Port serial layer to pyserial; add Windows COM detection and PyInstaller spec

- serial_port.py: replace termios/fcntl/select with pyserial wrapper,
  same SerialPort interface preserved for all other modules
- workflow_serial.py: detect_serial_device() uses serial.tools.list_ports
  to enumerate COM ports; removes _fix_permissions() (not needed on Windows);
  multi-device table now shows port description
- es24n_conf.py: enable VT/ANSI colour mode on Windows 10+ via ctypes;
  update docstring for Windows edition
- requirements.txt: pyserial >= 3.5, pyinstaller >= 6.0
- es24n_conf.spec: PyInstaller single-file .exe spec

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

modules/workflow_serial.py

@@ -9,14 +9,13 @@ All Redfish operations are therefore performed by issuing curl commands over
 the serial connection and parsing the JSON responses.
 """
 
-import glob
 import json
-import os
 import re
-import subprocess
 import time
 from typing import Optional
 
+import serial.tools.list_ports
+
 from models import IOMConfig, ShelfConfig
 from serial_port import SerialPort
 from ui import (
@@ -235,7 +234,7 @@ def detect_serial_device() -> Optional[str]:
     rule("Step 1 of 5 -- Serial Cable & Device Detection")
 
     print("  Connect the serial cable from the ES24N IOM port")
-    print("  to the active F-Series controller USB port.")
+    print("  to a USB port on this Windows machine.")
     print()
     prompt("Press Enter when the cable is connected")
 
@@ -243,9 +242,9 @@ def detect_serial_device() -> Optional[str]:
         info(f"Scanning for USB serial devices (attempt {attempt}/3)...")
         time.sleep(1)
 
-        # FreeBSD: /dev/ttyU*   Linux: /dev/ttyUSB*, /dev/ttyACM*
-        patterns = ["/dev/ttyUSB*", "/dev/ttyACM*", "/dev/ttyU*"]
-        ports    = sorted({p for pat in patterns for p in glob.glob(pat)})
+        all_ports = serial.tools.list_ports.comports()
+        usb_ports = [p for p in all_ports if p.hwid and "USB" in p.hwid.upper()]
+        ports     = sorted(p.device for p in usb_ports)
 
         if ports:
             break
@@ -259,21 +258,22 @@ def detect_serial_device() -> Optional[str]:
         print()
         print("  Troubleshooting:")
         print("    - Ensure the serial cable is fully seated at both ends.")
-        print("    - Try a different USB port on the controller.")
+        print("    - Try a different USB port on this machine.")
         print("    - Confirm the ES24N is powered on.")
+        print("    - Check Device Manager for the COM port assignment.")
         return None
 
     if len(ports) == 1:
         ok(f"Device found: {_c(C.BOLD, ports[0])}")
-        _fix_permissions(ports[0])
         return ports[0]
 
     # Multiple devices — let the user choose
+    port_objs = {p.device: p for p in usb_ports}
     print()
     draw_table(
-        ["#", "Device"],
-        [[str(i), p] for i, p in enumerate(ports, 1)],
-        [4, 24],
+        ["#", "Port",  "Description"],
+        [[str(i), p, port_objs[p].description or ""] for i, p in enumerate(ports, 1)],
+        [4, 8, 40],
     )
     print()
 
@@ -282,30 +282,10 @@ def detect_serial_device() -> Optional[str]:
         if val.isdigit() and 1 <= int(val) <= len(ports):
             selected = ports[int(val) - 1]
             ok(f"Selected: {_c(C.BOLD, selected)}")
-            _fix_permissions(selected)
             return selected
         warn(f"Please enter a number between 1 and {len(ports)}.")
 
 
-def _fix_permissions(device: str):
-    try:
-        result = subprocess.run(
-            ["sudo", "chown", ":wheel", device],
-            capture_output=True, timeout=5,
-        )
-        if result.returncode == 0:
-            ok(f"Permissions updated on {device}")
-            return
-    except Exception:
-        pass
-    try:
-        os.chmod(device, 0o666)
-        ok(f"Permissions updated on {device}")
-    except PermissionError:
-        warn("Could not update device permissions automatically.")
-        warn("If the connection fails, re-run this script with sudo.")
-
-
 # ── Step 2: Open serial connection & wake IOM console ─────────────────────────
 def open_serial_connection(device: str) -> Optional[SerialPort]:
     rule("Step 2 of 5 -- Opening Serial Connection")