fix: remove availableContacts state and update contact filtering logic

- Implemented ContactForm component for creating and editing contacts.
- Added ProjectContactSelector component to manage project-specific contacts.
- Updated ProjectForm to include ProjectContactSelector for associating contacts with projects.
- Enhanced Card component with a new CardTitle subcomponent for better structure.
- Updated Navigation to include a link to the contacts page.
- Added translations for contact-related terms in the i18n module.
- Initialized contacts database schema and created necessary tables for contact management.
- Developed queries for CRUD operations on contacts, including linking and unlinking contacts to projects.
- Created a test script to validate contact queries against the database.

.gitignore

@@ -47,4 +47,6 @@ next-env.d.ts
 /kosz
 
 # uploads
-/public/uploads
+/public/uploads
+
+/backups

CONTACTS_SYSTEM_README.md

@@ -0,0 +1,174 @@
+# Contacts Management System
+
+## Overview
+
+A comprehensive contacts management system has been implemented to replace the simple text field for project contacts. This system allows you to:
+
+- **Create and manage a centralized contact database**
+- **Link multiple contacts to each project**
+- **Categorize contacts** (Project contacts, Contractors, Offices, Suppliers, etc.)
+- **Track contact details** (name, phone, email, company, position)
+- **Set primary contacts** for projects
+- **Search and filter** contacts easily
+
+## What Was Implemented
+
+### 1. Database Schema
+
+**New Tables:**
+
+- **`contacts`** - Stores all contact information
+  - `contact_id` (Primary Key)
+  - `name`, `phone`, `email`, `company`, `position`
+  - `contact_type` (project/contractor/office/supplier/other)
+  - `notes`, `is_active`
+  - `created_at`, `updated_at`
+
+- **`project_contacts`** - Junction table linking projects to contacts (many-to-many)
+  - `project_id`, `contact_id` (Composite Primary Key)
+  - `relationship_type`, `is_primary`
+  - `added_at`, `added_by`
+
+### 2. API Endpoints
+
+- **`GET /api/contacts`** - List all contacts (with filters)
+- **`POST /api/contacts`** - Create new contact
+- **`GET /api/contacts/[id]`** - Get contact details
+- **`PUT /api/contacts/[id]`** - Update contact
+- **`DELETE /api/contacts/[id]`** - Delete contact (soft/hard)
+- **`GET /api/projects/[id]/contacts`** - Get project's contacts
+- **`POST /api/projects/[id]/contacts`** - Link contact to project
+- **`DELETE /api/projects/[id]/contacts`** - Unlink contact from project
+- **`PATCH /api/projects/[id]/contacts`** - Set primary contact
+
+### 3. UI Components
+
+- **`ContactForm`** - Create/edit contact form
+- **`/contacts` page** - Full contacts management interface with:
+  - Statistics dashboard
+  - Search and filtering
+  - Contact cards with quick actions
+  - CRUD operations
+- **`ProjectContactSelector`** - Multi-contact selector for projects
+  - View linked contacts
+  - Add/remove contacts
+  - Set primary contact
+  - Real-time search
+
+### 4. Integration
+
+- **Navigation** - "Kontakty" link added to main navigation
+- **ProjectForm** - Contact text field replaced with `ProjectContactSelector`
+- **Translations** - Polish translations added to i18n
+- **Query Functions** - Comprehensive database query functions in `src/lib/queries/contacts.js`
+
+## How to Use
+
+### Initial Setup
+
+1. **Run the migration script** to create the new tables:
+   ```bash
+   node migrate-contacts.mjs
+   ```
+
+2. **Start your development server**:
+   ```bash
+   npm run dev
+   ```
+
+3. **Visit** `http://localhost:3000/contacts` to start adding contacts
+
+### Managing Contacts
+
+1. **Create Contacts**:
+   - Go to `/contacts`
+   - Click "Dodaj kontakt"
+   - Fill in contact details
+   - Select contact type (Project/Contractor/Office/Supplier/Other)
+
+2. **Link Contacts to Projects**:
+   - Edit any project
+   - In the "Kontakty do projektu" section
+   - Click "+ Dodaj kontakt"
+   - Search and add contacts
+   - Set one as primary if needed
+
+3. **View Contact Details**:
+   - Contacts page shows all contacts with:
+     - Contact information (phone, email, company)
+     - Number of linked projects
+     - Contact type badges
+   - Edit or delete contacts as needed
+
+### Contact Types
+
+- **Kontakt projektowy (Project)** - Project-specific contacts
+- **Wykonawca (Contractor)** - Construction contractors
+- **Urząd (Office)** - Government offices, municipalities
+- **Dostawca (Supplier)** - Material suppliers, vendors
+- **Inny (Other)** - Any other type of contact
+
+### Features
+
+- **Search** - Search by name, phone, email, or company
+- **Filter** - Filter by contact type
+- **Statistics** - See breakdown of contacts by type
+- **Multiple Contacts per Project** - Link as many contacts as needed
+- **Primary Contact** - Mark one contact as primary for each project
+- **Bidirectional Links** - See which projects a contact is linked to
+- **Soft Delete** - Deleted contacts are marked inactive, not removed
+
+## Database Migration Notes
+
+- The **old `contact` text field** in the `projects` table is still present
+- It hasn't been removed for backward compatibility
+- You can manually migrate old contact data by:
+  1. Creating contacts from the old text data
+  2. Linking them to the appropriate projects
+  3. The old field will remain for reference
+
+## File Structure
+
+```
+src/
+├── app/
+│   ├── api/
+│   │   ├── contacts/
+│   │   │   ├── route.js              # List/Create contacts
+│   │   │   └── [id]/
+│   │   │       └── route.js          # Get/Update/Delete contact
+│   │   └── projects/
+│   │       └── [id]/
+│   │           └── contacts/
+│   │               └── route.js      # Link/unlink contacts to project
+│   └── contacts/
+│       └── page.js                   # Contacts management page
+├── components/
+│   ├── ContactForm.js                # Contact form component
+│   └── ProjectContactSelector.js    # Project contact selector
+└── lib/
+    ├── queries/
+    │   └── contacts.js               # Database query functions
+    └── init-db.js                    # Database schema with new tables
+```
+
+## Future Enhancements
+
+Potential improvements you could add:
+
+- Contact import/export (CSV, Excel)
+- Contact groups or tags
+- Contact activity history
+- Email integration
+- Contact notes and history
+- Duplicate contact detection
+- Contact merge functionality
+- Advanced relationship types
+- Contact sharing between projects
+- Contact reminders/follow-ups
+
+## Support
+
+The old contact text field remains in the database, so no existing data is lost. You can gradually migrate to the new system at your own pace.
+
+Enjoy your new contacts management system! 🎉

DEPLOYMENT_GUIDE_TEMPLATE.md

@@ -0,0 +1,410 @@
+# Docker Git Deployment Strategy - Quick Guide
+
+A proven deployment strategy for Next.js apps (or any Node.js app) on a VPS using Docker with Git integration.
+
+## Quick Overview
+
+**Strategy**: Docker containers + Git repo integration + Zero-downtime deployments  
+**Benefits**: Reproducible builds, easy rollbacks, consistent environments  
+**Time to setup**: ~30 minutes
+
+---
+
+## Step 1: Create Docker Files
+
+### `Dockerfile` (Production)
+```dockerfile
+FROM node:22.11.0
+
+# Set timezone (adjust for your region)
+ENV TZ=Europe/Warsaw
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+# Install git for repo cloning
+RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Support building from Git repo
+ARG GIT_REPO_URL
+ARG GIT_BRANCH=main
+ARG GIT_COMMIT
+
+# Clone from git OR use local files
+RUN if [ -n "$GIT_REPO_URL" ]; then \
+    git clone --branch ${GIT_BRANCH} ${GIT_REPO_URL} . && \
+    if [ -n "$GIT_COMMIT" ]; then git checkout ${GIT_COMMIT}; fi; \
+  fi
+
+COPY package*.json ./
+RUN npm install
+
+COPY . .
+RUN npm run build
+
+# Copy entrypoint script
+COPY docker-entrypoint.sh /docker-entrypoint.sh
+RUN chmod +x /docker-entrypoint.sh
+
+EXPOSE 3000
+ENTRYPOINT ["/docker-entrypoint.sh"]
+```
+
+### `docker-entrypoint.sh`
+```bash
+#!/bin/bash
+echo "🚀 Starting application..."
+
+# Create necessary directories
+mkdir -p /app/data
+mkdir -p /app/public/uploads
+
+# Initialize database, create admin, etc.
+node scripts/init-setup.js
+
+# Start the app
+exec npm start
+```
+
+### `docker-compose.prod.yml`
+```yaml
+version: "3.9"
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        - GIT_REPO_URL=${GIT_REPO_URL}
+        - GIT_BRANCH=${GIT_BRANCH:-main}
+        - GIT_COMMIT=${GIT_COMMIT}
+    ports:
+      - "3001:3000"  # HOST:CONTAINER
+    volumes:
+      - ./data:/app/data              # Persist database
+      - ./uploads:/app/public/uploads # Persist files
+    environment:
+      - NODE_ENV=production
+      - TZ=Europe/Warsaw
+      - NEXTAUTH_SECRET=${NEXTAUTH_SECRET}
+      - NEXTAUTH_URL=${NEXTAUTH_URL}
+      - AUTH_TRUST_HOST=true
+    restart: unless-stopped
+```
+
+---
+
+## Step 2: Create Deployment Script
+
+### `deploy.sh` (Linux/Mac)
+```bash
+#!/bin/bash
+set -e
+
+GIT_REPO_URL=${1:-""}
+GIT_BRANCH=${2:-"main"}
+GIT_COMMIT=${3:-""}
+
+# Load environment variables
+if [ -f .env.production ]; then
+    export $(grep -v '^#' .env.production | xargs)
+fi
+
+# Validate critical vars
+if [ -z "$NEXTAUTH_SECRET" ] || [ -z "$NEXTAUTH_URL" ]; then
+    echo "ERROR: Set NEXTAUTH_SECRET and NEXTAUTH_URL in .env.production"
+    exit 1
+fi
+
+# Build from Git or local files
+if [ -z "$GIT_REPO_URL" ]; then
+    echo "Building from local files..."
+    docker-compose -f docker-compose.prod.yml build
+else
+    echo "Building from git: $GIT_REPO_URL (branch: $GIT_BRANCH)"
+    GIT_REPO_URL=$GIT_REPO_URL GIT_BRANCH=$GIT_BRANCH GIT_COMMIT=$GIT_COMMIT \
+    docker-compose -f docker-compose.prod.yml build
+fi
+
+# Deploy
+echo "Deploying..."
+docker-compose -f docker-compose.prod.yml down
+docker-compose -f docker-compose.prod.yml up -d
+
+echo "✅ Deployment completed!"
+echo "Application running at: $NEXTAUTH_URL (port 3001 on host)"
+```
+
+Make it executable:
+```bash
+chmod +x deploy.sh
+```
+
+---
+
+## Step 3: Configure Environment
+
+### `.env.production`
+```bash
+# Generate secret: openssl rand -base64 32
+NEXTAUTH_SECRET=your-super-long-random-secret-at-least-32-chars
+
+# Your public URL
+NEXTAUTH_URL=https://yourdomain.com
+
+NODE_ENV=production
+AUTH_TRUST_HOST=true
+```
+
+**⚠️ NEVER commit `.env.production` to Git!**
+
+---
+
+## Step 4: Setup VPS
+
+### Initial VPS Setup
+```bash
+# SSH to VPS
+ssh user@your-vps-ip
+
+# Install Docker & Docker Compose
+curl -fsSL https://get.docker.com -o get-docker.sh
+sudo sh get-docker.sh
+sudo usermod -aG docker $USER
+sudo apt install docker-compose-plugin
+
+# Logout and login again for docker group to take effect
+exit
+```
+
+### Setup Project Directory
+```bash
+ssh user@your-vps-ip
+
+# Create project directory
+mkdir -p ~/app
+cd ~/app
+
+# Copy deployment files (from local machine):
+# scp docker-compose.prod.yml deploy.sh user@vps-ip:~/app/
+# scp .env.production user@vps-ip:~/app/
+
+# OR clone entire repo if using local file deployment:
+git clone https://your-repo-url.git .
+```
+
+---
+
+## Step 5: Setup Nginx Reverse Proxy
+
+### Install Nginx
+```bash
+sudo apt update
+sudo apt install nginx certbot python3-certbot-nginx
+```
+
+### Configure Nginx
+Create `/etc/nginx/sites-available/yourapp`:
+```nginx
+server {
+    listen 80;
+    server_name yourdomain.com;
+
+    location / {
+        proxy_pass http://localhost:3001;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_cache_bypass $http_upgrade;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+}
+```
+
+Enable site:
+```bash
+sudo ln -s /etc/nginx/sites-available/yourapp /etc/nginx/sites-enabled/
+sudo nginx -t
+sudo systemctl restart nginx
+```
+
+### Setup SSL (HTTPS)
+```bash
+sudo certbot --nginx -d yourdomain.com
+# Follow prompts to get free SSL certificate
+```
+
+---
+
+## Step 6: Deploy!
+
+### Deployment Methods
+
+**Method 1: From Local Files**
+```bash
+cd ~/app
+git pull origin main  # Update code
+./deploy.sh
+```
+
+**Method 2: From Git Repository**
+```bash
+cd ~/app
+./deploy.sh https://git.yourserver.com/user/repo.git main
+```
+
+**Method 3: Specific Commit**
+```bash
+./deploy.sh https://git.yourserver.com/user/repo.git main abc123def
+```
+
+---
+
+## Ongoing Maintenance
+
+### View Logs
+```bash
+docker-compose -f docker-compose.prod.yml logs -f
+```
+
+### Restart App
+```bash
+docker-compose -f docker-compose.prod.yml restart
+```
+
+### Full Rebuild (for Dockerfile changes)
+```bash
+docker-compose -f docker-compose.prod.yml down
+docker-compose -f docker-compose.prod.yml build --no-cache
+docker-compose -f docker-compose.prod.yml up -d
+```
+
+### Check Container Status
+```bash
+docker-compose -f docker-compose.prod.yml ps
+docker-compose -f docker-compose.prod.yml exec app date  # Check timezone
+```
+
+### Backup Data
+```bash
+# Automated daily database backups are scheduled at 2 AM
+# Backups are stored in ./backups/ directory, keeping last 30
+# Check backup logs: docker-compose -f docker-compose.prod.yml exec app cat /app/data/backup.log
+
+# Manual backup (if needed)
+tar -czf backup-$(date +%Y%m%d).tar.gz data/ uploads/
+
+# Download backups to local machine
+scp user@vps-ip:~/app/backups/backup-*.sqlite ./local-backups/
+```
+
+### Rollback to Previous Version
+```bash
+# If using Git commits
+./deploy.sh https://git.yourserver.com/user/repo.git main PREVIOUS_COMMIT_HASH
+```
+
+---
+
+## Troubleshooting
+
+### Container won't start
+```bash
+docker-compose -f docker-compose.prod.yml logs app
+docker-compose -f docker-compose.prod.yml exec app sh  # Get shell inside container
+```
+
+### Timezone issues
+- Make sure `TZ` env var is set in docker-compose
+- Rebuild image: timezone config is baked in during build
+- Verify: `docker-compose -f docker-compose.prod.yml exec app date`
+
+### Permission issues with volumes
+```bash
+# Fix ownership
+sudo chown -R $USER:$USER data/ uploads/
+```
+
+### Port already in use
+```bash
+# Check what's using port 3001
+sudo netstat -tulpn | grep 3001
+# Change port in docker-compose.prod.yml if needed
+```
+
+---
+
+## Security Checklist
+
+- [ ] Strong `NEXTAUTH_SECRET` generated (min 32 chars)
+- [ ] `.env.production` has secure permissions: `chmod 600 .env.production`
+- [ ] Firewall configured: `sudo ufw allow 80,443/tcp`
+- [ ] SSL certificate installed via Certbot
+- [ ] Regular security updates: `sudo apt update && sudo apt upgrade`
+- [ ] Docker images updated periodically
+- [ ] Database backups automated
+- [ ] Git credentials NOT stored in environment files
+
+---
+
+## Quick Reference
+
+```bash
+# Deploy from Git
+./deploy.sh https://git.server.com/user/repo.git main
+
+# Deploy from local files
+git pull && ./deploy.sh
+
+# View logs
+docker-compose -f docker-compose.prod.yml logs -f
+
+# Restart
+docker-compose -f docker-compose.prod.yml restart
+
+# Rebuild completely
+docker-compose -f docker-compose.prod.yml down
+docker-compose -f docker-compose.prod.yml build --no-cache
+docker-compose -f docker-compose.prod.yml up -d
+
+# Backup
+tar -czf backup-$(date +%Y%m%d).tar.gz data/ uploads/
+```
+
+---
+
+## Key Advantages of This Strategy
+
+✅ **Git Integration**: Deploy specific commits, branches, or tags  
+✅ **Reproducible**: Same build every time  
+✅ **Easy Rollbacks**: Just deploy previous commit  
+✅ **Isolated**: Container doesn't pollute host system  
+✅ **Persistent Data**: Volumes survive container rebuilds  
+✅ **Zero-Config Deployment**: Clone and run `./deploy.sh`  
+✅ **Works Offline**: Can build from local files without Git  
+✅ **Auto-Restart**: Container restarts on crash or reboot  
+
+---
+
+## Notes to Future Self
+
+1. **Always use volumes** for data persistence (database, uploads)
+2. **Timezone matters**: Set it in both Dockerfile and docker-compose
+3. **Rebuild vs Restart**: Dockerfile changes need rebuild, code changes just restart
+4. **Port mapping**: Be consistent (I use 3001:3000 - HOST:CONTAINER)
+5. **Environment secrets**: Never commit, always use `.env.production`
+6. **Nginx**: Don't forget to setup reverse proxy and SSL
+7. **Git auth**: For private repos, use SSH keys or tokens in URL
+8. **Test locally first**: Use `docker-compose.yml` with `Dockerfile.dev`
+9. **Monitor logs**: Set up log rotation if app is chatty
+10. **Automate backups**: Cron job for daily database/file backups
+
+---
+
+**Time to deploy a new app with this strategy: ~20 minutes** ⚡
+
+Copy these files, adjust for your app (mainly environment variables and init scripts), and you're production-ready!

Dockerfile

@@ -5,8 +5,8 @@ FROM node:22.11.0
 ENV TZ=Europe/Warsaw
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
-# Install git
-RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+# Install git and cron
+RUN apt-get update && apt-get install -y git cron && rm -rf /var/lib/apt/lists/*
 
 # Set the working directory
 WORKDIR /app

Dockerfile.dev

@@ -5,8 +5,8 @@ FROM node:22.11.0
 ENV TZ=Europe/Warsaw
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
-# Install git for development
-RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+# Install git and cron for development
+RUN apt-get update && apt-get install -y git cron && rm -rf /var/lib/apt/lists/*
 
 # Set the working directory
 WORKDIR /app

RADICALE_SYNC_README.md

@@ -0,0 +1,157 @@
+# Radicale CardDAV Sync Integration
+
+This application now automatically syncs contacts to a Radicale CardDAV server whenever contacts are created, updated, or deleted.
+
+## Features
+
+- ✅ **Automatic Sync** - Contacts are automatically synced when created or updated
+- ✅ **Automatic Deletion** - Contacts are removed from Radicale when soft/hard deleted
+- ✅ **Non-Blocking** - Sync happens asynchronously without slowing down the API
+- ✅ **Optional** - Sync is disabled by default, enable by configuring environment variables
+- ✅ **VCARD 3.0** - Generates standard VCARD format with full contact details
+
+## Setup
+
+### 1. Configure Environment Variables
+
+Add these to your `.env.local` or production environment:
+
+```bash
+RADICALE_URL=http://localhost:5232
+RADICALE_USERNAME=your_username
+RADICALE_PASSWORD=your_password
+```
+
+**Note:** If these variables are not set, sync will be disabled and the app will work normally.
+
+### 2. Radicale Server Setup
+
+Make sure your Radicale server:
+- Is accessible from your application server
+- Has a user created with the credentials you configured
+- Has a contacts collection at: `{username}/contacts/`
+
+### 3. One-Time Initial Sync
+
+To sync all existing contacts to Radicale:
+
+```bash
+node export-contacts-to-radicale.mjs
+```
+
+This script will:
+- Prompt for Radicale URL, username, and password
+- Export all active contacts as VCARDs
+- Upload them to your Radicale server
+
+## How It Works
+
+### When Creating a Contact
+
+```javascript
+// POST /api/contacts
+const contact = createContact(data);
+
+// Sync to Radicale asynchronously (non-blocking)
+syncContactAsync(contact);
+
+return NextResponse.json(contact);
+```
+
+### When Updating a Contact
+
+```javascript
+// PUT /api/contacts/[id]
+const contact = updateContact(contactId, data);
+
+// Sync updated contact to Radicale
+syncContactAsync(contact);
+
+return NextResponse.json(contact);
+```
+
+### When Deleting a Contact
+
+```javascript
+// DELETE /api/contacts/[id]
+deleteContact(contactId);
+
+// Delete from Radicale asynchronously
+deleteContactAsync(contactId);
+
+return NextResponse.json({ message: "Contact deleted" });
+```
+
+## VCARD Format
+
+Each contact is exported with the following fields:
+
+- **UID**: `contact-{id}@panel-app`
+- **FN/N**: Full name and structured name
+- **ORG**: Company
+- **TITLE**: Position/Title
+- **TEL**: Phone numbers (multiple supported - first as WORK, others as CELL)
+- **EMAIL**: Email address
+- **NOTE**: Contact type + notes
+- **CATEGORIES**: Based on contact type (Projekty, Wykonawcy, Urzędy, etc.)
+- **REV**: Last modified timestamp
+
+## VCARD Storage Path
+
+VCARDs are stored at:
+```
+{RADICALE_URL}/{RADICALE_USERNAME}/contacts/contact-{id}.vcf
+```
+
+Example:
+```
+http://localhost:5232/admin/contacts/contact-123.vcf
+```
+
+## Troubleshooting
+
+### Sync Not Working
+
+1. Check environment variables are set correctly
+2. Verify Radicale server is accessible
+3. Check application logs for sync errors
+4. Test manually with the export script
+
+### Check Sync Status
+
+Sync operations are logged to console:
+```
+✅ Synced contact 123 to Radicale
+❌ Failed to sync contact 456 to Radicale: 401 - Unauthorized
+```
+
+### Disable Sync
+
+Simply remove or comment out the Radicale environment variables:
+```bash
+# RADICALE_URL=
+# RADICALE_USERNAME=
+# RADICALE_PASSWORD=
+```
+
+## Files
+
+- **`src/lib/radicale-sync.js`** - Main sync utility with VCARD generation
+- **`src/app/api/contacts/route.js`** - Integrated sync on create
+- **`src/app/api/contacts/[id]/route.js`** - Integrated sync on update/delete
+- **`export-contacts-to-radicale.mjs`** - One-time bulk export script
+
+## Security Notes
+
+- ⚠️ Store credentials securely in environment variables
+- ⚠️ Use HTTPS for production Radicale servers
+- ⚠️ Consider using environment-specific credentials
+- ⚠️ Sync happens in background - errors won't block API responses
+
+## Future Enhancements
+
+- Bi-directional sync (import changes from Radicale)
+- Batch sync operations
+- Sync queue with retry logic
+- Webhook notifications for sync status
+- Admin UI to trigger manual sync

backup-db.mjs

@@ -0,0 +1,61 @@
+import Database from "better-sqlite3";
+import fs from "fs";
+import path from "path";
+
+const dbPath = "data/database.sqlite";
+const backupDir = "backups";
+
+// Ensure backup directory exists
+if (!fs.existsSync(backupDir)) {
+    fs.mkdirSync(backupDir);
+}
+
+// Generate timestamp for backup filename
+const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, 19);
+const backupPath = path.join(backupDir, `backup-${timestamp}.sqlite`);
+
+// Create backup by copying the database file
+fs.copyFileSync(dbPath, backupPath);
+
+console.log(`✅ Backup created: ${backupPath}`);
+
+// Send notification if configured
+try {
+    const { createNotification, NOTIFICATION_TYPES } = await import("./src/lib/notifications.js");
+    const db = (await import("./src/lib/db.js")).default;
+    
+    const setting = db.prepare("SELECT value FROM settings WHERE key = 'backup_notification_user_id'").get();
+    if (setting && setting.value) {
+        const userId = setting.value;
+        await createNotification({
+            userId,
+            type: NOTIFICATION_TYPES.SYSTEM_ANNOUNCEMENT,
+            title: "Database Backup Completed",
+            message: `Daily database backup completed successfully. Backup file: ${backupPath}`,
+            priority: "normal"
+        });
+        console.log(`📢 Notification sent to user ${userId}`);
+    }
+} catch (error) {
+    console.error("Failed to send backup notification:", error);
+}
+
+// Cleanup: keep only last 30 backups
+const files = fs.readdirSync(backupDir)
+    .filter(f => f.startsWith('backup-'))
+    .map(f => ({
+        name: f,
+        path: path.join(backupDir, f),
+        mtime: fs.statSync(path.join(backupDir, f)).mtime
+    }))
+    .sort((a, b) => b.mtime - a.mtime); // Sort by modification time, newest first
+
+if (files.length > 30) {
+    const toDelete = files.slice(30);
+    toDelete.forEach(f => {
+        fs.unlinkSync(f.path);
+        console.log(`🗑️ Deleted old backup: ${f.name}`);
+    });
+}
+
+console.log(`📁 Total backups kept: ${Math.min(files.length, 30)}`);

check-contacts.mjs

@@ -0,0 +1,22 @@
+import db from './src/lib/db.js';
+
+console.log('Checking contacts in database...\n');
+
+const contacts = db.prepare('SELECT contact_id, name, phone, email, is_active, contact_type FROM contacts LIMIT 10').all();
+
+console.log(`Total contacts found: ${contacts.length}\n`);
+
+if (contacts.length > 0) {
+	console.log('Sample contacts:');
+	contacts.forEach(c => {
+		console.log(`  ID: ${c.contact_id}, Name: ${c.name}, Phone: ${c.phone || 'N/A'}, Email: ${c.email || 'N/A'}, Active: ${c.is_active}, Type: ${c.contact_type}`);
+	});
+} else {
+	console.log('No contacts found in database!');
+}
+
+const activeCount = db.prepare('SELECT COUNT(*) as count FROM contacts WHERE is_active = 1').get();
+console.log(`\nActive contacts: ${activeCount.count}`);
+
+const totalCount = db.prepare('SELECT COUNT(*) as count FROM contacts').get();
+console.log(`Total contacts: ${totalCount.count}`);

docker-compose.prod.yml

@@ -14,6 +14,7 @@ services:
     volumes:
       - ./data:/app/data
       - ./uploads:/app/public/uploads
+      - ./backups:/app/backups
     environment:
       - NODE_ENV=production
       - TZ=Europe/Warsaw

docker-compose.yml

@@ -11,6 +11,7 @@ services:
       - .:/app
       - /app/node_modules
       - ./data:/app/data
+      - ./backups:/app/backups
     environment:
       - NODE_ENV=development
       - TZ=Europe/Warsaw

docker-entrypoint-dev.sh

@@ -20,6 +20,13 @@ chmod -R 755 /app/public/uploads
 echo "🔧 Setting up admin account..."
 node scripts/create-admin.js
 
+# Set up daily backup cron job (runs at 2 AM daily)
+echo "⏰ Setting up daily backup cron job..."
+echo "0 2 * * * cd /app && node backup-db.mjs >> /app/data/backup.log 2>&1" > /etc/cron.d/backup-cron
+chmod 0644 /etc/cron.d/backup-cron
+crontab /etc/cron.d/backup-cron
+service cron start
+
 # Start the development server
 echo "✅ Starting development server..."
 exec npm run dev

docker-entrypoint.sh

@@ -24,6 +24,13 @@ node scripts/create-admin.js
 echo "🔄 Running database migrations..."
 ./run-migrations.sh
 
+# Set up daily backup cron job (runs at 2 AM daily)
+echo "⏰ Setting up daily backup cron job..."
+echo "0 2 * * * cd /app && /usr/local/bin/node backup-db.mjs >> /app/data/backup.log 2>&1" > /etc/cron.d/backup-cron
+chmod 0644 /etc/cron.d/backup-cron
+crontab /etc/cron.d/backup-cron
+service cron start
+
 # Start the application
 echo "✅ Starting production server..."
 exec npm start

export-contacts-to-radicale.mjs

@@ -0,0 +1,272 @@
+#!/usr/bin/env node
+
+/**
+ * One-time script to export all contacts as VCARDs and upload to Radicale
+ * Usage: node export-contacts-to-radicale.mjs
+ */
+
+import db from './src/lib/db.js';
+import readline from 'readline';
+import { createInterface } from 'readline';
+
+// VCARD generation helper
+function generateVCard(contact) {
+	const lines = ['BEGIN:VCARD', 'VERSION:3.0'];
+	
+	// UID - unique identifier
+	lines.push(`UID:contact-${contact.contact_id}@panel-app`);
+	
+	// Name (FN = Formatted Name, N = Structured Name)
+	if (contact.name) {
+		lines.push(`FN:${escapeVCardValue(contact.name)}`);
+		
+		// Try to split name into components (Last;First;Middle;Prefix;Suffix)
+		const nameParts = contact.name.trim().split(/\s+/);
+		if (nameParts.length === 1) {
+			lines.push(`N:${escapeVCardValue(nameParts[0])};;;;`);
+		} else if (nameParts.length === 2) {
+			lines.push(`N:${escapeVCardValue(nameParts[1])};${escapeVCardValue(nameParts[0])};;;`);
+		} else {
+			// More than 2 parts - first is first name, rest is last name
+			const firstName = nameParts[0];
+			const lastName = nameParts.slice(1).join(' ');
+			lines.push(`N:${escapeVCardValue(lastName)};${escapeVCardValue(firstName)};;;`);
+		}
+	}
+	
+	// Organization
+	if (contact.company) {
+		lines.push(`ORG:${escapeVCardValue(contact.company)}`);
+	}
+	
+	// Title/Position
+	if (contact.position) {
+		lines.push(`TITLE:${escapeVCardValue(contact.position)}`);
+	}
+	
+	// Phone numbers - handle multiple phones
+	if (contact.phone) {
+		let phones = [];
+		try {
+			// Try to parse as JSON array
+			const parsed = JSON.parse(contact.phone);
+			phones = Array.isArray(parsed) ? parsed : [contact.phone];
+		} catch {
+			// Fall back to comma-separated or single value
+			phones = contact.phone.includes(',') 
+				? contact.phone.split(',').map(p => p.trim()).filter(p => p)
+				: [contact.phone];
+		}
+		
+		phones.forEach((phone, index) => {
+			if (phone) {
+				// First phone is WORK, others are CELL
+				const type = index === 0 ? 'WORK' : 'CELL';
+				lines.push(`TEL;TYPE=${type},VOICE:${escapeVCardValue(phone)}`);
+			}
+		});
+	}
+	
+	// Email
+	if (contact.email) {
+		lines.push(`EMAIL;TYPE=INTERNET,WORK:${escapeVCardValue(contact.email)}`);
+	}
+	
+	// Notes - combine contact type, position context, and notes
+	const noteParts = [];
+	if (contact.contact_type) {
+		const typeLabels = {
+			project: 'Kontakt projektowy',
+			contractor: 'Wykonawca',
+			office: 'Urząd',
+			supplier: 'Dostawca',
+			other: 'Inny'
+		};
+		noteParts.push(`Typ: ${typeLabels[contact.contact_type] || contact.contact_type}`);
+	}
+	if (contact.notes) {
+		noteParts.push(contact.notes);
+	}
+	if (noteParts.length > 0) {
+		lines.push(`NOTE:${escapeVCardValue(noteParts.join('\\n'))}`);
+	}
+	
+	// Categories based on contact type
+	if (contact.contact_type) {
+		const categories = {
+			project: 'Projekty',
+			contractor: 'Wykonawcy',
+			office: 'Urzędy',
+			supplier: 'Dostawcy',
+			other: 'Inne'
+		};
+		lines.push(`CATEGORIES:${categories[contact.contact_type] || 'Inne'}`);
+	}
+	
+	// Timestamps
+	if (contact.created_at) {
+		const created = new Date(contact.created_at).toISOString().replace(/[-:]/g, '').split('.')[0] + 'Z';
+		lines.push(`REV:${created}`);
+	}
+	
+	lines.push('END:VCARD');
+	
+	return lines.join('\r\n') + '\r\n';
+}
+
+// Escape special characters in VCARD values
+function escapeVCardValue(value) {
+	if (!value) return '';
+	return value
+		.replace(/\\/g, '\\\\')
+		.replace(/;/g, '\\;')
+		.replace(/,/g, '\\,')
+		.replace(/\n/g, '\\n')
+		.replace(/\r/g, '');
+}
+
+// Prompt for input
+function prompt(question) {
+	const rl = createInterface({
+		input: process.stdin,
+		output: process.stdout
+	});
+	
+	return new Promise((resolve) => {
+		rl.question(question, (answer) => {
+			rl.close();
+			resolve(answer);
+		});
+	});
+}
+
+// Upload VCARD to Radicale via CardDAV
+async function uploadToRadicale(vcard, contactId, radicaleUrl, username, password, forceUpdate = false) {
+	const auth = Buffer.from(`${username}:${password}`).toString('base64');
+	
+	// Ensure URL ends with /
+	const baseUrl = radicaleUrl.endsWith('/') ? radicaleUrl : radicaleUrl + '/';
+	
+	// Construct the URL for this specific contact
+	// Format: {base_url}{username}/{addressbook_name}/{contact_id}.vcf
+	const vcardUrl = `${baseUrl}${username}/b576a569-4af7-5812-7ddd-3c7cb8caf692/contact-${contactId}.vcf`;
+	
+	try {
+		const headers = {
+			'Authorization': `Basic ${auth}`,
+			'Content-Type': 'text/vcard; charset=utf-8'
+		};
+		
+		// If not forcing update, only create if doesn't exist
+		if (!forceUpdate) {
+			headers['If-None-Match'] = '*';
+		}
+		
+		const response = await fetch(vcardUrl, {
+			method: 'PUT',
+			headers: headers,
+			body: vcard
+		});
+		
+		// Handle conflict - try again with force update
+		if (response.status === 412 || response.status === 409) {
+			// Conflict - contact already exists, update it instead
+			return await uploadToRadicale(vcard, contactId, radicaleUrl, username, password, true);
+		}
+		
+		if (response.ok || response.status === 201 || response.status === 204) {
+			return { success: true, status: response.status, updated: forceUpdate };
+		} else {
+			const text = await response.text();
+			return { success: false, status: response.status, error: text };
+		}
+	} catch (error) {
+		return { success: false, error: error.message };
+	}
+}
+
+// Main execution
+async function main() {
+	console.log('🚀 Export Contacts to Radicale (CardDAV)\n');
+	console.log('This script will export all active contacts as VCARDs and upload them to your Radicale server.\n');
+	
+	// Get Radicale connection details
+	const radicaleUrl = await prompt('Radicale URL (e.g., http://localhost:5232): ');
+	const username = await prompt('Username: ');
+	const password = await prompt('Password: ');
+	
+	if (!radicaleUrl || !username || !password) {
+		console.error('❌ All fields are required!');
+		process.exit(1);
+	}
+	
+	console.log('\n📊 Fetching contacts from database...\n');
+	
+	// Get all active contacts
+	const contacts = db.prepare(`
+		SELECT * FROM contacts 
+		WHERE is_active = 1 
+		ORDER BY name ASC
+	`).all();
+	
+	if (contacts.length === 0) {
+		console.log('ℹ️  No active contacts found.');
+		process.exit(0);
+	}
+	
+	console.log(`Found ${contacts.length} active contacts\n`);
+	console.log('📤 Uploading to Radicale...\n');
+	
+	let uploaded = 0;
+	let updated = 0;
+	let failed = 0;
+	const errors = [];
+	
+	for (const contact of contacts) {
+		const vcard = generateVCard(contact);
+		const result = await uploadToRadicale(vcard, contact.contact_id, radicaleUrl, username, password);
+        
+		
+		if (result.success) {
+			if (result.updated) {
+				updated++;
+				console.log(`🔄 ${contact.name} (${contact.contact_id}) - updated`);
+			} else {
+				uploaded++;
+				console.log(`✅ ${contact.name} (${contact.contact_id}) - created`);
+			}
+		} else {
+			failed++;
+			const errorMsg = `❌ ${contact.name} (${contact.contact_id}): ${result.error || `HTTP ${result.status}`}`;
+			console.log(errorMsg);
+			errors.push(errorMsg);
+		}
+		
+		// Small delay to avoid overwhelming the server
+		await new Promise(resolve => setTimeout(resolve, 100));
+	}
+	
+	console.log('\n' + '='.repeat(60));
+	console.log('📊 Upload Summary:');
+	console.log(`   ✅ Created: ${uploaded}`);
+	console.log(`   🔄 Updated: ${updated}`);
+	console.log(`   ❌ Failed: ${failed}`);
+	console.log(`   📋 Total: ${contacts.length}`);
+	
+	if (errors.length > 0 && errors.length <= 10) {
+		console.log('\n❌ Failed uploads:');
+		errors.forEach(err => console.log(`   ${err}`));
+	}
+	
+	if (uploaded > 0 || updated > 0) {
+		console.log('\n✨ Success! Your contacts have been exported to Radicale.');
+		console.log(`   Access them at: ${radicaleUrl}`);
+	}
+	
+	console.log('');
+}
+
+main().catch(error => {
+	console.error('❌ Error:', error);
+	process.exit(1);
+});

migrate-add-settings-table.mjs

@@ -0,0 +1,25 @@
+import db from "./src/lib/db.js";
+
+console.log("Adding settings table...");
+
+try {
+    db.exec(`
+        CREATE TABLE IF NOT EXISTS settings (
+            key TEXT PRIMARY KEY,
+            value TEXT NOT NULL,
+            description TEXT,
+            updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
+            updated_by TEXT,
+            FOREIGN KEY (updated_by) REFERENCES users(id)
+        );
+    `);
+
+    db.exec(`
+        INSERT OR IGNORE INTO settings (key, value, description) VALUES 
+        ('backup_notification_user_id', '', 'User ID to receive backup completion notifications');
+    `);
+
+    console.log("✅ Settings table created successfully");
+} catch (error) {
+    console.error("Error creating settings table:", error);
+}

migrate-contacts.mjs

@@ -0,0 +1,46 @@
+import db from './src/lib/db.js';
+import initializeDatabase from './src/lib/init-db.js';
+
+console.log('🚀 Initializing contacts tables...\n');
+
+try {
+	// Run database initialization which will create the new contacts tables
+	initializeDatabase();
+	
+	console.log('✅ Contacts tables created successfully!\n');
+	
+	// Check if there are projects with contact data in the old text field
+	const projectsWithContacts = db.prepare(`
+		SELECT project_id, project_name, contact 
+		FROM projects 
+		WHERE contact IS NOT NULL AND contact != ''
+	`).all();
+	
+	if (projectsWithContacts.length > 0) {
+		console.log(`📋 Found ${projectsWithContacts.length} projects with contact information in the old text field.\n`);
+		console.log('Sample contacts that could be migrated:');
+		projectsWithContacts.slice(0, 5).forEach(p => {
+			console.log(`  - ${p.project_name}: "${p.contact}"`);
+		});
+		console.log('\nℹ️  You can manually create contacts from the /contacts page and link them to projects.');
+		console.log('   The old contact field will remain in the database for reference.\n');
+	} else {
+		console.log('ℹ️  No existing contact data found in projects.\n');
+	}
+	
+	// Show table statistics
+	const contactsCount = db.prepare('SELECT COUNT(*) as count FROM contacts').get();
+	const projectContactsCount = db.prepare('SELECT COUNT(*) as count FROM project_contacts').get();
+	
+	console.log('📊 Database Statistics:');
+	console.log(`   - Contacts: ${contactsCount.count}`);
+	console.log(`   - Project-Contact Links: ${projectContactsCount.count}`);
+	console.log('\n✨ Migration complete! You can now:');
+	console.log('   1. Visit /contacts to manage your contacts');
+	console.log('   2. Add/edit projects to link contacts');
+	console.log('   3. View linked contacts in project details\n');
+	
+} catch (error) {
+	console.error('❌ Error during migration:', error);
+	process.exit(1);
+}

migrate-project-contacts.mjs

@@ -0,0 +1,188 @@
+import db from './src/lib/db.js';
+import initializeDatabase from './src/lib/init-db.js';
+
+console.log('🚀 Migrating contact data from projects...\n');
+
+try {
+	// Run database initialization to ensure tables exist
+	initializeDatabase();
+	
+	console.log('✅ Database tables verified\n');
+	
+	// Get all projects with contact data
+	const projectsWithContacts = db.prepare(`
+		SELECT project_id, project_name, contact 
+		FROM projects 
+		WHERE contact IS NOT NULL AND contact != '' AND TRIM(contact) != ''
+	`).all();
+	
+	if (projectsWithContacts.length === 0) {
+		console.log('ℹ️  No contact data found in projects to migrate.\n');
+		process.exit(0);
+	}
+	
+	console.log(`📋 Found ${projectsWithContacts.length} projects with contact information\n`);
+	
+	let created = 0;
+	let linked = 0;
+	let skipped = 0;
+	
+	const createContact = db.prepare(`
+		INSERT INTO contacts (name, phone, email, contact_type, notes, is_active)
+		VALUES (?, ?, ?, 'project', ?, 1)
+	`);
+	
+	const linkContact = db.prepare(`
+		INSERT OR IGNORE INTO project_contacts (project_id, contact_id, is_primary, relationship_type)
+		VALUES (?, ?, 1, 'general')
+	`);
+	
+	// Process each project
+	for (const project of projectsWithContacts) {
+		try {
+			const contactText = project.contact.trim();
+			
+			// Parse contact information - common formats:
+			// "Jan Kowalski, tel. 123-456-789"
+			// "Jan Kowalski 123-456-789"
+			// "123-456-789"
+			// "Jan Kowalski"
+			
+			let name = '';
+			let phone = '';
+			let email = '';
+			let notes = '';
+			
+			// Try to extract email
+			const emailPattern = /([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/;
+			const emailMatch = contactText.match(emailPattern);
+			if (emailMatch) {
+				email = emailMatch[1].trim();
+			}
+			
+			// Try to extract phone number (various formats)
+			const phonePatterns = [
+				/(?:\+?48)?[\s-]?(\d{3}[\s-]?\d{3}[\s-]?\d{3})/,  // Polish: 123-456-789, 123 456 789, +48 123456789
+				/(?:\+?48)?[\s-]?(\d{9})/,                          // 9 digits
+				/tel\.?\s*[:.]?\s*([+\d\s-]+)/i,                    // tel. 123-456-789
+				/phone\s*[:.]?\s*([+\d\s-]+)/i,                     // phone: 123-456-789
+				/(\d{3}[-\s]?\d{3}[-\s]?\d{3})/,                    // Generic phone pattern
+			];
+			
+			for (const pattern of phonePatterns) {
+				const match = contactText.match(pattern);
+				if (match) {
+					phone = match[1] || match[0];
+					phone = phone.replace(/\s+/g, ' ').trim();
+					break;
+				}
+			}
+			
+			// Extract name (text before phone/email or comma)
+			let textForName = contactText;
+			
+			if (phone) {
+				// Remove phone from text to get name
+				textForName = textForName.replace(phone, '');
+			}
+			if (email) {
+				// Remove email from text to get name
+				textForName = textForName.replace(email, '');
+			}
+			
+			// Remove common prefixes like "tel.", "phone:", "email:", commas, etc.
+			name = textForName.replace(/tel\.?|phone:?|email:?|e-mail:?|,/gi, '').trim();
+			
+			// Clean up name
+			name = name.replace(/^[,\s-]+|[,\s-]+$/g, '').trim();
+			
+			// If we couldn't extract structured data, use project name and put original text in notes
+			if (!phone && !email) {
+				// No structured contact info found, put everything in notes
+				notes = `${contactText}`;
+				name = project.project_name;
+			} else if (!name) {
+				// We have phone/email but no clear name
+				name = project.project_name;
+			}
+			
+			// Check if this contact already exists (by name, phone, or email)
+			let existingContact = null;
+			if (phone) {
+				existingContact = db.prepare(`
+					SELECT contact_id FROM contacts 
+					WHERE phone LIKE ? OR phone LIKE ?
+				`).get(`%${phone}%`, `%${phone.replace(/\s/g, '')}%`);
+			}
+			
+			if (!existingContact && email) {
+				existingContact = db.prepare(`
+					SELECT contact_id FROM contacts 
+					WHERE LOWER(email) = LOWER(?)
+				`).get(email);
+			}
+			
+			if (!existingContact && name && name !== project.project_name) {
+				existingContact = db.prepare(`
+					SELECT contact_id FROM contacts 
+					WHERE LOWER(name) = LOWER(?)
+				`).get(name);
+			}
+			
+			let contactId;
+			
+			if (existingContact) {
+				contactId = existingContact.contact_id;
+				console.log(`  ♻️  Using existing contact "${name}" for project "${project.project_name}"`);
+			} else {
+				// Create new contact
+				const result = createContact.run(
+					name,
+					phone || null,
+					email || null,
+					notes || `Przeniesiono z projektu: ${project.project_name}`
+				);
+				contactId = result.lastInsertRowid;
+				created++;
+				
+				const contactInfo = [];
+				if (phone) contactInfo.push(`📞 ${phone}`);
+				if (email) contactInfo.push(`📧 ${email}`);
+				const infoStr = contactInfo.length > 0 ? ` (${contactInfo.join(', ')})` : '';
+				
+				console.log(`  ✨ Created contact "${name}"${infoStr} for project "${project.project_name}"`);
+			}
+			
+			// Link contact to project
+			linkContact.run(project.project_id, contactId);
+			linked++;
+			
+		} catch (error) {
+			console.error(`  ❌ Error processing project "${project.project_name}":`, error.message);
+			skipped++;
+		}
+	}
+	
+	console.log('\n📊 Migration Summary:');
+	console.log(`   - Contacts created: ${created}`);
+	console.log(`   - Project-contact links created: ${linked}`);
+	console.log(`   - Projects skipped: ${skipped}`);
+	console.log(`   - Total projects processed: ${projectsWithContacts.length}`);
+	
+	// Show final statistics
+	const contactsCount = db.prepare('SELECT COUNT(*) as count FROM contacts').get();
+	const projectContactsCount = db.prepare('SELECT COUNT(*) as count FROM project_contacts').get();
+	
+	console.log('\n📈 Current Database Statistics:');
+	console.log(`   - Total contacts: ${contactsCount.count}`);
+	console.log(`   - Total project-contact links: ${projectContactsCount.count}`);
+	
+	console.log('\n✨ Migration complete!');
+	console.log('   - Visit /contacts to view and manage your contacts');
+	console.log('   - Edit projects to see linked contacts');
+	console.log('   - The old contact text field is preserved for reference\n');
+	
+} catch (error) {
+	console.error('❌ Error during migration:', error);
+	process.exit(1);
+}

src/app/admin/settings/page.js

@@ -0,0 +1,183 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { useSession } from "next-auth/react";
+import { useRouter } from "next/navigation";
+import Link from "next/link";
+
+export default function AdminSettingsPage() {
+	const { data: session, status } = useSession();
+	const router = useRouter();
+	const [settings, setSettings] = useState([]);
+	const [loading, setLoading] = useState(true);
+	const [saving, setSaving] = useState(false);
+	const [users, setUsers] = useState([]);
+
+	// Redirect if not admin
+	useEffect(() => {
+		if (status === "loading") return;
+		if (!session || session.user.role !== "admin") {
+			router.push("/");
+			return;
+		}
+		fetchSettings();
+		fetchUsers();
+	}, [session, status, router]);
+
+	const fetchSettings = async () => {
+		try {
+			const response = await fetch("/api/admin/settings");
+			if (response.ok) {
+				const data = await response.json();
+				setSettings(data);
+			}
+		} catch (error) {
+			console.error("Error fetching settings:", error);
+		} finally {
+			setLoading(false);
+		}
+	};
+
+	const fetchUsers = async () => {
+		try {
+			const response = await fetch("/api/admin/users");
+			if (response.ok) {
+				const data = await response.json();
+				setUsers(data);
+			}
+		} catch (error) {
+			console.error("Error fetching users:", error);
+		}
+	};
+
+	const updateSetting = async (key, value) => {
+		setSaving(true);
+		try {
+			const response = await fetch("/api/admin/settings", {
+				method: "PUT",
+				headers: {
+					"Content-Type": "application/json",
+				},
+				body: JSON.stringify({ key, value }),
+			});
+
+			if (response.ok) {
+				// Update local state
+				setSettings(prev =>
+					prev.map(setting =>
+						setting.key === key ? { ...setting, value } : setting
+					)
+				);
+				alert("Setting updated successfully!");
+			} else {
+				alert("Failed to update setting");
+			}
+		} catch (error) {
+			console.error("Error updating setting:", error);
+			alert("Error updating setting");
+		} finally {
+			setSaving(false);
+		}
+	};
+
+	const handleBackupUserChange = (userId) => {
+		updateSetting("backup_notification_user_id", userId);
+	};
+
+	if (status === "loading" || loading) {
+		return (
+			<div className="min-h-screen flex items-center justify-center">
+				<div className="text-lg">Loading...</div>
+			</div>
+		);
+	}
+
+	if (!session || session.user.role !== "admin") {
+		return (
+			<div className="min-h-screen flex items-center justify-center">
+				<div className="text-center">
+					<h1 className="text-2xl font-bold text-gray-800 mb-4">
+						Access Denied
+					</h1>
+					<p className="text-gray-600 mb-6">
+						You need admin privileges to access this page.
+					</p>
+					<Link
+						href="/"
+						className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded"
+					>
+						Go Home
+					</Link>
+				</div>
+			</div>
+		);
+	}
+
+	const backupUserSetting = settings.find(s => s.key === "backup_notification_user_id");
+
+	return (
+		<div className="min-h-screen bg-gray-50 py-8">
+			<div className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8">
+				<div className="bg-white shadow rounded-lg">
+					<div className="px-6 py-4 border-b border-gray-200">
+						<div className="flex items-center justify-between">
+							<h1 className="text-2xl font-bold text-gray-900">
+								Admin Settings
+							</h1>
+							<Link
+								href="/admin"
+								className="text-blue-600 hover:text-blue-800"
+							>
+								← Back to Admin
+							</Link>
+						</div>
+					</div>
+
+					<div className="p-6 space-y-6">
+						{/* Backup Notifications Setting */}
+						<div className="border rounded-lg p-4">
+							<h3 className="text-lg font-medium text-gray-900 mb-2">
+								Backup Notifications
+							</h3>
+							<p className="text-sm text-gray-600 mb-4">
+								Select which user should receive notifications when daily database backups are completed.
+							</p>
+							<div className="space-y-2">
+								<label className="block text-sm font-medium text-gray-700">
+									Notification Recipient
+								</label>
+								<select
+									value={backupUserSetting?.value || ""}
+									onChange={(e) => handleBackupUserChange(e.target.value)}
+									disabled={saving}
+									className="mt-1 block w-full pl-3 pr-10 py-2 text-base border-gray-300 focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm rounded-md"
+								>
+									<option value="">No notifications</option>
+									{users.map((user) => (
+										<option key={user.id} value={user.id}>
+											{user.name} ({user.username}) - {user.role}
+										</option>
+									))}
+								</select>
+								{saving && (
+									<p className="text-sm text-blue-600">Saving...</p>
+								)}
+							</div>
+						</div>
+
+						{/* Future settings can be added here */}
+						<div className="border rounded-lg p-4">
+							<h3 className="text-lg font-medium text-gray-900 mb-2">
+								System Information
+							</h3>
+							<p className="text-sm text-gray-600">
+								Daily database backups run automatically at 2 AM and keep the last 30 backups.
+								Backups are stored in the <code className="bg-gray-100 px-1 rounded">./backups/</code> directory.
+							</p>
+						</div>
+					</div>
+				</div>
+			</div>
+		</div>
+	);
+}

src/app/api/admin/settings/route.js

@@ -0,0 +1,52 @@
+import { NextResponse } from "next/server";
+import { withAdminAuth } from "@/lib/middleware/auth";
+import db from "@/lib/db";
+
+// GET: Get all settings
+async function getSettingsHandler() {
+	try {
+		const settings = db.prepare("SELECT * FROM settings ORDER BY key").all();
+		return NextResponse.json(settings);
+	} catch (error) {
+		console.error("Error fetching settings:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch settings" },
+			{ status: 500 }
+		);
+	}
+}
+
+// PUT: Update a setting
+async function updateSettingHandler(request) {
+	try {
+		const { key, value } = await request.json();
+
+		if (!key || value === undefined) {
+			return NextResponse.json(
+				{ error: "Key and value are required" },
+				{ status: 400 }
+			);
+		}
+
+		const updatedBy = request.user.id;
+
+		const stmt = db.prepare(`
+			INSERT OR REPLACE INTO settings (key, value, updated_at, updated_by)
+			VALUES (?, ?, CURRENT_TIMESTAMP, ?)
+		`);
+
+		stmt.run(key, value, updatedBy);
+
+		return NextResponse.json({ success: true });
+	} catch (error) {
+		console.error("Error updating setting:", error);
+		return NextResponse.json(
+			{ error: "Failed to update setting" },
+			{ status: 500 }
+		);
+	}
+}
+
+// Protected routes - require admin authentication
+export const GET = withAdminAuth(getSettingsHandler);
+export const PUT = withAdminAuth(updateSettingHandler);

src/app/api/contacts/[id]/projects/route.js

@@ -0,0 +1,40 @@
+import { NextResponse } from "next/server";
+import db from "@/lib/db";
+import { withAuth } from "@/lib/middleware/auth";
+
+// GET /api/contacts/[id]/projects - Get all projects linked to a contact
+export const GET = withAuth(async (request, { params }) => {
+	try {
+		const contactId = params.id;
+
+		// Get all projects linked to this contact with relationship details
+		const projects = db
+			.prepare(
+				`
+				SELECT 
+					p.project_id,
+					p.project_name,
+					p.project_status,
+					pc.relationship_type,
+					pc.is_primary,
+					pc.added_at
+				FROM projects p
+				INNER JOIN project_contacts pc ON p.project_id = pc.project_id
+				WHERE pc.contact_id = ?
+				ORDER BY pc.is_primary DESC, p.project_name ASC
+			`
+			)
+			.all(contactId);
+
+		return NextResponse.json({
+			projects,
+			count: projects.length,
+		});
+	} catch (error) {
+		console.error("Error fetching contact projects:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch projects" },
+			{ status: 500 }
+		);
+	}
+});

src/app/api/contacts/[id]/route.js

@@ -0,0 +1,111 @@
+import { NextResponse } from "next/server";
+import {
+	getContactById,
+	updateContact,
+	deleteContact,
+	hardDeleteContact,
+} from "@/lib/queries/contacts";
+import { withAuth } from "@/lib/middleware/auth";
+import { syncContactAsync, deleteContactAsync } from "@/lib/radicale-sync";
+
+// GET: Get contact by ID
+async function getContactHandler(req, { params }) {
+	try {
+		const contactId = parseInt(params.id);
+		const contact = getContactById(contactId);
+
+		if (!contact) {
+			return NextResponse.json(
+				{ error: "Contact not found" },
+				{ status: 404 }
+			);
+		}
+
+		return NextResponse.json(contact);
+	} catch (error) {
+		console.error("Error fetching contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// PUT: Update contact
+async function updateContactHandler(req, { params }) {
+	try {
+		const contactId = parseInt(params.id);
+		const data = await req.json();
+
+		// Validate contact type if provided
+		if (data.contact_type) {
+			const validTypes = [
+				"project",
+				"contractor",
+				"office",
+				"supplier",
+				"other",
+			];
+			if (!validTypes.includes(data.contact_type)) {
+				return NextResponse.json(
+					{ error: "Invalid contact type" },
+					{ status: 400 }
+				);
+			}
+		}
+
+		const contact = updateContact(contactId, data);
+
+		if (!contact) {
+			return NextResponse.json(
+				{ error: "Contact not found" },
+				{ status: 404 }
+			);
+		}
+
+		// Sync to Radicale asynchronously (non-blocking)
+		syncContactAsync(contact);
+
+		return NextResponse.json(contact);
+	} catch (error) {
+		console.error("Error updating contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to update contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// DELETE: Delete contact (soft delete or hard delete)
+async function deleteContactHandler(req, { params }) {
+	try {
+		const contactId = parseInt(params.id);
+		const { searchParams } = new URL(req.url);
+		const hard = searchParams.get("hard") === "true";
+
+		if (hard) {
+			// Hard delete - permanently remove
+			hardDeleteContact(contactId);
+			// Delete from Radicale asynchronously
+			deleteContactAsync(contactId);
+		} else {
+			// Soft delete - set is_active to 0
+			deleteContact(contactId);
+			// Delete from Radicale asynchronously
+			deleteContactAsync(contactId);
+		}
+
+		return NextResponse.json({ message: "Contact deleted successfully" });
+	} catch (error) {
+		console.error("Error deleting contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to delete contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// Protected routes - require authentication
+export const GET = withAuth(getContactHandler);
+export const PUT = withAuth(updateContactHandler);
+export const DELETE = withAuth(deleteContactHandler);

src/app/api/contacts/route.js

@@ -0,0 +1,78 @@
+import { NextResponse } from "next/server";
+import {
+	getAllContacts,
+	createContact,
+	getContactStats,
+} from "@/lib/queries/contacts";
+import { withAuth } from "@/lib/middleware/auth";
+import { syncContactAsync } from "@/lib/radicale-sync";
+
+// GET: Get all contacts with optional filters
+async function getContactsHandler(req) {
+	try {
+		const { searchParams } = new URL(req.url);
+		const filters = {
+			is_active: searchParams.get("is_active")
+				? searchParams.get("is_active") === "true"
+				: undefined,
+			contact_type: searchParams.get("contact_type") || undefined,
+			search: searchParams.get("search") || undefined,
+		};
+
+		// Check if stats are requested
+		if (searchParams.get("stats") === "true") {
+			const stats = getContactStats();
+			return NextResponse.json(stats);
+		}
+
+		const contacts = getAllContacts(filters);
+		return NextResponse.json(contacts);
+	} catch (error) {
+		console.error("Error fetching contacts:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch contacts" },
+			{ status: 500 }
+		);
+	}
+}
+
+// POST: Create new contact
+async function createContactHandler(req) {
+	try {
+		const data = await req.json();
+
+		// Validate required fields
+		if (!data.name) {
+			return NextResponse.json(
+				{ error: "Contact name is required" },
+				{ status: 400 }
+			);
+		}
+
+		// Validate contact type
+		const validTypes = ["project", "contractor", "office", "supplier", "other"];
+		if (data.contact_type && !validTypes.includes(data.contact_type)) {
+			return NextResponse.json(
+				{ error: "Invalid contact type" },
+				{ status: 400 }
+			);
+		}
+
+		const contact = createContact(data);
+		
+		// Sync to Radicale asynchronously (non-blocking)
+		syncContactAsync(contact);
+		
+		return NextResponse.json(contact, { status: 201 });
+	} catch (error) {
+		console.error("Error creating contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to create contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// Protected routes - require authentication
+export const GET = withAuth(getContactsHandler);
+export const POST = withAuth(createContactHandler);

src/app/api/contracts/route.js

@@ -10,6 +10,7 @@ async function getContractsHandler() {
 				contract_id,
 				contract_number,
 				contract_name,
+				customer_contract_number,
 				customer,
 				investor,
 				date_signed,
@@ -24,7 +25,7 @@ async function getContractsHandler() {
 
 async function createContractHandler(req) {
 	const data = await req.json();
-	db.prepare(
+	const result = db.prepare(
 		`
     INSERT INTO contracts (
       contract_number,
@@ -45,7 +46,10 @@ async function createContractHandler(req) {
 		data.date_signed,
 		data.finish_date
 	);
-	return NextResponse.json({ success: true });
+	
+	// Return the newly created contract with its ID
+	const contract = db.prepare("SELECT * FROM contracts WHERE contract_id = ?").get(result.lastInsertRowid);
+	return NextResponse.json(contract);
 }
 
 // Protected routes - require authentication

src/app/api/projects/[id]/contacts/route.js

@@ -0,0 +1,111 @@
+import { NextResponse } from "next/server";
+import {
+	getProjectContacts,
+	linkContactToProject,
+	unlinkContactFromProject,
+	setPrimaryContact,
+} from "@/lib/queries/contacts";
+import { withAuth } from "@/lib/middleware/auth";
+
+// GET: Get all contacts for a project
+async function getProjectContactsHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const contacts = getProjectContacts(projectId);
+		return NextResponse.json(contacts);
+	} catch (error) {
+		console.error("Error fetching project contacts:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch project contacts" },
+			{ status: 500 }
+		);
+	}
+}
+
+// POST: Link contact to project
+async function linkContactHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const { contactId, relationshipType, isPrimary } = await req.json();
+		const userId = req.user?.id;
+
+		if (!contactId) {
+			return NextResponse.json(
+				{ error: "Contact ID is required" },
+				{ status: 400 }
+			);
+		}
+
+		linkContactToProject(
+			projectId,
+			contactId,
+			relationshipType || "general",
+			isPrimary || false,
+			userId
+		);
+
+		const contacts = getProjectContacts(projectId);
+		return NextResponse.json(contacts);
+	} catch (error) {
+		console.error("Error linking contact to project:", error);
+		return NextResponse.json(
+			{ error: "Failed to link contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// DELETE: Unlink contact from project
+async function unlinkContactHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const { searchParams } = new URL(req.url);
+		const contactId = parseInt(searchParams.get("contactId"));
+
+		if (!contactId) {
+			return NextResponse.json(
+				{ error: "Contact ID is required" },
+				{ status: 400 }
+			);
+		}
+
+		unlinkContactFromProject(projectId, contactId);
+		return NextResponse.json({ message: "Contact unlinked successfully" });
+	} catch (error) {
+		console.error("Error unlinking contact from project:", error);
+		return NextResponse.json(
+			{ error: "Failed to unlink contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// PATCH: Set primary contact
+async function setPrimaryContactHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const { contactId } = await req.json();
+
+		if (!contactId) {
+			return NextResponse.json(
+				{ error: "Contact ID is required" },
+				{ status: 400 }
+			);
+		}
+
+		setPrimaryContact(projectId, contactId);
+		const contacts = getProjectContacts(projectId);
+		return NextResponse.json(contacts);
+	} catch (error) {
+		console.error("Error setting primary contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to set primary contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+export const GET = withAuth(getProjectContactsHandler);
+export const POST = withAuth(linkContactHandler);
+export const DELETE = withAuth(unlinkContactHandler);
+export const PATCH = withAuth(setPrimaryContactHandler);

src/app/contacts/page.js

@@ -0,0 +1,615 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { useRouter } from "next/navigation";
+import { useSession } from "next-auth/react";
+import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/Card";
+import Button from "@/components/ui/Button";
+import Badge from "@/components/ui/Badge";
+import ContactForm from "@/components/ContactForm";
+
+export default function ContactsPage() {
+	const router = useRouter();
+	const { data: session, status } = useSession();
+	const [contacts, setContacts] = useState([]);
+	const [filteredContacts, setFilteredContacts] = useState([]);
+	const [loading, setLoading] = useState(true);
+	const [showForm, setShowForm] = useState(false);
+	const [editingContact, setEditingContact] = useState(null);
+	const [searchTerm, setSearchTerm] = useState("");
+	const [typeFilter, setTypeFilter] = useState("all");
+	const [stats, setStats] = useState(null);
+	const [selectedContact, setSelectedContact] = useState(null);
+	const [contactProjects, setContactProjects] = useState([]);
+	const [loadingProjects, setLoadingProjects] = useState(false);
+
+	// Redirect if not authenticated
+	useEffect(() => {
+		if (status === "unauthenticated") {
+			router.push("/auth/signin");
+		}
+	}, [status, router]);
+
+	// Fetch contacts
+	useEffect(() => {
+		fetchContacts();
+		fetchStats();
+	}, []);
+
+	// Filter contacts
+	useEffect(() => {
+		let filtered = contacts;
+
+		// Filter by search term
+		if (searchTerm) {
+			const search = searchTerm.toLowerCase();
+			filtered = filtered.filter(
+				(contact) =>
+					contact.name?.toLowerCase().includes(search) ||
+					contact.phone?.toLowerCase().includes(search) ||
+					contact.email?.toLowerCase().includes(search) ||
+					contact.company?.toLowerCase().includes(search)
+			);
+		}
+
+		// Filter by type
+		if (typeFilter !== "all") {
+			filtered = filtered.filter(
+				(contact) => contact.contact_type === typeFilter
+			);
+		}
+
+		setFilteredContacts(filtered);
+	}, [contacts, searchTerm, typeFilter]);
+
+	async function fetchContacts() {
+		try {
+			const response = await fetch("/api/contacts?is_active=true");
+			if (response.ok) {
+				const data = await response.json();
+				console.log('Fetched contacts:', data);
+				setContacts(data);
+			} else {
+				console.error('Failed to fetch contacts, status:', response.status);
+			}
+		} catch (error) {
+			console.error("Error fetching contacts:", error);
+		} finally {
+			setLoading(false);
+		}
+	}
+
+	async function fetchStats() {
+		try {
+			const response = await fetch("/api/contacts?stats=true");
+			if (response.ok) {
+				const data = await response.json();
+				setStats(data);
+			}
+		} catch (error) {
+			console.error("Error fetching stats:", error);
+		}
+	}
+
+	async function handleDelete(contactId) {
+		if (!confirm("Czy na pewno chcesz usunąć ten kontakt?")) return;
+
+		try {
+			const response = await fetch(`/api/contacts/${contactId}`, {
+				method: "DELETE",
+			});
+
+			if (response.ok) {
+				fetchContacts();
+				fetchStats();
+			}
+		} catch (error) {
+			console.error("Error deleting contact:", error);
+			alert("Nie udało się usunąć kontaktu");
+		}
+	}
+
+	function handleEdit(contact) {
+		setEditingContact(contact);
+		setShowForm(true);
+	}
+
+	async function handleViewDetails(contact) {
+		setSelectedContact(contact);
+		setLoadingProjects(true);
+		
+		try {
+			// Fetch projects linked to this contact
+			const response = await fetch(`/api/contacts/${contact.contact_id}/projects`);
+			if (response.ok) {
+				const data = await response.json();
+				setContactProjects(data.projects || []);
+			}
+		} catch (error) {
+			console.error("Error fetching contact projects:", error);
+			setContactProjects([]);
+		} finally {
+			setLoadingProjects(false);
+		}
+	}
+
+	function closeDetails() {
+		setSelectedContact(null);
+		setContactProjects([]);
+	}
+
+	function handleFormSave(contact) {
+		setShowForm(false);
+		setEditingContact(null);
+		fetchContacts();
+		fetchStats();
+	}
+
+	function handleFormCancel() {
+		setShowForm(false);
+		setEditingContact(null);
+	}
+
+	const getContactTypeBadge = (type) => {
+		const types = {
+			project: { label: "Projekt", variant: "primary" },
+			contractor: { label: "Wykonawca", variant: "warning" },
+			office: { label: "Urząd", variant: "info" },
+			supplier: { label: "Dostawca", variant: "success" },
+			other: { label: "Inny", variant: "secondary" },
+		};
+		return types[type] || types.other;
+	};
+
+	if (status === "loading" || loading) {
+		return (
+			<div className="flex justify-center items-center min-h-screen">
+				<div className="text-gray-600">Ładowanie...</div>
+			</div>
+		);
+	}
+
+	if (showForm) {
+		return (
+			<div className="container mx-auto px-4 py-8">
+				<ContactForm
+					initialData={editingContact}
+					onSave={handleFormSave}
+					onCancel={handleFormCancel}
+				/>
+			</div>
+		);
+	}
+
+	return (
+		<div className="container mx-auto px-4 py-8">
+			{/* Header */}
+			<div className="flex flex-col sm:flex-row justify-between items-start sm:items-center gap-4 mb-6">
+				<div>
+					<h1 className="text-3xl font-bold text-gray-900">Kontakty</h1>
+					<p className="text-gray-600 mt-1">
+						Zarządzaj kontaktami do projektów i współpracy
+					</p>
+				</div>
+				<Button onClick={() => setShowForm(true)}>
+					<svg
+						className="w-5 h-5 mr-2"
+						fill="none"
+						stroke="currentColor"
+						viewBox="0 0 24 24"
+					>
+						<path
+							strokeLinecap="round"
+							strokeLinejoin="round"
+							strokeWidth={2}
+							d="M12 4v16m8-8H4"
+						/>
+					</svg>
+					Dodaj kontakt
+				</Button>
+			</div>
+
+			{/* Stats */}
+			{stats && (
+				<div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-6 gap-4 mb-6">
+					<Card>
+						<CardContent className="p-4">
+							<div className="text-2xl font-bold text-gray-900">
+								{stats.total_contacts}
+							</div>
+							<div className="text-sm text-gray-600">Wszystkie</div>
+						</CardContent>
+					</Card>
+					<Card>
+						<CardContent className="p-4">
+							<div className="text-2xl font-bold text-blue-600">
+								{stats.project_contacts}
+							</div>
+							<div className="text-sm text-gray-600">Projekty</div>
+						</CardContent>
+					</Card>
+					<Card>
+						<CardContent className="p-4">
+							<div className="text-2xl font-bold text-orange-600">
+								{stats.contractor_contacts}
+							</div>
+							<div className="text-sm text-gray-600">Wykonawcy</div>
+						</CardContent>
+					</Card>
+					<Card>
+						<CardContent className="p-4">
+							<div className="text-2xl font-bold text-purple-600">
+								{stats.office_contacts}
+							</div>
+							<div className="text-sm text-gray-600">Urzędy</div>
+						</CardContent>
+					</Card>
+					<Card>
+						<CardContent className="p-4">
+							<div className="text-2xl font-bold text-green-600">
+								{stats.supplier_contacts}
+							</div>
+							<div className="text-sm text-gray-600">Dostawcy</div>
+						</CardContent>
+					</Card>
+					<Card>
+						<CardContent className="p-4">
+							<div className="text-2xl font-bold text-gray-600">
+								{stats.other_contacts}
+							</div>
+							<div className="text-sm text-gray-600">Inne</div>
+						</CardContent>
+					</Card>
+				</div>
+			)}
+
+			{/* Filters */}
+			<Card className="mb-6">
+				<CardContent className="p-4">
+					<div className="flex flex-col sm:flex-row gap-4">
+						<div className="flex-1">
+							<input
+								type="text"
+								value={searchTerm}
+								onChange={(e) => setSearchTerm(e.target.value)}
+								placeholder="Szukaj po nazwie, telefonie, email lub firmie..."
+								className="w-full px-4 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+							/>
+						</div>
+						<select
+							value={typeFilter}
+							onChange={(e) => setTypeFilter(e.target.value)}
+							className="px-4 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+						>
+							<option value="all">Wszystkie typy</option>
+							<option value="project">Projekty</option>
+							<option value="contractor">Wykonawcy</option>
+							<option value="office">Urzędy</option>
+							<option value="supplier">Dostawcy</option>
+							<option value="other">Inne</option>
+						</select>
+					</div>
+				</CardContent>
+			</Card>
+
+			{/* Contacts List */}
+			<div className="bg-white border border-gray-200 rounded-lg overflow-hidden">
+				<table className="w-full">
+					<thead className="bg-gray-50 border-b border-gray-200">
+						<tr>
+							<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
+								Kontakt
+							</th>
+							<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
+								Firma / Stanowisko
+							</th>
+							<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
+								Telefon
+							</th>
+							<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
+								Email
+							</th>
+							<th className="px-4 py-3 text-right text-xs font-medium text-gray-500 uppercase tracking-wider">
+								Akcje
+							</th>
+						</tr>
+					</thead>
+					<tbody className="divide-y divide-gray-200">
+						{filteredContacts.length === 0 ? (
+							<tr>
+								<td colSpan="5" className="px-4 py-12 text-center text-gray-500">
+									{searchTerm || typeFilter !== "all"
+										? "Nie znaleziono kontaktów"
+										: "Brak kontaktów. Dodaj pierwszy kontakt."}
+								</td>
+							</tr>
+						) : (
+							filteredContacts.map((contact) => {
+								const typeBadge = getContactTypeBadge(contact.contact_type);
+								return (
+									<tr key={contact.contact_id} className="hover:bg-gray-50 transition-colors">
+										<td className="px-4 py-3">
+											<div className="flex items-center gap-2 cursor-pointer" onClick={() => handleViewDetails(contact)}>
+												<div>
+													<div className="flex items-center gap-2">
+														<h3 className="font-semibold text-gray-900 text-sm hover:text-blue-600 transition-colors">
+															{contact.name}
+														</h3>
+														<Badge variant={typeBadge.variant} size="sm" className="text-xs">
+															{typeBadge.label}
+														</Badge>
+													</div>
+													{contact.project_count > 0 && (
+														<span className="inline-flex items-center gap-1 text-xs text-gray-500 mt-1">
+															<svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+																<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
+															</svg>
+															{contact.project_count} {contact.project_count === 1 ? "projekt" : "projektów"}
+														</span>
+													)}
+												</div>
+											</div>
+										</td>
+										<td className="px-4 py-3">
+											<div className="text-sm text-gray-600">
+												{contact.company && (
+													<div className="flex items-center gap-1">
+														<span>{contact.company}</span>
+														{contact.position && <span className="text-gray-500 ml-1">• {contact.position}</span>}
+													</div>
+												)}
+												{!contact.company && contact.position && (
+													<div>{contact.position}</div>
+												)}
+											</div>
+										</td>
+										<td className="px-4 py-3">
+											{contact.phone && (
+												<div className="space-y-1">
+													{(() => {
+														// Handle multiple phones (could be comma-separated or JSON)
+														let phones = [];
+														try {
+															// Try to parse as JSON array first
+															const parsed = JSON.parse(contact.phone);
+															phones = Array.isArray(parsed) ? parsed : [contact.phone];
+														} catch {
+															// Fall back to comma-separated string
+															phones = contact.phone.split(',').map(p => p.trim()).filter(p => p);
+														}
+
+														const primaryPhone = phones[0];
+														const additionalPhones = phones.slice(1);
+
+														return (
+															<>
+																<a
+																	href={`tel:${primaryPhone}`}
+																	className="flex items-center gap-1 text-sm text-blue-600 hover:underline"
+																>
+																	<svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+																		<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 5a2 2 0 012-2h3.28a1 1 0 01.948.684l1.498 4.493a1 1 0 01-.502 1.21l-2.257 1.13a11.042 11.042 0 005.516 5.516l1.13-2.257a1 1 0 011.21-.502l4.493 1.498a1 1 0 01.684.949V19a2 2 0 01-2 2h-1C9.716 21 3 14.284 3 6V5z" />
+																	</svg>
+																	{primaryPhone}
+																</a>
+																{additionalPhones.length > 0 && (
+																	<div className="text-xs text-gray-500 pl-5">
+																		{additionalPhones.length === 1 ? (
+																			<a
+																				href={`tel:${additionalPhones[0]}`}
+																				className="text-blue-600 hover:underline"
+																			>
+																				{additionalPhones[0]}
+																			</a>
+																		) : (
+																			<span>+{additionalPhones.length} więcej</span>
+																		)}
+																	</div>
+																)}
+															</>
+														);
+													})()}
+												</div>
+											)}
+										</td>
+										<td className="px-4 py-3">
+											{contact.email && (
+												<a
+													href={`mailto:${contact.email}`}
+													className="flex items-center gap-1 text-sm text-blue-600 hover:underline"
+												>
+													<svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+														<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z" />
+													</svg>
+													<span className="truncate max-w-[200px]">{contact.email}</span>
+												</a>
+											)}
+										</td>
+										<td className="px-4 py-3 text-right">
+											<div className="flex justify-end gap-1">
+												<Button
+													size="sm"
+													variant="secondary"
+													onClick={(e) => {
+														e.stopPropagation();
+														handleEdit(contact);
+													}}
+													className="px-2 py-1"
+												>
+													<svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+														<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
+													</svg>
+												</Button>
+												<Button
+													size="sm"
+													variant="danger"
+													onClick={(e) => {
+														e.stopPropagation();
+														handleDelete(contact.contact_id);
+													}}
+													className="px-2 py-1"
+												>
+													<svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+														<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
+													</svg>
+												</Button>
+											</div>
+										</td>
+									</tr>
+								);
+							})
+						)}
+					</tbody>
+				</table>
+			</div>
+
+			{/* Contact Details Modal */}
+			{selectedContact && (
+				<div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50" onClick={closeDetails}>
+					<Card className="max-w-2xl w-full max-h-[90vh] overflow-y-auto" onClick={(e) => e.stopPropagation()}>
+						<CardHeader className="border-b">
+							<div className="flex justify-between items-start">
+								<div>
+									<CardTitle className="text-2xl">{selectedContact.name}</CardTitle>
+									<div className="mt-2">
+										<Badge variant={getContactTypeBadge(selectedContact.contact_type).variant}>
+											{getContactTypeBadge(selectedContact.contact_type).label}
+										</Badge>
+									</div>
+								</div>
+								<Button variant="ghost" size="sm" onClick={closeDetails}>
+									<svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+										<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+									</svg>
+								</Button>
+							</div>
+						</CardHeader>
+						<CardContent className="p-6 space-y-6">
+							{/* Contact Information */}
+							<div>
+								<h3 className="font-semibold text-gray-900 mb-3">Informacje kontaktowe</h3>
+								<div className="space-y-2">
+									{selectedContact.phone && (() => {
+										let phones = [];
+										try {
+											const parsed = JSON.parse(selectedContact.phone);
+											phones = Array.isArray(parsed) ? parsed : [selectedContact.phone];
+										} catch {
+											phones = selectedContact.phone.split(',').map(p => p.trim()).filter(p => p);
+										}
+
+										return phones.map((phone, index) => (
+											<div key={index} className="flex items-center gap-3">
+												<svg className="w-5 h-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+													<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 5a2 2 0 012-2h3.28a1 1 0 01.948.684l1.498 4.493a1 1 0 01-.502 1.21l-2.257 1.13a11.042 11.042 0 005.516 5.516l1.13-2.257a1 1 0 011.21-.502l4.493 1.498a1 1 0 01.684.949V19a2 2 0 01-2 2h-1C9.716 21 3 14.284 3 6V5z" />
+												</svg>
+												<a href={`tel:${phone}`} className="text-blue-600 hover:underline">
+													{phone}
+												</a>
+												{index === 0 && phones.length > 1 && (
+													<span className="text-xs text-gray-500">(główny)</span>
+												)}
+											</div>
+										));
+									})()}
+									{selectedContact.email && (
+										<div className="flex items-center gap-3">
+											<svg className="w-5 h-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+												<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z" />
+											</svg>
+											<a href={`mailto:${selectedContact.email}`} className="text-blue-600 hover:underline">
+												{selectedContact.email}
+											</a>
+										</div>
+									)}
+									{selectedContact.company && (
+										<div className="flex items-center gap-3">
+											<span className="text-xl">🏢</span>
+											<span className="text-gray-700">
+												{selectedContact.company}
+												{selectedContact.position && ` • ${selectedContact.position}`}
+											</span>
+										</div>
+									)}
+									{!selectedContact.company && selectedContact.position && (
+										<div className="flex items-center gap-3">
+											<span className="text-xl">💼</span>
+											<span className="text-gray-700">{selectedContact.position}</span>
+										</div>
+									)}
+								</div>
+							</div>
+
+							{/* Notes */}
+							{selectedContact.notes && (
+								<div>
+									<h3 className="font-semibold text-gray-900 mb-2">Notatki</h3>
+									<p className="text-gray-600 text-sm whitespace-pre-wrap bg-gray-50 p-3 rounded">
+										{selectedContact.notes}
+									</p>
+								</div>
+							)}
+
+							{/* Linked Projects */}
+							<div>
+								<h3 className="font-semibold text-gray-900 mb-3">
+									Powiązane projekty ({contactProjects.length})
+								</h3>
+								{loadingProjects ? (
+									<div className="text-center py-4 text-gray-500">Ładowanie projektów...</div>
+								) : contactProjects.length === 0 ? (
+									<p className="text-gray-500 text-sm">Brak powiązanych projektów</p>
+								) : (
+									<div className="space-y-2">
+										{contactProjects.map((project) => (
+											<div
+												key={project.project_id}
+												className="flex items-center justify-between p-3 bg-gray-50 hover:bg-gray-100 rounded cursor-pointer transition-colors"
+												onClick={() => router.push(`/projects/${project.project_id}`)}
+											>
+												<div className="flex-1">
+													<div className="flex items-center gap-2">
+														<span className="font-medium text-gray-900">{project.project_name}</span>
+														{project.is_primary && (
+															<Badge variant="primary" size="sm">Główny kontakt</Badge>
+														)}
+													</div>
+													{project.relationship_type && (
+														<span className="text-xs text-gray-500">{project.relationship_type}</span>
+													)}
+												</div>
+												<svg className="w-5 h-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+													<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
+												</svg>
+											</div>
+										))}
+									</div>
+								)}
+							</div>
+
+							{/* Action Buttons */}
+							<div className="flex gap-3 pt-4 border-t">
+								<Button
+									variant="secondary"
+									onClick={() => {
+										closeDetails();
+										handleEdit(selectedContact);
+									}}
+									className="flex-1"
+								>
+									<svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+										<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
+									</svg>
+									Edytuj kontakt
+								</Button>
+								<Button variant="ghost" onClick={closeDetails}>
+									Zamknij
+								</Button>
+							</div>
+						</CardContent>
+					</Card>
+				</div>
+			)}
+		</div>
+	);
+}

src/app/contracts/page.js

@@ -19,8 +19,8 @@ export default function ContractsMainPage() {
 	const [loading, setLoading] = useState(true);
 	const [searchTerm, setSearchTerm] = useState("");
 	const [filteredContracts, setFilteredContracts] = useState([]);
-	const [sortBy, setSortBy] = useState("contract_number");
-	const [sortOrder, setSortOrder] = useState("asc");
+	const [sortBy, setSortBy] = useState("date_signed");
+	const [sortOrder, setSortOrder] = useState("desc");
 	const [statusFilter, setStatusFilter] = useState("all");
 
 	useEffect(() => {
@@ -53,6 +53,9 @@ export default function ContractsMainPage() {
 					contract.contract_name
 						?.toLowerCase()
 						.includes(searchTerm.toLowerCase()) ||
+					contract.customer_contract_number
+						?.toLowerCase()
+						.includes(searchTerm.toLowerCase()) ||
 					contract.customer?.toLowerCase().includes(searchTerm.toLowerCase()) ||
 					contract.investor?.toLowerCase().includes(searchTerm.toLowerCase())
 			);
@@ -64,9 +67,9 @@ export default function ContractsMainPage() {
 			filtered = filtered.filter((contract) => {
 				if (statusFilter === "active" && contract.finish_date) {
 					return new Date(contract.finish_date) >= currentDate;
-				} else if (statusFilter === "completed" && contract.finish_date) {
+				} else if (statusFilter === "expired" && contract.finish_date) {
 					return new Date(contract.finish_date) < currentDate;
-				} else if (statusFilter === "no_end_date") {
+				} else if (statusFilter === "ongoing") {
 					return !contract.finish_date;
 				}
 				return true;
@@ -117,27 +120,27 @@ export default function ContractsMainPage() {
 		const active = contracts.filter(
 			(c) => !c.finish_date || new Date(c.finish_date) >= currentDate
 		).length;
-		const completed = contracts.filter(
+		const expired = contracts.filter(
 			(c) => c.finish_date && new Date(c.finish_date) < currentDate
 		).length;
 		const withoutEndDate = contracts.filter((c) => !c.finish_date).length;
 
-		return { total, active, completed, withoutEndDate };
+		return { total, active, expired, withoutEndDate };
 	};
 
 	const getContractStatus = (contract) => {
 		if (!contract.finish_date) return "ongoing";
 		const currentDate = new Date();
 		const finishDate = new Date(contract.finish_date);
-		return finishDate >= currentDate ? "active" : "completed";
+		return finishDate >= currentDate ? "active" : "expired";
 	};
 
 	const getStatusBadge = (status) => {
 		switch (status) {
 			case "active":
 				return <Badge variant="success">{t('contracts.active')}</Badge>;
-			case "completed":
-				return <Badge variant="secondary">{t('common.completed')}</Badge>;
+			case "expired":
+				return <Badge variant="danger">{t('contracts.expired')}</Badge>;
 			case "ongoing":
 				return <Badge variant="primary">{t('contracts.withoutEndDate')}</Badge>;
 			default:
@@ -209,8 +212,8 @@ export default function ContractsMainPage() {
 			options: [
 				{ value: "all", label: "Wszystkie" },
 				{ value: "active", label: "Aktywne" },
-				{ value: "completed", label: "Zakończone" },
-				{ value: "no_end_date", label: "Bez daty końca" },
+				{ value: "expired", label: "Przeterminowane" },
+				{ value: "ongoing", label: "W trakcie" },
 			],
 		},
 		{
@@ -221,7 +224,7 @@ export default function ContractsMainPage() {
 				{ value: "contract_number", label: "Numer umowy" },
 				{ value: "contract_name", label: "Nazwa umowy" },
 				{ value: "customer", label: "Klient" },
-				{ value: "start_date", label: "Data rozpoczęcia" },
+				{ value: "date_signed", label: "Data podpisania" },
 				{ value: "finish_date", label: "Data zakończenia" },
 			],
 		},
@@ -338,9 +341,9 @@ export default function ContractsMainPage() {
 								</svg>
 							</div>
 							<div className="ml-4">
-								<p className="text-sm font-medium text-gray-600">Zakończone</p>
+								<p className="text-sm font-medium text-gray-600">Przeterminowane</p>
 								<p className="text-2xl font-bold text-gray-900">
-									{stats.completed}
+									{stats.expired}
 								</p>
 							</div>
 						</div>

src/app/projects/[id]/page.js

@@ -588,10 +588,19 @@ export default function ProjectViewPage() {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Nazwa umowy
+										Numer umowy klienta
 									</span>
 									<p className="text-gray-900 font-medium">
-										{project.contract_name || "N/A"}
+										{project.customer_contract_number ? (
+											<Link 
+												href={`/contracts/${project.contract_id}`}
+												className="text-inherit hover:text-inherit no-underline"
+											>
+												{project.customer_contract_number}
+											</Link>
+										) : (
+											"N/A"
+										)}
 									</p>
 								</div>
 								<div>

src/components/ContactForm.js

@@ -0,0 +1,296 @@
+"use client";
+
+import React, { useState } from "react";
+import { Card, CardHeader, CardContent } from "@/components/ui/Card";
+import Button from "@/components/ui/Button";
+import { Input } from "@/components/ui/Input";
+
+export default function ContactForm({ initialData = null, onSave, onCancel }) {
+	const [form, setForm] = useState({
+		name: "",
+		phones: [""],
+		email: "",
+		company: "",
+		position: "",
+		contact_type: "other",
+		notes: "",
+		is_active: true,
+		...initialData,
+	});
+	const [loading, setLoading] = useState(false);
+	const [error, setError] = useState(null);
+
+	// Handle initial data with phones
+	React.useEffect(() => {
+		if (initialData) {
+			let phones = [""];
+			if (initialData.phone) {
+				try {
+					// Try to parse as JSON array first
+					const parsed = JSON.parse(initialData.phone);
+					phones = Array.isArray(parsed) ? parsed : [initialData.phone];
+				} catch {
+					// Fall back to comma-separated string
+					phones = initialData.phone.split(',').map(p => p.trim()).filter(p => p);
+				}
+			}
+			setForm(prev => ({
+				...prev,
+				...initialData,
+				phones: phones.length > 0 ? phones : [""]
+			}));
+		}
+	}, [initialData]);
+
+	const isEdit = !!initialData;
+
+	function handleChange(e) {
+		const { name, value, type, checked } = e.target;
+		setForm((prev) => ({
+			...prev,
+			[name]: type === "checkbox" ? checked : value,
+		}));
+	}
+
+	function handlePhoneChange(index, value) {
+		setForm(prev => ({
+			...prev,
+			phones: prev.phones.map((phone, i) => i === index ? value : phone)
+		}));
+	}
+
+	function addPhone() {
+		setForm(prev => ({
+			...prev,
+			phones: [...prev.phones, ""]
+		}));
+	}
+
+	function removePhone(index) {
+		if (form.phones.length > 1) {
+			setForm(prev => ({
+				...prev,
+				phones: prev.phones.filter((_, i) => i !== index)
+			}));
+		}
+	}
+
+	async function handleSubmit(e) {
+		e.preventDefault();
+		setLoading(true);
+		setError(null);
+
+		try {
+			// Filter out empty phones and prepare data
+			const filteredPhones = form.phones.filter(phone => phone.trim());
+			const submitData = {
+				...form,
+				phone: filteredPhones.length > 1 ? JSON.stringify(filteredPhones) : (filteredPhones[0] || null),
+				phones: undefined // Remove phones array from submission
+			};
+
+			const url = isEdit
+				? `/api/contacts/${initialData.contact_id}`
+				: "/api/contacts";
+			const method = isEdit ? "PUT" : "POST";
+
+			const response = await fetch(url, {
+				method,
+				headers: { "Content-Type": "application/json" },
+				body: JSON.stringify(submitData),
+			});
+
+			if (!response.ok) {
+				const data = await response.json();
+				throw new Error(data.error || "Failed to save contact");
+			}
+
+			const contact = await response.json();
+			onSave?.(contact);
+		} catch (err) {
+			setError(err.message);
+		} finally {
+			setLoading(false);
+		}
+	}
+
+	return (
+		<Card>
+			<CardHeader>
+				<h2 className="text-xl font-semibold text-gray-900">
+					{isEdit ? "Edytuj kontakt" : "Nowy kontakt"}
+				</h2>
+			</CardHeader>
+			<CardContent>
+				<form onSubmit={handleSubmit} className="space-y-6">
+					{error && (
+						<div className="p-3 bg-red-50 border border-red-200 rounded-md text-red-600 text-sm">
+							{error}
+						</div>
+					)}
+
+					{/* Basic Information */}
+					<div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+						<div className="md:col-span-2">
+							<label className="block text-sm font-medium text-gray-700 mb-2">
+								Imię i nazwisko <span className="text-red-500">*</span>
+							</label>
+							<Input
+								type="text"
+								name="name"
+								value={form.name}
+								onChange={handleChange}
+								placeholder="Wprowadź imię i nazwisko"
+								required
+							/>
+						</div>
+
+						<div>
+							<label className="block text-sm font-medium text-gray-700 mb-2">
+								Telefon
+							</label>
+							<div className="space-y-2">
+								{form.phones.map((phone, index) => (
+									<div key={index} className="flex gap-2">
+										<Input
+											type="tel"
+											value={phone}
+											onChange={(e) => handlePhoneChange(index, e.target.value)}
+											placeholder={index === 0 ? "+48 123 456 789" : "Dodatkowy numer"}
+											className="flex-1"
+										/>
+										{form.phones.length > 1 && (
+											<Button
+												type="button"
+												variant="danger"
+												size="sm"
+												onClick={() => removePhone(index)}
+												className="px-2"
+											>
+												<svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+													<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
+												</svg>
+											</Button>
+										)}
+									</div>
+								))}
+								<Button
+									type="button"
+									variant="secondary"
+									size="sm"
+									onClick={addPhone}
+									className="w-full"
+								>
+									<svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+										<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8H4" />
+									</svg>
+									Dodaj kolejny numer
+								</Button>
+							</div>
+						</div>
+
+						<div>
+							<label className="block text-sm font-medium text-gray-700 mb-2">
+								Email
+							</label>
+							<Input
+								type="email"
+								name="email"
+								value={form.email}
+								onChange={handleChange}
+								placeholder="email@example.com"
+							/>
+						</div>
+
+						<div>
+							<label className="block text-sm font-medium text-gray-700 mb-2">
+								Firma
+							</label>
+							<Input
+								type="text"
+								name="company"
+								value={form.company}
+								onChange={handleChange}
+								placeholder="Nazwa firmy"
+							/>
+						</div>
+
+						<div>
+							<label className="block text-sm font-medium text-gray-700 mb-2">
+								Stanowisko
+							</label>
+							<Input
+								type="text"
+								name="position"
+								value={form.position}
+								onChange={handleChange}
+								placeholder="Kierownik projektu"
+							/>
+						</div>
+
+						<div className="md:col-span-2">
+							<label className="block text-sm font-medium text-gray-700 mb-2">
+								Typ kontaktu
+							</label>
+							<select
+								name="contact_type"
+								value={form.contact_type}
+								onChange={handleChange}
+								className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500"
+							>
+								<option value="project">Kontakt projektowy</option>
+								<option value="contractor">Wykonawca</option>
+								<option value="office">Urząd</option>
+								<option value="supplier">Dostawca</option>
+								<option value="other">Inny</option>
+							</select>
+						</div>
+
+						<div className="md:col-span-2">
+							<label className="block text-sm font-medium text-gray-700 mb-2">
+								Notatki
+							</label>
+							<textarea
+								name="notes"
+								value={form.notes}
+								onChange={handleChange}
+								rows={3}
+								className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500"
+								placeholder="Dodatkowe informacje..."
+							/>
+						</div>
+
+						{isEdit && (
+							<div className="md:col-span-2">
+								<label className="flex items-center gap-2">
+									<input
+										type="checkbox"
+										name="is_active"
+										checked={form.is_active}
+										onChange={handleChange}
+										className="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500"
+									/>
+									<span className="text-sm font-medium text-gray-700">
+										Kontakt aktywny
+									</span>
+								</label>
+							</div>
+						)}
+					</div>
+
+					{/* Actions */}
+					<div className="flex justify-end gap-3 pt-4 border-t">
+						{onCancel && (
+							<Button type="button" variant="secondary" onClick={onCancel}>
+								Anuluj
+							</Button>
+						)}
+						<Button type="submit" disabled={loading}>
+							{loading ? "Zapisywanie..." : isEdit ? "Zapisz zmiany" : "Dodaj kontakt"}
+						</Button>
+					</div>
+				</form>
+			</CardContent>
+		</Card>
+	);
+}

src/components/ProjectContactSelector.js

@@ -0,0 +1,300 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import Button from "@/components/ui/Button";
+import Badge from "@/components/ui/Badge";
+
+export default function ProjectContactSelector({ projectId, onChange }) {
+	const [contacts, setContacts] = useState([]);
+	const [projectContacts, setProjectContacts] = useState([]);
+	const [showSelector, setShowSelector] = useState(false);
+	const [loading, setLoading] = useState(false);
+	const [searchTerm, setSearchTerm] = useState("");
+
+	useEffect(() => {
+		fetchAllContacts();
+		if (projectId) {
+			fetchProjectContacts();
+		}
+	}, [projectId]);
+
+	async function fetchAllContacts() {
+		try {
+			const response = await fetch("/api/contacts?is_active=true");
+			if (response.ok) {
+				const data = await response.json();
+				setContacts(data);
+			}
+		} catch (error) {
+			console.error("Error fetching contacts:", error);
+		}
+	}
+
+	async function fetchProjectContacts() {
+		try {
+			const response = await fetch(`/api/projects/${projectId}/contacts`);
+			if (response.ok) {
+				const data = await response.json();
+				setProjectContacts(data);
+				onChange?.(data);
+			}
+		} catch (error) {
+			console.error("Error fetching project contacts:", error);
+		}
+	}
+
+	async function handleAddContact(contactId) {
+		setLoading(true);
+		try {
+			const response = await fetch(`/api/projects/${projectId}/contacts`, {
+				method: "POST",
+				headers: { "Content-Type": "application/json" },
+				body: JSON.stringify({ contactId }),
+			});
+
+			if (response.ok) {
+				await fetchProjectContacts();
+				setShowSelector(false);
+				setSearchTerm("");
+			}
+		} catch (error) {
+			console.error("Error adding contact:", error);
+			alert("Nie udało się dodać kontaktu");
+		} finally {
+			setLoading(false);
+		}
+	}
+
+	async function handleRemoveContact(contactId) {
+		if (!confirm("Czy na pewno chcesz usunąć ten kontakt z projektu?"))
+			return;
+
+		try {
+			const response = await fetch(
+				`/api/projects/${projectId}/contacts?contactId=${contactId}`,
+				{
+					method: "DELETE",
+				}
+			);
+
+			if (response.ok) {
+				await fetchProjectContacts();
+			}
+		} catch (error) {
+			console.error("Error removing contact:", error);
+			alert("Nie udało się usunąć kontaktu");
+		}
+	}
+
+	async function handleSetPrimary(contactId) {
+		try {
+			const response = await fetch(`/api/projects/${projectId}/contacts`, {
+				method: "PATCH",
+				headers: { "Content-Type": "application/json" },
+				body: JSON.stringify({ contactId }),
+			});
+
+			if (response.ok) {
+				await fetchProjectContacts();
+			}
+		} catch (error) {
+			console.error("Error setting primary contact:", error);
+			alert("Nie udało się ustawić głównego kontaktu");
+		}
+	}
+
+	const getContactTypeBadge = (type) => {
+		const types = {
+			project: { label: "Projekt", variant: "primary" },
+			contractor: { label: "Wykonawca", variant: "warning" },
+			office: { label: "Urząd", variant: "info" },
+			supplier: { label: "Dostawca", variant: "success" },
+			other: { label: "Inny", variant: "secondary" },
+		};
+		return types[type] || types.other;
+	};
+
+	const filteredAvailable = searchTerm
+		? contacts.filter(
+				(c) =>
+					c.name?.toLowerCase().includes(searchTerm.toLowerCase()) ||
+					c.phone?.toLowerCase().includes(searchTerm.toLowerCase()) ||
+					c.email?.toLowerCase().includes(searchTerm.toLowerCase()) ||
+					c.company?.toLowerCase().includes(searchTerm.toLowerCase())
+		  )
+		: contacts;
+
+	return (
+		<div className="space-y-4">
+			<div className="flex items-center justify-between">
+				<label className="block text-sm font-medium text-gray-700">
+					Kontakty do projektu
+				</label>
+				{projectId && (
+					<Button
+						type="button"
+						size="sm"
+						variant="secondary"
+						onClick={() => setShowSelector(!showSelector)}
+					>
+						{showSelector ? "Anuluj" : "+ Dodaj kontakt"}
+					</Button>
+				)}
+			</div>
+
+			{/* Current project contacts */}
+			{projectContacts.length > 0 ? (
+				<div className="space-y-2">
+					{projectContacts.map((contact) => {
+						const typeBadge = getContactTypeBadge(contact.contact_type);
+						return (
+							<div
+								key={contact.contact_id}
+								className="flex items-center justify-between p-3 bg-gray-50 rounded-md border border-gray-200"
+							>
+								<div className="flex-1">
+									<div className="flex items-center gap-2">
+										<span className="font-medium text-gray-900">
+											{contact.name}
+										</span>
+										{contact.is_primary === 1 && (
+											<Badge variant="success" size="xs">
+												Główny
+											</Badge>
+										)}
+										<Badge variant={typeBadge.variant} size="xs">
+											{typeBadge.label}
+										</Badge>
+									</div>
+									<div className="text-sm text-gray-600 mt-1 space-y-0.5">
+										{contact.phone && <div>📞 {contact.phone}</div>}
+										{contact.email && <div>📧 {contact.email}</div>}
+										{contact.company && (
+											<div className="text-xs">🏢 {contact.company}</div>
+										)}
+									</div>
+								</div>
+								<div className="flex items-center gap-2">
+									{contact.is_primary !== 1 && (
+										<button
+											type="button"
+											onClick={() => handleSetPrimary(contact.contact_id)}
+											className="text-xs text-blue-600 hover:text-blue-700 px-2 py-1 rounded hover:bg-blue-50"
+											title="Ustaw jako główny"
+										>
+											Ustaw główny
+										</button>
+									)}
+									<button
+										type="button"
+										onClick={() => handleRemoveContact(contact.contact_id)}
+										className="text-red-600 hover:text-red-700 p-1 rounded hover:bg-red-50"
+										title="Usuń kontakt"
+									>
+										<svg
+											className="w-4 h-4"
+											fill="none"
+											stroke="currentColor"
+											viewBox="0 0 24 24"
+										>
+											<path
+												strokeLinecap="round"
+												strokeLinejoin="round"
+												strokeWidth={2}
+												d="M6 18L18 6M6 6l12 12"
+											/>
+										</svg>
+									</button>
+								</div>
+							</div>
+						);
+					})}
+				</div>
+			) : (
+				<div className="text-sm text-gray-500 italic p-3 bg-gray-50 rounded-md">
+					{projectId
+						? "Brak powiązanych kontaktów. Dodaj kontakt do projektu."
+						: "Zapisz projekt, aby móc dodać kontakty."}
+				</div>
+			)}
+
+			{/* Contact selector */}
+			{showSelector && projectId && (
+				<div className="border border-gray-300 rounded-md p-4 bg-white">
+					<div className="mb-3">
+						<input
+							type="text"
+							value={searchTerm}
+							onChange={(e) => setSearchTerm(e.target.value)}
+							placeholder="Szukaj kontaktu..."
+							className="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+						/>
+					</div>
+
+					<div className="max-h-60 overflow-y-auto space-y-2">
+						{filteredAvailable.length === 0 ? (
+							<p className="text-sm text-gray-500 text-center py-4">
+								{searchTerm
+									? "Nie znaleziono kontaktów"
+									: "Brak dostępnych kontaktów"}
+							</p>
+						) : (
+							filteredAvailable.map((contact) => {
+								const typeBadge = getContactTypeBadge(contact.contact_type);
+								const isAlreadyAdded = projectContacts.some(
+									(pc) => pc.contact_id === contact.contact_id
+								);
+								return (
+									<div
+										key={contact.contact_id}
+										className={`flex items-center justify-between p-2 rounded border ${
+											isAlreadyAdded
+												? "bg-gray-100 border-gray-300"
+												: "hover:bg-gray-50 border-gray-200"
+										}`}
+									>
+										<div className="flex-1">
+											<div className="flex items-center gap-2">
+												<span className="font-medium text-sm text-gray-900">
+													{contact.name}
+												</span>
+												<Badge variant={typeBadge.variant} size="xs">
+													{typeBadge.label}
+												</Badge>
+												{isAlreadyAdded && (
+													<Badge variant="secondary" size="xs">
+														Już dodany
+													</Badge>
+												)}
+											</div>
+											<div className="text-xs text-gray-600 mt-1">
+												{contact.phone && <span>{contact.phone}</span>}
+												{contact.phone && contact.email && (
+													<span className="mx-1">•</span>
+												)}
+												{contact.email && <span>{contact.email}</span>}
+											</div>
+											{contact.company && (
+												<div className="text-xs text-gray-500">
+													{contact.company}
+												</div>
+											)}
+										</div>
+										<Button
+											type="button"
+											size="sm"
+											onClick={() => handleAddContact(contact.contact_id)}
+											disabled={loading || isAlreadyAdded}
+										>
+											{isAlreadyAdded ? "Dodany" : "Dodaj"}
+										</Button>
+									</div>
+								);
+							})
+						)}
+					</div>
+				</div>
+			)}
+		</div>
+	);
+}

src/components/ProjectForm.js

@@ -8,6 +8,7 @@ import Button from "@/components/ui/Button";
 import { Input } from "@/components/ui/Input";
 import { formatDateForInput } from "@/lib/utils";
 import { useTranslation } from "@/lib/i18n";
+import ProjectContactSelector from "@/components/ProjectContactSelector";
 
 const ProjectForm = forwardRef(function ProjectForm({ initialData = null }, ref) {
 	const { t } = useTranslation();
@@ -365,15 +366,8 @@ const ProjectForm = forwardRef(function ProjectForm({ initialData = null }, ref)
 							)}
 
 							<div className="md:col-span-2">
-								<label className="block text-sm font-medium text-gray-700 mb-2">
-									{t('projects.contact')}
-								</label>
-								<Input
-									type="text"
-									name="contact"
-									value={form.contact || ""}
-									onChange={handleChange}
-									placeholder={t('projects.placeholders.contact')}
+								<ProjectContactSelector 
+									projectId={initialData?.project_id}
 								/>
 							</div>
 

src/components/ui/Card.js

@@ -27,6 +27,14 @@ const CardHeader = ({ children, className = "" }) => {
 	);
 };
 
+const CardTitle = ({ children, className = "" }) => {
+	return (
+		<h3 className={`text-lg font-semibold text-gray-900 dark:text-gray-100 ${className}`}>
+			{children}
+		</h3>
+	);
+};
+
 const CardContent = ({ children, className = "" }) => {
 	return <div className={`px-6 py-4 ${className}`}>{children}</div>;
 };
@@ -39,4 +47,4 @@ const CardFooter = ({ children, className = "" }) => {
 	);
 };
 
-export { Card, CardHeader, CardContent, CardFooter };
+export { Card, CardHeader, CardTitle, CardContent, CardFooter };

src/components/ui/Navigation.js

@@ -143,6 +143,7 @@ const Navigation = () => {
 
 	const navItems = [
 		{ href: "/projects", label: t('navigation.projects') },
+		{ href: "/contacts", label: t('navigation.contacts') || 'Kontakty' },
 		{ href: "/calendar", label: t('navigation.calendar') || 'Kalendarz' },
 		{ href: "/project-tasks", label: t('navigation.tasks') || 'Tasks' },
 		{ href: "/contracts", label: t('navigation.contracts') },

src/lib/i18n.js

@@ -12,6 +12,7 @@ const translations = {
     navigation: {
       dashboard: "Panel główny",
       projects: "Projekty", 
+      contacts: "Kontakty",
       calendar: "Kalendarz",
       taskTemplates: "Szablony zadań",
       projectTasks: "Zadania projektów",
@@ -245,6 +246,38 @@ const translations = {
       }
     },
 
+    // Contacts
+    contacts: {
+      title: "Kontakty",
+      subtitle: "Zarządzaj kontaktami",
+      contact: "Kontakt",
+      newContact: "Nowy kontakt",
+      editContact: "Edytuj kontakt",
+      deleteContact: "Usuń kontakt",
+      name: "Imię i nazwisko",
+      phone: "Telefon",
+      email: "Email",
+      company: "Firma",
+      position: "Stanowisko",
+      contactType: "Typ kontaktu",
+      notes: "Notatki",
+      active: "Aktywny",
+      inactive: "Nieaktywny",
+      searchPlaceholder: "Szukaj kontaktów...",
+      noContacts: "Brak kontaktów",
+      addFirstContact: "Dodaj pierwszy kontakt",
+      selectContact: "Wybierz kontakt",
+      addContact: "Dodaj kontakt",
+      linkedProjects: "Powiązane projekty",
+      types: {
+        project: "Kontakt projektowy",
+        contractor: "Wykonawca",
+        office: "Urząd",
+        supplier: "Dostawca",
+        other: "Inny"
+      }
+    },
+
     // Contracts
     contracts: {
       title: "Umowy",

src/lib/init-db.js

@@ -500,5 +500,59 @@ export default function initializeDatabase() {
 		CREATE INDEX IF NOT EXISTS idx_notifications_user_read ON notifications(user_id, is_read);
 		CREATE INDEX IF NOT EXISTS idx_notifications_created ON notifications(created_at);
 		CREATE INDEX IF NOT EXISTS idx_notifications_type ON notifications(type);
+
+		-- Settings table for application configuration
+		CREATE TABLE IF NOT EXISTS settings (
+			key TEXT PRIMARY KEY,
+			value TEXT NOT NULL,
+			description TEXT,
+			updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
+			updated_by TEXT,
+			FOREIGN KEY (updated_by) REFERENCES users(id)
+		);
+
+		-- Insert default settings
+		INSERT OR IGNORE INTO settings (key, value, description) VALUES 
+		('backup_notification_user_id', '', 'User ID to receive backup completion notifications');
+	`);
+
+	// Contacts table for managing contact information
+	db.exec(`
+		CREATE TABLE IF NOT EXISTS contacts (
+			contact_id INTEGER PRIMARY KEY AUTOINCREMENT,
+			name TEXT NOT NULL,
+			phone TEXT,
+			email TEXT,
+			company TEXT,
+			position TEXT,
+			contact_type TEXT CHECK(contact_type IN ('project', 'contractor', 'office', 'supplier', 'other')) DEFAULT 'other',
+			notes TEXT,
+			is_active INTEGER DEFAULT 1,
+			created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+			updated_at TEXT DEFAULT CURRENT_TIMESTAMP
+		);
+
+		-- Project contacts junction table (many-to-many relationship)
+		CREATE TABLE IF NOT EXISTS project_contacts (
+			project_id INTEGER NOT NULL,
+			contact_id INTEGER NOT NULL,
+			relationship_type TEXT DEFAULT 'general',
+			is_primary INTEGER DEFAULT 0,
+			added_at TEXT DEFAULT CURRENT_TIMESTAMP,
+			added_by TEXT,
+			PRIMARY KEY (project_id, contact_id),
+			FOREIGN KEY (project_id) REFERENCES projects(project_id) ON DELETE CASCADE,
+			FOREIGN KEY (contact_id) REFERENCES contacts(contact_id) ON DELETE CASCADE,
+			FOREIGN KEY (added_by) REFERENCES users(id)
+		);
+
+		-- Indexes for contacts
+		CREATE INDEX IF NOT EXISTS idx_contacts_name ON contacts(name);
+		CREATE INDEX IF NOT EXISTS idx_contacts_type ON contacts(contact_type);
+		CREATE INDEX IF NOT EXISTS idx_contacts_active ON contacts(is_active);
+		CREATE INDEX IF NOT EXISTS idx_contacts_phone ON contacts(phone);
+		CREATE INDEX IF NOT EXISTS idx_contacts_email ON contacts(email);
+		CREATE INDEX IF NOT EXISTS idx_project_contacts_project ON project_contacts(project_id);
+		CREATE INDEX IF NOT EXISTS idx_project_contacts_contact ON project_contacts(contact_id);
 	`);
 }

src/lib/queries/contacts.js

@@ -0,0 +1,327 @@
+import db from "../db.js";
+
+// Get all contacts with optional filters
+export function getAllContacts(filters = {}) {
+	let query = `
+		SELECT 
+			c.*,
+			COUNT(DISTINCT pc.project_id) as project_count
+		FROM contacts c
+		LEFT JOIN project_contacts pc ON c.contact_id = pc.contact_id
+		WHERE 1=1
+	`;
+	const params = [];
+
+	// Filter by active status
+	if (filters.is_active !== undefined) {
+		query += ` AND c.is_active = ?`;
+		params.push(filters.is_active ? 1 : 0);
+	}
+
+	// Filter by contact type
+	if (filters.contact_type) {
+		query += ` AND c.contact_type = ?`;
+		params.push(filters.contact_type);
+	}
+
+	// Search by name, phone, email, or company
+	if (filters.search) {
+		query += ` AND (
+			c.name LIKE ? OR 
+			c.phone LIKE ? OR 
+			c.email LIKE ? OR 
+			c.company LIKE ?
+		)`;
+		const searchTerm = `%${filters.search}%`;
+		params.push(searchTerm, searchTerm, searchTerm, searchTerm);
+	}
+
+	query += ` GROUP BY c.contact_id ORDER BY c.name ASC`;
+
+	return db.prepare(query).all(...params);
+}
+
+// Get contact by ID
+export function getContactById(contactId) {
+	const contact = db
+		.prepare(
+			`
+		SELECT c.*
+		FROM contacts c
+		WHERE c.contact_id = ?
+	`
+		)
+		.get(contactId);
+
+	if (!contact) return null;
+
+	// Get associated projects
+	const projects = db
+		.prepare(
+			`
+		SELECT 
+			p.project_id,
+			p.project_name,
+			p.project_number,
+			pc.relationship_type,
+			pc.is_primary,
+			pc.added_at
+		FROM project_contacts pc
+		JOIN projects p ON pc.project_id = p.project_id
+		WHERE pc.contact_id = ?
+		ORDER BY pc.is_primary DESC, pc.added_at DESC
+	`
+		)
+		.all(contactId);
+
+	return { ...contact, projects };
+}
+
+// Create new contact
+export function createContact(data) {
+	const stmt = db.prepare(`
+		INSERT INTO contacts (
+			name, phone, email, company, position, contact_type, notes, is_active
+		) VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+	`);
+
+	const result = stmt.run(
+		data.name,
+		data.phone || null,
+		data.email || null,
+		data.company || null,
+		data.position || null,
+		data.contact_type || "other",
+		data.notes || null,
+		data.is_active !== undefined ? (data.is_active ? 1 : 0) : 1
+	);
+
+	return getContactById(result.lastInsertRowid);
+}
+
+// Update contact
+export function updateContact(contactId, data) {
+	const updates = [];
+	const params = [];
+
+	if (data.name !== undefined) {
+		updates.push("name = ?");
+		params.push(data.name);
+	}
+	if (data.phone !== undefined) {
+		updates.push("phone = ?");
+		params.push(data.phone || null);
+	}
+	if (data.email !== undefined) {
+		updates.push("email = ?");
+		params.push(data.email || null);
+	}
+	if (data.company !== undefined) {
+		updates.push("company = ?");
+		params.push(data.company || null);
+	}
+	if (data.position !== undefined) {
+		updates.push("position = ?");
+		params.push(data.position || null);
+	}
+	if (data.contact_type !== undefined) {
+		updates.push("contact_type = ?");
+		params.push(data.contact_type);
+	}
+	if (data.notes !== undefined) {
+		updates.push("notes = ?");
+		params.push(data.notes || null);
+	}
+	if (data.is_active !== undefined) {
+		updates.push("is_active = ?");
+		params.push(data.is_active ? 1 : 0);
+	}
+
+	if (updates.length === 0) {
+		return getContactById(contactId);
+	}
+
+	updates.push("updated_at = CURRENT_TIMESTAMP");
+	params.push(contactId);
+
+	const query = `UPDATE contacts SET ${updates.join(", ")} WHERE contact_id = ?`;
+	db.prepare(query).run(...params);
+
+	return getContactById(contactId);
+}
+
+// Delete contact (soft delete by setting is_active = 0)
+export function deleteContact(contactId) {
+	const stmt = db.prepare(`
+		UPDATE contacts 
+		SET is_active = 0, updated_at = CURRENT_TIMESTAMP 
+		WHERE contact_id = ?
+	`);
+	return stmt.run(contactId);
+}
+
+// Hard delete contact (permanent deletion)
+export function hardDeleteContact(contactId) {
+	// First remove all project associations
+	db.prepare(`DELETE FROM project_contacts WHERE contact_id = ?`).run(
+		contactId
+	);
+
+	// Then delete the contact
+	const stmt = db.prepare(`DELETE FROM contacts WHERE contact_id = ?`);
+	return stmt.run(contactId);
+}
+
+// Get contacts for a specific project
+export function getProjectContacts(projectId) {
+	return db
+		.prepare(
+			`
+		SELECT 
+			c.*,
+			pc.relationship_type,
+			pc.is_primary,
+			pc.added_at,
+			u.name as added_by_name
+		FROM project_contacts pc
+		JOIN contacts c ON pc.contact_id = c.contact_id
+		LEFT JOIN users u ON pc.added_by = u.id
+		WHERE pc.project_id = ? AND c.is_active = 1
+		ORDER BY pc.is_primary DESC, c.name ASC
+	`
+		)
+		.all(projectId);
+}
+
+// Link contact to project
+export function linkContactToProject(
+	projectId,
+	contactId,
+	relationshipType = "general",
+	isPrimary = false,
+	userId = null
+) {
+	const stmt = db.prepare(`
+		INSERT OR REPLACE INTO project_contacts (
+			project_id, contact_id, relationship_type, is_primary, added_by
+		) VALUES (?, ?, ?, ?, ?)
+	`);
+
+	return stmt.run(
+		projectId,
+		contactId,
+		relationshipType,
+		isPrimary ? 1 : 0,
+		userId
+	);
+}
+
+// Unlink contact from project
+export function unlinkContactFromProject(projectId, contactId) {
+	const stmt = db.prepare(`
+		DELETE FROM project_contacts 
+		WHERE project_id = ? AND contact_id = ?
+	`);
+	return stmt.run(projectId, contactId);
+}
+
+// Set primary contact for a project
+export function setPrimaryContact(projectId, contactId) {
+	// First, remove primary flag from all contacts for this project
+	db.prepare(`
+		UPDATE project_contacts 
+		SET is_primary = 0 
+		WHERE project_id = ?
+	`).run(projectId);
+
+	// Then set the specified contact as primary
+	const stmt = db.prepare(`
+		UPDATE project_contacts 
+		SET is_primary = 1 
+		WHERE project_id = ? AND contact_id = ?
+	`);
+
+	return stmt.run(projectId, contactId);
+}
+
+// Get contact statistics
+export function getContactStats() {
+	return db
+		.prepare(
+			`
+		SELECT 
+			COUNT(*) as total_contacts,
+			COUNT(CASE WHEN is_active = 1 THEN 1 END) as active_contacts,
+			COUNT(CASE WHEN is_active = 0 THEN 1 END) as inactive_contacts,
+			COUNT(CASE WHEN contact_type = 'project' THEN 1 END) as project_contacts,
+			COUNT(CASE WHEN contact_type = 'contractor' THEN 1 END) as contractor_contacts,
+			COUNT(CASE WHEN contact_type = 'office' THEN 1 END) as office_contacts,
+			COUNT(CASE WHEN contact_type = 'supplier' THEN 1 END) as supplier_contacts,
+			COUNT(CASE WHEN contact_type = 'other' THEN 1 END) as other_contacts
+		FROM contacts
+	`
+		)
+		.get();
+}
+
+// Search contacts by phone number
+export function searchContactsByPhone(phoneNumber) {
+	const searchTerm = `%${phoneNumber}%`;
+	return db
+		.prepare(
+			`
+		SELECT * FROM contacts 
+		WHERE phone LIKE ? AND is_active = 1
+		ORDER BY name ASC
+	`
+		)
+		.all(searchTerm);
+}
+
+// Search contacts by email
+export function searchContactsByEmail(email) {
+	const searchTerm = `%${email}%`;
+	return db
+		.prepare(
+			`
+		SELECT * FROM contacts 
+		WHERE email LIKE ? AND is_active = 1
+		ORDER BY name ASC
+	`
+		)
+		.all(searchTerm);
+}
+
+// Bulk link contacts to project
+export function bulkLinkContactsToProject(projectId, contactIds, userId = null) {
+	const stmt = db.prepare(`
+		INSERT OR IGNORE INTO project_contacts (
+			project_id, contact_id, added_by
+		) VALUES (?, ?, ?)
+	`);
+
+	const results = contactIds.map((contactId) =>
+		stmt.run(projectId, contactId, userId)
+	);
+
+	return results;
+}
+
+// Get contacts not linked to a specific project (for selection)
+export function getAvailableContactsForProject(projectId) {
+	return db
+		.prepare(
+			`
+		SELECT c.* 
+		FROM contacts c
+		WHERE c.is_active = 1
+		AND c.contact_id NOT IN (
+			SELECT contact_id 
+			FROM project_contacts 
+			WHERE project_id = ?
+		)
+		ORDER BY c.name ASC
+	`
+		)
+		.all(projectId);
+}

src/lib/queries/projects.js

@@ -222,6 +222,7 @@ export function getProjectWithContract(id) {
 		p.*, 
 		c.contract_number, 
 		c.contract_name, 
+		c.customer_contract_number,
 		c.customer,
 		c.investor,
 		creator.name as created_by_name,

src/lib/radicale-sync.js

@@ -0,0 +1,283 @@
+/**
+ * Radicale CardDAV Sync Utility
+ * Automatically syncs contacts to Radicale server
+ */
+
+// VCARD generation helper
+export function generateVCard(contact) {
+	const lines = ['BEGIN:VCARD', 'VERSION:3.0'];
+	
+	// UID - unique identifier
+	lines.push(`UID:contact-${contact.contact_id}@panel-app`);
+	
+	// Name (FN = Formatted Name, N = Structured Name)
+	if (contact.name) {
+		lines.push(`FN:${escapeVCardValue(contact.name)}`);
+		
+		// Try to split name into components (Last;First;Middle;Prefix;Suffix)
+		const nameParts = contact.name.trim().split(/\s+/);
+		if (nameParts.length === 1) {
+			lines.push(`N:${escapeVCardValue(nameParts[0])};;;;`);
+		} else if (nameParts.length === 2) {
+			lines.push(`N:${escapeVCardValue(nameParts[1])};${escapeVCardValue(nameParts[0])};;;`);
+		} else {
+			// More than 2 parts - first is first name, rest is last name
+			const firstName = nameParts[0];
+			const lastName = nameParts.slice(1).join(' ');
+			lines.push(`N:${escapeVCardValue(lastName)};${escapeVCardValue(firstName)};;;`);
+		}
+	}
+	
+	// Organization
+	if (contact.company) {
+		lines.push(`ORG:${escapeVCardValue(contact.company)}`);
+	}
+	
+	// Title/Position
+	if (contact.position) {
+		lines.push(`TITLE:${escapeVCardValue(contact.position)}`);
+	}
+	
+	// Phone numbers - handle multiple phones
+	if (contact.phone) {
+		let phones = [];
+		try {
+			// Try to parse as JSON array
+			const parsed = JSON.parse(contact.phone);
+			phones = Array.isArray(parsed) ? parsed : [contact.phone];
+		} catch {
+			// Fall back to comma-separated or single value
+			phones = contact.phone.includes(',') 
+				? contact.phone.split(',').map(p => p.trim()).filter(p => p)
+				: [contact.phone];
+		}
+		
+		phones.forEach((phone, index) => {
+			if (phone) {
+				// First phone is WORK, others are CELL
+				const type = index === 0 ? 'WORK' : 'CELL';
+				lines.push(`TEL;TYPE=${type},VOICE:${escapeVCardValue(phone)}`);
+			}
+		});
+	}
+	
+	// Email
+	if (contact.email) {
+		lines.push(`EMAIL;TYPE=INTERNET,WORK:${escapeVCardValue(contact.email)}`);
+	}
+	
+	// Notes - combine contact type, position context, and notes
+	const noteParts = [];
+	if (contact.contact_type) {
+		const typeLabels = {
+			project: 'Kontakt projektowy',
+			contractor: 'Wykonawca',
+			office: 'Urząd',
+			supplier: 'Dostawca',
+			other: 'Inny'
+		};
+		noteParts.push(`Typ: ${typeLabels[contact.contact_type] || contact.contact_type}`);
+	}
+	if (contact.notes) {
+		noteParts.push(contact.notes);
+	}
+	if (noteParts.length > 0) {
+		lines.push(`NOTE:${escapeVCardValue(noteParts.join('\\n'))}`);
+	}
+	
+	// Categories based on contact type
+	if (contact.contact_type) {
+		const categories = {
+			project: 'Projekty',
+			contractor: 'Wykonawcy',
+			office: 'Urzędy',
+			supplier: 'Dostawcy',
+			other: 'Inne'
+		};
+		lines.push(`CATEGORIES:${categories[contact.contact_type] || 'Inne'}`);
+	}
+	
+	// Timestamps
+	if (contact.created_at) {
+		const created = new Date(contact.created_at).toISOString().replace(/[-:]/g, '').split('.')[0] + 'Z';
+		lines.push(`REV:${created}`);
+	}
+	
+	lines.push('END:VCARD');
+	
+	return lines.join('\r\n') + '\r\n';
+}
+
+// Escape special characters in VCARD values
+function escapeVCardValue(value) {
+	if (!value) return '';
+	return value
+		.replace(/\\/g, '\\\\')
+		.replace(/;/g, '\\;')
+		.replace(/,/g, '\\,')
+		.replace(/\n/g, '\\n')
+		.replace(/\r/g, '');
+}
+
+// Get Radicale configuration from environment
+export function getRadicaleConfig() {
+	const url = process.env.RADICALE_URL;
+	const username = process.env.RADICALE_USERNAME;
+	const password = process.env.RADICALE_PASSWORD;
+	
+	// Return null if not configured
+	if (!url || !username || !password) {
+		return null;
+	}
+	
+	return { url, username, password };
+}
+
+// Check if Radicale sync is enabled
+export function isRadicaleEnabled() {
+	return getRadicaleConfig() !== null;
+}
+
+// Sync contact to Radicale (internal function with retry logic)
+async function syncContactToRadicaleInternal(contact, forceUpdate = false) {
+	const config = getRadicaleConfig();
+	
+	// Skip if not configured
+	if (!config) {
+		return { success: false, reason: 'not_configured' };
+	}
+	
+	try {
+		const vcard = generateVCard(contact);
+		const auth = Buffer.from(`${config.username}:${config.password}`).toString('base64');
+		
+		// Ensure URL ends with /
+		const baseUrl = config.url.endsWith('/') ? config.url : config.url + '/';
+		
+		// Construct the URL for this specific contact
+		const vcardUrl = `${baseUrl}${config.username}/b576a569-4af7-5812-7ddd-3c7cb8caf692/contact-${contact.contact_id}.vcf`;
+		
+		const headers = {
+			'Authorization': `Basic ${auth}`,
+			'Content-Type': 'text/vcard; charset=utf-8'
+		};
+		
+		// If not forcing update, only create if doesn't exist
+		if (!forceUpdate) {
+			headers['If-None-Match'] = '*';
+		}
+		
+		const response = await fetch(vcardUrl, {
+			method: 'PUT',
+			headers: headers,
+			body: vcard
+		});
+		
+		// Handle conflict - try again with force update
+		if (response.status === 412 || response.status === 409) {
+			// Conflict - contact already exists, update it instead
+			return await syncContactToRadicaleInternal(contact, true);
+		}
+		
+		if (response.ok || response.status === 201 || response.status === 204) {
+			return { success: true, status: response.status, updated: forceUpdate };
+		} else {
+			const text = await response.text();
+			return { success: false, status: response.status, error: text };
+		}
+	} catch (error) {
+		return { success: false, error: error.message };
+	}
+}
+
+// Sync contact to Radicale
+export async function syncContactToRadicale(contact) {
+	const config = getRadicaleConfig();
+	
+	// Skip if not configured
+	if (!config) {
+		console.log('Radicale sync skipped - not configured');
+		return { success: false, reason: 'not_configured' };
+	}
+	
+	// Skip if contact is inactive
+	if (contact.is_active === 0) {
+		console.log(`Skipping inactive contact ${contact.contact_id}`);
+		return { success: true, reason: 'inactive_skipped' };
+	}
+	
+	const result = await syncContactToRadicaleInternal(contact);
+	
+	if (result.success) {
+		const action = result.updated ? 'updated' : 'created';
+		console.log(`✅ Synced contact ${contact.contact_id} to Radicale (${action})`);
+	} else if (result.reason !== 'not_configured') {
+		console.error(`❌ Failed to sync contact ${contact.contact_id} to Radicale: ${result.status} - ${result.error || result.reason}`);
+	}
+	
+	return result;
+}
+
+// Delete contact from Radicale
+export async function deleteContactFromRadicale(contactId) {
+	const config = getRadicaleConfig();
+	
+	// Skip if not configured
+	if (!config) {
+		console.log('Radicale delete skipped - not configured');
+		return { success: false, reason: 'not_configured' };
+	}
+	
+	try {
+		const auth = Buffer.from(`${config.username}:${config.password}`).toString('base64');
+		
+		// Ensure URL ends with /
+		const baseUrl = config.url.endsWith('/') ? config.url : config.url + '/';
+		
+		// Construct the URL for this specific contact
+		const vcardUrl = `${baseUrl}${config.username}/b576a569-4af7-5812-7ddd-3c7cb8caf692/contact-${contactId}.vcf`;
+		
+		const response = await fetch(vcardUrl, {
+			method: 'DELETE',
+			headers: {
+				'Authorization': `Basic ${auth}`
+			}
+		});
+		
+		if (response.ok || response.status === 204 || response.status === 404) {
+			console.log(`✅ Deleted contact ${contactId} from Radicale`);
+			return { success: true, status: response.status };
+		} else {
+			const text = await response.text();
+			console.error(`❌ Failed to delete contact ${contactId} from Radicale: ${response.status} - ${text}`);
+			return { success: false, status: response.status, error: text };
+		}
+	} catch (error) {
+		console.error(`❌ Error deleting contact ${contactId} from Radicale:`, error);
+		return { success: false, error: error.message };
+	}
+}
+
+// Sync contact asynchronously (fire and forget)
+export function syncContactAsync(contact) {
+	if (!isRadicaleEnabled()) {
+		return;
+	}
+	
+	// Run sync in background without blocking
+	syncContactToRadicale(contact).catch(error => {
+		console.error('Background sync failed:', error);
+	});
+}
+
+// Delete contact asynchronously (fire and forget)
+export function deleteContactAsync(contactId) {
+	if (!isRadicaleEnabled()) {
+		return;
+	}
+	
+	// Run delete in background without blocking
+	deleteContactFromRadicale(contactId).catch(error => {
+		console.error('Background delete failed:', error);
+	});
+}

test-contacts-query.mjs

@@ -0,0 +1,54 @@
+import db from './src/lib/db.js';
+
+console.log('Testing contacts query...\n');
+
+try {
+	// Test 1: Basic query
+	console.log('Test 1: Basic contact query');
+	const basic = db.prepare('SELECT contact_id, name FROM contacts WHERE is_active = 1 LIMIT 3').all();
+	console.log('✓ Basic query works:', basic.length, 'contacts\n');
+	
+	// Test 2: With LEFT JOIN
+	console.log('Test 2: With project_contacts join');
+	const withJoin = db.prepare(`
+		SELECT c.contact_id, c.name, COUNT(pc.project_id) as count
+		FROM contacts c
+		LEFT JOIN project_contacts pc ON c.contact_id = pc.contact_id
+		WHERE c.is_active = 1
+		GROUP BY c.contact_id
+		LIMIT 3
+	`).all();
+	console.log('✓ Join query works:', withJoin.length, 'contacts\n');
+	
+	// Test 3: With both joins
+	console.log('Test 3: With both joins (no CASE)');
+	const bothJoins = db.prepare(`
+		SELECT c.contact_id, c.name, COUNT(p.project_id) as count
+		FROM contacts c
+		LEFT JOIN project_contacts pc ON c.contact_id = pc.contact_id
+		LEFT JOIN projects p ON pc.project_id = p.project_id
+		WHERE c.is_active = 1
+		GROUP BY c.contact_id
+		LIMIT 3
+	`).all();
+	console.log('✓ Both joins work:', bothJoins.length, 'contacts\n');
+	
+	// Test 4: With CASE statement
+	console.log('Test 4: With CASE statement');
+	const withCase = db.prepare(`
+		SELECT c.contact_id, c.name,
+			COUNT(DISTINCT CASE WHEN p.is_deleted = 0 THEN p.project_id ELSE NULL END) as count
+		FROM contacts c
+		LEFT JOIN project_contacts pc ON c.contact_id = pc.contact_id
+		LEFT JOIN projects p ON pc.project_id = p.project_id
+		WHERE c.is_active = 1
+		GROUP BY c.contact_id
+		LIMIT 3
+	`).all();
+	console.log('✓ CASE query works:', withCase.length, 'contacts');
+	withCase.forEach(c => console.log(`  ${c.name}: ${c.count} active projects`));
+	
+} catch (error) {
+	console.error('❌ Query failed:', error.message);
+	console.error(error.stack);
+}

test-radicale-config.mjs

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+
+/**
+ * Test Radicale sync configuration
+ */
+
+import { getRadicaleConfig, isRadicaleEnabled, generateVCard } from './src/lib/radicale-sync.js';
+
+console.log('🧪 Testing Radicale Sync Configuration\n');
+
+// Check if enabled
+if (isRadicaleEnabled()) {
+	const config = getRadicaleConfig();
+	console.log('✅ Radicale sync is ENABLED');
+	console.log(`   URL: ${config.url}`);
+	console.log(`   Username: ${config.username}`);
+	console.log(`   Password: ${config.password ? '***' + config.password.slice(-3) : 'not set'}`);
+} else {
+	console.log('❌ Radicale sync is DISABLED');
+	console.log('   Set RADICALE_URL, RADICALE_USERNAME, and RADICALE_PASSWORD in .env.local to enable');
+}
+
+console.log('\n📝 Testing VCARD Generation\n');
+
+// Test VCARD generation
+const testContact = {
+	contact_id: 999,
+	name: 'Jan Kowalski',
+	phone: '["123-456-789", "987-654-321"]',
+	email: 'jan.kowalski@example.com',
+	company: 'Test Company',
+	position: 'Manager',
+	contact_type: 'project',
+	notes: 'Test contact for VCARD generation',
+	is_active: 1,
+	created_at: new Date().toISOString()
+};
+
+const vcard = generateVCard(testContact);
+console.log('Generated VCARD:');
+console.log('─'.repeat(60));
+console.log(vcard);
+console.log('─'.repeat(60));
+
+console.log('\n✅ Test complete!');