feat: add LoRa Manager E2E testing skill documentation

Introduce comprehensive documentation for the new `lora-manager-e2e` skill, which provides end-to-end testing workflows for LoRa Manager. The skill enables automated validation of standalone mode, including server management, UI interaction via Chrome DevTools MCP, and frontend-to-backend integration testing.

Key additions:
- Detailed skill description and prerequisites
- Quick start workflow for server setup and browser debugging
- Common E2E test patterns for page load verification, server restart, and API testing
- Example test flows demonstrating step-by-step validation procedures
- Scripts and MCP command examples for practical implementation

This documentation supports automated testing of LoRa Manager's web interface and backend functionality, ensuring reliable end-to-end validation of features.

.agents/skills/lora-manager-e2e/scripts/start_server.py

@@ -0,0 +1,169 @@
+#!/usr/bin/env python3
+"""
+Start or restart LoRa Manager standalone server for E2E testing.
+"""
+
+import argparse
+import subprocess
+import sys
+import time
+import socket
+import signal
+import os
+
+
+def find_server_process(port: int) -> list[int]:
+    """Find PIDs of processes listening on the given port."""
+    try:
+        result = subprocess.run(
+            ["lsof", "-ti", f":{port}"],
+            capture_output=True,
+            text=True,
+            check=False
+        )
+        if result.returncode == 0 and result.stdout.strip():
+            return [int(pid) for pid in result.stdout.strip().split("\n") if pid]
+    except FileNotFoundError:
+        # lsof not available, try netstat
+        try:
+            result = subprocess.run(
+                ["netstat", "-tlnp"],
+                capture_output=True,
+                text=True,
+                check=False
+            )
+            pids = []
+            for line in result.stdout.split("\n"):
+                if f":{port}" in line:
+                    parts = line.split()
+                    for part in parts:
+                        if "/" in part:
+                            try:
+                                pid = int(part.split("/")[0])
+                                pids.append(pid)
+                            except ValueError:
+                                pass
+            return pids
+        except FileNotFoundError:
+            pass
+    return []
+
+
+def kill_server(port: int) -> None:
+    """Kill processes using the specified port."""
+    pids = find_server_process(port)
+    for pid in pids:
+        try:
+            os.kill(pid, signal.SIGTERM)
+            print(f"Sent SIGTERM to process {pid}")
+        except ProcessLookupError:
+            pass
+    
+    # Wait for processes to terminate
+    time.sleep(1)
+    
+    # Force kill if still running
+    pids = find_server_process(port)
+    for pid in pids:
+        try:
+            os.kill(pid, signal.SIGKILL)
+            print(f"Sent SIGKILL to process {pid}")
+        except ProcessLookupError:
+            pass
+
+
+def is_server_ready(port: int, timeout: float = 0.5) -> bool:
+    """Check if server is accepting connections."""
+    try:
+        with socket.create_connection(("127.0.0.1", port), timeout=timeout):
+            return True
+    except (socket.timeout, ConnectionRefusedError, OSError):
+        return False
+
+
+def wait_for_server(port: int, timeout: int = 30) -> bool:
+    """Wait for server to become ready."""
+    start = time.time()
+    while time.time() - start < timeout:
+        if is_server_ready(port):
+            return True
+        time.sleep(0.5)
+    return False
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Start LoRa Manager standalone server for E2E testing"
+    )
+    parser.add_argument(
+        "--port",
+        type=int,
+        default=8188,
+        help="Server port (default: 8188)"
+    )
+    parser.add_argument(
+        "--restart",
+        action="store_true",
+        help="Kill existing server before starting"
+    )
+    parser.add_argument(
+        "--wait",
+        action="store_true",
+        help="Wait for server to be ready before exiting"
+    )
+    parser.add_argument(
+        "--timeout",
+        type=int,
+        default=30,
+        help="Timeout for waiting (default: 30)"
+    )
+    
+    args = parser.parse_args()
+    
+    # Get project root (parent of .agents directory)
+    script_dir = os.path.dirname(os.path.abspath(__file__))
+    skill_dir = os.path.dirname(script_dir)
+    project_root = os.path.dirname(os.path.dirname(os.path.dirname(skill_dir)))
+    
+    # Restart if requested
+    if args.restart:
+        print(f"Killing existing server on port {args.port}...")
+        kill_server(args.port)
+        time.sleep(1)
+    
+    # Check if already running
+    if is_server_ready(args.port):
+        print(f"Server already running on port {args.port}")
+        return 0
+    
+    # Start server
+    print(f"Starting LoRa Manager standalone server on port {args.port}...")
+    cmd = [sys.executable, "standalone.py", "--port", str(args.port)]
+    
+    # Start in background
+    process = subprocess.Popen(
+        cmd,
+        cwd=project_root,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        start_new_session=True
+    )
+    
+    print(f"Server process started with PID {process.pid}")
+    
+    # Wait for ready if requested
+    if args.wait:
+        print(f"Waiting for server to be ready (timeout: {args.timeout}s)...")
+        if wait_for_server(args.port, args.timeout):
+            print(f"Server ready at http://127.0.0.1:{args.port}/loras")
+            return 0
+        else:
+            print(f"Timeout waiting for server")
+            return 1
+    
+    print(f"Server starting at http://127.0.0.1:{args.port}/loras")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())