Add UV run support and systemd service installer

**UV Integration:**
- Updated pyproject.toml with [tool.uv.scripts]
- Added 'uv run start' to launch wedding phone
- Added 'uv run test' to run audio tests
- Refactored main code into main() function
- Added proper entry point for package installation

**Systemd Service:**
- Created wedding-phone.service template
- Service runs with UV for dependency management
- Automatic restart on failure
- Proper security hardening (NoNewPrivileges, PrivateTmp)
- GPIO and audio group access configured

**Service Installer:**
- Created install_service.sh automated installer
- Auto-detects project path and user
- Checks for UV installation and dependencies
- Configures service file with correct paths
- Option to enable and start immediately
- Provides helpful command reference

**Installer Features:**
- Validates config.json exists (creates from example if missing)
- Installs UV dependencies automatically
- Updates service file paths dynamically
- Color-coded output for clarity
- Error checking at each step
- Clean installation process

**Usage:**
```bash
# Run directly with UV
uv run start

# Install as system service
./install_service.sh

# Service management
sudo systemctl start wedding-phone
sudo systemctl stop wedding-phone
sudo journalctl -u wedding-phone -f
```

**Documentation:**
- Updated README with UV commands
- Added service installation guide
- Removed old manual systemd instructions
- Added service management commands
- Updated file structure documentation

**Benefits:**
- Easier to run (single command)
- Automatic startup on boot
- Better dependency management
- Professional service integration
- Simplified installation process

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

README.md

@@ -141,6 +141,18 @@ This will test:
 
 ### 7. Run the System
 
+#### Option A: Run Directly with UV (Recommended)
+
+```bash
+# Run the wedding phone system
+uv run start
+
+# Or run the audio test
+uv run test
+```
+
+#### Option B: Run with Python
+
 ```bash
 python3 rotary_phone_web.py
 ```
@@ -149,6 +161,46 @@ The web interface will be available at:
 - `http://localhost:8080`
 - `http://<raspberry-pi-ip>:8080`
 
+### 8. Install as System Service (Optional)
+
+To run the wedding phone automatically on boot:
+
+```bash
+# Run the installer script
+./install_service.sh
+```
+
+The installer will:
+- Check dependencies
+- Install the systemd service
+- Configure for your user and project path
+- Optionally enable and start the service
+
+**Manual service commands:**
+
+```bash
+# Enable service to start on boot
+sudo systemctl enable wedding-phone
+
+# Start service now
+sudo systemctl start wedding-phone
+
+# Stop service
+sudo systemctl stop wedding-phone
+
+# Restart service
+sudo systemctl restart wedding-phone
+
+# View logs (live)
+sudo journalctl -u wedding-phone -f
+
+# View status
+sudo systemctl status wedding-phone
+
+# Disable service
+sudo systemctl disable wedding-phone
+```
+
 ## Usage
 
 ### Web Interface
@@ -282,6 +334,8 @@ wedding-phone/
 ├── rotary_phone_web.py       # Main application
 ├── test_complete.py           # Audio testing script
 ├── configure_hifiberry.sh     # HiFiBerry setup script
+├── install_service.sh         # Systemd service installer
+├── wedding-phone.service      # Systemd service file
 ├── config.example.json       # Example configuration (copy to config.json)
 ├── pyproject.toml            # UV/pip package configuration
 ├── AUDIO_FIX.md              # Audio configuration guide
@@ -423,42 +477,6 @@ If the script won't start:
 3. Check all paths exist or can be created
 4. Verify audio device index is correct
 
-## Auto-start on Boot
-
-Create a systemd service:
-
-```bash
-sudo nano /etc/systemd/system/wedding-phone.service
-```
-
-Add (replace `/path/to/wedding-phone` with your actual path):
-
-```ini
-[Unit]
-Description=Wedding Phone Service
-After=network.target sound.target
-
-[Service]
-Type=simple
-User=pi
-WorkingDirectory=/path/to/wedding-phone
-ExecStart=/usr/bin/python3 /path/to/wedding-phone/rotary_phone_web.py
-Restart=always
-RestartSec=10
-
-[Install]
-WantedBy=multi-user.target
-```
-
-Enable and start:
-
-```bash
-sudo systemctl daemon-reload
-sudo systemctl enable wedding-phone.service
-sudo systemctl start wedding-phone.service
-sudo systemctl status wedding-phone.service
-```
-
 ## API Endpoints
 
 The system provides REST API endpoints: