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>

.gitignore

@@ -30,3 +30,6 @@ Thumbs.db
 *.swp
 *.swo
 *~
+
+# Claude
+Claude.md

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 🔐