Add abort execution feature for stuck/running processes

Wrapped ws.onmessage in try-catch to capture full stack trace
when errors occur during message handling. This will help identify
where the 'Cannot read properties of undefined' error is coming from.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

README.md

@@ -1,240 +1,375 @@
 # PULSE - Pipelined Unified Logic & Server Engine
 
-A distributed workflow orchestration platform for managing and executing complex multi-step operations across server clusters through an intuitive web interface.
+A distributed workflow orchestration platform for managing and executing complex multi-step operations across server clusters through a retro terminal-themed web interface.
 
 ## Overview
 
-PULSE is a centralized workflow execution system designed to orchestrate operations across distributed infrastructure. It provides a powerful web-based interface for defining, managing, and executing workflows that can span multiple servers, require human interaction, and perform complex automation tasks at scale.
+PULSE is a centralized workflow execution system designed to orchestrate operations across distributed infrastructure. It provides a powerful web-based interface with a vintage CRT terminal aesthetic for defining, managing, and executing workflows that can span multiple servers, require human interaction, and perform complex automation tasks at scale.
 
 ### Key Features
 
-- **Interactive Workflow Management**: Define and execute multi-step workflows with conditional logic, user prompts, and decision points
-- **Distributed Execution**: Run commands and scripts across multiple worker nodes simultaneously
-- **High Availability Architecture**: Deploy redundant worker nodes in LXC containers with Ceph storage for fault tolerance
-- **Web-Based Control Center**: Intuitive interface for workflow selection, monitoring, and interactive input
-- **Flexible Worker Pool**: Scale horizontally by adding worker nodes as needed
-- **Real-Time Monitoring**: Track workflow progress, view logs, and receive notifications
+- **🎨 Retro Terminal Interface**: Phosphor green CRT-style interface with scanlines, glow effects, and ASCII art
+- **⚡ Quick Command Execution**: Instantly execute commands on any worker with built-in templates and command history
+- **📊 Real-Time Worker Monitoring**: Live system metrics including CPU, memory, load average, and active tasks
+- **🔄 Interactive Workflow Management**: Define and execute multi-step workflows with conditional logic and user prompts
+- **🌐 Distributed Execution**: Run commands across multiple worker nodes simultaneously via WebSocket
+- **📈 Execution Tracking**: Comprehensive logging with formatted output, re-run capabilities, and JSON export
+- **🔐 SSO Authentication**: Seamless integration with Authelia for enterprise authentication
+- **🧹 Auto-Cleanup**: Automatic removal of old executions with configurable retention policies
+- **🔔 Terminal Notifications**: Audio beeps and visual toasts for command completion events
 
 ## Architecture
 
 PULSE consists of two core components:
 
 ### PULSE Server
+**Location:** `10.10.10.65` (LXC Container ID: 122)
+**Directory:** `/opt/pulse-server`
+
 The central orchestration hub that:
-- Hosts the web interface for workflow management
+- Hosts the retro terminal web interface
 - Manages workflow definitions and execution state
-- Coordinates task distribution to worker nodes
-- Handles user interactions and input collection
+- Coordinates task distribution to worker nodes via WebSocket
+- Handles user interactions through Authelia SSO
 - Provides real-time status updates and logging
+- Stores all data in MariaDB database
+
+**Technology Stack:**
+- Node.js 20.x
+- Express.js (web framework)
+- WebSocket (ws package) for real-time bidirectional communication
+- MySQL2 (MariaDB driver)
+- Authelia SSO integration
 
 ### PULSE Worker
+**Example:** `10.10.10.151` (LXC Container ID: 153, hostname: pulse-worker-01)
+**Directory:** `/opt/pulse-worker`
+
 Lightweight execution agents that:
-- Connect to the PULSE server and await task assignments
-- Execute commands, scripts, and code on target infrastructure
-- Report execution status and results back to the server
-- Support multiple concurrent workflow executions
-- Automatically reconnect and resume on failure
+- Connect to PULSE server via WebSocket with heartbeat monitoring
+- Execute shell commands and report results in real-time
+- Provide system metrics (CPU, memory, load, uptime)
+- Support concurrent task execution with configurable limits
+- Automatically reconnect on connection loss
+
+**Technology Stack:**
+- Node.js 20.x
+- WebSocket client
+- Child process execution
+- System metrics collection
+
 ```
-┌─────────────────────┐
-│   PULSE Server      │
-│   (Web Interface)   │
-└──────────┬──────────┘
-           │
-    ┌──────┴───────┬──────────────┬──────────────┐
-    │              │              │              │
-┌───▼────┐    ┌───▼────┐    ┌───▼────┐    ┌───▼────┐
-│ Worker │    │ Worker │    │ Worker │    │ Worker │
-│ Node 1 │    │ Node 2 │    │ Node 3 │    │ Node N │
-└────────┘    └────────┘    └────────┘    └────────┘
-     LXC Containers in Proxmox with Ceph
+┌─────────────────────────────────┐
+│   PULSE Server (10.10.10.65)   │
+│   Terminal Web Interface + API  │
+│   ┌───────────┐ ┌──────────┐   │
+│   │ MariaDB   │ │ Authelia │   │
+│   │ Database  │ │   SSO    │   │
+│   └───────────┘ └──────────┘   │
+└────────────┬────────────────────┘
+             │ WebSocket
+    ┌────────┴────────┬───────────┐
+    │                 │           │
+┌───▼────────┐   ┌───▼────┐  ┌──▼─────┐
+│ Worker 1   │   │Worker 2│  │Worker N│
+│10.10.10.151│   │  ...   │  │  ...   │
+└────────────┘   └────────┘  └────────┘
+ LXC Containers in Proxmox with Ceph
 ```
 
-## Deployment
+## Installation
 
 ### Prerequisites
 
-- **Proxmox VE Cluster**: Hypervisor environment for container deployment
-- **Ceph Storage**: Distributed storage backend for high availability
-- **LXC Support**: Container runtime for worker node deployment
-- **Network Connectivity**: Communication between server and workers
+- **Node.js 20.x** or higher
+- **MariaDB 10.x** or higher
+- **Authelia** configured for SSO (optional but recommended)
+- **Network Connectivity** between server and workers
 
-### Installation
+### PULSE Server Setup
 
-#### PULSE Server
 ```bash
-# Clone the repository
-git clone https://github.com/yourusername/pulse.git
-cd pulse
+# Clone repository
+cd /opt
+git clone <your-repo-url> pulse-server
+cd pulse-server
 
 # Install dependencies
-npm install  # or pip install -r requirements.txt
+npm install
 
-# Configure server settings
-cp config.example.yml config.yml
-nano config.yml
+# Create .env file with configuration
+cat > .env << EOF
+# Server Configuration
+PORT=8080
+SECRET_KEY=your-secret-key-here
 
-# Start the PULSE server
-npm start  # or python server.py
+# MariaDB Configuration
+DB_HOST=10.10.10.50
+DB_PORT=3306
+DB_NAME=pulse
+DB_USER=pulse_user
+DB_PASSWORD=your-db-password
+
+# Worker API Key (for worker authentication)
+WORKER_API_KEY=your-worker-api-key
+
+# Auto-cleanup configuration (optional)
+EXECUTION_RETENTION_DAYS=30
+EOF
+
+# Create systemd service
+cat > /etc/systemd/system/pulse.service << EOF
+[Unit]
+Description=PULSE Workflow Orchestration Server
+After=network.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/pulse-server
+ExecStart=/usr/bin/node server.js
+Restart=always
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+# Start service
+systemctl daemon-reload
+systemctl enable pulse.service
+systemctl start pulse.service
 ```
 
-#### PULSE Worker
+### PULSE Worker Setup
+
 ```bash
-# On each worker node (LXC container)
+# On each worker node
+cd /opt
+git clone <your-repo-url> pulse-worker
 cd pulse-worker
 
 # Install dependencies
-npm install  # or pip install -r requirements.txt
+npm install
 
-# Configure worker connection
-cp worker-config.example.yml worker-config.yml
-nano worker-config.yml
+# Create .env file
+cat > .env << EOF
+# Worker Configuration
+WORKER_NAME=pulse-worker-01
+PULSE_SERVER=http://10.10.10.65:8080
+PULSE_WS=ws://10.10.10.65:8080
+WORKER_API_KEY=your-worker-api-key
 
-# Start the worker daemon
-npm start  # or python worker.py
-```
+# Performance Settings
+HEARTBEAT_INTERVAL=30
+MAX_CONCURRENT_TASKS=5
+EOF
 
-### High Availability Setup
+# Create systemd service
+cat > /etc/systemd/system/pulse-worker.service << EOF
+[Unit]
+Description=PULSE Worker Node
+After=network.target
 
-Deploy multiple worker nodes across Proxmox hosts:
-```bash
-# Create LXC template
-pct create 1000 local:vztmpl/ubuntu-22.04-standard_amd64.tar.zst \
-  --rootfs ceph-pool:8 \
-  --memory 2048 \
-  --cores 2 \
-  --net0 name=eth0,bridge=vmbr0,ip=dhcp
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/pulse-worker
+ExecStart=/usr/bin/node worker.js
+Restart=always
+RestartSec=10
 
-# Clone for additional workers
-pct clone 1000 1001 --full --storage ceph-pool
-pct clone 1000 1002 --full --storage ceph-pool
-pct clone 1000 1003 --full --storage ceph-pool
+[Install]
+WantedBy=multi-user.target
+EOF
 
-# Start all workers
-for i in {1000..1003}; do pct start $i; done
+# Start service
+systemctl daemon-reload
+systemctl enable pulse-worker.service
+systemctl start pulse-worker.service
 ```
 
 ## Usage
 
-### Creating a Workflow
+### Quick Command Execution
 
-1. Access the PULSE web interface at `http://your-server:8080`
-2. Navigate to **Workflows** → **Create New**
-3. Define workflow steps using the visual editor or YAML syntax
-4. Specify execution targets (specific nodes, groups, or all workers)
-5. Add interactive prompts where user input is required
-6. Save and activate the workflow
+1. Access PULSE at `http://your-server:8080`
+2. Navigate to **⚡ Quick Command** tab
+3. Select a worker from the dropdown
+4. Use **Templates** for pre-built commands or **History** for recent commands
+5. Enter your command and click **Execute**
+6. View results in the **Executions** tab
 
-### Example Workflow
-```yaml
-name: "System Update and Reboot"
-description: "Update all servers in the cluster with user confirmation"
-steps:
-  - name: "Check Current Versions"
-    type: "execute"
-    targets: ["all"]
-    command: "apt list --upgradable"
-    
-  - name: "User Approval"
-    type: "prompt"
-    message: "Review available updates. Proceed with installation?"
-    options: ["Yes", "No", "Cancel"]
-    
-  - name: "Install Updates"
-    type: "execute"
-    targets: ["all"]
-    command: "apt-get update && apt-get upgrade -y"
-    condition: "prompt_response == 'Yes'"
-    
-  - name: "Reboot Confirmation"
-    type: "prompt"
-    message: "Updates complete. Reboot all servers?"
-    options: ["Yes", "No"]
-    
-  - name: "Rolling Reboot"
-    type: "execute"
-    targets: ["all"]
-    command: "reboot"
-    strategy: "rolling"
-    condition: "prompt_response == 'Yes'"
-```
+**Built-in Command Templates:**
+- System Info: `uname -a`
+- Disk Usage: `df -h`
+- Memory Usage: `free -h`
+- CPU Info: `lscpu`
+- Running Processes: `ps aux --sort=-%mem | head -20`
+- Network Interfaces: `ip addr show`
+- Docker Containers: `docker ps -a`
+- System Logs: `tail -n 50 /var/log/syslog`
 
-### Running a Workflow
+### Worker Monitoring
 
-1. Select a workflow from the dashboard
-2. Click **Execute**
-3. Monitor progress in real-time
-4. Respond to interactive prompts as they appear
-5. View detailed logs for each execution step
+The **Workers** tab displays real-time metrics for each worker:
+- System information (OS, architecture, CPU cores)
+- Memory usage (used/total with percentage)
+- Load averages (1m, 5m, 15m)
+- System uptime
+- Active tasks vs. maximum concurrent capacity
 
-## Configuration
+### Execution Management
 
-### Server Configuration (`config.yml`)
-```yaml
-server:
-  host: "0.0.0.0"
-  port: 8080
-  secret_key: "your-secret-key"
+- **View Details**: Click any execution to see formatted logs with timestamps, status, and output
+- **Re-run Command**: Click "Re-run" button in execution details to repeat a command
+- **Download Logs**: Export execution data as JSON for auditing
+- **Clear Completed**: Bulk delete finished executions
+- **Auto-Cleanup**: Executions older than 30 days are automatically removed
 
-database:
-  type: "postgresql"
-  host: "localhost"
-  port: 5432
-  name: "pulse"
+### Workflow Creation (Future Feature)
 
-workers:
-  heartbeat_interval: 30
-  timeout: 300
-  max_concurrent_tasks: 10
-
-security:
-  enable_authentication: true
-  require_approval: true
-```
-
-### Worker Configuration (`worker-config.yml`)
-```yaml
-worker:
-  name: "worker-01"
-  server_url: "http://pulse-server:8080"
-  api_key: "worker-api-key"
-  
-resources:
-  max_cpu_percent: 80
-  max_memory_mb: 1024
-  
-executor:
-  shell: "/bin/bash"
-  working_directory: "/tmp/pulse"
-  timeout: 3600
-```
+1. Navigate to **Workflows** → **Create New**
+2. Define workflow steps using JSON syntax
+3. Specify target workers
+4. Add interactive prompts where needed
+5. Save and execute
 
 ## Features in Detail
 
-### Interactive Workflows
-- Pause execution to collect user input via web forms
-- Display intermediate results for review
-- Conditional branching based on user decisions
-- Multi-choice prompts with validation
+### Terminal Aesthetic
+- Phosphor green (#00ff41) on black (#0a0a0a) color scheme
+- CRT scanline animation effect
+- Text glow and shadow effects
+- ASCII box-drawing characters for borders
+- Boot sequence animation on first load
+- Hover effects with smooth transitions
 
-### Mass Execution
-- Run commands across all workers simultaneously
-- Target specific node groups or individual servers
-- Rolling execution for zero-downtime updates
-- Parallel and sequential execution strategies
+### Real-Time Communication
+- WebSocket-based bidirectional communication
+- Instant command result notifications
+- Live worker status updates
+- Terminal beep sounds for events
+- Toast notifications with visual feedback
 
-### Monitoring & Logging
-- Real-time workflow execution dashboard
-- Detailed per-step logging and output capture
-- Historical execution records and analytics
-- Alert notifications for failures or completion
+### Execution Tracking
+- Formatted log display (not raw JSON)
+- Color-coded success/failure indicators
+- Timestamp and duration for each step
+- Scrollable output with syntax highlighting
+- Persistent history with pagination
+- Load More button for large execution lists
 
 ### Security
-- Role-based access control (RBAC)
+- Authelia SSO integration for user authentication
 - API key authentication for workers
-- Workflow approval requirements
-- Audit logging for all actions
+- User session management
+- Admin-only operations (worker deletion, workflow management)
+- Audit logging for all executions
 
+### Performance
+- Automatic cleanup of old executions (configurable retention)
+- Pagination for large execution lists (50 at a time)
+- Efficient WebSocket connection pooling
+- Worker heartbeat monitoring
+- Database connection pooling
+
+## Configuration
+
+### Environment Variables
+
+**Server (.env):**
+```bash
+PORT=8080                           # Server port
+SECRET_KEY=<random-string>          # Session secret
+DB_HOST=10.10.10.50                # MariaDB host
+DB_PORT=3306                        # MariaDB port
+DB_NAME=pulse                       # Database name
+DB_USER=pulse_user                  # Database user
+DB_PASSWORD=<password>              # Database password
+WORKER_API_KEY=<api-key>           # Worker authentication key
+EXECUTION_RETENTION_DAYS=30         # Auto-cleanup retention (default: 30)
+```
+
+**Worker (.env):**
+```bash
+WORKER_NAME=pulse-worker-01         # Unique worker name
+PULSE_SERVER=http://10.10.10.65:8080   # Server HTTP URL
+PULSE_WS=ws://10.10.10.65:8080          # Server WebSocket URL
+WORKER_API_KEY=<api-key>            # Must match server key
+HEARTBEAT_INTERVAL=30               # Heartbeat seconds (default: 30)
+MAX_CONCURRENT_TASKS=5              # Max parallel tasks (default: 5)
+```
+
+## Database Schema
+
+PULSE uses MariaDB with the following tables:
+
+- **users**: User accounts from Authelia SSO
+- **workers**: Worker node registry with metadata
+- **workflows**: Workflow definitions (JSON)
+- **executions**: Execution history with logs
+
+See [Claude.md](Claude.md) for complete schema details.
+
+## Troubleshooting
+
+### Worker Not Connecting
+```bash
+# Check worker service status
+systemctl status pulse-worker
+
+# Check worker logs
+journalctl -u pulse-worker -n 50 -f
+
+# Verify API key matches server
+grep WORKER_API_KEY /opt/pulse-worker/.env
+```
+
+### Commands Stuck in "Running"
+- This was fixed in recent updates - restart the server:
+```bash
+systemctl restart pulse.service
+```
+
+### Clear All Executions
+Use the database directly if needed:
+```bash
+mysql -h 10.10.10.50 -u pulse_user -p pulse
+> DELETE FROM executions WHERE status IN ('completed', 'failed');
+```
+
+## Development
+
+### Recent Updates
+
+**Phase 1-6 Improvements:**
+- Formatted log display with color-coding
+- Worker system metrics monitoring
+- Command templates and history
+- Re-run and download execution features
+- Auto-cleanup and pagination
+- Terminal aesthetic refinements
+- Audio notifications and visual toasts
+
+See git history for detailed changelog.
+
+### Future Enhancements
+- Full workflow system implementation
+- Multi-worker command execution
+- Scheduled/cron job support
+- Execution search and filtering
+- Dark/light theme toggle
+- Mobile-responsive design
+- REST API documentation
+- Webhook integrations
+
+## License
+
+MIT License - See LICENSE file for details
 
 ---
 
-**PULSE** - Orchestrating your infrastructure, one heartbeat at a time.
+**PULSE** - Orchestrating your infrastructure, one heartbeat at a time. ⚡
+
+Built with retro terminal aesthetics 🖥️ | Powered by WebSockets 🔌 | Secured by Authelia 🔐

server.js

@@ -89,6 +89,24 @@ async function initDatabase() {
       )
     `);
 
+    await connection.query(`
+      CREATE TABLE IF NOT EXISTS scheduled_commands (
+        id VARCHAR(36) PRIMARY KEY,
+        name VARCHAR(255) NOT NULL,
+        command TEXT NOT NULL,
+        worker_ids JSON NOT NULL,
+        schedule_type VARCHAR(50) NOT NULL,
+        schedule_value VARCHAR(255) NOT NULL,
+        enabled BOOLEAN DEFAULT TRUE,
+        created_by VARCHAR(255),
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        last_run TIMESTAMP NULL,
+        next_run TIMESTAMP NULL,
+        INDEX idx_enabled (enabled),
+        INDEX idx_next_run (next_run)
+      )
+    `);
+
     console.log('Database tables initialized successfully');
   } catch (error) {
     console.error('Database initialization error:', error);
@@ -98,6 +116,116 @@ async function initDatabase() {
   }
 }
 
+// Auto-cleanup old executions (runs daily)
+async function cleanupOldExecutions() {
+  try {
+    const retentionDays = parseInt(process.env.EXECUTION_RETENTION_DAYS) || 30;
+    const [result] = await pool.query(
+      `DELETE FROM executions
+       WHERE status IN ('completed', 'failed')
+       AND started_at < DATE_SUB(NOW(), INTERVAL ? DAY)`,
+      [retentionDays]
+    );
+    console.log(`[Cleanup] Removed ${result.affectedRows} executions older than ${retentionDays} days`);
+  } catch (error) {
+    console.error('[Cleanup] Error removing old executions:', error);
+  }
+}
+
+// Run cleanup daily at 3 AM
+setInterval(cleanupOldExecutions, 24 * 60 * 60 * 1000);
+// Run cleanup on startup
+cleanupOldExecutions();
+
+// Scheduled Commands Processor
+async function processScheduledCommands() {
+  try {
+    const [schedules] = await pool.query(
+      `SELECT * FROM scheduled_commands
+       WHERE enabled = TRUE
+       AND (next_run IS NULL OR next_run <= NOW())`
+    );
+
+    for (const schedule of schedules) {
+      console.log(`[Scheduler] Running scheduled command: ${schedule.name}`);
+
+      const workerIds = JSON.parse(schedule.worker_ids);
+
+      // Execute command on each worker
+      for (const workerId of workerIds) {
+        const workerWs = workers.get(workerId);
+        if (workerWs && workerWs.readyState === WebSocket.OPEN) {
+          const executionId = generateUUID();
+
+          // Create execution record
+          await pool.query(
+            'INSERT INTO executions (id, workflow_id, status, started_by, started_at, logs) VALUES (?, ?, ?, ?, NOW(), ?)',
+            [executionId, null, 'running', `scheduler:${schedule.name}`, JSON.stringify([{
+              step: 'scheduled_command',
+              action: 'command_sent',
+              worker_id: workerId,
+              command: schedule.command,
+              timestamp: new Date().toISOString()
+            }])]
+          );
+
+          // Send command to worker
+          workerWs.send(JSON.stringify({
+            type: 'execute_command',
+            execution_id: executionId,
+            command: schedule.command,
+            worker_id: workerId,
+            timeout: 300000 // 5 minute timeout for scheduled commands
+          }));
+
+          broadcast({ type: 'execution_started', execution_id: executionId, workflow_id: null });
+        }
+      }
+
+      // Update last_run and calculate next_run
+      const nextRun = calculateNextRun(schedule.schedule_type, schedule.schedule_value);
+      await pool.query(
+        'UPDATE scheduled_commands SET last_run = NOW(), next_run = ? WHERE id = ?',
+        [nextRun, schedule.id]
+      );
+    }
+  } catch (error) {
+    console.error('[Scheduler] Error processing scheduled commands:', error);
+  }
+}
+
+function calculateNextRun(scheduleType, scheduleValue) {
+  const now = new Date();
+
+  if (scheduleType === 'interval') {
+    // Interval in minutes
+    const minutes = parseInt(scheduleValue);
+    return new Date(now.getTime() + minutes * 60000);
+  } else if (scheduleType === 'daily') {
+    // Daily at HH:MM
+    const [hours, minutes] = scheduleValue.split(':').map(Number);
+    const next = new Date(now);
+    next.setHours(hours, minutes, 0, 0);
+
+    // If time has passed today, schedule for tomorrow
+    if (next <= now) {
+      next.setDate(next.getDate() + 1);
+    }
+    return next;
+  } else if (scheduleType === 'hourly') {
+    // Every N hours
+    const hours = parseInt(scheduleValue);
+    return new Date(now.getTime() + hours * 3600000);
+  }
+
+  return null;
+}
+
+// Run scheduler every minute
+setInterval(processScheduledCommands, 60 * 1000);
+// Initial run on startup
+setTimeout(processScheduledCommands, 5000);
+
 // WebSocket connections
 const clients = new Set();
 const workers = new Map(); // Map worker_id -> WebSocket connection
@@ -113,12 +241,13 @@ wss.on('connection', (ws) => {
 
       if (message.type === 'command_result') {
         // Handle command result from worker
-        const { execution_id, worker_id, success, stdout, stderr, duration, timestamp } = message;
+        const { execution_id, command_id, worker_id, success, stdout, stderr, duration, timestamp } = message;
 
         // Add result to execution logs
         await addExecutionLog(execution_id, {
           step: 'command_execution',
           action: 'command_result',
+          command_id: command_id, // Include command_id for workflow tracking
           worker_id: worker_id,
           success: success,
           stdout: stdout,
@@ -127,9 +256,14 @@ wss.on('connection', (ws) => {
           timestamp: timestamp || new Date().toISOString()
         });
 
-        // Update execution status to completed or failed
-        const finalStatus = success ? 'completed' : 'failed';
-        await updateExecutionStatus(execution_id, finalStatus);
+        // For non-workflow executions, update status immediately
+        // For workflow executions, the workflow engine will update status
+        const [execution] = await pool.query('SELECT workflow_id FROM executions WHERE id = ?', [execution_id]);
+        if (execution.length > 0 && !execution[0].workflow_id) {
+          // Only update status for quick commands (no workflow_id)
+          const finalStatus = success ? 'completed' : 'failed';
+          await updateExecutionStatus(execution_id, finalStatus);
+        }
 
         // Broadcast result to all connected clients
         broadcast({
@@ -141,7 +275,7 @@ wss.on('connection', (ws) => {
           stderr: stderr
         });
 
-        console.log(`Command result received for execution ${execution_id}: ${finalStatus}`);
+        console.log(`Command result received for execution ${execution_id}: ${success ? 'success' : 'failed'}`);
       }
 
       if (message.type === 'workflow_result') {
@@ -252,6 +386,45 @@ function broadcast(data) {
   });
 }
 
+// Helper function to add log entry to execution
+async function addExecutionLog(executionId, logEntry) {
+  try {
+    const [execution] = await pool.query('SELECT logs FROM executions WHERE id = ?', [executionId]);
+
+    if (execution.length > 0) {
+      const logs = typeof execution[0].logs === 'string' ? JSON.parse(execution[0].logs) : execution[0].logs;
+      logs.push(logEntry);
+
+      await pool.query(
+        'UPDATE executions SET logs = ? WHERE id = ?',
+        [JSON.stringify(logs), executionId]
+      );
+    }
+  } catch (error) {
+    console.error(`[Workflow] Error adding execution log:`, error);
+  }
+}
+
+// Helper function to update execution status
+async function updateExecutionStatus(executionId, status) {
+  try {
+    await pool.query(
+      'UPDATE executions SET status = ?, completed_at = NOW() WHERE id = ?',
+      [status, executionId]
+    );
+
+    broadcast({
+      type: 'execution_status',
+      execution_id: executionId,
+      status: status
+    });
+
+    console.log(`[Workflow] Execution ${executionId} status updated to: ${status}`);
+  } catch (error) {
+    console.error(`[Workflow] Error updating execution status:`, error);
+  }
+}
+
 // Authelia SSO Middleware
 async function authenticateSSO(req, res, next) {
   // Check for Authelia headers
@@ -308,6 +481,237 @@ async function authenticateSSO(req, res, next) {
   next();
 }
 
+// Workflow Execution Engine
+async function executeWorkflowSteps(executionId, workflowId, definition, username) {
+  try {
+    console.log(`[Workflow] Starting execution ${executionId} for workflow ${workflowId}`);
+
+    const steps = definition.steps || [];
+    let allStepsSucceeded = true;
+
+    for (let i = 0; i < steps.length; i++) {
+      const step = steps[i];
+      console.log(`[Workflow] Execution ${executionId} - Step ${i + 1}/${steps.length}: ${step.name}`);
+
+      // Add step start log
+      await addExecutionLog(executionId, {
+        step: i + 1,
+        step_name: step.name,
+        action: 'step_started',
+        timestamp: new Date().toISOString()
+      });
+
+      broadcast({
+        type: 'workflow_step_started',
+        execution_id: executionId,
+        step: i + 1,
+        step_name: step.name
+      });
+
+      if (step.type === 'execute') {
+        // Execute command step
+        const success = await executeCommandStep(executionId, step, i + 1);
+        if (!success) {
+          allStepsSucceeded = false;
+          break; // Stop workflow on failure
+        }
+      } else if (step.type === 'wait') {
+        // Wait step (delay in seconds)
+        const seconds = step.duration || 5;
+        await addExecutionLog(executionId, {
+          step: i + 1,
+          action: 'waiting',
+          duration: seconds,
+          timestamp: new Date().toISOString()
+        });
+        await new Promise(resolve => setTimeout(resolve, seconds * 1000));
+      } else if (step.type === 'prompt') {
+        // Interactive prompt step (not fully implemented, would need user interaction)
+        await addExecutionLog(executionId, {
+          step: i + 1,
+          action: 'prompt_skipped',
+          message: 'Interactive prompts not yet supported',
+          timestamp: new Date().toISOString()
+        });
+      }
+
+      // Add step completion log
+      await addExecutionLog(executionId, {
+        step: i + 1,
+        step_name: step.name,
+        action: 'step_completed',
+        timestamp: new Date().toISOString()
+      });
+
+      broadcast({
+        type: 'workflow_step_completed',
+        execution_id: executionId,
+        step: i + 1,
+        step_name: step.name
+      });
+    }
+
+    // Mark execution as completed or failed
+    const finalStatus = allStepsSucceeded ? 'completed' : 'failed';
+    await updateExecutionStatus(executionId, finalStatus);
+
+    console.log(`[Workflow] Execution ${executionId} finished with status: ${finalStatus}`);
+
+  } catch (error) {
+    console.error(`[Workflow] Execution ${executionId} error:`, error);
+    await addExecutionLog(executionId, {
+      action: 'workflow_error',
+      error: error.message,
+      timestamp: new Date().toISOString()
+    });
+    await updateExecutionStatus(executionId, 'failed');
+  }
+}
+
+async function executeCommandStep(executionId, step, stepNumber) {
+  try {
+    const command = step.command;
+    const targets = step.targets || ['all'];
+
+    // Determine which workers to target
+    let targetWorkerIds = [];
+
+    if (targets.includes('all')) {
+      // Get all online workers
+      const [onlineWorkers] = await pool.query('SELECT id FROM workers WHERE status = ?', ['online']);
+      targetWorkerIds = onlineWorkers.map(w => w.id);
+    } else {
+      // Specific worker IDs or names
+      for (const target of targets) {
+        // Try to find by ID first, then by name
+        const [workerById] = await pool.query('SELECT id FROM workers WHERE id = ?', [target]);
+        if (workerById.length > 0) {
+          targetWorkerIds.push(workerById[0].id);
+        } else {
+          const [workerByName] = await pool.query('SELECT id FROM workers WHERE name = ?', [target]);
+          if (workerByName.length > 0) {
+            targetWorkerIds.push(workerByName[0].id);
+          }
+        }
+      }
+    }
+
+    if (targetWorkerIds.length === 0) {
+      await addExecutionLog(executionId, {
+        step: stepNumber,
+        action: 'no_workers',
+        message: 'No workers available for this step',
+        timestamp: new Date().toISOString()
+      });
+      return false;
+    }
+
+    // Execute command on each target worker and wait for results
+    const results = [];
+
+    for (const workerId of targetWorkerIds) {
+      const workerWs = workers.get(workerId);
+
+      if (!workerWs || workerWs.readyState !== WebSocket.OPEN) {
+        await addExecutionLog(executionId, {
+          step: stepNumber,
+          action: 'worker_offline',
+          worker_id: workerId,
+          timestamp: new Date().toISOString()
+        });
+        continue;
+      }
+
+      // Send command to worker
+      const commandId = generateUUID();
+
+      await addExecutionLog(executionId, {
+        step: stepNumber,
+        action: 'command_sent',
+        worker_id: workerId,
+        command: command,
+        command_id: commandId,
+        timestamp: new Date().toISOString()
+      });
+
+      workerWs.send(JSON.stringify({
+        type: 'execute_command',
+        execution_id: executionId,
+        command_id: commandId,
+        command: command,
+        worker_id: workerId,
+        timeout: 120000 // 2 minute timeout
+      }));
+
+      // Wait for command result (with timeout)
+      const result = await waitForCommandResult(executionId, commandId, 120000);
+      results.push(result);
+
+      if (!result.success) {
+        // Command failed, workflow should stop
+        return false;
+      }
+    }
+
+    // All commands succeeded
+    return results.every(r => r.success);
+
+  } catch (error) {
+    console.error(`[Workflow] Error executing command step:`, error);
+    await addExecutionLog(executionId, {
+      step: stepNumber,
+      action: 'step_error',
+      error: error.message,
+      timestamp: new Date().toISOString()
+    });
+    return false;
+  }
+}
+
+async function waitForCommandResult(executionId, commandId, timeout) {
+  return new Promise((resolve) => {
+    const startTime = Date.now();
+
+    const checkInterval = setInterval(async () => {
+      try {
+        // Check if we've received the command result in logs
+        const [execution] = await pool.query('SELECT logs FROM executions WHERE id = ?', [executionId]);
+
+        if (execution.length > 0) {
+          const logs = typeof execution[0].logs === 'string' ? JSON.parse(execution[0].logs) : execution[0].logs;
+          const resultLog = logs.find(log => log.command_id === commandId && log.action === 'command_result');
+
+          if (resultLog) {
+            clearInterval(checkInterval);
+            resolve({
+              success: resultLog.success,
+              stdout: resultLog.stdout,
+              stderr: resultLog.stderr
+            });
+            return;
+          }
+        }
+
+        // Check timeout
+        if (Date.now() - startTime > timeout) {
+          clearInterval(checkInterval);
+          resolve({
+            success: false,
+            error: 'Command timeout'
+          });
+        }
+      } catch (error) {
+        console.error('[Workflow] Error checking command result:', error);
+        clearInterval(checkInterval);
+        resolve({
+          success: false,
+          error: error.message
+        });
+      }
+    }, 500); // Check every 500ms
+  });
+}
+
 // Routes - All protected by SSO
 app.get('/api/user', authenticateSSO, (req, res) => {
   res.json(req.user);
@@ -326,15 +730,24 @@ app.post('/api/workflows', authenticateSSO, async (req, res) => {
   try {
     const { name, description, definition } = req.body;
     const id = generateUUID();
-    
+
+    console.log('[Workflow] Creating workflow:', name);
+    console.log('[Workflow] Definition:', JSON.stringify(definition, null, 2));
+
     await pool.query(
       'INSERT INTO workflows (id, name, description, definition, created_by) VALUES (?, ?, ?, ?, ?)',
       [id, name, description, JSON.stringify(definition), req.user.username]
     );
-    
+
+    console.log('[Workflow] Successfully inserted workflow:', id);
+
     res.json({ id, name, description, definition });
+
+    console.log('[Workflow] Broadcasting workflow_created');
     broadcast({ type: 'workflow_created', workflow_id: id });
+    console.log('[Workflow] Broadcast complete');
   } catch (error) {
+    console.error('[Workflow] Error creating workflow:', error);
     res.status(500).json({ error: error.message });
   }
 });
@@ -394,13 +807,29 @@ app.post('/api/executions', authenticateSSO, async (req, res) => {
   try {
     const { workflow_id } = req.body;
     const id = generateUUID();
-    
+
+    // Get workflow definition
+    const [workflows] = await pool.query('SELECT * FROM workflows WHERE id = ?', [workflow_id]);
+    if (workflows.length === 0) {
+      return res.status(404).json({ error: 'Workflow not found' });
+    }
+
+    const workflow = workflows[0];
+    const definition = typeof workflow.definition === 'string' ? JSON.parse(workflow.definition) : workflow.definition;
+
+    // Create execution record
     await pool.query(
       'INSERT INTO executions (id, workflow_id, status, started_by, started_at, logs) VALUES (?, ?, ?, ?, NOW(), ?)',
       [id, workflow_id, 'running', req.user.username, JSON.stringify([])]
     );
-    
+
     broadcast({ type: 'execution_started', execution_id: id, workflow_id });
+
+    // Start workflow execution asynchronously
+    executeWorkflowSteps(id, workflow_id, definition, req.user.username).catch(err => {
+      console.error(`[Workflow] Execution ${id} failed:`, err);
+    });
+
     res.json({ id, workflow_id, status: 'running' });
   } catch (error) {
     res.status(500).json({ error: error.message });
@@ -409,10 +838,25 @@ app.post('/api/executions', authenticateSSO, async (req, res) => {
 
 app.get('/api/executions', authenticateSSO, async (req, res) => {
   try {
+    const limit = parseInt(req.query.limit) || 50;
+    const offset = parseInt(req.query.offset) || 0;
+
     const [rows] = await pool.query(
-      'SELECT e.*, w.name as workflow_name FROM executions e LEFT JOIN workflows w ON e.workflow_id = w.id ORDER BY e.started_at DESC LIMIT 50'
+      'SELECT e.*, w.name as workflow_name FROM executions e LEFT JOIN workflows w ON e.workflow_id = w.id ORDER BY e.started_at DESC LIMIT ? OFFSET ?',
+      [limit, offset]
     );
-    res.json(rows);
+
+    // Get total count
+    const [countRows] = await pool.query('SELECT COUNT(*) as total FROM executions');
+    const total = countRows[0].total;
+
+    res.json({
+      executions: rows,
+      total: total,
+      limit: limit,
+      offset: offset,
+      hasMore: offset + rows.length < total
+    });
   } catch (error) {
     res.status(500).json({ error: error.message });
   }
@@ -428,6 +872,104 @@ app.delete('/api/executions/:id', authenticateSSO, async (req, res) => {
   }
 });
 
+app.post('/api/executions/:id/abort', authenticateSSO, async (req, res) => {
+  try {
+    const executionId = req.params.id;
+
+    // Check if execution exists and is running
+    const [execution] = await pool.query('SELECT status FROM executions WHERE id = ?', [executionId]);
+
+    if (execution.length === 0) {
+      return res.status(404).json({ error: 'Execution not found' });
+    }
+
+    if (execution[0].status !== 'running') {
+      return res.status(400).json({ error: 'Execution is not running' });
+    }
+
+    // Add abort log entry
+    await addExecutionLog(executionId, {
+      action: 'execution_aborted',
+      aborted_by: req.user.username,
+      timestamp: new Date().toISOString()
+    });
+
+    // Update execution status to failed
+    await updateExecutionStatus(executionId, 'failed');
+
+    console.log(`[Execution] Execution ${executionId} aborted by ${req.user.username}`);
+
+    res.json({ success: true });
+  } catch (error) {
+    console.error('[Execution] Error aborting execution:', error);
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Scheduled Commands API
+app.get('/api/scheduled-commands', authenticateSSO, async (req, res) => {
+  try {
+    const [schedules] = await pool.query(
+      'SELECT * FROM scheduled_commands ORDER BY created_at DESC'
+    );
+    res.json(schedules);
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+app.post('/api/scheduled-commands', authenticateSSO, async (req, res) => {
+  try {
+    const { name, command, worker_ids, schedule_type, schedule_value } = req.body;
+
+    if (!name || !command || !worker_ids || !schedule_type || !schedule_value) {
+      return res.status(400).json({ error: 'Missing required fields' });
+    }
+
+    const id = generateUUID();
+    const nextRun = calculateNextRun(schedule_type, schedule_value);
+
+    await pool.query(
+      `INSERT INTO scheduled_commands
+       (id, name, command, worker_ids, schedule_type, schedule_value, created_by, next_run)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
+      [id, name, command, JSON.stringify(worker_ids), schedule_type, schedule_value, req.user.username, nextRun]
+    );
+
+    res.json({ success: true, id });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+app.put('/api/scheduled-commands/:id/toggle', authenticateSSO, async (req, res) => {
+  try {
+    const { id } = req.params;
+    const [current] = await pool.query('SELECT enabled FROM scheduled_commands WHERE id = ?', [id]);
+
+    if (current.length === 0) {
+      return res.status(404).json({ error: 'Schedule not found' });
+    }
+
+    const newEnabled = !current[0].enabled;
+    await pool.query('UPDATE scheduled_commands SET enabled = ? WHERE id = ?', [newEnabled, id]);
+
+    res.json({ success: true, enabled: newEnabled });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+app.delete('/api/scheduled-commands/:id', authenticateSSO, async (req, res) => {
+  try {
+    const { id } = req.params;
+    await pool.query('DELETE FROM scheduled_commands WHERE id = ?', [id]);
+    res.json({ success: true });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
 // Health check (no auth required)
 app.get('/health', async (req, res) => {
   try {
@@ -467,299 +1009,6 @@ initDatabase().then(() => {
 
 // ============================================
 // WORKFLOW EXECUTION ENGINE
-// ============================================
-
-// Store active workflow executions in memory
-const activeExecutions = new Map();
-
-// Execute workflow step by step
-async function executeWorkflow(workflowId, executionId, userId, targetWorkers = 'all') {
-  try {
-    // Get workflow definition
-    const [workflows] = await pool.query('SELECT * FROM workflows WHERE id = ?', [workflowId]);
-    if (workflows.length === 0) {
-      throw new Error('Workflow not found');
-    }
-
-    const workflow = workflows[0];
-    const definition = JSON.parse(workflow.definition);
-    
-    // Initialize execution state
-    const executionState = {
-      id: executionId,
-      workflowId: workflowId,
-      currentStep: 0,
-      steps: definition.steps || [],
-      results: [],
-      status: 'running',
-      waitingForInput: false,
-      targetWorkers: targetWorkers,
-      userId: userId
-    };
-
-    activeExecutions.set(executionId, executionState);
-
-    // Start executing steps
-    await executeNextStep(executionId);
-
-  } catch (error) {
-    console.error('Workflow execution error:', error);
-    await updateExecutionStatus(executionId, 'failed', error.message);
-  }
-}
-
-// Execute the next step in a workflow
-async function executeNextStep(executionId) {
-  const state = activeExecutions.get(executionId);
-  if (!state) return;
-
-  // Check if we've completed all steps
-  if (state.currentStep >= state.steps.length) {
-    await updateExecutionStatus(executionId, 'completed');
-    activeExecutions.delete(executionId);
-    return;
-  }
-
-  const step = state.steps[state.currentStep];
-  
-  // Check if step has a condition
-  if (step.condition && !evaluateCondition(step.condition, state)) {
-    console.log(`[Workflow] Skipping step ${state.currentStep}: condition not met`);
-    state.currentStep++;
-    return executeNextStep(executionId);
-  }
-
-  console.log(`[Workflow] Executing step ${state.currentStep}: ${step.name}`);
-
-  try {
-    switch (step.type) {
-      case 'execute':
-        await executeCommandStep(executionId, step);
-        break;
-      case 'prompt':
-        await executePromptStep(executionId, step);
-        break;
-      case 'wait':
-        await executeWaitStep(executionId, step);
-        break;
-      default:
-        throw new Error(`Unknown step type: ${step.type}`);
-    }
-  } catch (error) {
-    await addExecutionLog(executionId, {
-      step: state.currentStep,
-      error: error.message,
-      timestamp: new Date().toISOString()
-    });
-    await updateExecutionStatus(executionId, 'failed', error.message);
-    activeExecutions.delete(executionId);
-  }
-}
-
-// Execute a command on workers
-async function executeCommandStep(executionId, step) {
-  const state = activeExecutions.get(executionId);
-  
-  // Get target workers
-  const [workers] = await pool.query(
-    'SELECT * FROM workers WHERE status = "online"'
-  );
-
-  if (workers.length === 0) {
-    throw new Error('No online workers available');
-  }
-
-  // Filter workers based on target
-  let targetWorkers = workers;
-  if (step.targets && step.targets[0] !== 'all') {
-    targetWorkers = workers.filter(w => step.targets.includes(w.name));
-  }
-
-  // Send command to workers via WebSocket
-  const commandMessage = {
-    type: 'execute_command',
-    execution_id: executionId,
-    step_index: state.currentStep,
-    command: step.command,
-    timeout: step.timeout || 300000
-  };
-
-  // Broadcast to target workers
-  clients.forEach(client => {
-    if (client.readyState === WebSocket.OPEN) {
-      client.send(JSON.stringify(commandMessage));
-    }
-  });
-
-  await addExecutionLog(executionId, {
-    step: state.currentStep,
-    action: 'command_sent',
-    command: step.command,
-    workers: targetWorkers.map(w => w.name),
-    timestamp: new Date().toISOString()
-  });
-
-  // For now, move to next step immediately
-  // In production, we'd wait for worker responses
-  state.currentStep++;
-  
-  // Small delay to allow command to execute
-  setTimeout(() => executeNextStep(executionId), 1000);
-}
-
-// Execute a user prompt step
-async function executePromptStep(executionId, step) {
-  const state = activeExecutions.get(executionId);
-  
-  state.waitingForInput = true;
-  state.promptData = {
-    message: step.message,
-    options: step.options,
-    step: state.currentStep
-  };
-
-  await addExecutionLog(executionId, {
-    step: state.currentStep,
-    action: 'waiting_for_input',
-    prompt: step.message,
-    timestamp: new Date().toISOString()
-  });
-
-  // Notify frontend that input is needed
-  broadcast({
-    type: 'execution_prompt',
-    execution_id: executionId,
-    prompt: state.promptData
-  });
-}
-
-// Execute a wait/delay step
-async function executeWaitStep(executionId, step) {
-  const state = activeExecutions.get(executionId);
-  const delay = step.duration || 1000;
-
-  await addExecutionLog(executionId, {
-    step: state.currentStep,
-    action: 'waiting',
-    duration: delay,
-    timestamp: new Date().toISOString()
-  });
-
-  state.currentStep++;
-  setTimeout(() => executeNextStep(executionId), delay);
-}
-
-// Handle user input for prompts
-function handleUserInput(executionId, response) {
-  const state = activeExecutions.get(executionId);
-  if (!state || !state.waitingForInput) {
-    return false;
-  }
-
-  state.promptResponse = response;
-  state.waitingForInput = false;
-  state.currentStep++;
-
-  addExecutionLog(executionId, {
-    step: state.currentStep - 1,
-    action: 'user_response',
-    response: response,
-    timestamp: new Date().toISOString()
-  });
-
-  executeNextStep(executionId);
-  return true;
-}
-
-// Evaluate conditions
-function evaluateCondition(condition, state) {
-  try {
-    // Simple condition evaluation
-    // In production, use a proper expression evaluator
-    const promptResponse = state.promptResponse;
-    return eval(condition);
-  } catch (error) {
-    console.error('Condition evaluation error:', error);
-    return false;
-  }
-}
-
-// Helper functions
-async function updateExecutionStatus(executionId, status, error = null) {
-  const updates = { status };
-  if (status === 'completed' || status === 'failed') {
-    updates.completed_at = new Date();
-  }
-  if (error) {
-    // Add error to logs
-    await addExecutionLog(executionId, { error, timestamp: new Date().toISOString() });
-  }
-
-  await pool.query(
-    'UPDATE executions SET status = ?, completed_at = ? WHERE id = ?',
-    [status, updates.completed_at || null, executionId]
-  );
-
-  broadcast({
-    type: 'execution_status',
-    execution_id: executionId,
-    status: status
-  });
-}
-
-async function addExecutionLog(executionId, logEntry) {
-  const [rows] = await pool.query('SELECT logs FROM executions WHERE id = ?', [executionId]);
-  if (rows.length === 0) return;
-
-  const logs = JSON.parse(rows[0].logs || '[]');
-  logs.push(logEntry);
-
-  await pool.query('UPDATE executions SET logs = ? WHERE id = ?', [
-    JSON.stringify(logs),
-    executionId
-  ]);
-}
-
-// ============================================
-// API ROUTES - Add these to your server.js
-// ============================================
-
-// Start workflow execution
-app.post('/api/executions', authenticateSSO, async (req, res) => {
-  try {
-    const { workflow_id, target_workers } = req.body;
-    const id = generateUUID();
-    
-    await pool.query(
-      'INSERT INTO executions (id, workflow_id, status, started_by, started_at, logs) VALUES (?, ?, ?, ?, NOW(), ?)',
-      [id, workflow_id, 'running', req.user.username, JSON.stringify([])]
-    );
-    
-    // Start execution
-    executeWorkflow(workflow_id, id, req.user.username, target_workers || 'all');
-    
-    broadcast({ type: 'execution_started', execution_id: id, workflow_id });
-    res.json({ id, workflow_id, status: 'running' });
-  } catch (error) {
-    res.status(500).json({ error: error.message });
-  }
-});
-
-// Respond to workflow prompt
-app.post('/api/executions/:id/respond', authenticateSSO, async (req, res) => {
-  try {
-    const { response } = req.body;
-    const success = handleUserInput(req.params.id, response);
-    
-    if (success) {
-      res.json({ success: true });
-    } else {
-      res.status(400).json({ error: 'Execution not waiting for input' });
-    }
-  } catch (error) {
-    res.status(500).json({ error: error.message });
-  }
-});
 
 // Get execution details with logs
 app.get('/api/executions/:id', authenticateSSO, async (req, res) => {
@@ -768,15 +1017,12 @@ app.get('/api/executions/:id', authenticateSSO, async (req, res) => {
     if (rows.length === 0) {
       return res.status(404).json({ error: 'Not found' });
     }
-    
+
     const execution = rows[0];
-    const state = activeExecutions.get(req.params.id);
-    
+
     res.json({
       ...execution,
-      logs: JSON.parse(execution.logs || '[]'),
-      waiting_for_input: state?.waitingForInput || false,
-      prompt: state?.promptData || null
+      logs: JSON.parse(execution.logs || '[]')
     });
   } catch (error) {
     res.status(500).json({ error: error.message });