Add system shutdown/restart functionality via web interface

This commit adds the ability to safely shutdown or restart the Raspberry Pi
from the web interface, with proper sudo permissions and user confirmations.

Features:
- API endpoints for /api/system/shutdown and /api/system/restart
- System Control card in UI with shutdown and restart buttons
- JavaScript confirmation dialogs to prevent accidental shutdowns
- Shutdown has 1-minute delay, restart is immediate
- Auto-reload after restart (30 second delay)
- Sudoers file for passwordless sudo commands

Technical details:
- Uses subprocess.Popen() for non-blocking command execution
- Shutdown: 'sudo shutdown -h +1' (1 minute delay)
- Restart: 'sudo reboot' (immediate)
- Created wedding-phone-shutdown sudoers file
- Template version updated to 1.9.0

Installation required:
sudo cp wedding-phone-shutdown /etc/sudoers.d/wedding-phone-shutdown
sudo chmod 0440 /etc/sudoers.d/wedding-phone-shutdown

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

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

rotary_phone_web.py

@@ -151,7 +151,7 @@ BACKUP_ON_WRITE = BACKUP_CONFIG.get('backup_on_write', True)
 WEB_PORT = SYS_CONFIG['web']['port']
 
 # Template version - increment this when HTML template changes
-TEMPLATE_VERSION = "1.8.0"  # Updated: Added recording sorting by date, name, duration, size
+TEMPLATE_VERSION = "1.9.0"  # Updated: Added system shutdown/restart controls
 
 # Flask app
 app = Flask(__name__)
@@ -975,6 +975,28 @@ def api_backup_test():
     except Exception as e:
         return jsonify({"success": False, "error": str(e)}), 500
 
+@app.route('/api/system/shutdown', methods=['POST'])
+def api_system_shutdown():
+    """Shutdown the Raspberry Pi"""
+    try:
+        import subprocess
+        # Schedule shutdown in 1 minute to allow response to be sent
+        subprocess.Popen(['sudo', 'shutdown', '-h', '+1'])
+        return jsonify({"success": True, "message": "System will shutdown in 1 minute"})
+    except Exception as e:
+        return jsonify({"success": False, "error": str(e)}), 500
+
+@app.route('/api/system/restart', methods=['POST'])
+def api_system_restart():
+    """Restart the Raspberry Pi"""
+    try:
+        import subprocess
+        # Schedule restart to allow response to be sent
+        subprocess.Popen(['sudo', 'reboot'])
+        return jsonify({"success": True, "message": "System will restart shortly"})
+    except Exception as e:
+        return jsonify({"success": False, "error": str(e)}), 500
+
 @app.route('/upload_greeting', methods=['POST'])
 def upload_greeting():
     """Upload a new greeting message"""
@@ -1869,6 +1891,30 @@ def main():
             </div>
         </div>
 
+        <!-- System Control Card -->
+        <div class="card">
+            <h2>⚙️ System Control</h2>
+
+            <div style="padding: 20px;">
+                <p style="margin: 0 0 20px 0; color: #6b7280; text-align: center;">
+                    Safely shutdown or restart the Raspberry Pi
+                </p>
+
+                <div style="display: flex; gap: 15px; justify-content: center; flex-wrap: wrap;">
+                    <button class="btn btn-danger" onclick="shutdownSystem()" style="min-width: 150px;">
+                        🔌 Shutdown
+                    </button>
+                    <button class="btn btn-warning" onclick="restartSystem()" style="min-width: 150px; background: #f59e0b;">
+                        🔄 Restart
+                    </button>
+                </div>
+
+                <p style="margin-top: 15px; color: #9ca3af; font-size: 0.8em; text-align: center;">
+                    ⚠️ System will shutdown/restart after confirmation
+                </p>
+            </div>
+        </div>
+
         <!-- Sound Assignment Card -->
         <div class="card">
             <h2>🎵 Sound Assignment</h2>
@@ -2473,6 +2519,53 @@ def main():
             }, 5000);
         }
 
+        // System Control Functions
+        function shutdownSystem() {
+            if (confirm('⚠️ Are you sure you want to SHUTDOWN the system?\n\nThe Raspberry Pi will power off in 1 minute.')) {
+                fetch('/api/system/shutdown', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' }
+                })
+                .then(response => response.json())
+                .then(data => {
+                    if (data.success) {
+                        showAlert('🔌 System shutting down in 1 minute...', 'warning');
+                        setTimeout(() => {
+                            showAlert('System is now shutting down. This page will be unavailable.', 'error');
+                        }, 3000);
+                    } else {
+                        showAlert('Error: ' + data.error, 'error');
+                    }
+                })
+                .catch(error => showAlert('Error: ' + error, 'error'));
+            }
+        }
+
+        function restartSystem() {
+            if (confirm('⚠️ Are you sure you want to RESTART the system?\n\nThe Raspberry Pi will reboot shortly.')) {
+                fetch('/api/system/restart', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' }
+                })
+                .then(response => response.json())
+                .then(data => {
+                    if (data.success) {
+                        showAlert('🔄 System restarting...', 'warning');
+                        setTimeout(() => {
+                            showAlert('System is rebooting. Page will reload automatically.', 'warning');
+                            // Try to reload page after 30 seconds
+                            setTimeout(() => {
+                                location.reload();
+                            }, 30000);
+                        }, 3000);
+                    } else {
+                        showAlert('Error: ' + data.error, 'error');
+                    }
+                })
+                .catch(error => showAlert('Error: ' + error, 'error'));
+            }
+        }
+
         // USB Backup Functions
         function refreshBackupStatus() {
             fetch('/api/backup/status')

wedding-phone-shutdown

@@ -0,0 +1,8 @@
+# Allow wedding-phone user to shutdown and reboot without password
+# Copy this file to /etc/sudoers.d/wedding-phone-shutdown
+# Usage: sudo cp wedding-phone-shutdown /etc/sudoers.d/wedding-phone-shutdown
+# Then: sudo chmod 0440 /etc/sudoers.d/wedding-phone-shutdown
+
+# Allow user to run shutdown and reboot commands without password
+berwn ALL=(ALL) NOPASSWD: /sbin/shutdown
+berwn ALL=(ALL) NOPASSWD: /sbin/reboot