fix(launcher): start-hidden.vbs must be ASCII + CRLF, use python.exe

Three separate bugs in the VBS launcher wedged together:

1. The previous fix added a UTF-8 em-dash in a comment. wscript.exe
   on Windows refused to execute the file with "Execution of the
   Windows Script Host failed. (Not enough memory resources are
   available to complete this operation.)" — a misleading error that
   actually means "I could not parse this file as ANSI VBScript".
   Fix: keep the file pure ASCII, convert to CRLF.

2. The launcher was invoking pythonw.exe. WshShell.Run spawning
   pythonw.exe inside the wscript host exited immediately (no process,
   no log). python.exe with WindowStyle=0 works reliably and matches
   the pattern used by the Media Server sibling app's VBS launcher,
   which has been running on this machine without issue.

3. The env vars (PYTHONPATH, WLED_CONFIG_PATH) must be set before the
   child process spawns, otherwise config.py falls back to the CWD
   default path that does not exist at install time.

server/scripts/start-hidden.vbs

@@ -1,25 +1,18 @@
-' Launch wled_controller silently (no console, no window).
-' Used by the Start Menu / autostart / desktop shortcut created by the
-' NSIS installer. Must set the same env vars as LedGrab.bat, otherwise
-' the server runs with built-in defaults (wrong config path, wrong data
-' dir) and the UI appears to be unconfigured on every startup.
-
 Set fso = CreateObject("Scripting.FileSystemObject")
 Set WshShell = CreateObject("WScript.Shell")
-
 ' Get the directory of this script (scripts\), then go up to app root
 scriptDir = fso.GetParentFolderName(WScript.ScriptFullName)
 appRoot = fso.GetParentFolderName(scriptDir)
 WshShell.CurrentDirectory = appRoot
 
-' Set environment variables for the child process. WshShell.Environment("Process")
+' Set env vars for the child process (inherited via WshShell.Run)
-' is writable and child processes spawned via Run inherit it.
 Set procEnv = WshShell.Environment("Process")
 procEnv("PYTHONPATH") = appRoot & "\app\src"
 procEnv("WLED_CONFIG_PATH") = appRoot & "\app\config\default_config.yaml"
 
-' Use embedded Python if present (installed dist), otherwise system Python
+' Use embedded python.exe (NOT pythonw.exe) with WindowStyle=0.
-embeddedPython = appRoot & "\python\pythonw.exe"
+' Same pattern as the Media Server sibling app.
+embeddedPython = appRoot & "\python\python.exe"
 If fso.FileExists(embeddedPython) Then
     WshShell.Run """" & embeddedPython & """ -m wled_controller", 0, False
 Else