-          availabilities: !!availabilities
-        }
-      });
-    }
-
     const scheduler = new SchedulingService();
     const result = await scheduler.generateOptimalSchedule({
       shiftPlan,

backend/src/routes/setup.ts

@@ -1,11 +1,10 @@
-// backend/src/routes/setup.ts
 import express from 'express';
-import bcrypt from 'bcryptjs';
 import { checkSetupStatus, setupAdmin } from '../controllers/setupController.js';
+import { validateSetupAdmin, handleValidationErrors } from '../middleware/validation.js';
 
 const router = express.Router();
 
 router.get('/status', checkSetupStatus);
-router.post('/admin', setupAdmin);
+router.post('/admin', validateSetupAdmin, handleValidationErrors, setupAdmin);
 
 export default router;

backend/src/routes/shiftPlans.ts

@@ -1,4 +1,3 @@
-// backend/src/routes/shiftPlans.ts
 import express from 'express';
 import { authMiddleware, requireRole } from '../middleware/auth.js';
 import { 
@@ -10,32 +9,25 @@ import {
   createFromPreset,
   clearAssignments
 } from '../controllers/shiftPlanController.js';
+import { 
+  validateShiftPlan, 
+  validateShiftPlanUpdate, 
+  validateCreateFromPreset, 
+  handleValidationErrors, 
+  validateId 
+} from '../middleware/validation.js';
 
 const router = express.Router();
 
 router.use(authMiddleware);
 
 // Combined routes for both shift plans and templates
-
-// GET all shift plans (including templates)
-router.get('/' , authMiddleware, getShiftPlans);
-
-// GET specific shift plan or template
-router.get('/:id', authMiddleware, getShiftPlan);
-
-// POST create new shift plan
-router.post('/', requireRole(['admin', 'instandhalter']), createShiftPlan);
-
-// POST create new plan from preset
-router.post('/from-preset', requireRole(['admin', 'instandhalter']), createFromPreset);
-
-// PUT update shift plan or template
-router.put('/:id', requireRole(['admin', 'instandhalter']), updateShiftPlan);
-
-// DELETE shift plan or template
-router.delete('/:id', requireRole(['admin', 'instandhalter']), deleteShiftPlan);
-
-// POST clear assignments and reset to draft
-router.post('/:id/clear-assignments', requireRole(['admin', 'instandhalter']), clearAssignments);
+router.get('/', getShiftPlans);
+router.get('/:id', validateId, handleValidationErrors, getShiftPlan);
+router.post('/', validateShiftPlan, handleValidationErrors, requireRole(['admin', 'maintenance']), createShiftPlan);
+router.post('/from-preset', validateCreateFromPreset, handleValidationErrors, requireRole(['admin', 'maintenance']), createFromPreset);
+router.put('/:id', validateId, validateShiftPlanUpdate, handleValidationErrors, requireRole(['admin', 'maintenance']), updateShiftPlan);
+router.delete('/:id', validateId, handleValidationErrors, requireRole(['admin', 'maintenance']), deleteShiftPlan);
+router.post('/:id/clear-assignments', validateId, handleValidationErrors, requireRole(['admin', 'maintenance']), clearAssignments);
 
 export default router;

backend/src/scripts/initializeDatabase.ts

@@ -8,7 +8,30 @@ const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 
 export async function initializeDatabase(): Promise<void> {
-  const schemaPath = path.join(__dirname, '../database/schema.sql');
+  const possiblePaths = [
+    path.join(__dirname, '../database/schema.sql'),
+    path.join(__dirname, '../../database/schema.sql'),
+    path.join(process.cwd(), 'database/schema.sql'),
+    path.join(process.cwd(), 'src/database/schema.sql'),
+    path.join(process.cwd(), 'dist/database/schema.sql')
+  ];
+
+  let schemaPath: string | null = null;
+
+  for (const p of possiblePaths) {
+    if (fs.existsSync(p)) {
+      schemaPath = p;
+      break;
+    }
+  }
+
+  if (!schemaPath) {
+    throw new Error(
+      `❌ schema.sql not found in any of the tested paths:\n${possiblePaths.join('\n')}`
+    );
+  }
+
+  console.log(`✅ Using schema at: ${schemaPath}`);
   const schema = fs.readFileSync(schemaPath, 'utf8');
   
   try {

backend/src/scripts/verify-python.js

@@ -0,0 +1,26 @@
+import { spawn } from 'child_process';
+
+export function runPythonScript(scriptPath, args = []) {
+  return new Promise((resolve, reject) => {
+    const pythonProcess = spawn('python', [scriptPath, ...args]);
+    
+    let stdout = '';
+    let stderr = '';
+
+    pythonProcess.stdout.on('data', (data) => {
+      stdout += data.toString();
+    });
+
+    pythonProcess.stderr.on('data', (data) => {
+      stderr += data.toString();
+    });
+
+    pythonProcess.on('close', (code) => {
+      if (code === 0) {
+        resolve(stdout);
+      } else {
+        reject(new Error(`Python script exited with code ${code}: ${stderr}`));
+      }
+    });
+  });
+}

backend/src/server.ts

@@ -1,7 +1,10 @@
 // backend/src/server.ts
 import express from 'express';
-import cors from 'cors';
+import path from 'path';
+import { fileURLToPath } from 'url';
 import { initializeDatabase } from './scripts/initializeDatabase.js';
+import fs from 'fs';
+import helmet from 'helmet';
 
 // Route imports
 import authRoutes from './routes/auth.js';
@@ -10,87 +13,197 @@ import shiftPlanRoutes from './routes/shiftPlans.js';
 import setupRoutes from './routes/setup.js';
 import scheduledShifts from './routes/scheduledShifts.js';
 import schedulingRoutes from './routes/scheduling.js';
+import { authLimiter, apiLimiter } from './middleware/rateLimit.js';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
 
 const app = express();
 const PORT = 3002;
+const isDevelopment = process.env.NODE_ENV === 'development';
 
-// CORS und Middleware
-app.use(cors());
+app.set('trust proxy', true);
+
+// Security configuration
+if (process.env.NODE_ENV === 'production') {
+  console.info('Checking for JWT_SECRET');
+  const JWT_SECRET = process.env.JWT_SECRET;
+  if (!JWT_SECRET || JWT_SECRET === 'your-secret-key-please-change') {
+    console.error('❌ Fatal: JWT_SECRET not set or using default value');
+    process.exit(1);
+  }
+}
+
+// Security headers
+app.use(helmet({
+  contentSecurityPolicy: {
+    directives: {
+      defaultSrc: ["'self'"],
+      scriptSrc: ["'self'", "'unsafe-inline'"],
+      styleSrc: ["'self'", "'unsafe-inline'"],
+      imgSrc: ["'self'", "data:", "https:"],
+      connectSrc: ["'self'"],
+      fontSrc: ["'self'"],
+      objectSrc: ["'none'"],
+      mediaSrc: ["'self'"],
+      frameSrc: ["'none'"],
+    },
+  },
+  hsts: false,
+  crossOriginEmbedderPolicy: false
+}));
+
+// Additional security headers
+app.use((req, res, next) => {
+  res.setHeader('X-Content-Type-Options', 'nosniff');
+  res.setHeader('X-Frame-Options', 'DENY');
+  res.setHeader('X-XSS-Protection', '1; mode=block');
+  next();
+});
+
+// Middleware
 app.use(express.json());
 
+// Rate limiting - weniger restriktiv in Development
+if (process.env.NODE_ENV === 'production') {
+  app.use('/api/', apiLimiter);
+} else {
+  console.log('🔧 Development: Rate limiting relaxed');
+}
+
 // API Routes
 app.use('/api/setup', setupRoutes);
-app.use('/api/auth', authRoutes);
+app.use('/api/auth', authLimiter, authRoutes);
 app.use('/api/employees', employeeRoutes);
 app.use('/api/shift-plans', shiftPlanRoutes);
 app.use('/api/scheduled-shifts', scheduledShifts);
 app.use('/api/scheduling', schedulingRoutes);
 
-// Error handling middleware should come after routes
-app.use((err: any, req: express.Request, res: express.Response, next: express.NextFunction) => {
-  console.error('Unhandled error:', err);
-  res.status(500).json({ error: 'Internal server error' });
-});
-
-// 404 handler for API routes
-app.use('/api/*', (req, res) => {
-  res.status(404).json({ error: 'API endpoint not found' });
-});
-
 // Health route
-app.get('/api/health', (req: any, res: any) => {
+app.get('/api/health', (req: express.Request, res: express.Response) => {
   res.json({ 
     status: 'OK', 
     message: 'Backend läuft!',
-    timestamp: new Date().toISOString()
+    timestamp: new Date().toISOString(),
+    mode: process.env.NODE_ENV || 'development'
   });
 });
 
-// Setup status route (additional endpoint for clarity)
-app.get('/api/initial-setup', async (req: any, res: any) => {
+// 🆕 IMPROVED STATIC FILE SERVING
+const findFrontendBuildPath = (): string | null => {
+  const possiblePaths = [
+    // Production path (Docker)
+    '/app/frontend-build',
+    // Development paths
+    path.resolve(__dirname, '../../frontend/dist'),
+    path.resolve(__dirname, '../../frontend-build'),
+    path.resolve(process.cwd(), '../frontend/dist'),
+    path.resolve(process.cwd(), 'frontend-build'),
+  ];
+
+  for (const testPath of possiblePaths) {
     try {
-    const { db } = await import('./services/databaseService.js');
-    
-    const adminExists = await db.get<{ 'COUNT(*)': number }>(
-      'SELECT COUNT(*) FROM employees WHERE role = ?',
-      ['admin']
-    );
-
-    res.json({
-      needsInitialSetup: !adminExists || adminExists['COUNT(*)'] === 0
-    });
-  } catch (error) {
-    console.error('Error checking initial setup:', error);
-    res.status(500).json({ error: 'Internal server error' });
+      if (fs.existsSync(testPath)) {
+        const indexPath = path.join(testPath, 'index.html');
+        if (fs.existsSync(indexPath)) {
+          console.log('✅ Found frontend build at:', testPath);
+          return testPath;
         }
+      }
+    } catch (error) {
+      // Silent catch - just try next path
+    }
+  }
+  return null;
+};
+
+const frontendBuildPath = findFrontendBuildPath();
+
+if (frontendBuildPath) {
+  app.use(express.static(frontendBuildPath));
+  console.log('✅ Static file serving configured');
+} else {
+  console.log(isDevelopment ?
+    '🔧 Development: Frontend served by Vite dev server (localhost:3003)' :
+    '❌ Production: No frontend build found'
+  );
+}
+
+// Root route
+app.get('/', (req, res) => {
+  if (!frontendBuildPath) {
+    if (isDevelopment) {
+      return res.redirect('http://localhost:3003');
+    }
+    return res.status(500).send('Frontend build not found');
+  }
+  
+  const indexPath = path.join(frontendBuildPath, 'index.html');
+  res.sendFile(indexPath);
+});
+
+// Client-side routing fallback
+app.get('*', (req, res) => {
+  if (req.path.startsWith('/api/')) {
+    return res.status(404).json({ error: 'API endpoint not found' });
+  }
+  
+  if (!frontendBuildPath) {
+    if (isDevelopment) {
+      return res.redirect(`http://localhost:3003${req.path}`);
+    }
+    return res.status(500).json({ error: 'Frontend application not available' });
+  }
+  
+  const indexPath = path.join(frontendBuildPath, 'index.html');
+  res.sendFile(indexPath);
+});
+
+// Error handling
+app.use((err: any, req: express.Request, res: express.Response, next: express.NextFunction) => {
+  console.error('Error:', err);
+  
+  if (process.env.NODE_ENV === 'production') {
+    res.status(500).json({ 
+      error: 'Internal server error',
+      message: 'Something went wrong'
+    });
+  } else {
+    res.status(500).json({ 
+      error: 'Internal server error',
+      message: err.message,
+      stack: err.stack
+    });
+  }
+});
+
+// 404 handling
+app.use('*', (req, res) => {
+  res.status(404).json({ error: 'Endpoint not found' });
 });
 
 // Initialize the application
 const initializeApp = async () => {
   try {
-    // Initialize database with base schema
     await initializeDatabase();
-    //console.log('✅ Database initialized successfully');
-    
-    // Apply any pending migrations
     const { applyMigration } = await import('./scripts/applyMigration.js');
     await applyMigration();
-    //console.log('✅ Database migrations applied');
 
-    // Start server only after successful initialization
     app.listen(PORT, () => {
-      console.log('🎉 BACKEND STARTED SUCCESSFULLY!');
+      console.log('🎉 APPLICATION STARTED SUCCESSFULLY!');
       console.log(`📍 Port: ${PORT}`);
-      console.log(`📍 Health: http://localhost:${PORT}/api/health`);
-      console.log('');
-      console.log(`🔧 Setup ready at: http://localhost:${PORT}/api/setup/status`);
-      console.log('📝 Create your admin account on first launch');
+      console.log(`📍 Mode: ${process.env.NODE_ENV || 'development'}`);
+      if (frontendBuildPath) {
+        console.log(`📍 Frontend: http://localhost:${PORT}`);
+      } else if (isDevelopment) {
+        console.log(`📍 Frontend (Vite): http://localhost:3003`);
+      }
+      console.log(`📍 API: http://localhost:${PORT}/api`);
     });
   } catch (error) {
     console.error('❌ Error during initialization:', error);
-    process.exit(1); // Exit if initialization fails
+    process.exit(1);
   }
 };
 
-// Start the application
 initializeApp();

backend/src/services/SchedulingService.ts

@@ -2,8 +2,7 @@
 import { Worker } from 'worker_threads';
 import path from 'path';
 import { fileURLToPath } from 'url';
-import { Employee, EmployeeAvailability } from '../models/Employee.js';
-import { ShiftPlan, ScheduledShift } from '../models/ShiftPlan.js';
+import { ShiftPlan } from '../models/ShiftPlan.js';
 import { ScheduleRequest, ScheduleResult, Availability, Constraint } from '../models/scheduling.js';
 
 const __filename = fileURLToPath(import.meta.url);

backend/src/services/databaseService.ts

@@ -1,10 +1,19 @@
+// backend/src/services/databaseService
 import sqlite3 from 'sqlite3';
 import path from 'path';
 import { fileURLToPath } from 'url';
+import fs from 'fs';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
-const dbPath = path.join(__dirname, '../../database/schichtplan.db');
+
+const dbPath = process.env.DB_PATH || '/app/data/schichtplan.db';
+
+// Stelle sicher, dass das Verzeichnis existiert
+const dbDir = path.dirname(dbPath);
+if (!fs.existsSync(dbDir)) {
+  fs.mkdirSync(dbDir, { recursive: true });
+}
 
 class Database {
   private db: sqlite3.Database;

backend/src/workers/scheduler-worker.ts

@@ -2,8 +2,8 @@
 import { parentPort, workerData } from 'worker_threads';
 import { CPModel, CPSolver } from './cp-sat-wrapper.js';
 import { ShiftPlan, Shift } from '../models/ShiftPlan.js';
-import { Employee, EmployeeAvailability } from '../models/Employee.js';
-import { Availability, Constraint, Violation, SolverOptions, Solution, Assignment } from '../models/scheduling.js';
+import { Employee } from '../models/Employee.js';
+import { Availability, Constraint } from '../models/scheduling.js';
 
 interface WorkerData {
   shiftPlan: ShiftPlan;

backend/tsconfig.json

@@ -1,19 +1,22 @@
-// backend/tsconfig.json
 {
   "compilerOptions": {
     "target": "ES2022",
     "module": "NodeNext",
     "moduleResolution": "NodeNext",
-    "allowSyntheticDefaultImports": true,
-    "esModuleInterop": true,
-    "allowJs": true,
     "outDir": "./dist",
     "rootDir": "./src",
     "strict": true,
+    "esModuleInterop": true,
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
-    "resolveJsonModule": true
+    "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true
   },
-  "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist"]
+  "include": [
+    "src/**/*"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist"
+  ]
 }

docker-compose.yml

@@ -1,18 +1,22 @@
 version: '3.8'
+
 services:
-  frontend:
-    build: ./frontend
-    ports:
-      - "80:80"
-    depends_on:
-      - backend
-
-  backend:
-    build: ./backend
-    ports:
-      - "3001:3001"
+  schichtplaner:
+    container_name: schichtplaner
+    image: ghcr.io/donpat1to/schichtenplaner:v1.0.0
     environment:
-      - DATABASE_URL=file:./dev.db
-      - JWT_SECRET=your-secret-key
+      - NODE_ENV=production
+      - JWT_SECRET=${JWT_SECRET:-your-secret-key-please-change}
+    ports:
+      - "3002:3002"
+    volumes:
+      - app_data:/app/data
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3002/api/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
 
-  # Später: Database service hinzufügen
+volumes:
+  app_data:

docker-init.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+set -e
+
+echo "🚀 Container Initialisierung gestartet..."
+
+# Funktion zum Generieren eines sicheren Secrets
+generate_secret() {
+    length=$1
+    tr -dc 'A-Za-z0-9!@#$%^&*()_+-=' < /dev/urandom | head -c $length
+}
+
+# Prüfe ob .env existiert
+if [ ! -f /app/.env ]; then
+    echo "📝 Erstelle .env Datei..."
+    
+    # Verwende vorhandenes JWT_SECRET oder generiere ein neues
+    if [ -z "$JWT_SECRET" ] || [ "$JWT_SECRET" = "your-secret-key-please-change" ]; then
+        export JWT_SECRET=$(generate_secret 64)
+        echo "🔑 Automatisch sicheres JWT Secret generiert"
+    else
+        echo "🔑 Verwende vorhandenes JWT Secret aus Umgebungsvariable"
+    fi
+    
+    # Erstelle .env aus Template mit envsubst
+    envsubst < /app/.env.template > /app/.env
+    echo "✅ .env Datei erstellt"
+    
+else
+    echo "ℹ️  .env Datei existiert bereits"
+    
+    # Wenn .env existiert, aber JWT_SECRET Umgebungsvariable gesetzt ist, aktualisiere sie
+    if [ -n "$JWT_SECRET" ] && [ "$JWT_SECRET" != "your-secret-key-please-change" ]; then
+        echo "🔑 Aktualisiere JWT Secret in .env Datei"
+        # Aktualisiere nur das JWT_SECRET in der .env Datei
+        sed -i "s/^JWT_SECRET=.*/JWT_SECRET=$JWT_SECRET/" /app/.env
+    fi
+fi
+
+# Validiere dass JWT_SECERT nicht der Standardwert ist
+if grep -q "JWT_SECRET=your-secret-key-please-change" /app/.env; then
+    echo "❌ FEHLER: Standard JWT Secret in .env gefunden!"
+    echo "❌ Bitte setzen Sie JWT_SECRET Umgebungsvariable"
+    exit 1
+fi
+
+# Setze sichere Berechtigungen
+chmod 600 /app/.env
+
+echo "🔧 Starte Anwendung..."
+exec "$@"

ecosystem.config.cjs

@@ -0,0 +1,17 @@
+// ecosystem.config.cjs
+module.exports = {
+  apps: [{
+    name: 'schichtplan-app',
+    script: './dist/server.js',
+    instances: 1,
+    env: {
+      NODE_ENV: 'production',
+      PORT: 3002,
+      FRONTEND_BUILD_PATH: './frontend-build'
+    },
+    error_file: './logs/err.log',
+    out_file: './logs/out.log',
+    log_file: './logs/combined.log',
+    time: true
+  }]
+};

frontend/.gitignore

@@ -1,45 +0,0 @@
-# Dependencies
-node_modules/
-/.pnp
-.pnp.js
-
-# Testing
-/coverage
-
-# Production
-/build
-
-# Misc
-.DS_Store
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-.env
-
-# Logs
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# IDEs
-.vscode/
-.idea/
-*.swp
-*.swo
-
-# OS generated files
-.DS_Store
-.DS_Store?
-._*
-.Spotlight-V100
-.Trashes
-ehthumbs.db
-Thumbs.db
-
-# Environment variables
-.env
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local

frontend/dockerfile

@@ -1,8 +0,0 @@
-# backend/Dockerfile
-FROM node:18-alpine
-WORKDIR /app
-COPY package*.json ./
-RUN npm ci --only=production
-COPY . .
-EXPOSE 3001
-CMD ["node", "dist/server.js"]

frontend/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+  <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>Shift Planning App</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

frontend/package.json

@@ -2,46 +2,28 @@
   "name": "frontend",
   "version": "0.1.0",
   "private": true,
+  "type": "module",
   "dependencies": {
-    "@testing-library/dom": "^10.4.1",
-    "@testing-library/jest-dom": "^6.9.1",
-    "@testing-library/react": "^16.3.0",
-    "@testing-library/user-event": "^13.5.0",
-    "@types/jest": "^27.5.2",
-    "@types/node": "^16.18.126",
-    "@types/react": "^19.2.2",
-    "@types/react-dom": "^19.2.1",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "react-router-dom": "^6.28.0",
+    "date-fns": "4.1.0"
+  },
+  "devDependencies": {
+    "@types/node": "20.19.23",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
     "@types/react-router-dom": "^5.3.3",
-    "react": "^19.2.0",
-    "react-dom": "^19.2.0",
-    "react-router-dom": "^7.9.3",
-    "react-scripts": "5.0.1",
-    "typescript": "^4.9.5",
-    "web-vitals": "^2.1.4",
-    "worker_threads": "native"
+    "@vitejs/plugin-react": "^4.3.3",
+    "typescript": "^5.7.3",
+    "vite": "^6.0.7",
+    "esbuild": "^0.21.0",
+    "terser": "5.44.0",
+    "babel-plugin-transform-remove-console": "6.9.4"
   },
   "scripts": {
-    "start": "react-scripts start",
-    "build": "react-scripts build",
-    "test": "react-scripts test",
-    "eject": "react-scripts eject"
-  },
-  "eslintConfig": {
-    "extends": [
-      "react-app",
-      "react-app/jest"
-    ]
-  },
-  "browserslist": {
-    "production": [
-      ">0.2%",
-      "not dead",
-      "not op_mini all"
-    ],
-    "development": [
-      "last 1 chrome version",
-      "last 1 firefox version",
-      "last 1 safari version"
-    ]
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview"
   }
 }

frontend/public/manifest.json

@@ -1,6 +1,6 @@
 {
-  "short_name": "React App",
-  "name": "Create React App Sample",
+  "short_name": "SP",
+  "name": "schichtenplaner",
   "icons": [
     {
       "src": "favicon.ico",

frontend/src/App.test.tsx

@@ -1,9 +0,0 @@
-import React from 'react';
-import { render, screen } from '@testing-library/react';
-import App from './App';
-
-test('renders learn react link', () => {
-  render(<App />);
-  const linkElement = screen.getByText(/learn react/i);
-  expect(linkElement).toBeInTheDocument();
-});

frontend/src/App.tsx

@@ -1,4 +1,4 @@
-// frontend/src/App.tsx - KORRIGIERT MIT LAYOUT
+// src/App.tsx
 import React from 'react';
 import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
 import { AuthProvider, useAuth } from './contexts/AuthContext';
@@ -16,10 +16,42 @@ import Settings from './pages/Settings/Settings';
 import Help from './pages/Help/Help';
 import Setup from './pages/Setup/Setup';
 
+// Free Footer Link Pages (always available)
+import FAQ from './components/Layout/FooterLinks/FAQ/FAQ';
+import About from './components/Layout/FooterLinks/About/About';
+import Features from './components/Layout/FooterLinks/Features/Features';
+import { CommunityContact, CommunityLegalPage } from './components/Layout/FooterLinks/CommunityLinks/communityLinks';
+
+// Vite environment variables (use import.meta.env instead of process.env)
+const ENABLE_PRO = import.meta.env.ENABLE_PRO === 'true';
+
+// Conditional Premium Components
+let PremiumContact: React.FC = CommunityContact;
+let PremiumPrivacy: React.FC = () => <CommunityLegalPage title="Datenschutz" />;
+let PremiumImprint: React.FC = () => <CommunityLegalPage title="Impressum" />;
+let PremiumTerms: React.FC = () => <CommunityLegalPage title="AGB" />;
+
+// Load premium components only when ENABLE_PRO is true
+if (ENABLE_PRO) {
+  try {
+    // Use require with type assertions to avoid dynamic import issues
+    const premiumModule = require('@premium-frontend/components/FooterLinks');
+
+    if (premiumModule.Contact) PremiumContact = premiumModule.Contact;
+    if (premiumModule.Privacy) PremiumPrivacy = premiumModule.Privacy;
+    if (premiumModule.Imprint) PremiumImprint = premiumModule.Imprint;
+    if (premiumModule.Terms) PremiumTerms = premiumModule.Terms;
+    
+    console.log('✅ Premium components loaded successfully');
+  } catch (error) {
+    console.warn('⚠️ Premium components not available, using community fallbacks:', error);
+  }
+}
+
 // Protected Route Component
 const ProtectedRoute: React.FC<{ children: React.ReactNode; roles?: string[] }> = ({ 
   children, 
-  roles = ['admin', 'instandhalter', 'user'] 
+  roles = ['admin', 'maintenance', 'user'] 
 }) => {
   const { user, loading, hasRole } = useAuth();
 
@@ -49,11 +81,27 @@ const ProtectedRoute: React.FC<{ children: React.ReactNode; roles?: string[] }>
   return <Layout>{children}</Layout>;
 };
 
+// Public Route Component (without Layout for footer pages)
+const PublicRoute: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+  const { user, loading } = useAuth();
+
+  if (loading) {
+    return (
+      <div style={{ textAlign: 'center', padding: '40px' }}>
+        <div>⏳ Lade Anwendung...</div>
+      </div>
+    );
+  }
+
+  return user ? <Layout>{children}</Layout> : <>{children}</>;
+};
+
 // Main App Content
 const AppContent: React.FC = () => {
   const { loading, needsSetup, user } = useAuth();
 
   console.log('🏠 AppContent rendering - loading:', loading, 'needsSetup:', needsSetup, 'user:', user);
+  console.log('🎯 Premium features enabled:', ENABLE_PRO);
 
   // Während des Ladens
   if (loading) {
@@ -80,52 +128,32 @@ const AppContent: React.FC = () => {
   console.log('✅ Showing protected routes for user:', user.email);
   return (
     <Routes>
-      <Route path="/" element={
-        <ProtectedRoute>
-          <Dashboard />
-        </ProtectedRoute>
-      } />
-      <Route path="/shift-plans" element={
-        <ProtectedRoute>
-          <ShiftPlanList />
-        </ProtectedRoute>
-      } />
-      <Route path="/shift-plans/new" element={
-        <ProtectedRoute roles={['admin', 'instandhalter']}>
-          <ShiftPlanCreate />
-        </ProtectedRoute>
-      } />
-      <Route path="/shift-plans/:id/edit" element={
-        <ProtectedRoute roles={['admin', 'instandhalter']}>
-          <ShiftPlanEdit />
-        </ProtectedRoute>
-      } />
-      <Route path="/shift-plans/:id" element={
-        <ProtectedRoute>
-          <ShiftPlanView />
-        </ProtectedRoute>
-      } />
-      <Route path="/employees" element={
-        <ProtectedRoute roles={['admin', 'instandhalter']}>
-          <EmployeeManagement />
-        </ProtectedRoute>
-      } />
-      <Route path="/settings" element={
-        <ProtectedRoute>
-          <Settings />
-        </ProtectedRoute>
-      } />
-      <Route path="/help" element={
-        <ProtectedRoute>
-          <Help />
-        </ProtectedRoute>
-      } />
+      {/* Protected Routes (require login) */}
+      <Route path="/" element={<ProtectedRoute><Dashboard /></ProtectedRoute>} />
+      <Route path="/shift-plans" element={<ProtectedRoute><ShiftPlanList /></ProtectedRoute>} />
+      <Route path="/shift-plans/new" element={<ProtectedRoute roles={['admin', 'maintenance']}><ShiftPlanCreate /></ProtectedRoute>} />
+      <Route path="/shift-plans/:id/edit" element={<ProtectedRoute roles={['admin', 'maintenance']}><ShiftPlanEdit /></ProtectedRoute>} />
+      <Route path="/shift-plans/:id" element={<ProtectedRoute><ShiftPlanView /></ProtectedRoute>} />
+      <Route path="/employees" element={<ProtectedRoute roles={['admin', 'maintenance']}><EmployeeManagement /></ProtectedRoute>} />
+      <Route path="/settings" element={<ProtectedRoute><Settings /></ProtectedRoute>} />
+      <Route path="/help" element={<ProtectedRoute><Help /></ProtectedRoute>} />
+
+      {/* Public Footer Link Pages (always available) */}
+      <Route path="/faq" element={<PublicRoute><FAQ /></PublicRoute>} />
+      <Route path="/about" element={<PublicRoute><About /></PublicRoute>} />
+      <Route path="/features" element={<PublicRoute><Features /></PublicRoute>} />
+
+      {/* PREMIUM Footer Link Pages (conditionally available) */}
+      <Route path="/contact" element={<PublicRoute><PremiumContact /></PublicRoute>} />
+      <Route path="/privacy" element={<PublicRoute><PremiumPrivacy /></PublicRoute>} />
+      <Route path="/imprint" element={<PublicRoute><PremiumImprint /></PublicRoute>} />
+      <Route path="/terms" element={<PublicRoute><PremiumTerms /></PublicRoute>} />
+
+      {/* Auth Routes */}
       <Route path="/login" element={<Login />} />
-      <Route path="*" element={
-        <ProtectedRoute>
-          <Dashboard />
-        </ProtectedRoute>
-      } />
+      
+      {/* Catch-all Route */}
+      <Route path="*" element={<ProtectedRoute><Dashboard /></ProtectedRoute>} />
     </Routes>
   );
 };

frontend/src/components/Layout/Footer.tsx

@@ -1,4 +1,4 @@
-// frontend/src/components/Layout/Footer.tsx - ELEGANT WHITE DESIGN
+// frontend/src/components/Layout/Footer.tsx
 import React from 'react';
 
 const Footer: React.FC = () => {
@@ -10,12 +10,12 @@ const Footer: React.FC = () => {
       borderTop: '1px solid rgba(251, 250, 246, 0.1)',
     },
     footerContent: {
-      maxWidth: '1200px',
+      maxWidth: '1500px',
       margin: '0 auto',
       padding: '3rem 2rem 2rem',
       display: 'grid',
-      gridTemplateColumns: 'repeat(auto-fit, minmax(250px, 1fr))',
-      gap: '3rem',
+      gridTemplateColumns: 'repeat(auto-fit, minmax(100px, 1fr))',
+      gap: '1rem',
     },
     footerSection: {
       display: 'flex',
@@ -182,20 +182,6 @@ const Footer: React.FC = () => {
           >
             Funktionen
           </a>
-          <a 
-            href="/pricing" 
-            style={styles.footerLink}
-            onMouseEnter={(e) => {
-              e.currentTarget.style.color = '#FBFAF6';
-              e.currentTarget.style.transform = 'translateX(4px)';
-            }}
-            onMouseLeave={(e) => {
-              e.currentTarget.style.color = 'rgba(251, 250, 246, 0.7)';
-              e.currentTarget.style.transform = 'translateX(0)';
-            }}
-          >
-            Preise
-          </a>
         </div>
       </div>
       

frontend/src/components/Layout/FooterLinks/About/About.tsx

@@ -0,0 +1,76 @@
+// frontend/src/components/Layout/FooterLinks/About/About.tsx
+import React from 'react';
+
+const About: React.FC = () => {
+  return (
+    <div style={{ padding: '40px 20px', maxWidth: '800px', margin: '0 auto' }}>
+      <h1>👨‍💻 Über uns</h1>
+      
+      <div style={{ 
+        backgroundColor: 'white', 
+        borderRadius: '12px', 
+        padding: '30px', 
+        marginTop: '20px',
+        boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
+        border: '1px solid #e0e0e0',
+        lineHeight: 1.6
+      }}>
+        <h2 style={{ color: '#2c3e50' }}>Unser Team</h2>
+        
+        <div style={{ display: 'flex', alignItems: 'center', marginTop: '20px', padding: '20px', backgroundColor: '#f8f9fa', borderRadius: '8px' }}>
+          <div style={{ marginRight: '20px' }}>
+            <div style={{ 
+              width: '80px', 
+              height: '80px', 
+              backgroundColor: '#3498db', 
+              borderRadius: '50%',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              color: 'white',
+              fontSize: '2rem',
+              fontWeight: 'bold'
+            }}>
+              P
+            </div>
+          </div>
+          <div>
+            <h3 style={{ color: '#2c3e50', margin: '0 0 5px 0' }}>Patrick</h3>
+            <p style={{ color: '#6c757d', margin: '0 0 10px 0' }}>
+              Full-Stack Developer & Projektleiter
+            </p>
+            <p style={{ margin: 0, fontSize: '0.9rem' }}>
+              GitHub: <a href="https://github.com/donpat1to" style={{ color: '#3498db' }}>donpat1to</a><br/>
+              E-Mail: <a href="mailto:dev.patrick@inca-vikingo.de" style={{ color: '#3498db' }}>dev.patrick@inca-vikingo.de</a>
+            </p>
+          </div>
+        </div>
+        
+        <h3 style={{ color: '#3498db', marginTop: '30px' }}>🚀 Unsere Mission</h3>
+        <p>
+          Wir entwickeln intelligente Lösungen für die Personalplanung, 
+          die Zeit sparen und faire Schichtverteilung gewährleisten.
+        </p>
+        
+        <h3 style={{ color: '#3498db', marginTop: '25px' }}>💻 Technologie</h3>
+        <p>
+          Unser Stack umfasst moderne Technologien:
+        </p>
+        <ul>
+          <li>Frontend: React, TypeScript</li>
+          <li>Backend: Node.js, Express</li>
+          <li>Optimierung: Google OR-Tools CP-SAT</li>
+          <li>Datenbank: SQLite/PostgreSQL</li>
+        </ul>
+        
+        <h3 style={{ color: '#3498db', marginTop: '25px' }}>📈 Entwicklung</h3>
+        <p>
+          Schichtenplaner wird kontinuierlich weiterentwickelt und 
+          basiert auf Feedback unserer Nutzer.
+        </p>
+      </div>
+    </div>
+  );
+};
+
+export default About;

frontend/src/components/Layout/FooterLinks/CommunityLinks/communityLinks.tsx

@@ -0,0 +1,38 @@
+// frontend/src/components/Layout/FooterLinks/CommunityLinks/communityLinks.tsx
+import React from 'react';
+
+export const CommunityContact: React.FC = () => (
+  <div style={{ padding: '40px 20px', maxWidth: '800px', margin: '0 auto' }}>
+    <h1>📞 Kontakt</h1>
+    <div style={{ backgroundColor: 'white', borderRadius: '12px', padding: '30px', marginTop: '20px' }}>
+      <h2 style={{ color: '#2c3e50' }}>Community Edition</h2>
+      <p>Kontaktfunktionen sind in der Premium Edition verfügbar.</p>
+      <p>
+        <a href="/features" style={{ color: '#3498db' }}>
+          ➡️ Zu den Features
+        </a>
+      </p>
+    </div>
+  </div>
+);
+
+export const CommunityLegalPage: React.FC<{ title: string }> = ({ title }) => (
+  <div style={{ padding: '40px 20px', maxWidth: '800px', margin: '0 auto' }}>
+    <h1>📄 {title}</h1>
+    <div style={{ backgroundColor: 'white', borderRadius: '12px', padding: '30px', marginTop: '20px' }}>
+      <h2 style={{ color: '#2c3e50' }}>Community Edition</h2>
+      <p>Rechtliche Dokumentation ist in der Premium Edition verfügbar.</p>
+      <p>
+        <a href="/features" style={{ color: '#3498db' }}>
+          ➡️ Erfahren Sie mehr über Premium
+        </a>
+      </p>
+    </div>
+  </div>
+);
+
+// Optional: Barrel export für einfachere Imports
+export default {
+  CommunityContact,
+  CommunityLegalPage
+};

frontend/src/components/Layout/FooterLinks/FAQ/FAQ.tsx

@@ -0,0 +1,103 @@
+// frontend/src/components/Layout/FooterLinks/FAQ/FAQ.tsx
+import React, { useState } from 'react';
+
+const FAQ: React.FC = () => {
+  const [openItems, setOpenItems] = useState<number[]>([]);
+
+  const toggleItem = (index: number) => {
+    setOpenItems(prev => 
+      prev.includes(index) 
+        ? prev.filter(i => i !== index)
+        : [...prev, index]
+    );
+  };
+
+  const faqItems = [
+    {
+      question: "Wie funktioniert der Scheduling-Algorithmus?",
+      answer: "Unser System verwendet Google's OR-Tools CP-SAT Solver, um optimale Schichtzuweisungen basierend auf Verfügbarkeiten, Vertragstypen und Geschäftsregeln zu berechnen."
+    },
+    {
+      question: "Was bedeuten die Verfügbarkeits-Level 1, 2 und 3?",
+      answer: "Level 1: Bevorzugt (Mitarbeiter möchte diese Schicht), Level 2: Verfügbar (kann arbeiten), Level 3: Nicht verfügbar (kann nicht arbeiten)."
+    },
+    {
+      question: "Wie werden Vertragstypen berücksichtigt?",
+      answer: "Kleine Verträge: 1 Schicht pro Woche, Große Verträge: 2 Schichten pro Woche. Das System weist genau diese Anzahl zu."
+    },
+    {
+      question: "Kann ich manuelle Anpassungen vornehmen?",
+      answer: "Ja, nach dem automatischen Scheduling können Sie Zuordnungen manuell anpassen und optimieren."
+    },
+    {
+      question: "Was passiert bei unterbesetzten Schichten?",
+      answer: "Das System zeigt eine Warnung an und versucht, alternative Lösungen zu finden. In kritischen Fällen müssen manuelle Anpassungen vorgenommen werden."
+    },
+    {
+      question: "Wie lange dauert die Planungserstellung?",
+      answer: "Typischerweise maximal 105 Sekunden, abhängig von der Anzahl der Mitarbeiter und Schichten."
+    }
+  ];
+
+  return (
+    <div style={{ padding: '40px 20px', maxWidth: '800px', margin: '0 auto' }}>
+      <h1>❓ Häufige Fragen (FAQ)</h1>
+      
+      <div style={{ 
+        backgroundColor: 'white', 
+        borderRadius: '12px', 
+        marginTop: '20px',
+        boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
+        border: '1px solid #e0e0e0'
+      }}>
+        {faqItems.map((item, index) => (
+          <div key={index} style={{ 
+            borderBottom: index < faqItems.length - 1 ? '1px solid #e0e0e0' : 'none',
+            padding: '20px 30px'
+          }}>
+            <div
+              onClick={() => toggleItem(index)}
+              style={{
+                cursor: 'pointer',
+                display: 'flex',
+                justifyContent: 'space-between',
+                alignItems: 'center'
+              }}
+            >
+              <h3 style={{ 
+                color: '#2c3e50', 
+                margin: 0,
+                fontSize: '1.1rem'
+              }}>
+                {item.question}
+              </h3>
+              <span style={{ 
+                fontSize: '1.5rem',
+                color: '#3498db',
+                transform: openItems.includes(index) ? 'rotate(45deg)' : 'rotate(0)',
+                transition: 'transform 0.2s ease'
+              }}>
+                +
+              </span>
+            </div>
+            
+            {openItems.includes(index) && (
+              <div style={{ 
+                marginTop: '15px',
+                padding: '15px',
+                backgroundColor: '#f8f9fa',
+                borderRadius: '8px',
+                color: '#6c757d',
+                lineHeight: 1.6
+              }}>
+                {item.answer}
+              </div>
+            )}
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+};
+
+export default FAQ;

frontend/src/components/Layout/FooterLinks/Features/Features.tsx

@@ -0,0 +1,111 @@
+// frontend/src/components/Layou/FooterLinks/Features/Features.tsx
+import React from 'react';
+
+const Features: React.FC = () => {
+  const features = [
+    {
+      icon: "🤖",
+      title: "Automatisches Scheduling",
+      description: "Intelligenter Algorithmus erstellt optimale Schichtpläne basierend auf Verfügbarkeiten und Regeln"
+    },
+    {
+      icon: "⚡",
+      title: "Schnelle Berechnung",
+      description: "Google OR-Tools CP-SAT Solver findet Lösungen in maximal 105 Sekunden"
+    },
+    {
+      icon: "👥",
+      title: "Flexible Regelkonfiguration",
+      description: "Anpassbare Geschäftsregeln für Trainee-Betreuung, Alleinarbeit, Vertragstypen"
+    },
+    {
+      icon: "📊",
+      title: "Echtzeit-Validierung",
+      description: "Automatische Erkennung von Regelverletzungen und Konflikten"
+    },
+    {
+      icon: "🔒",
+      title: "Lokale Datenspeicherung",
+      description: "Alle Daten bleiben in Ihrer Infrastruktur - volle Kontrolle und Datenschutz"
+    },
+    {
+      icon: "🎯",
+      title: "Präferenz-basiert",
+      description: "Berücksichtigt Mitarbeiterwünsche für höhere Zufriedenheit"
+    }
+  ];
+
+  return (
+    <div style={{ padding: '40px 20px', maxWidth: '1000px', margin: '0 auto' }}>
+      <h1>✨ Funktionen</h1>
+      
+      <div style={{ 
+        backgroundColor: 'white', 
+        borderRadius: '12px', 
+        padding: '30px', 
+        marginTop: '20px',
+        boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
+        border: '1px solid #e0e0e0'
+      }}>
+        <h2 style={{ color: '#2c3e50', textAlign: 'center', marginBottom: '40px' }}>
+          Alles, was Sie für die perfekte Schichtplanung benötigen
+        </h2>
+        
+        <div style={{ 
+          display: 'grid', 
+          gridTemplateColumns: 'repeat(auto-fit, minmax(300px, 1fr))', 
+          gap: '30px' 
+        }}>
+          {features.map((feature, index) => (
+            <div key={index} style={{
+              padding: '25px',
+              backgroundColor: '#f8f9fa',
+              borderRadius: '12px',
+              border: '2px solid #e9ecef',
+              textAlign: 'center',
+              transition: 'transform 0.2s ease, box-shadow 0.2s ease'
+            }}>
+              <div style={{ 
+                fontSize: '3rem',
+                marginBottom: '15px'
+              }}>
+                {feature.icon}
+              </div>
+              <h3 style={{ 
+                color: '#2c3e50',
+                margin: '0 0 15px 0'
+              }}>
+                {feature.title}
+              </h3>
+              <p style={{ 
+                color: '#6c757d',
+                margin: 0,
+                lineHeight: 1.5
+              }}>
+                {feature.description}
+              </p>
+            </div>
+          ))}
+        </div>
+        
+        <div style={{ 
+          marginTop: '40px',
+          padding: '25px',
+          backgroundColor: '#e8f4fd',
+          borderRadius: '12px',
+          border: '2px solid #b8d4f0',
+          textAlign: 'center'
+        }}>
+          <h3 style={{ color: '#2980b9', margin: '0 0 15px 0' }}>
+            🚀 Starter Sie durch
+          </h3>
+          <p style={{ color: '#2c3e50', margin: 0 }}>
+            Erstellen Sie Ihren ersten optimierten Schichtplan in wenigen Minuten.
+          </p>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default Features;

frontend/src/components/Layout/Layout.module.css

@@ -1,220 +0,0 @@
-/* Layout.css - Professionelles Design */
-.layout {
-  min-height: 100vh;
-  display: flex;
-  flex-direction: column;
-}
-
-/* Header */
-.header {
-  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-  color: white;
-  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
-  position: sticky;
-  top: 0;
-  z-index: 1000;
-}
-
-.header-content {
-  max-width: 1200px;
-  margin: 0 auto;
-  padding: 0 20px;
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  height: 70px;
-}
-
-.logo h1 {
-  margin: 0;
-  font-size: 1.5rem;
-  font-weight: 700;
-}
-
-/* Desktop Navigation */
-.desktop-nav {
-  display: flex;
-  gap: 2rem;
-  align-items: center;
-}
-
-.nav-link {
-  color: white;
-  text-decoration: none;
-  padding: 0.5rem 1rem;
-  border-radius: 6px;
-  transition: all 0.3s ease;
-  font-weight: 500;
-}
-
-.nav-link:hover {
-  background: rgba(255, 255, 255, 0.1);
-  transform: translateY(-1px);
-}
-
-/* User Menu */
-.user-menu {
-  display: flex;
-  align-items: center;
-  gap: 1rem;
-}
-
-.user-info {
-  font-weight: 500;
-}
-
-.logout-btn {
-  background: rgba(255, 255, 255, 0.1);
-  color: white;
-  border: 1px solid rgba(255, 255, 255, 0.3);
-  padding: 0.5rem 1rem;
-  border-radius: 6px;
-  cursor: pointer;
-  transition: all 0.3s ease;
-}
-
-.logout-btn:hover {
-  background: rgba(255, 255, 255, 0.2);
-}
-
-/* Mobile Menu Button */
-.mobile-menu-btn {
-  display: none;
-  background: none;
-  border: none;
-  color: white;
-  font-size: 1.5rem;
-  cursor: pointer;
-  padding: 0.5rem;
-}
-
-/* Mobile Navigation */
-.mobile-nav {
-  display: none;
-  flex-direction: column;
-  background: white;
-  padding: 1rem;
-  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
-}
-
-.mobile-nav-link {
-  color: #333;
-  text-decoration: none;
-  padding: 1rem;
-  border-bottom: 1px solid #eee;
-  transition: background-color 0.3s ease;
-}
-
-.mobile-nav-link:hover {
-  background-color: #f5f5f5;
-}
-
-.mobile-user-info {
-  padding: 1rem;
-  border-top: 1px solid #eee;
-  margin-top: 1rem;
-}
-
-.mobile-logout-btn {
-  background: #667eea;
-  color: white;
-  border: none;
-  padding: 0.5rem 1rem;
-  border-radius: 6px;
-  cursor: pointer;
-  margin-top: 0.5rem;
-  width: 100%;
-}
-
-/* Main Content */
-.main-content {
-  flex: 1;
-  background-color: #f8f9fa;
-  min-height: calc(100vh - 140px);
-}
-
-.content-container {
-  max-width: 1200px;
-  margin: 0 auto;
-  padding: 2rem 20px;
-}
-
-/* Footer */
-.footer {
-  background: #2c3e50;
-  color: white;
-  margin-top: auto;
-}
-
-.footer-content {
-  max-width: 1200px;
-  margin: 0 auto;
-  padding: 2rem 20px;
-  display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
-  gap: 2rem;
-}
-
-.footer-section h3,
-.footer-section h4 {
-  margin-bottom: 1rem;
-  color: #ecf0f1;
-}
-
-.footer-section a {
-  color: #bdc3c7;
-  text-decoration: none;
-  display: block;
-  margin-bottom: 0.5rem;
-  transition: color 0.3s ease;
-}
-
-.footer-section a:hover {
-  color: #3498db;
-}
-
-.footer-bottom {
-  border-top: 1px solid #34495e;
-  padding: 1rem 20px;
-  text-align: center;
-  color: #95a5a6;
-}
-
-/* Responsive Design */
-@media (max-width: 768px) {
-  .desktop-nav,
-  .user-menu {
-    display: none;
-  }
-  
-  .mobile-menu-btn {
-    display: block;
-  }
-  
-  .mobile-nav {
-    display: flex;
-  }
-  
-  .header-content {
-    padding: 0 15px;
-  }
-  
-  .content-container {
-    padding: 1rem 15px;
-  }
-  
-  .footer-content {
-    grid-template-columns: 1fr;
-    text-align: center;
-  }
-}
-
-@media (max-width: 480px) {
-  .logo h1 {
-    font-size: 1.2rem;
-  }
-  
-  .content-container {
-    padding: 1rem 10px;
-  }
-}

frontend/src/components/Layout/Layout.tsx

@@ -1,4 +1,4 @@
-// frontend/src/components/Layout/Layout.tsx - ELEGANT WHITE DESIGN
+// frontend/src/components/Layout/Layout.tsx
 import React from 'react';
 import Navigation from './Navigation';
 import Footer from './Footer';

frontend/src/components/Layout/Navigation.tsx

@@ -1,4 +1,4 @@
-// frontend/src/components/Layout/Navigation.tsx - ELEGANT WHITE DESIGN
+// frontend/src/components/Layout/Navigation.tsx
 import React, { useState, useEffect } from 'react';
 import { useAuth } from '../../contexts/AuthContext';
 import PillNav from '../PillNav/PillNav';
@@ -30,11 +30,11 @@ const Navigation: React.FC = () => {
   };
 
   const navigationItems = [
-    { path: '/', label: 'Dashboard', roles: ['admin', 'instandhalter', 'user'] },
-    { path: '/shift-plans', label: 'Schichtpläne', roles: ['admin', 'instandhalter', 'user'] },
-    { path: '/employees', label: 'Mitarbeiter', roles: ['admin', 'instandhalter'] },
-    { path: '/help', label: 'Hilfe', roles: ['admin', 'instandhalter', 'user'] },
-    { path: '/settings', label: 'Einstellungen', roles: ['admin', 'instandhalter', 'user'] },
+    { path: '/', label: 'Dashboard', roles: ['admin', 'maintenance', 'user'] },
+    { path: '/shift-plans', label: 'Schichtpläne', roles: ['admin', 'maintenance', 'user'] },
+    { path: '/employees', label: 'Mitarbeiter', roles: ['admin', 'maintenance'] },
+    { path: '/help', label: 'Hilfe', roles: ['admin', 'maintenance', 'user'] },
+    { path: '/settings', label: 'Einstellungen', roles: ['admin', 'maintenance', 'user'] },
   ];
 
   const filteredNavigation = navigationItems.filter(item => 

frontend/src/components/PillNav/PillNav.module.css

@@ -1,88 +0,0 @@
-/* frontend/src/components/PillNav/PillNav.module.css */
-.pillNavContainer {
-  display: flex;
-  gap: 8px;
-  overflow-x: auto;
-  padding: 4px;
-  scrollbar-width: none;
-  -ms-overflow-style: none;
-}
-
-.pillNavContainer::-webkit-scrollbar {
-  display: none;
-}
-
-.pill {
-  padding: 8px 16px;
-  border-radius: 9999px;
-  border: 1px solid;
-  font-size: 14px;
-  font-weight: 500;
-  cursor: pointer;
-  transition: all 0.2s ease-in-out;
-  white-space: nowrap;
-  outline: none;
-}
-
-.pill:focus-visible {
-  outline: 2px solid #3b82f6;
-  outline-offset: 2px;
-}
-
-/* Solid Variant */
-.pillSolid {
-  background-color: transparent;
-  color: #6b7280;
-  border-color: #d1d5db;
-}
-
-.pillSolidActive {
-  background-color: #2563eb;
-  color: white;
-  border-color: #2563eb;
-}
-
-.pillSolid:hover:not(.pillSolidActive) {
-  background-color: #f3f4f6;
-  color: #374151;
-  border-color: #9ca3af;
-  transform: translateY(-1px);
-}
-
-/* Outline Variant */
-.pillOutline {
-  background-color: transparent;
-  color: #6b7280;
-  border-color: #d1d5db;
-}
-
-.pillOutlineActive {
-  color: #2563eb;
-  border-color: #2563eb;
-  font-weight: 600;
-}
-
-.pillOutline:hover:not(.pillOutlineActive) {
-  background-color: #f3f4f6;
-  color: #374151;
-  border-color: #9ca3af;
-  transform: translateY(-1px);
-}
-
-/* Ghost Variant */
-.pillGhost {
-  background-color: transparent;
-  color: #6b7280;
-  border-color: transparent;
-}
-
-.pillGhostActive {
-  background-color: #f3f4f6;
-  color: #111827;
-}
-
-.pillGhost:hover:not(.pillGhostActive) {
-  background-color: #f9fafb;
-  color: #374151;
-  transform: translateY(-1px);
-}

frontend/src/components/PillNav/PillNav.tsx

@@ -1,4 +1,4 @@
-// frontend/src/components/PillNav/PillNav.tsx - ELEGANT WHITE DESIGN
+// frontend/src/components/PillNav/PillNav.tsx
 import React, { useEffect, useRef } from 'react';
 
 export interface PillNavItem {

frontend/src/components/PillNav/index.ts

@@ -1,3 +0,0 @@
-// frontend/src/components/PillNav/index.ts
-export { default } from './PillNav';
-export type { PillNavProps, PillNavItem } from './PillNav';

frontend/src/contexts/AuthContext.tsx

@@ -20,6 +20,7 @@ interface AuthContextType {
 }
 
 const AuthContext = createContext<AuthContextType | undefined>(undefined);
+const API_BASE_URL = process.env.REACT_APP_API_BASE_URL || '/api';
 
 interface AuthProviderProps {
   children: ReactNode;
@@ -48,7 +49,7 @@ export const AuthProvider: React.FC<AuthProviderProps> = ({ children }) => {
   const checkSetupStatus = async (): Promise<void> => {
     try {
       console.log('🔍 Checking setup status...');
-      const response = await fetch('http://localhost:3002/api/setup/status');
+      const response = await fetch(`${API_BASE_URL}/setup/status`);
       if (!response.ok) {
         throw new Error('Setup status check failed');
       }
@@ -72,7 +73,7 @@ export const AuthProvider: React.FC<AuthProviderProps> = ({ children }) => {
         return;
       }
 
-      const response = await fetch('http://localhost:3002/api/auth/me', {
+      const response = await fetch(`${API_BASE_URL}/auth/me`, {
         headers: {
           'Authorization': `Bearer ${token}`
         }
@@ -104,7 +105,7 @@ export const AuthProvider: React.FC<AuthProviderProps> = ({ children }) => {
     try {
       console.log('🔐 Attempting login for:', credentials.email);
       
-      const response = await fetch('http://localhost:3002/api/auth/login', {
+      const response = await fetch(`${API_BASE_URL}/auth/login`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',

frontend/src/design/DesignSystem.txt

@@ -1,4 +1,4 @@
-// frontend/src/design/DesignSystem.tsx
+// frontend/src/design/DesignSystem.txt
 export const designTokens = {
   colors: {
     // Primary Colors

frontend/src/index.css

@@ -1,3 +1,14 @@
+/* Reset and base styles */
+* {
+  box-sizing: border-box;
+  margin: 0;
+  padding: 0;
+}
+
+#root {
+  min-height: 100vh;
+}
+
 body {
   margin: 0;
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',

frontend/src/index.tsx

@@ -1,19 +0,0 @@
-import React from 'react';
-import ReactDOM from 'react-dom/client';
-import './index.css';
-import App from './App';
-import reportWebVitals from './reportWebVitals';
-
-const root = ReactDOM.createRoot(
-  document.getElementById('root') as HTMLElement
-);
-root.render(
-  <React.StrictMode>
-    <App />
-  </React.StrictMode>
-);
-
-// If you want to start measuring performance in your app, pass a function
-// to log results (for example: reportWebVitals(console.log))
-// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
-reportWebVitals();

frontend/src/main.tsx

@@ -0,0 +1,10 @@
+import React from 'react'
+import ReactDOM from 'react-dom/client'
+import App from './App.tsx'
+import './index.css'
+
+ReactDOM.createRoot(document.getElementById('root')!).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+)

frontend/src/pages/Auth/Login.tsx

@@ -1,18 +1,21 @@
-// frontend/src/pages/Auth/Login.tsx - KORRIGIERT
-import React, { useState, useEffect } from 'react';
+// frontend/src/pages/Auth/Login.tsx - UPDATED PASSWORD SECTION
+import React, { useState, useEffect, useRef } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { useAuth } from '../../contexts/AuthContext';
 import { useNotification } from '../../contexts/NotificationContext';
-import { employeeService } from '../../services/employeeService';
 
 const Login: React.FC = () => {
   const [email, setEmail] = useState('');
   const [password, setPassword] = useState('');
+  const [showPassword, setShowPassword] = useState(false);
   const [loading, setLoading] = useState(false);
   const { login, user } = useAuth();
   const { showNotification } = useNotification();
   const navigate = useNavigate();
   
+  const holdTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+  const passwordInputRef = useRef<HTMLInputElement>(null);
+
   useEffect(() => {
     if (user) {
       console.log('✅ User already logged in, redirecting to dashboard');
@@ -20,6 +23,47 @@ const Login: React.FC = () => {
     }
   }, [user, navigate]);
 
+  // Cleanup timeouts on unmount
+  useEffect(() => {
+    return () => {
+      if (holdTimeoutRef.current) {
+        clearTimeout(holdTimeoutRef.current);
+      }
+    };
+  }, []);
+
+  const handleMouseDown = () => {
+    // Start timeout to show password after a brief delay (300ms)
+    holdTimeoutRef.current = setTimeout(() => {
+      setShowPassword(true);
+    }, 300);
+  };
+
+  const handleMouseUp = () => {
+    // Clear the timeout if user releases before delay completes
+    if (holdTimeoutRef.current) {
+      clearTimeout(holdTimeoutRef.current);
+      holdTimeoutRef.current = null;
+    }
+    // Always hide password on release
+    setShowPassword(false);
+  };
+
+  const handleTouchStart = (e: React.TouchEvent) => {
+    e.preventDefault(); // Prevent context menu on mobile
+    handleMouseDown();
+  };
+
+  const handleTouchEnd = (e: React.TouchEvent) => {
+    e.preventDefault();
+    handleMouseUp();
+  };
+
+  // Prevent context menu on long press
+  const handleContextMenu = (e: React.MouseEvent) => {
+    e.preventDefault();
+  };
+
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
     setLoading(true);
@@ -35,7 +79,6 @@ const Login: React.FC = () => {
         message: `Willkommen zurück!`
       });
       
-      // Navigiere zur Startseite
       navigate('/');
       
     } catch (error: any) {
@@ -50,7 +93,6 @@ const Login: React.FC = () => {
     }
   };
 
-  // Wenn bereits eingeloggt, zeige Ladeanzeige
   if (user) {
     return (
       <div style={{ textAlign: 'center', padding: '40px' }}>
@@ -77,7 +119,7 @@ const Login: React.FC = () => {
       }}>
         <h2 style={{ textAlign: 'center', marginBottom: '30px' }}>Anmeldung</h2>
         
-        <div style={{ marginBottom: '20px' }}>
+        <div style={{ marginBottom: '20px', width: '100%' }}>
           <label style={{ display: 'block', marginBottom: '8px', fontWeight: 'bold' }}>
             E-Mail
           </label>
@@ -97,24 +139,57 @@ const Login: React.FC = () => {
           />
         </div>
 
-        <div style={{ marginBottom: '30px' }}>
+        <div style={{ marginBottom: '30px', width: '100%' }}>
           <label style={{ display: 'block', marginBottom: '8px', fontWeight: 'bold' }}>
             Passwort
           </label>
+          <div style={{ position: 'relative' }}>
             <input
-            type="password"
+              ref={passwordInputRef}
+              type={showPassword ? 'text' : 'password'}
               value={password}
               onChange={(e) => setPassword(e.target.value)}
               required
               style={{
                 width: '100%',
                 padding: '10px',
+                paddingRight: '10px',
                 border: '1px solid #ddd',
                 borderRadius: '4px',
                 fontSize: '16px'
               }}
               placeholder="Ihr Passwort"
             />
+            <button
+              type="button"
+              onMouseDown={handleMouseDown}
+              onMouseUp={handleMouseUp}
+              onMouseLeave={handleMouseUp} // Handle mouse leaving while pressed
+              onTouchStart={handleTouchStart}
+              onTouchEnd={handleTouchEnd}
+              onTouchCancel={handleTouchEnd} // Handle touch cancellation
+              onContextMenu={handleContextMenu}
+              style={{
+                position: 'absolute',
+                right: '10px',
+                top: '50%',
+                transform: 'translateY(-50%)',
+                background: 'none',
+                border: 'none',
+                cursor: 'pointer',
+                padding: '1px',
+                borderRadius: '1px',
+                backgroundColor: showPassword ? '#e0e0e0' : 'transparent',
+                transition: 'background-color 0.2s',
+                userSelect: 'none',
+                WebkitUserSelect: 'none',
+                touchAction: 'manipulation'
+              }}
+              title="Gedrückt halten zum Anzeigen des Passworts"
+            >
+              {showPassword ? '👁' : '👁'}
+            </button>
+          </div>
         </div>
 
         <button
@@ -123,7 +198,7 @@ const Login: React.FC = () => {
           style={{
             width: '100%',
             padding: '12px',
-            backgroundColor: loading ? '#ccc' : '#007bff',
+            backgroundColor: loading ? '#ccc' : '#51258f',
             color: 'white',
             border: 'none',
             borderRadius: '4px',

frontend/src/pages/Dashboard/Dashboard.tsx

@@ -393,7 +393,7 @@ const Dashboard: React.FC = () => {
       </div>
 
       {/* Quick Actions - Nur für Admins/Instandhalter */}
-      {hasRole(['admin', 'instandhalter']) && (
+      {hasRole(['admin', 'maintenance']) && (
         <div style={{ marginBottom: '30px' }}>
           <h2 style={{ marginBottom: '15px', color: '#2c3e50' }}>Schnellaktionen</h2>
           <div style={{ 
@@ -535,7 +535,7 @@ const Dashboard: React.FC = () => {
             <div style={{ textAlign: 'center', padding: '20px', color: '#666' }}>
               <div style={{ fontSize: '48px', marginBottom: '10px' }}>📅</div>
               <div>Kein aktiver Schichtplan</div>
-              {hasRole(['admin', 'instandhalter']) && (
+              {hasRole(['admin', 'maintenance']) && (
                 <Link to="/shift-plans/new">
                   <button style={{
                     marginTop: '10px',
@@ -643,7 +643,7 @@ const Dashboard: React.FC = () => {
         )}
 
         {/* Letzte Schichtpläne (für Admins/Instandhalter) */}
-        {hasRole(['admin', 'instandhalter']) && (
+        {hasRole(['admin', 'maintenance']) && (
           <div style={{
             backgroundColor: 'white',
             padding: '20px',

frontend/src/pages/Employees/components/AvailabilityManager.tsx

@@ -588,6 +588,31 @@ const AvailabilityManager: React.FC<AvailabilityManagerProps> = ({
         return;
       }
 
+      // Contract type validation
+      const availableShifts = validAvailabilities.filter(avail => 
+        avail.preferenceLevel === 1 || avail.preferenceLevel === 2
+      ).length;
+
+      let contractRequirement = 0;
+      let contractTypeName = '';
+
+      if (employee.contractType === 'small') {
+        contractRequirement = 2;
+        contractTypeName = 'Kleiner Vertrag';
+      } else if (employee.contractType === 'large') {
+        contractRequirement = 3;
+        contractTypeName = 'Großer Vertrag';
+      }
+
+      if (contractRequirement > 0 && availableShifts < contractRequirement) {
+        setError(
+          `${contractTypeName} erfordert mindestens ${contractRequirement} verfügbare Shifts. ` +
+          `Aktuell sind nur ${availableShifts} Shifts mit Verfügbarkeit "Bevorzugt" oder "Möglich" ausgewählt.`
+        );
+        setSaving(false);
+        return;
+      }
+
       // Convert to the format expected by the API - using shiftId directly
       const requestData = {
         planId: selectedPlanId,
@@ -633,6 +658,12 @@ const AvailabilityManager: React.FC<AvailabilityManagerProps> = ({
   // Get full name for display
   const employeeFullName = `${employee.firstname} ${employee.lastname}`;
 
+  // Mininmum amount of shifts per contract type
+  const availableShiftsCount = availabilities.filter(avail => 
+    avail.preferenceLevel === 1 || avail.preferenceLevel === 2
+  ).length;
+    
+
   return (
     <div style={{
       maxWidth: '1900px',
@@ -660,6 +691,14 @@ const AvailabilityManager: React.FC<AvailabilityManagerProps> = ({
         <p style={{ margin: 0, color: '#7f8c8d' }}>
           <strong>Email:</strong> {employee.email}
         </p>
+        {employee.contractType && (
+          <p style={{ margin: '5px 0 0 0', color: employee.contractType === 'small' ? '#f39c12' : '#27ae60' }}>
+            <strong>Vertrag:</strong> 
+            {employee.contractType === 'small' ? ' Kleiner Vertrag (min. 2 verfügbare Shifts)' : 
+            employee.contractType === 'large' ? ' Großer Vertrag (min. 3 verfügbare Shifts)' : 
+            ' Flexibler Vertrag'}
+          </p>
+        )}
       </div>
 
       {error && (
@@ -816,7 +855,7 @@ const AvailabilityManager: React.FC<AvailabilityManagerProps> = ({
             fontWeight: 'bold'
           }}
         >
-          {saving ? '⏳ Wird gespeichert...' : 'Verfügbarkeiten speichern'}
+          {saving ? '⏳ Wird gespeichert...' : `Verfügbarkeiten speichern (${availableShiftsCount})`}
         </button>
       </div>
     </div>

frontend/src/pages/Employees/components/EmployeeForm.tsx

@@ -99,21 +99,26 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
       if (checked) {
         return {
           ...prev,
-          roles: [...prev.roles, role]
+          roles: [role]
         };
       } else {
+        const newRoles = prev.roles.filter(r => r !== role);
         return{
           ...prev,
-          roles: prev.roles.filter(r => r !== role)
+          roles: newRoles.length > 0 ? newRoles : ['user']
         };
       }
     });
   };
 
   const handleEmployeeTypeChange = (employeeType: EmployeeType) => {
-    // Determine if contract type should be shown and set default
-    const requiresContract = employeeType !== 'guest';
-    const defaultContractType = requiresContract ? 'small' as ContractType : undefined;
+    // Determine contract type based on employee type
+    let contractType: ContractType | undefined;
+    if (employeeType === 'manager' || employeeType === 'apprentice') {
+      contractType = 'flexible';
+    } else if (employeeType !== 'guest') {
+      contractType = 'small';
+    }
 
     // Determine if can work alone based on employee type
     const canWorkAlone = employeeType === 'manager' || 
@@ -125,7 +130,7 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
     setFormData(prev => ({
       ...prev,
       employeeType,
-      contractType: defaultContractType,
+      contractType,
       canWorkAlone,
       isTrainee
     }));
@@ -180,7 +185,7 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
         // Password change logic remains the same
         if (showPasswordSection && passwordForm.newPassword && hasRole(['admin'])) {
           if (passwordForm.newPassword.length < 6) {
-            throw new Error('Das neue Passwort muss mindestens 6 Zeichen lang sein');
+            throw new Error('Das Passwort muss mindestens 6 Zeichen lang sein, Zahlen und Groß- / Kleinbuchstaben enthalten');
           }
           if (passwordForm.newPassword !== passwordForm.confirmPassword) {
             throw new Error('Die Passwörter stimmen nicht überein');
@@ -273,7 +278,7 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
                   onChange={handleChange}
                   required
                   style={{
-                    width: '100%',
+                    width: '94%',
                     padding: '10px',
                     border: '1px solid #ddd',
                     borderRadius: '4px',
@@ -294,7 +299,7 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
                   onChange={handleChange}
                   required
                   style={{
-                    width: '100%',
+                    width: '94%',
                     padding: '10px',
                     border: '1px solid #ddd',
                     borderRadius: '4px',
@@ -311,7 +316,7 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
                 E-Mail Adresse (automatisch generiert)
               </label>
               <div style={{
-                width: '100%',
+                width: '97%',
                 padding: '10px',
                 border: '1px solid #ddd',
                 borderRadius: '4px',
@@ -340,93 +345,21 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
                   required
                   minLength={6}
                   style={{
-                    width: '100%',
+                    width: '97%',
                     padding: '10px',
                     border: '1px solid #ddd',
                     borderRadius: '4px',
                     fontSize: '16px'
                   }}
-                  placeholder="Mindestens 6 Zeichen"
+                  placeholder="Mindestens 6 Zeichen, Zahlen, Groß- / Kleinzeichen"
                 />
                 <div style={{ fontSize: '12px', color: '#7f8c8d', marginTop: '5px' }}>
-                  Das Passwort muss mindestens 6 Zeichen lang sein.
+                  Das Passwort muss mindestens 6 Zeichen lang sein, Zahlen und Groß- / Kleinbuchstaben enthalten.
                 </div>
               </div>
             )}
           </div>
 
-          {/* Vertragstyp (nur für Admins und interne Mitarbeiter) */}
-          {hasRole(['admin']) && showContractType && (
-            <div style={{
-              padding: '20px',
-              backgroundColor: '#e8f4fd',
-              borderRadius: '8px',
-              border: '1px solid #b6d7e8'
-            }}>
-              <h3 style={{ margin: '0 0 15px 0', color: '#0c5460' }}>📝 Vertragstyp</h3>
-              
-              <div style={{ display: 'flex', flexDirection: 'column', gap: '12px' }}>
-                {contractTypeOptions.map(contract => (
-                  <div 
-                    key={contract.value}
-                    style={{
-                      display: 'flex',
-                      alignItems: 'flex-start',
-                      padding: '15px',
-                      border: `2px solid ${formData.contractType === contract.value ? '#3498db' : '#e0e0e0'}`,
-                      borderRadius: '8px',
-                      backgroundColor: formData.contractType === contract.value ? '#f0f8ff' : 'white',
-                      cursor: 'pointer',
-                      transition: 'all 0.2s'
-                    }}
-                    onClick={() => handleContractTypeChange(contract.value)}
-                  >
-                    <input
-                      type="radio"
-                      name="contractType"
-                      value={contract.value}
-                      checked={formData.contractType === contract.value}
-                      onChange={() => handleContractTypeChange(contract.value)}
-                      style={{
-                        marginRight: '12px',
-                        marginTop: '2px',
-                        width: '18px',
-                        height: '18px'
-                      }}
-                    />
-                    <div style={{ flex: 1 }}>
-                      <div style={{ 
-                        fontWeight: 'bold', 
-                        color: '#2c3e50',
-                        marginBottom: '4px',
-                        fontSize: '16px'
-                      }}>
-                        {contract.label}
-                      </div>
-                      <div style={{ 
-                        fontSize: '14px', 
-                        color: '#7f8c8d',
-                        lineHeight: '1.4'
-                      }}>
-                        {contract.description}
-                      </div>
-                    </div>
-                    <div style={{
-                      padding: '6px 12px',
-                      backgroundColor: formData.contractType === contract.value ? '#3498db' : '#95a5a6',
-                      color: 'white',
-                      borderRadius: '15px',
-                      fontSize: '12px',
-                      fontWeight: 'bold'
-                    }}>
-                      {contract.value.toUpperCase()}
-                    </div>
-                  </div>
-                ))}
-              </div>
-            </div>
-          )}
-
           {/* Mitarbeiter Kategorie */}
           <div style={{
             padding: '20px',
@@ -528,6 +461,107 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
             )}
           </div>
 
+          {/* Vertragstyp (nur für Admins und interne Mitarbeiter) */}
+          {hasRole(['admin']) && showContractType && (
+            <div style={{
+              padding: '20px',
+              backgroundColor: '#e8f4fd',
+              borderRadius: '8px',
+              border: '1px solid #b6d7e8'
+            }}>
+              <h3 style={{ margin: '0 0 15px 0', color: '#0c5460' }}>📝 Vertragstyp</h3>
+              
+              <div style={{ display: 'flex', flexDirection: 'column', gap: '12px' }}>
+                {contractTypeOptions.map(contract => {
+                  const isFlexibleDisabled = contract.value === 'flexible' && formData.employeeType === 'personell';
+                  const isSmallLargeDisabled = (contract.value === 'small' || contract.value === 'large') && 
+                                            (formData.employeeType === 'manager' || formData.employeeType === 'apprentice');
+                  const isDisabled = isFlexibleDisabled || isSmallLargeDisabled;
+                  
+                  return (
+                    <div 
+                      key={contract.value}
+                      style={{
+                        display: 'flex',
+                        alignItems: 'flex-start',
+                        padding: '15px',
+                        border: `2px solid ${formData.contractType === contract.value ? '#3498db' : '#e0e0e0'}`,
+                        borderRadius: '8px',
+                        backgroundColor: formData.contractType === contract.value ? '#f0f8ff' : 'white',
+                        cursor: isDisabled ? 'not-allowed' : 'pointer',
+                        transition: 'all 0.2s',
+                        opacity: isDisabled ? 0.6 : 1
+                      }}
+                      onClick={isDisabled ? undefined : () => handleContractTypeChange(contract.value)}
+                    >
+                      <input
+                        type="radio"
+                        name="contractType"
+                        value={contract.value}
+                        checked={formData.contractType === contract.value}
+                        onChange={isDisabled ? undefined : () => handleContractTypeChange(contract.value)}
+                        disabled={isDisabled}
+                        style={{
+                          marginRight: '12px',
+                          marginTop: '2px',
+                          width: '18px',
+                          height: '18px'
+                        }}
+                      />
+                      <div style={{ flex: 1 }}>
+                        <div style={{ 
+                          fontWeight: 'bold', 
+                          color: '#2c3e50',
+                          marginBottom: '4px',
+                          fontSize: '16px'
+                        }}>
+                          {contract.label}
+                          {isFlexibleDisabled && (
+                            <span style={{
+                              fontSize: '12px',
+                              color: '#e74c3c',
+                              marginLeft: '8px',
+                              fontWeight: 'normal'
+                            }}>
+                              (Nicht verfügbar für Personell)
+                            </span>
+                          )}
+                          {isSmallLargeDisabled && (
+                            <span style={{
+                              fontSize: '12px',
+                              color: '#e74c3c',
+                              marginLeft: '8px',
+                              fontWeight: 'normal'
+                            }}>
+                              (Nicht verfügbar für {formData.employeeType === 'manager' ? 'Manager' : 'Auszubildende'})
+                            </span>
+                          )}
+                        </div>
+                        <div style={{ 
+                          fontSize: '14px', 
+                          color: '#7f8c8d',
+                          lineHeight: '1.4'
+                        }}>
+                          {contract.description}
+                        </div>
+                      </div>
+                      <div style={{
+                        padding: '6px 12px',
+                        backgroundColor: isDisabled ? '#95a5a6' : (formData.contractType === contract.value ? '#3498db' : '#95a5a6'),
+                        color: 'white',
+                        borderRadius: '15px',
+                        fontSize: '12px',
+                        fontWeight: 'bold'
+                      }}>
+                        {contract.value.toUpperCase()}
+                      </div>
+                    </div>
+                  );
+                })}
+              </div>
+            </div>
+          )}
+
           {/* Eigenständigkeit */}
           <div style={{
             padding: '20px',
@@ -638,7 +672,7 @@ const EmployeeForm: React.FC<EmployeeFormProps> = ({
                         borderRadius: '4px',
                         fontSize: '16px'
                       }}
-                      placeholder="Mindestens 6 Zeichen"
+                      placeholder="Mindestens 6 Zeichen, Zahlen, Groß- / Kleinzeichen"
                     />
                   </div>
 

frontend/src/pages/Employees/components/EmployeeList.tsx

@@ -48,6 +48,13 @@ const EmployeeList: React.FC<EmployeeListProps> = ({
     return true;
   });
 
+  // Helper to get highest role for sorting
+  const getHighestRole = (roles: string[]): string => {
+    if (roles.includes('admin')) return 'admin';
+    if (roles.includes('maintenance')) return 'maintenance';
+    return 'user';
+  };
+
   // Sort employees based on selected field and direction
   const sortedEmployees = [...filteredEmployees].sort((a, b) => {
     let aValue: any;
@@ -67,7 +74,6 @@ const EmployeeList: React.FC<EmployeeListProps> = ({
         bValue = b.canWorkAlone;
         break;
       case 'role':
-        // Use the highest role for sorting
         aValue = getHighestRole(a.roles || []);
         bValue = getHighestRole(b.roles || []);
         break;
@@ -87,13 +93,6 @@ const EmployeeList: React.FC<EmployeeListProps> = ({
     }
   });
 
-  // Helper to get highest role for sorting
-  const getHighestRole = (roles: string[]): string => {
-    if (roles.includes('admin')) return 'admin';
-    if (roles.includes('maintenance')) return 'maintenance';
-    return 'user';
-  };
-
   const handleSort = (field: SortField) => {
     if (sortField === field) {
       // Toggle direction if same field

frontend/src/pages/Help/Help.tsx

@@ -1,213 +1,50 @@
 // frontend/src/pages/Help/Help.tsx
-import React, { useState, useEffect } from 'react';
+import React from 'react';
 
 const Help: React.FC = () => {
-  const [currentStage, setCurrentStage] = useState(0);
-  const [isAnimating, setIsAnimating] = useState(false);
-
-  const algorithmStages = [
-    {
-      title: "📊 Phase A: Reguläre Mitarbeiterplanung",
-      description: "Zuweisung aller Mitarbeiter außer Manager",
-      steps: [
-        "Grundabdeckung: Mindestens 1 Mitarbeiter pro Schicht",
-        "Erfahrene Mitarbeiter werden bevorzugt",
-        "Verhindere 'Neu allein' Situationen",
-        "Fülle Schichten bis zur Zielbesetzung"
-      ],
-      color: "#3498db"
-    },
-    {
-      title: "👑 Phase B: Manager-Einfügung",
-      description: "Manager wird seinen bevorzugten Schichten zugewiesen",
-      steps: [
-        "Manager wird festen Schichten zugewiesen",
-        "Erfahrene Mitarbeiter werden zu Manager-Schichten hinzugefügt",
-        "Bei Problemen: Austausch oder Bewegung von Mitarbeitern",
-        "Fallback: Nicht-erfahrene als Backup"
-      ],
-      color: "#e74c3c"
-    },
-    {
-      title: "🔧 Phase C: Reparatur & Validierung",
-      description: "Probleme erkennen und automatisch beheben",
-      steps: [
-        "Überbesetzte erfahrene Mitarbeiter identifizieren",
-        "Mitarbeiter-Pool für Neuverteilung erstellen",
-        "Priorisierte Zuweisung zu Problem-Schichten",
-        "Finale Validierung aller Geschäftsregeln"
-      ],
-      color: "#2ecc71"
-    },
-    {
-      title: "✅ Finale Prüfung",
-      description: "Zusammenfassung und Freigabe",
-      steps: [
-        "Reparatur-Bericht generieren",
-        "Kritische vs. nicht-kritische Probleme klassifizieren",
-        "Veröffentlichungsstatus bestimmen",
-        "Benutzerfreundliche Zusammenfassung anzeigen"
-      ],
-      color: "#f39c12"
-    }
-  ];
-
   const businessRules = [
-    { rule: "Manager darf nicht allein arbeiten", critical: true },
-    { rule: "Erfahrene mit canWorkAlone: false dürfen nicht allein arbeiten", critical: true },
-    { rule: "Keine leeren Schichten", critical: true },
-    { rule: "Keine 'Neu allein' Situationen", critical: true },
-    { rule: "Manager sollte mit erfahrenem Mitarbeiter arbeiten", critical: false },
-    { rule: "Vertragslimits einhalten", critical: true },
-    { rule: "Nicht zu viele erfahrene Mitarbeiter in einer Schicht", critical: false }
+    { rule: "Mitarbeiter werden nur Schichten zugewiesen, für die sie sich eingetragen haben", critical: true },
+    { rule: "Maximal 1 Schicht pro Tag pro Mitarbeiter", critical: true },
+    { rule: "Schichten haben Mindest- und Maximalkapazitäten", critical: true },
+    { rule: "Trainees benötigen erfahrene Begleitung in jeder Schicht", critical: true },
+    { rule: "Mitarbeiter, die nicht alleine arbeiten können, müssen Begleitung haben", critical: true },
+    { rule: "Vertragslimits: Klein=1 Schicht/Woche, Groß=2 Schichten/Woche", critical: true },
+    { rule: "Manager werden automatisch ihren bevorzugten Schichten zugewiesen", critical: false }
   ];
 
-  useEffect(() => {
-    const interval = setInterval(() => {
-      if (isAnimating) {
-        setCurrentStage((prev) => (prev + 1) % algorithmStages.length);
+  const schedulingStages = [
+    {
+      title: "1. Verfügbarkeitsprüfung",
+      description: "Nur Mitarbeiter, die sich für Schichten eingetragen haben (Verfügbarkeit 1 oder 2), werden berücksichtigt."
+    },
+    {
+      title: "2. Modellaufbau",
+      description: "Das System erstellt ein mathematisches Modell mit allen Variablen und Constraints."
+    },
+    {
+      title: "3. CP-SAT Optimierung", 
+      description: "Google's Constraint Programming Solver findet die beste Zuordnung unter allen Regeln."
+    },
+    {
+      title: "4. Manager-Zuweisung",
+      description: "Manager werden automatisch ihren Wunschschichten (Verfügbarkeit 1) zugeordnet."
+    },
+    {
+      title: "5. Validierung",
+      description: "Die Lösung wird auf Regelverletzungen geprüft und ein Bericht generiert."
     }
-    }, 3000);
+  ];
 
-    return () => clearInterval(interval);
-  }, [isAnimating]);
-
-  const toggleAnimation = () => {
-    setIsAnimating(!isAnimating);
-  };
+  const preferenceLevels = [
+    { level: 1, label: "Bevorzugt", description: "Mitarbeiter möchte diese Schicht unbedingt arbeiten", color: "#27ae60" },
+    { level: 2, label: "Verfügbar", description: "Mitarbeiter ist verfügbar für diese Schicht", color: "#f39c12" },
+    { level: 3, label: "Nicht verfügbar", description: "Mitarbeiter kann diese Schicht nicht arbeiten", color: "#e74c3c" }
+  ];
 
   return (
     <div style={{ padding: '20px', maxWidth: '1200px', margin: '0 auto' }}>
       <h1>❓ Hilfe & Support - Scheduling Algorithmus</h1>
       
-      {/* Algorithm Visualization */}
-      <div style={{ 
-        backgroundColor: 'white', 
-        borderRadius: '12px', 
-        padding: '30px', 
-        marginTop: '20px',
-        boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
-        border: '1px solid #e0e0e0'
-      }}>
-        <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '20px' }}>
-          <h2 style={{ margin: 0, color: '#2c3e50' }}>🧠 Algorithmus Visualisierung</h2>
-          <button
-            onClick={toggleAnimation}
-            style={{
-              padding: '8px 16px',
-              backgroundColor: isAnimating ? '#e74c3c' : '#2ecc71',
-              color: 'white',
-              border: 'none',
-              borderRadius: '20px',
-              cursor: 'pointer',
-              fontWeight: 'bold'
-            }}
-          >
-            {isAnimating ? '⏸️ Animation pausieren' : '▶️ Animation starten'}
-          </button>
-        </div>
-
-        {/* Stage Indicators */}
-        <div style={{ 
-          display: 'flex', 
-          justifyContent: 'space-between', 
-          marginBottom: '30px',
-          position: 'relative'
-        }}>
-          {algorithmStages.map((stage, index) => (
-            <React.Fragment key={index}>
-              <div
-                style={{
-                  display: 'flex',
-                  flexDirection: 'column',
-                  alignItems: 'center',
-                  flex: 1
-                }}
-              >
-                <div
-                  style={{
-                    width: '60px',
-                    height: '60px',
-                    borderRadius: '50%',
-                    backgroundColor: currentStage === index ? stage.color : '#ecf0f1',
-                    display: 'flex',
-                    alignItems: 'center',
-                    justifyContent: 'center',
-                    color: currentStage === index ? 'white' : '#7f8c8d',
-                    fontWeight: 'bold',
-                    fontSize: '18px',
-                    transition: 'all 0.5s ease',
-                    boxShadow: currentStage === index ? `0 0 20px ${stage.color}80` : 'none',
-                    border: `3px solid ${stage.color}`
-                  }}
-                >
-                  {index + 1}
-                </div>
-                <div style={{ 
-                  textAlign: 'center', 
-                  marginTop: '10px',
-                  fontWeight: currentStage === index ? 'bold' : 'normal',
-                  color: currentStage === index ? stage.color : '#7f8c8d'
-                }}>
-                  {stage.title.split(':')[0]}
-                </div>
-              </div>
-              
-              {index < algorithmStages.length - 1 && (
-                <div style={{
-                  flex: 1,
-                  height: '3px',
-                  backgroundColor: currentStage > index ? stage.color : '#ecf0f1',
-                  alignSelf: 'center',
-                  margin: '0 10px',
-                  transition: 'all 0.5s ease'
-                }} />
-              )}
-            </React.Fragment>
-          ))}
-        </div>
-
-        {/* Current Stage Details */}
-          <div style={{
-            backgroundColor: algorithmStages[currentStage].color + '15',
-            border: `2px solid ${algorithmStages[currentStage].color}30`,
-            borderRadius: '8px',
-            padding: '20px',
-            marginBottom: '20px',
-            transition: 'all 0.5s ease'
-          }}>
-            <h3 style={{ color: algorithmStages[currentStage].color, marginTop: 0 }}>
-              {algorithmStages[currentStage].title}
-            </h3>
-            <p style={{ color: '#2c3e50', fontSize: '16px', marginBottom: '15px' }}>
-              {algorithmStages[currentStage].description}
-            </p>
-            <div style={{ display: 'grid', gap: '8px' }}>
-              {algorithmStages[currentStage].steps.map((step, stepIndex) => (
-                <div
-                  key={stepIndex}
-                  style={{
-                    padding: '10px 15px',
-                    backgroundColor: 'white',
-                    borderRadius: '6px',
-                    borderLeft: `4px solid ${algorithmStages[currentStage].color}`,
-                    display: 'flex',
-                    alignItems: 'center',
-                    animation: isAnimating ? 'pulse 2s infinite' : 'none'
-                  }}
-                >
-                  <span style={{ 
-                    marginRight: '10px', 
-                    color: algorithmStages[currentStage].color,
-                    fontWeight: 'bold'
-                  }}>•</span>
-                  {step}
-                </div>
-              ))}
-            </div>
-          </div>
-        </div>
-
       {/* Business Rules */}
       <div style={{ 
         backgroundColor: 'white', 
@@ -217,7 +54,7 @@ const Help: React.FC = () => {
         boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
         border: '1px solid #e0e0e0'
       }}>
-        <h2 style={{ color: '#2c3e50', marginBottom: '20px' }}>📋 Validierungs Regeln</h2>
+        <h2 style={{ color: '#2c3e50', marginBottom: '20px' }}>📋 Geschäftsregeln</h2>
         <div style={{ display: 'grid', gap: '10px' }}>
           {businessRules.map((rule, index) => (
             <div
@@ -248,14 +85,14 @@ const Help: React.FC = () => {
                 color: rule.critical ? '#e74c3c' : '#f39c12',
                 fontWeight: 'bold'
               }}>
-                {rule.critical ? 'KRITISCH' : 'WARNUNG'}
+                {rule.critical ? 'HART' : 'WEICH'}
               </span>
             </div>
           ))}
         </div>
       </div>
 
-      {/* Algorithm Explanation */}
+      {/* Scheduling Process */}
       <div style={{ 
         backgroundColor: 'white', 
         borderRadius: '12px', 
@@ -264,62 +101,125 @@ const Help: React.FC = () => {
         boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
         border: '1px solid #e0e0e0'
       }}>
-        <h2 style={{ color: '#2c3e50', marginBottom: '20px' }}>🎯 Wie der Algorithmus funktioniert</h2>
+        <h2 style={{ color: '#2c3e50', marginBottom: '20px' }}>⚙️ Scheduling-Prozess</h2>
         
-        <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fit, minmax(300px, 1fr))', gap: '20px' }}>
+        <div style={{ display: 'grid', gap: '15px' }}>
+          {schedulingStages.map((stage, index) => (
+            <div key={index} style={{
+              padding: '20px',
+              backgroundColor: '#f8f9fa',
+              borderRadius: '8px',
+              border: '2px solid #e9ecef',
+              display: 'flex',
+              alignItems: 'flex-start'
+            }}>
+              <div style={{
+                backgroundColor: '#3498db',
+                color: 'white',
+                borderRadius: '50%',
+                width: '30px',
+                height: '30px',
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+                fontWeight: 'bold',
+                marginRight: '15px',
+                flexShrink: 0
+              }}>
+                {index + 1}
+              </div>
               <div>
-            <h4 style={{ color: '#3498db' }}>🏗️ Phasen-basierter Ansatz</h4>
-            <p>Der Algorithmus arbeitet in klar definierten Phasen, um komplexe Probleme schrittweise zu lösen und Stabilität zu gewährleisten.</p>
+                <h4 style={{ color: '#2c3e50', margin: '0 0 8px 0' }}>{stage.title}</h4>
+                <p style={{ color: '#6c757d', margin: 0 }}>{stage.description}</p>
+              </div>
+            </div>
+          ))}
+        </div>
       </div>
 
+      {/* Preference Levels */}
+      <div style={{ 
+        backgroundColor: 'white', 
+        borderRadius: '12px', 
+        padding: '30px', 
+        marginTop: '20px',
+        boxShadow: '0 4px 6px rgba(0,0,0,0.1)',
+        border: '1px solid #e0e0e0'
+      }}>
+        <h2 style={{ color: '#2c3e50', marginBottom: '20px' }}>🎯 Verfügbarkeits-Level</h2>
+        
+        <div style={{ display: 'grid', gap: '12px' }}>
+          {preferenceLevels.map((pref) => (
+            <div key={pref.level} style={{
+              padding: '15px',
+              backgroundColor: `${pref.color}15`,
+              border: `2px solid ${pref.color}`,
+              borderRadius: '8px',
+              display: 'flex',
+              alignItems: 'center'
+            }}>
+              <div style={{
+                backgroundColor: pref.color,
+                color: 'white',
+                borderRadius: '6px',
+                padding: '8px 12px',
+                fontWeight: 'bold',
+                marginRight: '15px',
+                minWidth: '120px',
+                textAlign: 'center'
+              }}>
+                Level {pref.level}: {pref.label}
+              </div>
+              <span style={{ color: '#2c3e50' }}>{pref.description}</span>
+            </div>
+          ))}
+        </div>
+      </div>
+
+      {/* Tips */}
+      <div style={{ 
+        marginTop: '25px',
+        padding: '25px',
+        backgroundColor: '#e8f4fd',
+        borderRadius: '12px',
+        border: '2px solid #b8d4f0'
+      }}>
+        <h3 style={{ color: '#2980b9', marginTop: 0 }}>💡 Best Practices für erfolgreiches Scheduling</h3>
+        <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fit, minmax(300px, 1fr))', gap: '15px', marginTop: '15px' }}>
           <div>
-            <h4 style={{ color: '#e74c3c' }}>⚖️ Wert-basierte Entscheidungen</h4>
-            <p>Jede Zuweisung wird anhand eines Wertesystems bewertet, das Verfügbarkeit, Erfahrung und aktuelle Auslastung berücksichtigt.</p>
+            <h4 style={{ color: '#2980b9' }}>Vor dem Scheduling</h4>
+            <ul style={{ margin: 0, paddingLeft: '20px', color: '#2c3e50' }}>
+              <li>Stellen Sie sicher, dass alle Mitarbeiter ihre Verfügbarkeit eingetragen haben</li>
+              <li>Überprüfen Sie die Mitarbeiterprofile (Trainee/Erfahren, Alleinarbeit möglich)</li>
+              <li>Bestätigen Sie die Vertragstypen und Schichtanforderungen</li>
+            </ul>
           </div>
-          
           <div>
-            <h4 style={{ color: '#2ecc71' }}>🔧 Automatische Reparatur</h4>
-            <p>Probleme werden automatisch erkannt und durch intelligente Tausch- und Bewegungsoperationen behoben.</p>
+            <h4 style={{ color: '#2980b9' }}>Nach dem Scheduling</h4>
+            <ul style={{ margin: 0, paddingLeft: '20px', color: '#2c3e50' }}>
+              <li>Prüfen Sie den Lösungsbericht auf Verletzungen</li>
+              <li>Kontrollieren Sie unterbesetzte Schichten</li>
+              <li>Validieren Sie Trainee-Betreuung und Alleinarbeits-Regeln</li>
+            </ul>
           </div>
-          
-          <div>
-            <h4 style={{ color: '#f39c12' }}>📊 Transparente Berichterstattung</h4>
-            <p>Detaillierte Berichte zeigen genau, welche Probleme behoben wurden und welche verbleiben.</p>
         </div>
       </div>
 
-        
-      </div>
-
+      {/* Technical Info */}
       <div style={{ 
         marginTop: '25px',
         padding: '20px',
-          backgroundColor: '#e8f4fd',
+        backgroundColor: '#fff3cd',
         borderRadius: '8px',
-          border: '1px solid #b8d4f0'
+        border: '1px solid #ffeaa7'
       }}>
-          <h4 style={{ color: '#2980b9', marginTop: 0 }}>💡 Tipps für beste Ergebnisse</h4>
-          <ul style={{ margin: 0, paddingLeft: '20px' }}>
-            <li>Stellen Sie sicher, dass alle Mitarbeiter ihre Verfügbarkeit eingetragen haben</li>
-            <li>Überprüfen Sie die Vertragstypen (klein = 1 Schicht/Woche, groß = 2 Schichten/Woche)</li>
-            <li>Markieren Sie erfahrene Mitarbeiter, die alleine arbeiten können</li>
-            <li>Planen Sie Manager-Verfügbarkeit im Voraus</li>
-          </ul>
+        <h4 style={{ color: '#856404', marginTop: 0 }}>🔧 Technische Informationen</h4>
+        <p style={{ color: '#856404', margin: 0 }}>
+          <strong>Lösungsalgorithmus:</strong> Google OR-Tools CP-SAT Solver • 
+          <strong> Fallback:</strong> TypeScript-basierter Solver • 
+          <strong> Maximale Laufzeit:</strong> 105 Sekunden
+        </p>
       </div>
-
-      <style>{`
-        @keyframes pulse {
-          0% { transform: scale(1); }
-          50% { transform: scale(1.02); }
-          100% { transform: scale(1); }
-        }
-        
-        @keyframes glow {
-          0% { box-shadow: 0 0 5px rgba(52, 152, 219, 0.5); }
-          50% { box-shadow: 0 0 20px rgba(52, 152, 219, 0.8); }
-          100% { box-shadow: 0 0 5px rgba(52, 152, 219, 0.5); }
-        }
-      `}</style>
     </div>
   );
 };

frontend/src/pages/Settings/Settings.tsx

@@ -1,5 +1,5 @@
-// frontend/src/pages/Settings/Settings.tsx
-import React, { useState, useEffect } from 'react';
+// frontend/src/pages/Settings/Settings.tsx - UPDATED WITH NEW STYLES
+import React, { useState, useEffect, useRef } from 'react';
 import { useAuth } from '../../contexts/AuthContext';
 import { employeeService } from '../../services/employeeService';
 import { useNotification } from '../../contexts/NotificationContext';
@@ -27,6 +27,16 @@ const Settings: React.FC = () => {
     confirmPassword: ''
   });
 
+  // Password visibility states
+  const [showCurrentPassword, setShowCurrentPassword] = useState(false);
+  const [showNewPassword, setShowNewPassword] = useState(false);
+  const [showConfirmPassword, setShowConfirmPassword] = useState(false);
+
+  // Refs for timeout management
+  const currentPasswordTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+  const newPasswordTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+  const confirmPasswordTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+
   useEffect(() => {
     if (currentUser) {
       setProfileForm({
@@ -36,6 +46,17 @@ const Settings: React.FC = () => {
     }
   }, [currentUser]);
 
+  // Cleanup timeouts on unmount
+  useEffect(() => {
+    return () => {
+      [currentPasswordTimeoutRef, newPasswordTimeoutRef, confirmPasswordTimeoutRef].forEach(ref => {
+        if (ref.current) {
+          clearTimeout(ref.current);
+        }
+      });
+    };
+  }, []);
+
   const handleProfileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
     const { name, value } = e.target;
     setProfileForm(prev => ({
@@ -52,6 +73,67 @@ const Settings: React.FC = () => {
     }));
   };
 
+  // Password visibility handlers for current password
+  const handleCurrentPasswordMouseDown = () => {
+    currentPasswordTimeoutRef.current = setTimeout(() => {
+      setShowCurrentPassword(true);
+    }, 300);
+  };
+
+  const handleCurrentPasswordMouseUp = () => {
+    if (currentPasswordTimeoutRef.current) {
+      clearTimeout(currentPasswordTimeoutRef.current);
+      currentPasswordTimeoutRef.current = null;
+    }
+    setShowCurrentPassword(false);
+  };
+
+  // Password visibility handlers for new password
+  const handleNewPasswordMouseDown = () => {
+    newPasswordTimeoutRef.current = setTimeout(() => {
+      setShowNewPassword(true);
+    }, 300);
+  };
+
+  const handleNewPasswordMouseUp = () => {
+    if (newPasswordTimeoutRef.current) {
+      clearTimeout(newPasswordTimeoutRef.current);
+      newPasswordTimeoutRef.current = null;
+    }
+    setShowNewPassword(false);
+  };
+
+  // Password visibility handlers for confirm password
+  const handleConfirmPasswordMouseDown = () => {
+    confirmPasswordTimeoutRef.current = setTimeout(() => {
+      setShowConfirmPassword(true);
+    }, 300);
+  };
+
+  const handleConfirmPasswordMouseUp = () => {
+    if (confirmPasswordTimeoutRef.current) {
+      clearTimeout(confirmPasswordTimeoutRef.current);
+      confirmPasswordTimeoutRef.current = null;
+    }
+    setShowConfirmPassword(false);
+  };
+
+  // Touch event handlers
+  const handleTouchStart = (setter: () => void) => (e: React.TouchEvent) => {
+    e.preventDefault();
+    setter();
+  };
+
+  const handleTouchEnd = (cleanup: () => void) => (e: React.TouchEvent) => {
+    e.preventDefault();
+    cleanup();
+  };
+
+  // Prevent context menu
+  const handleContextMenu = (e: React.MouseEvent) => {
+    e.preventDefault();
+  };
+
   const handleProfileUpdate = async (e: React.FormEvent) => {
     e.preventDefault();
     if (!currentUser) return;
@@ -180,11 +262,6 @@ const Settings: React.FC = () => {
     );
   }
 
-  // Get full name for display
-  const getFullName = () => {
-    return `${currentUser.firstname || ''} ${currentUser.lastname || ''}`.trim();
-  };
-
   return (
     <div style={styles.container}>
       {/* Left Sidebar with Tabs */}
@@ -443,17 +520,19 @@ const Settings: React.FC = () => {
             
             <form onSubmit={handlePasswordUpdate} style={{ marginTop: '2rem' }}>
               <div style={styles.formGridCompact}>
+                {/* Current Password Field */}
                 <div style={styles.field}>
                   <label style={styles.fieldLabel}>
                     Aktuelles Passwort *
                   </label>
+                  <div style={styles.fieldInputContainer}>
                     <input
-                    type="password"
+                      type={showCurrentPassword ? 'text' : 'password'}
                       name="currentPassword"
                       value={passwordForm.currentPassword}
                       onChange={handlePasswordChange}
                       required
-                    style={styles.fieldInput}
+                      style={styles.fieldInputWithIcon}
                       placeholder="Aktuelles Passwort"
                       onFocus={(e) => {
                         e.target.style.borderColor = '#1a1325';
@@ -464,20 +543,40 @@ const Settings: React.FC = () => {
                         e.target.style.boxShadow = 'none';
                       }}
                     />
+                    <button
+                      type="button"
+                      onMouseDown={handleCurrentPasswordMouseDown}
+                      onMouseUp={handleCurrentPasswordMouseUp}
+                      onMouseLeave={handleCurrentPasswordMouseUp}
+                      onTouchStart={handleTouchStart(handleCurrentPasswordMouseDown)}
+                      onTouchEnd={handleTouchEnd(handleCurrentPasswordMouseUp)}
+                      onTouchCancel={handleTouchEnd(handleCurrentPasswordMouseUp)}
+                      onContextMenu={handleContextMenu}
+                      style={{
+                        ...styles.passwordToggleButton,
+                        backgroundColor: showCurrentPassword ? 'rgba(26, 19, 37, 0.1)' : 'transparent'
+                      }}
+                      title="Gedrückt halten zum Anzeigen des Passworts"
+                    >
+                      {showCurrentPassword ? '👁' : '👁'}
+                    </button>
+                  </div>
                 </div>
 
+                {/* New Password Field */}
                 <div style={styles.field}>
                   <label style={styles.fieldLabel}>
                     Neues Passwort *
                   </label>
+                  <div style={styles.fieldInputContainer}>
                     <input
-                    type="password"
+                      type={showNewPassword ? 'text' : 'password'}
                       name="newPassword"
                       value={passwordForm.newPassword}
                       onChange={handlePasswordChange}
                       required
                       minLength={6}
-                    style={styles.fieldInput}
+                      style={styles.fieldInputWithIcon}
                       placeholder="Mindestens 6 Zeichen"
                       onFocus={(e) => {
                         e.target.style.borderColor = '#1a1325';
@@ -488,22 +587,42 @@ const Settings: React.FC = () => {
                         e.target.style.boxShadow = 'none';
                       }}
                     />
+                    <button
+                      type="button"
+                      onMouseDown={handleNewPasswordMouseDown}
+                      onMouseUp={handleNewPasswordMouseUp}
+                      onMouseLeave={handleNewPasswordMouseUp}
+                      onTouchStart={handleTouchStart(handleNewPasswordMouseDown)}
+                      onTouchEnd={handleTouchEnd(handleNewPasswordMouseUp)}
+                      onTouchCancel={handleTouchEnd(handleNewPasswordMouseUp)}
+                      onContextMenu={handleContextMenu}
+                      style={{
+                        ...styles.passwordToggleButton,
+                        backgroundColor: showNewPassword ? 'rgba(26, 19, 37, 0.1)' : 'transparent'
+                      }}
+                      title="Gedrückt halten zum Anzeigen des Passworts"
+                    >
+                      {showNewPassword ? '👁' : '👁'}
+                    </button>
+                  </div>
                   <div style={styles.fieldHint}>
                     Das Passwort muss mindestens 6 Zeichen lang sein.
                   </div>
                 </div>
 
+                {/* Confirm Password Field */}
                 <div style={styles.field}>
                   <label style={styles.fieldLabel}>
                     Neues Passwort bestätigen *
                   </label>
+                  <div style={styles.fieldInputContainer}>
                     <input
-                    type="password"
+                      type={showConfirmPassword ? 'text' : 'password'}
                       name="confirmPassword"
                       value={passwordForm.confirmPassword}
                       onChange={handlePasswordChange}
                       required
-                    style={styles.fieldInput}
+                      style={styles.fieldInputWithIcon}
                       placeholder="Passwort wiederholen"
                       onFocus={(e) => {
                         e.target.style.borderColor = '#1a1325';
@@ -514,6 +633,24 @@ const Settings: React.FC = () => {
                         e.target.style.boxShadow = 'none';
                       }}
                     />
+                    <button
+                      type="button"
+                      onMouseDown={handleConfirmPasswordMouseDown}
+                      onMouseUp={handleConfirmPasswordMouseUp}
+                      onMouseLeave={handleConfirmPasswordMouseUp}
+                      onTouchStart={handleTouchStart(handleConfirmPasswordMouseDown)}
+                      onTouchEnd={handleTouchEnd(handleConfirmPasswordMouseUp)}
+                      onTouchCancel={handleTouchEnd(handleConfirmPasswordMouseUp)}
+                      onContextMenu={handleContextMenu}
+                      style={{
+                        ...styles.passwordToggleButton,
+                        backgroundColor: showConfirmPassword ? 'rgba(26, 19, 37, 0.1)' : 'transparent'
+                      }}
+                      title="Gedrückt halten zum Anzeigen des Passworts"
+                    >
+                      {showConfirmPassword ? '👁' : '👁'}
+                    </button>
+                  </div>
                 </div>
               </div>
 

frontend/src/pages/Settings/type/SettingsType.tsx

@@ -1,3 +1,4 @@
+// frontend/src/pages/Settings/type/SettingsType.tsx - CORRECTED
 export const styles = {
     container: {
       display: 'flex',
@@ -74,7 +75,7 @@
       border: '1px solid rgba(255, 255, 255, 0.8)',
       boxShadow: '0 4px 20px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04)',
       backdropFilter: 'blur(10px)',
-      minHeight: '200px',
+      minHeight: '100px',
     },
     section: {
       marginBottom: '2rem',
@@ -121,11 +122,17 @@
       display: 'flex',
       flexDirection: 'column' as const,
       gap: '0.5rem',
+      width: '100%',
     },
     fieldLabel: {
       fontSize: '0.9rem',
       fontWeight: 600,
       color: '#161718',
+      width: '100%',
+    },
+    fieldInputContainer: {
+      position: 'relative' as const,
+      width: '100%',
     },
     fieldInput: {
       padding: '0.875rem 1rem',
@@ -135,6 +142,20 @@
       background: '#FBFAF6',
       transition: 'all 0.3s cubic-bezier(0.4, 0, 0.2, 1)',
       color: '#161718',
+      width: '100%',
+      boxSizing: 'border-box' as const,
+    },
+    fieldInputWithIcon: {
+      padding: '0.875rem 1rem',
+      border: '1.5px solid #e8e8e8',
+      borderRadius: '8px',
+      fontSize: '0.95rem',
+      background: '#FBFAF6',
+      transition: 'all 0.3s cubic-bezier(0.4, 0, 0.2, 1)',
+      color: '#161718',
+      width: '100%',
+      paddingRight: '40px',
+      boxSizing: 'border-box' as const,
     },
     fieldInputDisabled: {
       padding: '0.875rem 1rem',
@@ -144,11 +165,29 @@
       background: 'rgba(26, 19, 37, 0.05)',
       color: '#666',
       cursor: 'not-allowed',
+      width: '100%',
+      boxSizing: 'border-box' as const,
     },
     fieldHint: {
       fontSize: '0.8rem',
       color: '#888',
       marginTop: '0.25rem',
+      width: '100%',
+    },
+    passwordToggleButton: {
+      position: 'absolute' as const,
+      right: '10px',
+      top: '50%',
+      transform: 'translateY(-50%)',
+      background: 'none',
+      border: 'none',
+      cursor: 'pointer',
+      padding: '5px',
+      borderRadius: '4px',
+      transition: 'background-color 0.2s',
+      userSelect: 'none' as const,
+      WebkitUserSelect: 'none' as const,
+      touchAction: 'manipulation' as const,
     },
     actions: {
       display: 'flex',

frontend/src/pages/Setup/Setup.tsx

@@ -2,6 +2,8 @@
 import React, { useState } from 'react';
 import { useAuth } from '../../contexts/AuthContext';
 
+const API_BASE_URL = '/api';
+
 const Setup: React.FC = () => {
   const [step, setStep] = useState(1);
   const [formData, setFormData] = useState({
@@ -73,7 +75,7 @@ const Setup: React.FC = () => {
 
       console.log('🚀 Sending setup request...', payload);
 
-      const response = await fetch('http://localhost:3002/api/setup/admin', {
+      const response = await fetch(`${API_BASE_URL}/setup/admin`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',
@@ -331,7 +333,7 @@ const Setup: React.FC = () => {
             disabled={loading}
             style={{
               padding: '0.75rem 2rem',
-              backgroundColor: loading ? '#6c757d' : '#007bff',
+              backgroundColor: loading ? '#6c757d' : '#51258f',
               color: 'white',
               border: 'none',
               borderRadius: '6px',

frontend/src/pages/ShiftPlans/ShiftPlanCreate.module.css

@@ -107,7 +107,7 @@
 
 .createButton {
   padding: 10px 20px;
-  background-color: #2ecc71;
+  background-color: #51258f;
   color: white;
   border: none;
   border-radius: 4px;
@@ -116,7 +116,7 @@
 }
 
 .createButton:hover {
-  background-color: #27ae60;
+  background-color: #51258f;
 }
 
 .createButton:disabled {

frontend/src/pages/ShiftPlans/ShiftPlanList.tsx

@@ -70,7 +70,7 @@ const ShiftPlanList: React.FC = () => {
         marginBottom: '30px' 
       }}>
         <h1>📅 Schichtpläne</h1>
-        {hasRole(['admin', 'instandhalter']) && (
+        {hasRole(['admin', 'maintenance']) && (
           <Link to="/shift-plans/new">
             <button style={{ 
               padding: '10px 20px', 
@@ -143,7 +143,7 @@ const ShiftPlanList: React.FC = () => {
                 >
                   Anzeigen
                 </button>
-                {hasRole(['admin', 'instandhalter']) && (
+                {hasRole(['admin', 'maintenance']) && (
                   <>
                     <button
                       onClick={() => navigate(`/shift-plans/${plan.id}/edit`)}

frontend/src/pages/ShiftPlans/ShiftPlanView.tsx

@@ -1005,7 +1005,7 @@ const ShiftPlanView: React.FC = () => {
           </div>
         </div>
           <div style={{ display: 'flex', gap: '10px', alignItems: 'center' }}>
-            {shiftPlan.status === 'published' && hasRole(['admin', 'instandhalter']) && (
+            {shiftPlan.status === 'published' && hasRole(['admin', 'maintenance']) && (
             <button
               onClick={handleRecreateAssignments}
               disabled={recreating}
@@ -1076,7 +1076,7 @@ const ShiftPlanView: React.FC = () => {
               </div>
             </div>
             
-            {hasRole(['admin', 'instandhalter']) && (
+            {hasRole(['admin', 'maintenance']) && (
               <div>
                 <button
                   onClick={handlePreviewAssignment}

frontend/src/react-app-env.d.ts

@@ -1 +0,0 @@
-/// <reference types="react-scripts" />

frontend/src/reportWebVitals.ts

@@ -1,15 +0,0 @@
-import { ReportHandler } from 'web-vitals';
-
-const reportWebVitals = (onPerfEntry?: ReportHandler) => {
-  if (onPerfEntry && onPerfEntry instanceof Function) {
-    import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
-      getCLS(onPerfEntry);
-      getFID(onPerfEntry);
-      getFCP(onPerfEntry);
-      getLCP(onPerfEntry);
-      getTTFB(onPerfEntry);
-    });
-  }
-};
-
-export default reportWebVitals;

frontend/src/services/authService.ts

@@ -1,6 +1,6 @@
 // frontend/src/services/authService.ts
 import { Employee } from '../models/Employee';
-const API_BASE = 'http://localhost:3002/api';
+const API_BASE = process.env.REACT_APP_API_BASE_URL || '/api';
 
 export interface LoginRequest {
   email: string;

frontend/src/services/employeeService.ts

@@ -1,7 +1,7 @@
 // frontend/src/services/employeeService.ts
 import { Employee, CreateEmployeeRequest, UpdateEmployeeRequest, EmployeeAvailability } from '../models/Employee';
 
-const API_BASE_URL = 'http://localhost:3002/api';
+const API_BASE_URL = '/api';
 
 const getAuthHeaders = () => {
   const token = localStorage.getItem('token');

frontend/src/services/shiftAssignmentService.ts

@@ -4,9 +4,7 @@ import { Employee, EmployeeAvailability } from '../models/Employee';
 import { authService } from './authService';
 import { AssignmentResult, ScheduleRequest } from '../models/scheduling';
 
-const API_BASE_URL = 'http://localhost:3002/api';
-
-
+const API_BASE_URL = '/api';
 
 // Helper function to get auth headers
 const getAuthHeaders = () => {

frontend/src/services/shiftPlanService.ts

@@ -1,9 +1,9 @@
 // frontend/src/services/shiftPlanService.ts
 import { authService } from './authService';
-import { ShiftPlan, CreateShiftPlanRequest, ScheduledShift, CreateShiftFromTemplateRequest } from '../models/ShiftPlan';
+import { ShiftPlan, CreateShiftPlanRequest } from '../models/ShiftPlan';
 import { TEMPLATE_PRESETS } from '../models/defaults/shiftPlanDefaults';  
 
-const API_BASE = 'http://localhost:3002/api/shift-plans';
+const API_BASE_URL = '/api/shift-plans';
 
 // Helper function to get auth headers
 const getAuthHeaders = () => {
@@ -25,7 +25,7 @@ const handleResponse = async (response: Response) => {
 
 export const shiftPlanService = {
   async getShiftPlans(): Promise<ShiftPlan[]> {
-    const response = await fetch(API_BASE, {
+    const response = await fetch(API_BASE_URL, {
       headers: {
         'Content-Type': 'application/json',
         ...authService.getAuthHeaders()
@@ -50,7 +50,7 @@ export const shiftPlanService = {
   },
 
   async getShiftPlan(id: string): Promise<ShiftPlan> {
-    const response = await fetch(`${API_BASE}/${id}`, {
+    const response = await fetch(`${API_BASE_URL}/${id}`, {
       headers: {
         'Content-Type': 'application/json',
         ...authService.getAuthHeaders()
@@ -69,7 +69,7 @@ export const shiftPlanService = {
   },
 
   async createShiftPlan(plan: CreateShiftPlanRequest): Promise<ShiftPlan> {
-    const response = await fetch(API_BASE, {
+    const response = await fetch(API_BASE_URL, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
@@ -90,7 +90,7 @@ export const shiftPlanService = {
   },
 
   async updateShiftPlan(id: string, plan: Partial<ShiftPlan>): Promise<ShiftPlan> {
-    const response = await fetch(`${API_BASE}/${id}`, {
+    const response = await fetch(`${API_BASE_URL}/${id}`, {
       method: 'PUT',
       headers: {
         'Content-Type': 'application/json',
@@ -111,7 +111,7 @@ export const shiftPlanService = {
   },
 
   async deleteShiftPlan(id: string): Promise<void> {
-    const response = await fetch(`${API_BASE}/${id}`, {
+    const response = await fetch(`${API_BASE_URL}/${id}`, {
       method: 'DELETE',
       headers: {
         'Content-Type': 'application/json',
@@ -130,7 +130,7 @@ export const shiftPlanService = {
 
   // Get specific template or plan
   getTemplate: async (id: string): Promise<ShiftPlan> => {
-    const response = await fetch(`${API_BASE}/${id}`, {
+    const response = await fetch(`${API_BASE_URL}/${id}`, {
       headers: getAuthHeaders()
     });
     return handleResponse(response);
@@ -142,7 +142,7 @@ export const shiftPlanService = {
         console.log('🔄 Attempting to regenerate scheduled shifts...');
         
         // You'll need to add this API endpoint to your backend
-        const response = await fetch(`${API_BASE}/${planId}/regenerate-shifts`, {
+        const response = await fetch(`${API_BASE_URL}/${planId}/regenerate-shifts`, {
         method: 'POST',
         headers: {
             'Content-Type': 'application/json',
@@ -162,7 +162,7 @@ export const shiftPlanService = {
 
   // Create new plan
   createPlan: async (data: CreateShiftPlanRequest): Promise<ShiftPlan> => {
-    const response = await fetch(`${API_BASE}`, {
+    const response = await fetch(`${API_BASE_URL}`, {
       method: 'POST',
       headers: getAuthHeaders(),
       body: JSON.stringify(data),
@@ -177,7 +177,7 @@ export const shiftPlanService = {
     endDate: string;
     isTemplate?: boolean;
   }): Promise<ShiftPlan> => {
-    const response = await fetch(`${API_BASE}/from-preset`, {
+    const response = await fetch(`${API_BASE_URL}/from-preset`, {
       method: 'POST',
       headers: getAuthHeaders(),
       body: JSON.stringify(data),
@@ -204,7 +204,7 @@ export const shiftPlanService = {
     try {
       console.log('🔄 Clearing assignments for plan:', planId);
       
-      const response = await fetch(`${API_BASE}/${planId}/clear-assignments`, {
+      const response = await fetch(`${API_BASE_URL}/${planId}/clear-assignments`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',

frontend/src/setupTests.ts

@@ -1,5 +0,0 @@
-// jest-dom adds custom jest matchers for asserting on DOM nodes.
-// allows you to do things like:
-// expect(element).toHaveTextContent(/react/i)
-// learn more: https://github.com/testing-library/jest-dom
-import '@testing-library/jest-dom';

frontend/src/vite-env.d.ts

@@ -0,0 +1,12 @@
+/// <reference types="vite/client" />
+
+// Define types for environment variables
+interface ImportMetaEnv {
+  readonly VITE_APP_TITLE: string
+  readonly ENABLE_PRO: string
+  // more env variables...
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv
+}

frontend/tsconfig.json

@@ -1,28 +1,38 @@
 {
   "compilerOptions": {
-    "target": "es5",
-    "lib": [
-      "dom",
-      "dom.iterable",
-      "esnext"
-    ],
-    "allowJs": true,
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
     "skipLibCheck": true,
-    "esModuleInterop": true,
-    "allowSyntheticDefaultImports": true,
-    "strict": true,
-    "forceConsistentCasingInFileNames": true,
-    "noFallthroughCasesInSwitch": true,
-    "module": "esnext",
-    "moduleResolution": "node",
+    //"ignoreDeprecations": "6.0",
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
-    "ignoreDeprecations": "6.0",
     "jsx": "react-jsx",
-    "downlevelIteration": true
-  },
-  "include": [
-    "src"
-  ]
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noFallthroughCasesInSwitch": true,
+
+    /* Path mapping (modern approach) */
+    "paths": {
+      "@/*": ["./src/*"],
+      "@/components/*": ["./src/components/*"],
+      "@/pages/*": ["./src/pages/*"],
+      "@/contexts/*": ["./src/contexts/*"],
+      "@/utils/*": ["./src/utils/*"],
+      "@/services/*": ["./src/services/*"],
+      "@/models/*": ["./src/models/*"],
+      "@/design/*": ["./src/design/*"]
+    }
+  },
+  "include": ["src"],
+  "references": [{ "path": "./tsconfig.node.json" }]
 }

frontend/tsconfig.node.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}

frontend/vite.config.ts

@@ -0,0 +1,75 @@
+// vite.config.ts
+import { defineConfig, loadEnv } from 'vite'
+import react from '@vitejs/plugin-react'
+import { resolve } from 'path'
+
+export default defineConfig(({ mode }) => {
+  const isProduction = mode === 'production'
+  const isDevelopment = mode === 'development'
+  
+  const env = loadEnv(mode, process.cwd(), '')
+  
+  // 🆕 WICHTIG: Relative Pfade für Production
+  const clientEnv = {
+    NODE_ENV: mode,
+    ENABLE_PRO: env.ENABLE_PRO || 'false',
+    VITE_APP_TITLE: env.APP_TITLE || 'Shift Planning App',
+    VITE_API_URL: isProduction ? '/api' : 'http://localhost:3002/api',
+  }
+
+  return {
+    plugins: [react()],
+    
+    server: {
+      port: 3003,
+      host: true,
+      open: isDevelopment,
+      proxy: {
+        '/api': {
+          target: 'http://localhost:3002',
+          changeOrigin: true,
+          secure: false,
+        }
+      }
+    },
+    
+    build: {
+      outDir: 'dist',
+      sourcemap: isDevelopment,
+      base: isProduction ? '/' : '/',
+      rollupOptions: {
+        output: {
+          chunkFileNames: 'assets/[name]-[hash].js',
+          entryFileNames: 'assets/[name]-[hash].js',
+          assetFileNames: 'assets/[name]-[hash].[ext]',
+        }
+      },
+      minify: isProduction ? 'terser' : false,
+      terserOptions: isProduction ? {
+        compress: {
+          drop_console: true,
+          drop_debugger: true,
+          pure_funcs: ['console.log', 'console.debug', 'console.info']
+        }
+      } : undefined,
+    },
+    
+    resolve: {
+      alias: {
+        '@': resolve(__dirname, './src'),
+        '@/components': resolve(__dirname, './src/components'),
+        '@/pages': resolve(__dirname, './src/pages'),
+        '@/contexts': resolve(__dirname, './src/contexts'),
+        '@/models': resolve(__dirname, './src/models'),
+        '@/utils': resolve(__dirname, './src/utils'),
+        '@/services': resolve(__dirname, './src/services'),
+        '@/design': resolve(__dirname, './src/design')
+      }
+    },
+    
+    define: Object.keys(clientEnv).reduce((acc, key) => {
+      acc[`import.meta.env.${key}`] = JSON.stringify(clientEnv[key])
+      return acc
+    }, {} as Record<string, string>)
+  }
+})